不同来源重金属在土壤中的形态分布差异

Fractionation of Pb. Zn and Cd in three polluted soils andtheir residues in soybean.

试验表明：不同来源的Ｐｂ、Ｚｎ和Ｃｄ复合污染物在土壤中的形态分布有明显的差异，在废矿水和尾矿砂污染的土壤中，Ｐｂ、Ｚｎ和Ｃｄ主要以残渣态存在，而添加土壤中的Ｐｂ主要以弱专性吸附态和有机结合态存在，Ｚｎ和Ｃｄ主要以交换态存在，大豆苗对添加土壤中Ｐｂ、Ｚｎ和Ｃｄ的富集能力较强，而对废矿水污染和尾矿砂污染土壤中Ｐｂ、Ｚｎ和Ｃｄ的富集能力相对较弱。

The pot experirments showed that the distribu-tion of pb,Zn,and Cd in three polluted soils were obviouslydifferent. In ore tailing particle of mine drainage pollut soils ,the majorities of Pb,Zn,and Cd were found to be in residualfraction, But in soil adding heavy Tnetals, most of Pb wasweak acid extractable or bound to organic matter and the ma-jority of Zn or Cd was exchangable,Soybean seedlings biocon-centrate Zn or Cd more powerful in soil adding pollutants than that in ore tailing particle and mine drainage pollution soils .