【摘要】 用Tessier连续提取法测定了包头地区土壤中重金属Cu,Zn,Pb和Cd的形态分布及,环境意意义。结果显示:包头地区土壤中重金属主要以Fe-Mn氧化态.有机结合态和残留态形式存在,生物有效性小。Cu,Pb主要以Fe-Mn氧化态,有机结合态,残留态存在;Cd,Zn主要以有机结合态和残留态存在;而Zn的可交换态,碳酸盐态占比例也较大,为24%,因此具有一定的生物有效性和潜在生态危害。各重金属的生物有效性和潜在生态危害性顺序为Zn>Cd>Cu>Pb。更多还原

【Abstract】 Tessier method of extracting substance successively was applied to determine the concentrations of heavy metals—Cu,Zn,Pb and Cd. Environmental significance of the heavy metals in the soil were discussed. Results showed that the heavy metals in the soil mainly existed in the forms of Fe-Mn Oxide,organic combination,and residual. Cu and Pb were mainly in Fe-Mn Oxide,organic combination,and residual forms;Cd and Zn were mainly in the states of organic combination and residual;the exchange state and carbonate take up a relatively large proportion for Zn,which was 24%,therefore,it exhibits both biological availability and potential ecological risks to some extent. The order of biological availability and potential ecological risks of the heavy metals is Zn>Cd>Cu>Pb.更多还原