摘要
为实现重金属污染土壤的修复 ,本文讨论了土壤有机态Cd转 (活 )化的影响因子及其综合作用。根据统计学的判别分析发现 :EM菌为其主导影响因子 ,而非以往形态转化研究中所说的pH ,其作用机制可能主要是生物降解 ;就影响因子的综合作用效果而言 ,在有机态Cd向活化态Cd转化中 ,有效的处理组合是随着土壤 pH的改变而变化的 :pH 6.5时 ,以EM菌 1%、C/N 2 0为最佳。pH 7.0时 ,以EM菌 1%、C/N =3 5为最宜。pH 7.5时 ,EM菌 3 %、C/N =3 5才最适 ;本研究条件下有机态Cd减少和活性态Cd增加的协同转化率为 11.5 %。
The factors that could influence the organic cadmium transformation were discussed in order to remediate the soil contaminated by heavy metals. Base on the statistic data, it was showed that EM bacterium was the most important factor rather than to pH. The mechanism was the process of biological degradation. The concentration of EM and C/N ratio added to soil increased with the rising of pH. The cooperative transformation rate was 11.5% with the decreasing of organic cadmium and the increasing of dissociate cadmium under the test condition. The results could provide the soil remediation with the basic theory.
出处
《土壤通报》
CAS
CSCD
北大核心
2002年第1期57-60,共4页
Chinese Journal of Soil Science
基金
国家 973(G1 9990 1 1 80 8- 5)项目
中科院重大 (KZ951 -BL - 2 0 7- 0 1 - 0 3)项目研究内容
