The 10 Great Items to Recycle to save our Planet

Recycle is to reuse or make available for reuse for biological activities through natural processes of biochemical degradation or modification. Recycling is the process of converting waste materials into new materials and objects. Recycling is a key component of modern waste reduction and is the third component of the “Reduce, Reuse, and Recycle” waste hierarchy. It promotes environmental sustainability by removing raw material input and redirecting waste output in the economic system. The recyclability of a material depends on its ability to reacquire the properties it had in its original state. It can also prevent the waste of potentially useful materials and reduce the consumption of fresh raw materials, reducing energy use, air pollution and water pollution. Recycling Conserves natural resources such as timber, water and minerals. Disposable waste is bad for the environment, plain. Most of us want to help the environment today by recycling as much as we can. On average, Americans recycled and composted 1.5 pounds of waste of a total of 4.4 pounds per person that year. Here is the list of top 10 items to recycle to save our planet.

1.Plastics

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Plastic is by far the best thing you can recycle to save our planet. So many plastic products are disposable, but plastic lasts forever in the environment. The fact that plastic takes forever to break down. Even when it does, it creates micro-plastics that are small in size which easily get into all sorts of places it shouldn’t be. Polyethylene terephthalate (PET) and HDPE are the most commonly recycled plastics, whereas the other types are generally tougher to recycle.You can tell what type of plastic it is by using the number scale from 1-7 found labeled on your plastic products. Polyethylene terephthalate (PET) plastic is used for water, soda and juice bottles. PET is labelled as #1 and is the most commonly recycled plastic. If you often drink water from plastic bottles then you should definitely be using a commercial recycling bin at work to collect your plastic waste. HDPE (#2) is the second most commonly recycled form of plastic. If you don’t already have a commercial recycling bin, then you’ll be happy to know that CleanRiver’s are actually made from recycled HDPE. Thicker plastic bottles used for shampoo, detergent and similar items can also be recycled. Recycling them helps the environment tremendously.

  1. Paper
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Newspapers are one of the easiest materials to recycle. Mixed paper is also one of the easiest materials to recycle. Make sure your waste paper ends up at the recycle center. Paper can also be sustainably and easily repurposed. Reuse and repurposing options include reusing waste paper for wrapping, packaging, composting, cleaning, lining pet cages, etc. It saves waste paper from occupying homes of people and producing methane as it breaks down. Because paper fibre contains carbon (originally absorbed by the tree from which it was produced), recycling keeps the carbon locked up for longer and out of the atmosphere. The process of waste paper recycling most often involves mixing used/old paper with water and chemicals to break it down. It is then chopped up and heated, which breaks it down further into strands of cellulose, a type of organic plant material; this resulting mixture is called pulp, or slurry. It is strained through screens, which remove plastic (especially from plastic-coated paper) that may still be in the mixture then cleaned, de-inked (ink is removed), bleached, and mixed with water. Then it can be made into new recycled paper.[4]It is not just newspapers that you can recycle at home. Also, recycle wrapping paper, envelopes, birthday cards and phone books. All sorts of cardboard can be recycled, too. Books, newspapers, and even glossy magazines can be recycled in your outdoor recycling bins at home. As for the office throwing your paper into a dedicated office recycling bin is just as good. If your office doesn’t already have an easy way to recycle paper, consider setting up an office recycling program. Don’t forget about fibre board, paperboard, and cardboard either. Sending one ton of cardboard to the recycling center can save over 9 cubic yards of landfill space and 24 percent of the energy required to make new cardboard.

3.Glass

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Glass is made from sand. Now that may seem redundant but the world is actually running out of sand. The whole point of recycling is to help the environment and reduce resource consumption. So better way is to save the sand than to conserve it via glass recycling. It’s also one of the easier materials to recycle. Glass containers used in food and beverage packaging are 100 percent recyclable. They can be substituted for up to 95 percent of raw materials when new glass products are being made, making glass recycling highly friendly to the environment.
Glass that is crushed and ready to be remelted is called cullet. cullet is composed of defective products detected and rejected by a quality control process during the industrial process of glass manufacturing, transition phases of product changes (such as thickness and colour changes) and production offcuts. External cullet is waste glass that has been collected or reprocessed with the purpose of recycling. External cullet (which can be pre- or post-consumer) is classified as waste. To be recycled, glass waste needs to be purified and cleaned of contamination.

4.Electronics

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If you didn’t already know, most electronic waste contains recyclable materials that can be harmful for the environment if left to sit in a landfill. If you need help identifying e-waste and would like to prevent improper electronic waste disposal. Whether it’s developing the latest battery technology, controlling pollution while meeting product demand, or managing energy and water resources, you are part of a collaborative community. Technological change is happening so quickly that most electrical products are discarded before they are obsolete and by 2050, we are on track to produce 120 million tonnes of electronic waste per year. Some of the most prevalent health effects are associated with poor working and living conditions that predispose people to physical injury, stress and exposure to mosquitoes. Burning and dismantling devices causes the release of various chemicals into the air. Heavy metals and other toxic particles have the potential to cause many adverse health effects.

5.Metals

steel waste
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Metal can be found in a variety of products, such as the previously mentioned e-waste. Metal must be mined from the earth, which damages the area and environment those mines are dug. The good news is most metals can be recycled together as recycling plants will sort them for you. Some local businesses can recycle scrap metal for you as well if needed. Metals can be used for industrial purposes such as the manufacture of trucks, cars, airplanes, ships, and railways. They can also be used to manufacture domestic items such as cutlery, crockery and even in packaging. The good thing about metal recycling is that metal can be recycled over and over without altering its properties. The most common recyclable metals include aluminum and steel. The other metals, for example, silver, copper, brass and gold, are so valuable that they are rarely thrown away to be collected for recycling.

6.Batteries

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Technically batteries can be considered e-waste, and metal waste. The difference is batteries don’t go in the recycling bin OR the garbage bin. That doesn’t mean batteries can’t be recycled though. The chemicals that can leak out of them are extremely harmful to the planet, and can contaminate other waste that would otherwise be recyclable. Therefore they need to be recycled separately from all other forms of waste. The broken battery pieces go into a vat, where the lead and heavy materials fall to the bottom while the plastic rises to the top. At this point, the polypropylene pieces are scooped away and the liquids are drawn off, leaving the lead and heavy metals. Each of the materials then begins its own recycling journey. We’ll begin with the plastic, or polypropylene.

7.Tires

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Car tires and other commercial rubber materials found in various products are difficult to recycle. Unfortunately most rubber products are burned, even when they’re properly discarded. At the very least you can search for a recycling facility that specifically takes care of tires. They can retread the tire, or dispose of it in a way that won’t poison the Earth. Tires are meant for single use, typically lasting three to four years before their tread wears out. At the end of their lives, some are shredded and turned into artificial field turf or playground surfaces. But many end up burned or in landfills, releasing toxic chemicals into the air or leaching them into the ground.

8.Clothing

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Textile recycling is less common than one would hope, which is unfortunate for the environment because they take several hundred years to break down. To recycle clothing, check your local mall or retailers as they often have bins where you can donate your used and unwanted textiles. It involves recovering old clothing and shoes for sorting and processing. End products include clothing suitable for reuse, cloth scraps or rags as well as fibrous material. Interest in garment recycling is rapidly on the rise due to environmental awareness and landfill pressure. For entrepreneurs, it provides a business opportunity. In addition, various charities also generate revenue through their collection programs for old clothing.

9.Organic Materials

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Organic waste is actually good for the planet and rarely harms it. The environmental benefits of recycling is biodegradable waste in a specific container is worthwhile. Making compost is simple, all it requires is an organic waste bin and time. Organic wastes are materials originating from living sources like plants, animals, and microorganisms that are biodegradable and can be broken down into simpler organic molecules. The most common sources of organic wastes include agriculture, household activities, and industrial products. Green waste like food wastes, food-soiled paper, non-hazardous wood waste, landscape waste, and pruning wastes are some of the examples of biodegradable or organic wastes.

10.PPE & Medical Waste

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A few disposable masks lying around the neighbourhood which can be extremely harmful to wildlife. Recycling medical waste is much more expensive (especially red bag waste). Unfortunately, this higher price tag often means that recyclable materials get thrown out with regular trash anyway. Single-use personal protective equipment (from masks to gloves etc.) are hard to recycle in traditional recycling systems as they cost more for local recyclers to collect and process than the resulting materials are worth. The polypropylene-dominant mixture from the face mask is densified into a crumb-like raw material that’s used in plastic lumber and composite decking applications. The elastane or rubber band portion is ground into a fine mesh regrind and mixed with recycled plastics as an additive to provide flexibility and malleability to products. Gloves are processed into a rubberized powder which is used for flooring tiles, playground surface covers and even athletic fields. The resulting recycled material is used by third parties to manufacture a variety of new products including outdoor furniture, plastic shipping pallets, outdoor decking, watering cans, storage containers, bins, tubes for construction applications, etc.

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THE 10 GREAT STRONGEST METALS IN THE WORLD

A Metal is any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light. Approximately three-quarters of all known chemical elements are metals. The vast majority of metals are found in ores. Metals are usually crystalline solids. Metals have a relatively simple crystal structure distinguished by a close packing of atoms and a high degree of symmetry. From multi-level parking garages to skyscrapers amidst a bustling city, modern industrial processes need materials that are capable of withstanding a lot. On the hunt for strong materials, engineers turn to metals because of their strength, availability, and versatility. Strength of a metal depends on four properties like tensile strength, compressive strength, yield strength, and impact strength. In terms of tensile strength, tungsten is the strongest out of any natural metal (142,000 psi). Here are the 10 strongest metals in the world.

1.Tungsten

Tungsten W is found naturally on Earth almost exclusively as compounds with other elements. In terms of tensile strength, tungsten is the strongest out of any natural metal (142,000 psi).It has the highest melting point of all the elements discovered, melting at 3,422 °C (6,192 °F; 3,695 K). It also has the highest boiling point, at 5,555 °C (10,031 °F; 5,828 K). Tungsten is one of the toughest metals. But in terms of impact strength tungsten is weak. Its density is 19.25 grams per cubic centimeter. Pure single-crystalline tungsten is more ductile. Naturally occurring tungsten consists of four stable isotopes (182W, 183W, 184W, and 186W) and one very long-lived radioisotope, Tungsten also has 11 meta states.

Tungsten is a mostly non-reactive element with water and it is immune to attack by most acids and bases. It does not react with oxygen does not react to air at room temperature. The world’s reserves of tungsten are 3,200,000 tonnes; they are mostly located in China (1,800,000 t), Canada (290,000 t), Russia (160,000 t), Vietnam (95,000 t) and Bolivia. Tungsten is extracted from its ores in several stages. Tungsten is used in making Bullets and missiles. Tungsten is often used in electrical and military applications. Tungsten used in incandescent light bulb filaments, X-ray tubes, electrodes in gas tungsten arc welding, superalloys, and radiation shielding. Tungsten compounds are often used as industrial catalysts.

2.Steel

Iron is extracted from iron ore by removing the oxygen. While steel is technically an alloy rather than a metal, it is the strongest alloy currently available. Today, steel is one of the most common manmade materials in the world. The most important properties of steel are great formability and durability, good tensile and yield strength and good thermal conductivity. Very important stainless steel property is its resistance to corrosion. The Steel industry is often considered an indicator of economic progress. Steel is made from iron and carbon and is a highly versatile alloy. In its pure form, iron is soft and generally not useful as an engineering material. To strengthen it, converting it into steel by adding small amounts of carbon. Steel is possibly the most important engineering and construction material in the world. There are many measurement systems used to define the properties of a given steel. For example, Yield strength, ductility and stiffness are determined using tensile testing. Toughness is measured by impact testing; and hardness is determined by measuring resistance to the penetration of the surface by a hard object.

The relationship between stress and strain is a measure of the elasticity of the material, and this ratio is referred to as Young’s modulus. A high value of Young’s modulus is one of the steel’s most differentiating properties; it is in the range 190-210 GPa. The physical properties of steel are related to the physics of the material, such as density, thermal conductivity, elastic modulus, Poison’s ratio etc. It is used to fabricate everything from sewing needles to oil tankers. Because of its high tensile strength and low cost, steel is used in buildings, infrastructure, tools, ships, trains, cars, machines, electrical appliances, and weapons. On average, 50 percent of a car is made of steel. Steel is used in the production of farm vehicles and machines. Most of the appliances in modern homes, such as refrigerators, televisions, sinks, ovens and so on are made of “plain” steel.

  1. Chromium

Chromium Cr is the hardest metal. Chromium is a steely-gray lustrous, brittle, hard metal. It is known to have high corrosion resistance. When polished, it gains a very shiny surface, which is used to plate other metals. Chromium is also highly valued as a metal that is able to be highly polished while resisting tarnishing. It is poisonous in excess. Chromium is mined as chromite ore. Globally this ore is available in India, South Africa, Finland, Zimbabwe, Kazakihstan and the Philippines. The name of the element Chromium is derived from the Greek word chroma, meaning color. Chromium(VI) is a strong oxidising agent in contrast to the molybdenum(VI) and tungsten(VI) oxides. Chromium is extremely the third hardest element behind carbon (diamond) and boron. Chromium has a melting point of 1907 °C (3465 °F), which is relatively low compared to the majority of transition metals.

4.Titanium

Titanium Ti is one of the strongest metals out there, with an ultimate strength of more than 430 Megapascals. It is one of the least dense metals, making it an ideal option for industrial uses that require a strong metal with a high melting point. Titanium has excellent resistance to corrosion in seawater. Titanium is stronger than steel, lighter in weight. Titanium is widely distributed and constitutes 0.44 percent of Earth’s crust. The metal is found combined in practically all rocks, sand, clay, and other soils. Titanium is not attacked by mineral acids at room temperature or by hot aqueous alkali. Titanium readily reacts with oxygen at 1,200 °C (2,190 °F) in air, and at 610 °C (1,130 °F) in pure oxygen, forming titanium dioxide. Pure titanium is ductile, about half as dense as iron and less than twice as dense as aluminum; it can be polished to a high lustre.

A compound of titanium and oxygen was discovered (1791) by the English chemist and mineralogist William Gregor and independently rediscovered (1795) and named by the German chemist Martin Heinrich Klaproth. These alloys are mainly used in aircraft, spacecraft and missiles because of their low density and ability to withstand extremes of temperature. They are also used in golf clubs, laptops, bicycles and crutches. Power plant condensers use titanium pipes because of their resistance to corrosion. Titanium metal connects well with bone, so it has found surgical applications such as in joint replacements and tooth implants. It is extensively used as a pigment in house paint, artists’ paint, plastics, enamels and paper. It is also a good reflector of infrared radiation.

5.Iron

Iron Fe is also a brittle and hard substance. Iron dissolves in dilute acids. It rusts easily. It is the most important of all metals. It is the fourth most common element in the Earth’s crust. Iron is rare in the Earth’s crust, limited mainly to deposition by meteorites. 90% of all metal that is refined today is iron. Iron can form magnets or be attracted to magnets. Pure iron is quite reactive. Iron reacts readily with oxygen and water to give brown to black hydrated iron oxides, commonly known as rust. The body of an adult human contains about 4 grams of iron, mostly in hemoglobin and myoglobin. Both the Earth’s inner and outer core, that account for 35% of the mass of the whole Earth, are believed to consist largely of an iron alloy, possibly with nickel.

Iron is also found combined with other elements in hundreds of minerals; of greatest importance as iron ore are hematite, magnetite, limonite , pyrite, goethite and siderite . The metal is extracted by smelting with carbon and limestone. People have been using iron for more than 5,000 years. In a very finely divided state metallic iron is pyrophoric. It is used in architecture, bearings, cutlery, surgical instruments and jewellery. Iron is Used to make bridges, electricity, pylons, bicycle chains, cutting tools and rifle barrels. Cast iron is used for pipes, valves and pumps. Iron is used in numerous sectors such as electronics, manufacturing, automotive, and construction and building.

6.Vanadium

In 1801, vanadium was discovered by Andres Manuel del Rio. It has good corrosion resistance, high strength at high temperature, and low density. Vanadium V has high resistance to alkalis, hydrochloric and sulfuric acids. It is found in different kinds of mill forms. It has high hardness when compared to most of the steels and metals. At a temperature of about 660°C, vanadium can be easily oxidized in air. It should be prevented from being exposed outside because it can react with oxygen and nitrogen gases. It is produced in China and Russia from steel smelter slag. Vanadium can be welded using TIG welding method if argon or helium is covered at front and back of a work piece.

About 80% of the vanadium produced is used as a steel additive. Vanadium-steel alloys are used for piston rods, armour plate, tools, crankshafts, axles. The vanadium redox battery for energy storage may be an important application in the future. Vanadium(V) oxide is used as a pigment for ceramics and glass, as a catalyst and in producing superconducting magnets. It is usually found in carbon containing deposits that include coal, tar sands, oil shale and crude oil. Vanadium is mainly applied in parts having low density, good low temperature ductility, high strength at high temperatures, and good corrosion resistance in bad environments. It is used in jet engines, air frames, nuclear reactors and gears etc.

7.Lutetium

Lutetium Lu is a silvery white metal, which resists corrosion in dry air, but not in moist air. The lutetium atom is the smallest among the lanthanide atoms, due to the lanthanide contraction. Lutetium has the highest density, highest melting point, and hardness of the lanthanides. It is found with almost all other rare-earth metals. Lutetium is very difficult to separate from other elements. It reacts slowly with water, but dissolves rapidly in acids. Lutetium was independently discovered in 1907 by French scientist Georges Urbain, Austrian mineralogist Baron Carl Auer von Welsbach, and American chemist Charles James. Lutetium usually occurs in association with the element yttrium. It burns readily at 150 °C to form lutetium oxide. Lutetium dissolves readily in weak acids. Lutetium, derived from the Latin Lutetia. It is sometimes used in metal alloys. Lutetium has the highest Brinell hardness of any lanthanide. Lutetium has a concentration of around 0.8 to 1.7 ppm in the Earth’s crust.

It is estimated that nearly 0.03% of lutetium is present in monazite ores. It is used as catalysts in petroleum production and used in polymerization and alkylation. It is used for cracking hydrocarbons. It is used in detectors of positron emission topography that detects cellular activity of the body. It is used in cancer treatment. Lutetium aluminium garnet has been proposed for use as a lens material in high refractive index immersion lithography. It is also used in magnetic bubble memory devices and light-emitting diode light bulbs. Lutetium-177 used as a radionuclide in neuroendrocine tumor therapy and bone pain palliation. Lutetium is considered to be one of the toxic metals. Hence inhalation of this compound is very dangerous as it might lead to fatal conditions. Some skin disorders can occur if we contact with Lutetium.

  1. Zirconium

Zirconium chemical element Zr is extremely resistant to heat and corrosion. Gems that contain zirconium were known in ancient times as zircon. Zircon is a natural semi-precious gemstone found in a variety of colors. Zirconium is lighter than steel and its hardness is similar to copper. Zirconium does not dissolve in acids and alkalis.
Zirconium is a very strong, malleable, ductile, lustrous silver-gray metal. It is solid at room temperature. In powder form, zirconium is highly flammable, but the solid form is much less prone to ignition. The melting point of zirconium is 1855 °C (3371 °F), and the boiling point is 4371 °C (7900 °F).
Zirconium occurs in about 30 mineral species. More than 1.5 million tonnes of zircon are mined each year, mainly in Australia, South Africa and Sri Lanka . Most baddeleyite is mined in Brazil. In 1789, the German chemist, Martin Klaproth analysed a zircon and separated zirconium in the form of its ‘earth’ zirconia, which is the oxide ZrO2.

For the Ancient Egyptians the scarab beetle was a symbol of regeneration and creation, conveying ideas of transformation, renewal and resurrection. The Ancient Egyptians used zircon gemstones in jewellery. Zirconium does not absorb neutrons, making it an ideal material for use in nuclear power stations. Space and aeronautic industries use Zirconium to manufacture high-temperature parts like blades, combustors, and vanes in jet engines. In photographic flashbulbs and surgical instruments, to make the glass for television, in the removal of residual gases from electronic vacuum tubes, and as a hardening agent in alloys, especially steel.
It is extensively used by the chemical industry. Zirconium(IV) oxide is used in ultra-strong ceramics. Scissors and knives can be made from it. It is also used in antiperspirants, cosmetics, food packaging and to make microwave filters. With niobium, zirconium is superconductive at low temperatures and is used to make superconducting magnets. Baddeleyite and impure zirconium (zirconia) are used in lab crucibles.

  1. Osmium

Osmium chemical element Os is a shiny, silver metal that resists corrosion. It is the densest of all the elements and is twice as dense as lead. Of the platinum metals it has the highest melting point, so fusing and casting are difficult. Osmium is un effected by water and acids, but dissolves with molten alkalis.
Most osmium is obtained commercially from the wastes of nickel refining. Osmium is a rare element and found in the Earth’s crust. It is difficult to fabricate. In 1803AD, Osmium was discovered by Smithson Tennant when dissolving an impure sample of platinum in aqua regia, a mixture of hydrochloric and nitric acids.

It is also a member of the platinum group metals or PGMs (along with Ruthenium, Rhodium, Palladium, Iridium and Platinum) as well as being a transition metal. The name Osmium is derived from the Greek word Osme, which means odor. The largest known primary reserves of osmium include South Africa and Canada. It is added to platinum or indium to make them harder. It is used to produce very hard alloys for fountain pen tips, instrument pivots, needles and electrical contacts. It is also used in the chemical industry as a catalyst. It is used in making high-quality pen nibs, compass needles, long-life gramophone needles and clock bearings. Osmium tetroxide, OsO4, is highly toxic. Concentrations in air as low as 10-7 g m-3 can cause lung congestion, skin damage, and severe eye damage.

10.Tantalum

Tantalum Ta appears as a shiny and silvery metal in its soft and pure form but Tantalum is in the form of hard, rare, blue-grey, lustrous metal. It is highly conductive of heat and electricity. It shows excellent resistance to all acids in normal temperature. This metal is corrosion resistant and is bound to chemical attack below 150 C. It has a high melting point of about 3017 °C and a boiling point of about 5458 °C. The chemical inertness of tantalum makes it a valuable substance for laboratory equipment, and as a substitute for platinum. Tantalum was discovered in Sweden in 1802 by Anders Ekeberg, in two mineral samples one from Sweden and the other from Finland. The name tantalum was derived from the name of the mythological Tantalus, the father of Niobe in Greek mythology. Tantalum carbide, TaC, like the more commonly used tungsten carbide, is a hard ceramic that is used in cutting tools.

Tantalum causes no immune response in mammals, so has found wide use in the making of surgical implants. It can replace bone, for example in skull plates; as foil or wire it connects torn nerves; and as woven gauze it binds abdominal muscle. Tantalum alloys can be used for turbine blades, rocket nozzles and nose caps for supersonic aircraft. It is employed in the manufacture of capacitors. Used as an alloy due to its high melting point and anti-corrosion. It is used mainly as an alloying medium as it is helpful for hardening metals. It is utilized in the chemical industries. It has a high number of medical as well as dental applications. Tantalum causes many health-related problems such as irritation of the skin and eye when inhaled, ingested or when it gets absorbed into the skin.

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THE 10 GREAT MOST PRECIOUS METALS IN THE WORLD

A Metal is any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light. Approximately three-quarters of all known chemical elements are metals. The vast majority of metals are found in ores. Metals are usually crystalline solids. Metals have a relatively simple crystal structure distinguished by a close packing of atoms and a high degree of symmetry. Precious metals are metals that are rare and have a high economic value, due to various factors, including their scarcity, use in industrial processes, and role throughout history as a store of value. The single most popular precious metal for investment purposes is gold, followed by silver. Investors purchase precious metals mainly as a financial asset. The most popular precious metals with investors are gold, platinum, and silver. Here are the 10 most precious metals in the world.

  1. Rhodium

Rhodium is a rare, silvery-white, hard, corrosion-resistant chemical element . Rhodium is a member of the platinum group. Rhodium is one of the of the six platinum group metals: platinum, palladium, rhodium, osmium, iridium and ruthenium. It is chemically inert transition metal. It is one of the most valuable precious metals. It was discovered in 1803 by William Hyde Wollaston. Rhodium has both a higher melting point and lower density than platinum. Rhodium is one of the rarest elements in the Earth’s crust. It is mostly mined from Russia, South Africa and Canada. Rhodium it is unaffected by air and water up to 1,112 degrees Fahrenheit (600 degrees Celsius), according to Lenntech. It does not react to oxygen easily. It occurs up to one part per 200 million in the Earth’s crust, according to Chemistry Libretexts.

The primary use of this element is in automobiles as a catalytic converter, changing harmful unburned hydrocarbons, carbon monoxide, and nitrogen oxide exhaust emissions into less noxious gases. Pure rhodium is inert and harmless in elemental form. Rhodium detectors are used in nuclear reactors to measure the neutron flux level and used to form drug precursors and the processes for the production of acetic acid. It is used as an alloying agent for hardening and improving the corrosion resistance of platinum and palladium. It is used for its reflective surfaces in search lights, mirrors and jewellery finish, giving everything it touches a lovely shine. It is also used in electric connections and is alloyed with platinum for aircraft turbine engines.

  1. Platinum

Platinum is one of the rare elements in Earth’s crust. Platinum is a dense, malleable, ductile, element. This is highly unreactive, silverish-white transition metal. It is highly precious metal commodity and it is one of the least reactive metals. It occurs mostly in South Africa, which accounts for 80% of the world production. It occurs naturally in the alluvial sands of various rivers, it was first used by pre-Columbian South American natives to produce artifacts. Mostly used for a lot of weapons, aeronautics and dentist equipment due to its high level of resistance.

Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. Compounds containing platinum, such as cisplatin, oxaliplatin and carboplatin, are applied in chemotherapy against certain types of cancer. Platinum is often found chemically uncombined as native platinum and as alloy with the other platinum-group metals and iron mostly. It has various applications in photography, zinc etchings, indelible ink, plating, mirrors, porcelain coloring. This highly malleable metal is incredibly resistant to corrosion and sought after for its metallic shine and lustrous look.

  1. Gold

Gold is one of the least reactive chemical elements and it occurs naturally. Gold is available in free elemental form, as nuggets or grains, in rocks, in veins, and in alluvial deposits. Gold is a chemical element with dense, soft, malleable, and ductile metal. It is a good conductor of heat and electricity. It was one of the first metals to attract human attention. Because of its unique qualities, gold has been the one material that is universally accepted in exchange for goods and services. Most mined gold is stored as bullion. The term ‘carat’ indicates the amount of gold present in an alloy. 24-carat is pure gold, but it is very soft. 18- and 9-carat gold alloys are commonly used because they are more durable. It is a bright, slightly reddish yellow in color. This color is determined by the frequency of plasma oscillations among the metal’s valence electrons. The world consumption of new gold produced is about 50% in jewelry, 40% in investments, and 10% in industry. It has emotional, cultural and financial value and different people across the globe buy gold for different reasons.

Gold is a precious metal that has been used for coinage, jewelry, and other arts. Gold’s resistance to corrosion and also used in infrared shielding, colored-glass production, gold leafing, and tooth restoration. Certain gold salts are still used as anti-inflammatories in medicine. It is usually found in nature in a comparatively pure form. Gold is used in art, for decoration and as architectural ornament. This is used in gears for watches, artificial limb joints. It is ideal for protecting electrical copper components because it conducts electricity well. A gold compound is used to treat some cases of arthritis. The metal remains a highly regarded reserve asset, and approximately 45 percent of all the world’s gold is held by governments and central banks for this purpose. About 1500 tonnes of gold are mined each year. About two-thirds of this comes from South Africa and most of the rest from Russia. A total of 197,576 tonnes of gold exists above ground, as of 2019.

  1. Ruthenium

Natural ruthenium consists of a mixture of seven stable isotopes. It is a hard, white transition metal. Russian-born scientist of Baltic-German ancestry Karl Ernst Claus discovered this element in 1844 at Kazan State University. Ruthenium is generally found in ores with the other platinum group metals in the Ural Mountains and in North and South America. Silver-grey ruthenium metal looks like platinum but is rarer, harder, and more brittle. Ruthenium is a chemical element and is inert to most other chemicals. The composition of the mined platinum group metal (PGM) mixtures varies widely, depending on the geochemical formation. For example, the PGMs mined in South Africa contain on average 11% ruthenium while the PGMs mined in the former USSR contain only 2%. Ruthenium, like the other platinum group metals, is obtained commercially as a by-product from nickel, and copper, and platinum metals ore processing. Because of its high melting point, ruthenium is not easily cast; its brittleness, even at white heat, makes it very difficult to roll or draw into wires.

It is used in some jewellery as an alloy with platinum. Most ruthenium produced is used in wear-resistant electrical contacts and thick-film resistors. During electro refining of copper and nickel, noble metals such as silver, gold, and the platinum group metals precipitate as anode mud, the feedstock for the extraction. Most is used in the electronics industry for chip resistors and electrical contacts. Ruthenium oxide is used in the chemical industry to coat the anodes of electrochemical cells for chlorine production. Ruthenium is also used in catalysts for ammonia and acetic acid production. Ruthenium compounds can be used in solar cells, which turn light energy into electrical energy. The industrial application of metallic ruthenium is restricted to use as an alloy for platinum and other metals of the platinum group. Roughly 30 tonnes of ruthenium are mined each year.

  1. Iridium

Iridium also has the highest density of all the elements. Iridium is not affected by acids, bases, or most other strong chemicals. Iridium is the most corrosion-resistant element even at temperatures as high as 2000 °C (on the Periodic Table of Elements). It is very rare and is used in platinum alloys. A precious, silver-white metal, iridium is hard and brittle, but it becomes ductile and can be worked at a white heat, from 1,200°. Iridium is found in meteorites in much higher abundance than in the Earth’s crust. It is one of the densest terrestrial substances. Iridium is considered to be the second-densest metal. Iridium’s modulus of elasticity is the second-highest among the metals. Iridium was discovered in 1803 among insoluble impurities in natural platinum. Smithson Tennant, the primary discoverer, named iridium.

Iridium is one of the rarest elements in Earth’s crust, with annual production and consumption of only three metric tons. The most important iridium compounds in use are the salts and acids it forms with chlorine, though iridium also forms a number of organo metallic compounds used in industrial catalysis, and in research. A member of the platinum group metals, iridium is white, resembling platinum, but with a slight yellowish cast. Because of its hardness, brittleness, and very high melting point, solid iridium is difficult to machine, form, or work. It is the only metal to maintain good mechanical properties in air at temperatures above 1,600 °C (2,910 °F). It used for pen tips and compass bearings. It was used in making the standard metre bar, which is an alloy of 90% platinum and 10% iridium. It is also used for the contacts in spark plugs because of its high melting point and low reactivity.

  1. Osmium

A gray-white metal, osmium is very hard, brittle, and difficult to work, even at high temperatures. It is the densest naturally occurring element. Pure osmium metal does not occur in nature. British chemist Smithson Tennant discovered osmium in 1803 in the residue left when crude platinum was dissolved by aqua regia. It is a bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. The element’s abundance in the Earth’s crust is among the rarest, with an abundance of only 50 ppt in the earth’s crust. It is approximately twice as dense as lead and slightly denser than iridium. It has a very low compressibility. Of the platinum metals it has the highest melting point, so fusing and casting are difficult. Osmium has seven naturally occurring isotopes, six of which are stable.

Osmium powder reacts slowly with the oxygen of the air and gives off detacteble amounts of osmium tetroxide vapour. Osmium is mainly found alloyed with other platinum metals, from which it is recovered commercially. The most important ores are either iridosmine and osmiridium. Iridosmine is a rare mineral found in Russia and in North and South America. It is used to produce very hard alloys for fountain pen tips, instrument pivots, needles and electrical contacts. It is also used in the chemical industry as a catalyst. Osmium wires were used for filaments of early incandescent lamps before the introduction of tungsten. Osmium tetroxide, OsO4, is highly toxic concentrations in air as low as 10-7 g m-3 can cause lung congestion, skin damage, and severe eye damage.

  1. Palladium

Palladium is unique in its ability to absorb hydrogen and very malleable element. It is a rare and lustrous silvery-white metal discovered in 1803 by the English chemist William Hyde Wollaston. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). They have similar chemical properties. Palladium has the lowest melting point and is the least dense of them. Palladium is a key component of fuel cells, which react hydrogen with oxygen to produce electricity, heat, and water. Russia was the top producer with 82,000 kilograms, followed by South Africa, Canada and the U.S. Russia’s company Norilsk Nickel ranks first among the largest palladium producers globally, accounting for 39% of the world’s production. More than half the supply of palladium and its congener platinum is used in catalytic converters, which convert as much as 90% of the harmful gases in automobile exhaust into less noxious substances.

Palladium is also used in electronics, dentistry, medicine, hydrogen purification, chemical applications, groundwater treatment, and jewelry. Palladium is used in small amounts (about 0.5%) in some alloys of dental amalgam to decrease corrosion and increase the metallic lustre of the final restoration. Palladium heated to 800 °C will produce a layer of palladium(II) oxide (PdO). Palladium is also used watch making, blood sugar test strips, aircraft spark plugs, surgical instruments, and electrical contacts. Palladium is also used to make professional transverse flutes. Palladium can be used for component and connector plating in consumer electronics and in soldering materials. Unlike platinum, palladium may discolor at temperatures above 400 °C (752 °F) due to oxidation, making it more brittle and thus less suitable for use in jewelry.

  1. Rhenium

Rhenium is a silvery-white metal with one of the highest melting points of all elements, exceeded by only tungsten and carbon. It also has one of the highest boiling points of all elements, and the highest among stable elements. Rhenium is extremely hard and a heavy metal. Rhenium is one of the rarest elements in the Earth’s crust. Rhenium has the third-highest melting point and second-highest boiling point of any stable element at 5903 K. Rhenium is expensive, with price reaching an all-time high. Rhenium has a hexagonal close-packed crystal structure. Rhenium does not occur free in nature or as a compound in any distinct mineral; instead it is widely distributed in small amounts in other minerals, usually in concentrations averaging about 0.001 parts per million. It resists wear and corrosion very well. Rhenium was discovered in 1908 and it is the second-last stable element to be discovered. The isolation of rhenium was finally achieved in May 1925 by Walter Noddack and Ida Tacke working in Berlin.

Rhenium was the second last-discovered of the elements that have a stable isotope. It is used in the combustion chambers, turbine blades, and exhaust nozzles of jet engines. These alloys contain up to 6% rhenium, making jet engine construction the largest single use for the element. The second-most important use is as a catalyst: rhenium is an excellent catalyst for hydrogenation and isomerization, and is used for example in catalytic reforming of naphtha for use in gasoline. These alloys are used for oven filaments and x-ray machines. It is also used as an electrical contact material as it resists wear and withstands arc corrosion. Rhenium catalysts are used for the hydrogenation of fine chemicals. Some rhenium is used in nickel alloys to make single-crystal turbine blades. It is used on filaments, electronic casings and often comes as by-product of copper mining.

  1. Silver

Silver is a relatively soft, shiny metal. It tarnishes slowly in air as sulfur compounds react with the surface forming black silver sulfide. Silver is a white, lustrous transition metal. It exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Silver has long been valued as a precious metal. The metal is found in the Earth’s crust in the pure, free elemental form, as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining. It is probable that both gold and silver were used as money by 800 BCE in all countries between the Indus and the Nile. This metal constitutes 0.05 part per million of Earth’s crust. Silver is found generally in lead ores, copper ores, and cobalt arsenide ores and is also frequently associated with gold in nature. Silver also contain the important metals lead, copper, or zinc or a combination of the three. Alloys of silver with copper are harder, tougher, and more fusible than pure silver and are used for jewelry and coinage.

Silver has antibacterial properties and silver nanoparticles are used in clothing to prevent bacteria from digesting sweat and forming unpleasant odours. Silver is used in solar panels, water filtration, jewellery, ornaments, high-value tableware and utensils, in electrical contacts and conductors, in specialized mirrors, window coatings, in catalysis of chemical reactions, as a colorant in stained glass and in specialised confectionery. Its compounds are used in photographic and X-ray film. Silver also finds use as a catalyst for its unique ability to convert ethylene to ethylene oxide, which is a precursor of many organic compounds. Silver is used to make mirrors, as it is the best reflector of visible light known. It is also used in dental alloys, solder and brazing alloys, and batteries. Silver paints are used for making printed circuits. Silver threads are woven into the fingertips of gloves so that they can be used with touch screen phones.

  1. Indium

Indium is a soft, ductile, malleable, lustrous metallic metal with silvery white color which is used in the semiconductor industry, in low-melting- point metal alloys such as Lead-free solders. It is stable in air and water. Indium is named after the bright indigo line in its spectrum. Our Indium products include indium ingot, indium granules, indium foil, indium wire, indium coin, Indium Ribbon, indium oxide etc. It is not an alkali metal. It is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. Indium was discovered in 1863 by Ferdinand Reich and Hieronymous Theodor Richter by spectroscopic methods. Indium is a minor component in zinc sulfide ores and is produced as a byproduct of zinc refinement. Indium is considered a technology-critical element. The density of indium, 7.31 g/cm3, is also greater than gallium, but lower than thallium. Indium Foil is made by pure Indium Ingot which is very soft and shapable metal. Indium foil has great thermal conductivity.

Indium is produced exclusively as a by-product during the processing of the ores of other metals. Its main source material are sulfidic zinc ores. Minor amounts are probably also extracted from sulfidic copper ores. The primary consumption of indium worldwide is LCD production. Popularity of LCD computer monitors and television sets, which now account for 50% of indium consumption. The first large-scale application for indium was coating bearings in high-performance aircraft engines to protect against damage and corrosion. Now it can be found in fusible alloys, solders, and electronics. Indium(III) oxide and indium tin oxide (ITO) are used as a transparent conductive coating on glass substrates in electroluminescent panels. Indium nitride, phosphide and antimonide are semiconductors used in transistors and microchips. An indium alloy has been used for fire-sprinkler systems in shops and warehouses because of its low melting point. People can be exposed to indium in the workplace by inhalation, ingestion, skin contact, and eye contact leads to lung disease.

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