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环境中的铬主要以三价和六价态存在,六价铬的毒性比三价铬大。天然水中的三价铬和六价铬可以相互转化,土壤中的铬通常以三价态的Cr~(+3)阳离子及CrO~-_2的阴离子和
Chromium in the environment mainly exists in trivalent and hexavalent forms, and hexavalent chromium is more toxic than trivalent chromium. Trivalent chromium and hexavalent chromium in natural water can be transformed into each other. Chromium in the soil usually takes the trivalent Cr ~ (+3) cation and CrO ~ -_2 anion and