Heavymetalcontamination is extremely harmful in soil contamination. It is one of the research priorities in the world to control and remedy heavymetalcontamination.
重金属污染是土壤污染中危害极大的一类，重金属污染的防治及其修复是目前国际上研究的热点之一。
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The heavymetalcontamination of urban soil in China is caused by industrial pollutant discharge, metal mining and smelting, family coal combustion, rubbish exudation and vehicle emission.
Environmental and farm produce contamination by toxic heavymetal has become a major safety problem for human. Therefore rapid determination of heavy metal residue urgently required.