污泥堆肥化对重金属生物可利用性的影响  

Effects of Sludge Composting on Bioavailability of Heavy Metals

作　　者：孙颖[1] 桂长华[1] 

机构地区：[1]上海大学环境与化学工程学院环境工程系,上海200072

出　　处：《重庆建筑大学学报》2007年第3期110-114,共5页Journal of Chongqing Jianzhu University

基　　金：上海市教委基金(04AC101);长江水环境教育部重点实验室开放基金(YRWEF06008)

摘　　要：通过重金属形态分析及在模拟雨水、酸雨淋溶条件下重金属迁移实验和理论分析,研究了堆肥化处理对污泥中重金属生物可利用性的影响。结果表明:堆肥化处理使重金属的不稳定形态含量降低,原污泥在酸雨淋溶下重金属已经迁移到约16厘米深的土柱中,而经过处理后的污泥淋出液中的重金属含量很低,仅有少量污泥中含量较高的元素向土柱深层迁移。迁移量及深度明显低于未处理的原污泥。实验及理论分析均证明了堆肥化处理可以降低污泥中重金属在土壤中的迁移性,使重金属的生物可利用性降低。With form analysis of heavy metals, the transportation experiment and theoretical analysis of heavy metals by simulated rain and acid rain showering were carried out, the effects of sludge composting on Bioavailability of heavy metals in sludge were studied. The results indicated that the ratio of the unsteady species of heavy metals in sludge is reduced after composting. The heavy metal elements in leachate of original sludge treated with acid rain had moved down to the layer of soil with the depth of 16 cm,while the content of heavy metal of treated one is lower and only a small quantity of elements had moved down to the deep layer of the soil. Both the volume and the depth of the composted sludge are lower apparently than those before composting. The experiment and theoretical analysis verified that both the transportation of heavy metals in soil and the bioactivity of heavy metals are reduced by sludge composting.

关 键 词：污泥 重金属 堆肥化 生物可利用性 

分 类 号：X705[环境科学与工程—环境工程]