Cadmium is a chemical element, symbol Cd and atomic number 48. Is a relatively rare transition metal, soft, light blue and white have toxicity. Cadmium exist in inferior ore and was mainly used in the batteries.Cadmium comes into the human body through smoking, diet also contributes to put cadmium in the body. Cadmium causes the harmful effects as kidney toxicity, chronic liver poisoning, blood poisoning, intoxication in the immune system, bone toxicity. Although Cd toxicity can occur for a number of crops on soil pollution, but the accumulation of it in food crops cause toxic reactions are extremely large sign problem related to the deadly hazards risk due to favors, food poisoning.Research and learn the rules of its transformation in the environment is a complex problem. It depends on many factors in the environment and the disposal of cleaning Cd in soil is very difficult and costly so that the preventive measures from the beginning to limit the pollution of Cd in the environment.
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