改良剂对重金属复合污染土壤的钝化修复研究

Research on Amendments Application in Remediation of Soil Contaminated with Mixed Heavy Metals

研究了泥炭、凹凸棒土及不同施用方式对土壤重金属有效态的影响。结果表明:各处理对土壤溶液的pH值影响不大;泥炭的钝化效果明显比凹凸棒土好,但在和凹凸棒土配合施用后,其钝化效果有所下降,而表施处理对DTPA提取态重金属的钝化效果并不明显。

Using incubation method,the effects of peat and palygorskite with different application method on availability of heavy metals were studied.The results showed that the amendments had slight impact on pH of soil solution.Peat was more effective than palygorskite in decreasing DTPA extractable content of heavy metals,but its effect was significantly weakened when combination with palygorskite.Surface application had no significant effect on availability of heavy metals.