ENVIRONMENTAL BIOLOGY AND PATHOPHYSIOLOGY OF CADMIUM

Y. Çotuk, M. Belivermiş, Ö. Kılıç
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引用次数: 11

Abstract

Cadmium (Cd) is a soft, silver-white metal being together with zinc and mercury in group II b in the periodic table. It's melting and boiling point are 320.9 0 C and 765 0 C, respectively. Cd is rapidly oxidized into cadmium oxide in the air. When reactive gases such as carbon dioxide, sulphur dioxide, sulphur trioxide and hydrogen chloride or water vapour are present in the air, cadmium vapour reacts to produce cadmium carbonate, cadmium sulphite, cadmium sulphate, cadmium chloride or cadmium hydroxide. These compounds may be formed in chimneys and emitted into the environment. It is indicated that zinc-bearing coals of the central United States and carboniferous age coals of other countries contain large sub economic resources of cadmium. Although some cadmium compounds such as acetate, chloride and sulphate are soluble in water; cadmium oxide, carbonate and sulphide are insoluble.
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镉的环境生物学和病理生理学
镉(Cd)是一种柔软的银白色金属,与锌和汞一起在元素周期表中属于b族。它的熔点和沸点分别是320.9℃和765℃。镉在空气中迅速氧化成氧化镉。当空气中存在二氧化碳、二氧化硫、三氧化硫和氯化氢或水蒸气等反应性气体时,镉蒸气会发生反应,产生碳酸镉、亚硫酸镉、硫酸镉、氯化镉或氢氧化镉。这些化合物可能在烟囱中形成并排放到环境中。结果表明,美国中部的含锌煤和其他国家石炭时代的煤含有大量的镉亚经济资源。虽然有些镉化合物如醋酸盐、氯化物和硫酸盐可溶于水;氧化镉、碳酸盐和硫化物是不溶的。
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