分别向自然条件重金属污染底泥和人工污染重金属污染底泥中添加2种稳定化剂，进行熟化试验和浸出毒性试验，研究膨润土和硅藻土对高、低浓度重金属污染底泥的稳定化效果。结果表明，在一个试验周期内，膨润土和硅藻土对自然条件重金属污染底泥中重金属Cu、 Pb、 Cr均具有稳定化效果，且对Pb和Cr的抑制能力相似；膨润土和硅藻土对人工污染重金属污染底泥中重金属Cu和Pb的释放具有明显抑制效果，而硅藻土对Cr的释放具有一定抑制作用。%Bentonite and diatomite, as the stabilizers on heavy metals, were mixed with natural river sedi-ment and artificial-contaminated sediment separately, and then, curing test and leaching toxicity test on the two groups of sediments with low-concentration and high-concentration heavy metals were carried out, the effect of bentonite and diatomite on the immobilization of heavy metals in polluted river sediment were studied. The re-sults indicated that, during one experiment period, both bentonite and diatomite showed stabilization effect on Cu Pb, Cr in natural river sediment, and their inhibiting ability on Pb and Cr was similar. Regarding to artificial-contaminated sediment, the above two kinds of stabilizers both expressed obvious inhibiting ability on Cu and Pb, while Cr was immobilized by diatomite only.
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