粉煤灰钝化污泥对土中总氮·总磷和重金属含量的影响  

Effect of Sewage Sludge Stabilized by Fly Ash on TN,TP and Heavy Metals in Soil

作　　者：杨文娟[1] 薛小康[1] 王守红[2] 张家宏[2] 王小治[1] 

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225127 [2]江苏里下河地区农业科学研究所,江苏扬州225007

出　　处：《安徽农业科学》2012年第26期12846-12847,12872,共3页Journal of Anhui Agricultural Sciences

基　　金：扬州市社会发展科技攻关项目(yz2010077)

摘　　要：[目的]研究粉煤灰对土中的总氮、总磷和重金属含量的影响。[方法]在土壤中分别添加质量浓度为1%、3%的混有不同比例粉煤灰(2%、5%、10%、15%)的污泥。[结果]与对照相比,施用1%和3%污泥增加了土中TN、TP含量,其增幅分别为6.74%～30.29%和3.81%～32.67%,粉煤灰的加入量对其增幅无明显的影响;污泥施用增加了土中Cu、Zn、Pb、Ni和Cr的含量,投加粉煤灰在污泥低用量(10 g/kg)时未表现出明显的重金属钝化作用,而在高用量(30 g/kg)时表现出对Ni和Pb的钝化。[结论]施用污泥可增加土中TN、TP含量,但粉煤灰对其无明显影响;污泥施用增加了土中重金属的含量,投加粉煤灰在污泥高用量时表现出对Ni和Pb的钝化。[ Objective] The research aimed to investigate the effects of sewage sludge stabilized by fly ash on TN, TP and heavy metals in soil. [ Method] 1% and 3% sewage sludge stabilized by fly ash was added to the soil. [ Result] Sewage sludge increased the amount of TN and TP in soil with the extent of 6.74% -30. 29% and 3.81% - 32.67% respectively, while fly ash had no obvious effect on it. Sewage sludge increased the amount of Cu, Zn, Pb, Ni and Cr in soil. The passivation of fly ash to Ni and Pb was obvious in the treatment of 3% sewage sludge, while fly ash was no obvious effect on heavy metals in the treatment of 1% sewage sludge. [ Conclusion ] Sewage sludge increased the amount of TN and TP in soil, respectively while fly ash had no obvious effect. Sewage sludge increased the amount of heavy metals in soil, and the passivation of fly ash to Ni and Pb was obvious in the treatment of 3% sewage sludge.

关 键 词：重金属 粉煤灰 污泥 

分 类 号：S181.3[农业科学—农业基础科学]