Copper is an old and young metal.
Copper has been a part of the history of human civilization.
April 12, 1961 Soviet cosmonaut Gagarin first spacecraft around the Earth successfully. July 20, 1969, the United States astronauts Neil Armstrong and Edwin Aldrin by the "Apollo 11" spacecraft for the first time on the moon successfully. Moon.
Copper alloy has become an important material for mankind to explore the mysteries of the universe. Today, single-crystal copper, nano-copper, superconducting copper, copper-based alloys ... mankind continues to carry out extensive research and development and use of copper metal.
Copper is the patron saint of human life. Copper can stimulate the activity of cytochrome oxidase, ascorbic acid oxidase and other enzymes, maintain the normal metabolism of iron, and help the synthesis of hemoglobin and the maturation of red blood cells. The amount of copper in an adult's body is 1.7 mg/liter, which means that a person weighing 60 kilograms has roughly 100 mg of copper in his or her body.
Copper is harmless to humans, and even if large amounts are ingested, it is rapidly eliminated from the body through excretion. If insufficient supplementation occurs, copper deficiencies such as anemia, stunting, dysentery, hypothermia, decreased skin and hair pigmentation, and bone lesions can occur.
In ancient times, copper promoted the development of society; in modern times, with the progress of human civilization, new uses of copper are constantly being discovered and recognized. Whether now or in the future, copper will be with us, copper will make our life better.
Copper is one of the most useful and valuable natural resources in the world, and is a great gift from nature to mankind. The Book of Han - Ruling and Calendar Zhi: "Copper is the essence of the thing, not for the dryness, humidity, heat and cold to change its section, not for the wind and rain exposure to change its shape." Copper's characteristics have long been recognized by the people of the country.
Copper, is a tough, soft, ductile rose-red and shiny metal. Density 8.92 g/cm3, melting point 1083.5 degrees, atomic number 29, atomic weight 63.546. copper content in the earth's crust in the 22nd; copper has two natural stable isotopes: copper 63 and copper 65.
Copper is 100% recyclable. The electrochemical properties of copper are second only to gold, platinum and silver, and are not easily oxidized. Pure copper at room temperature in carbon dioxide wet air, the surface will produce a green film CuCO3Cu (OH) 2 (alkaline copper carbonate, also known as copper green), which ensures that the copper is no longer corroded. As a result, 80% of all mined copper in the world is currently in use, and more than 40% of the total annual copper use is reused through recycling.
It is well known that unclean drinking water is a major cause of infectious disease epidemics. Many germs, such as E. coli and pneumococcus, can easily grow in water, and people can become ill after drinking contaminated water. As early as 1983, the famous Swiss botanist Negri found a trace of copper mixed with the water has an amazing bactericidal effect, this effect is also known as the role of trace, very small role, as long as the use of a small amount of copper will be able to kill microorganisms in the water and algae aquatic organisms.
Expert research has pointed out that the bacteriostatic mechanism of copper has two main aspects: one is the contact reaction, copper ions and bacteria contact reaction, resulting in the destruction of microorganisms inherent intrinsic components or produce dysfunction; the second is the photocatalytic reaction, under the action of light, copper ions can play a role as a catalyst for the role of the center of activity, activation of the water and the air in the oxygen produced by the delivery of hydroxyl radicals free and activated oxygen ions, a short period of time to destroy the bacterial proliferation capacity, and make the cell death, so as to achieve the purpose of bacterial inhibition.
