By Chisom Ibemere
Cadmium is a soft, malleable, bluish white metal that occurs in zinc ores, and in the cadmium mineral greenockite in minute amount. It was discovered in 1817 by Friedrich Stromeyer, a German chemist.
The name is derived from the Latin word “cadmia,” meaning calamine. It initially occurs as an impurity in zinc carbonate ores.
Cadmium is a rare element in the Earth’s crust which occurs as a minor component in zinc, lead, and copper ores. The largest production of cadmium globally occurs in China, South Korea, Japan, and Canada.
Cadmium is commonly used in portable electronic devices, power tools, and industrial applications. Compounds such as cadmium sulfide and cadmium selenide, are used in pigments in various applications, including paints, plastics, ceramics, and textiles.
Its coatings provide resistance to corrosion, particularly in aerospace and automotive industries.
Cadmium is soft and is malleable and ductile. It is relatively resistant to corrosion but can slowly oxidize in moist air. Cadmium and its compounds are toxic and can accumulate in plants, animals, and human tissues, leading to health and environmental concerns.
The global value of cadmium is primarily influenced by its demand in various industries and the overall supply. Due to its toxicity, cadmium’s usage and production have been regulated to minimize its impact on health and the environment.