无机稳定剂对重金属污染土壤的化学稳定修复研究

Effect of Inorganic Amendments on the Stabilization of Heavy Metals in Contaminated Soils

研究了单独无机稳定剂和复合无机稳定剂对污染土壤中重金属的稳定化效果.实验室小试结果表明,KH2PO4和Ca(OH)2混合药剂对Zn和Cu的稳定化具有显著的协同作用,将混合药剂用于实际农田污染土壤的原位稳定化,当两种药剂用量均为0.5 kg.m-2时,Zn、Cu和Cd的稳定化率分别为41.8%、28.2%和48.4%.混合药剂对花生的生长有抑制作用,同时混合药剂能够抑制花生对重金属的吸收.

Effects of single and mixed inorganic amendments on the stabilization of heavy metals in contaminated soils were investigated.Significant synergistic effects on the stabilization of Zn and Cu were observed with the mixed inorganic amendments of KH2PO4and Ca（OH） 2 in the laboratory test.In the field test,the stabilization ratios of Zn,Cu and Cd were 41.8%,28.2% and 48.4%,respectively,with the dosage of 0.5 kg.m-2.The growth of peanut was inhibited by the addition of the inorganic amendments.Meanwhile,the uptake of heavy metals was reduced in peanut.