污泥堆肥前后重金属Ni和Cd形态变化研究  

Research on the Form Change of the Heavy Metal: Ni and Cd in Sludge before and after its Composting

作　　者：潘玉[1] 郭浩磊[1] 曾正中[1] 徐燕[1] 张贺飞[1] 南忠仁[1] 

机构地区：[1]兰州大学资源环境学院,甘肃兰州730000

出　　处：《安徽农业科学》2010年第31期17708-17709,共2页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金项目(40671167)

摘　　要：[目的]研究堆肥化处理对污泥中重金属Ni和Cd的含量及形态的影响。[方法]通过添加木屑调节城市污泥的C/N比,进行堆肥化处理,研究堆肥前后重金属Ni和Cd的总量及形态分布变化。[结果]堆肥化处理后,明显改变了Ni和Cd的形态分布,明显降低了Ni的不稳定态含量,在一定程度上降低了Cd的生物有效性,起到一定的钝化作用,但使Ni和Cd的总量浓度略有上升。[结论]该研究为重金属的活性控制提供理论依据,从而提高污泥土地利用率。[ Objective ] The effect of the eomposting treatment of the content of Ni and Cd in sludge and their morphological variation was researched. [ Method] The content of Ni and Cd in sludge and their morphological variation in compost processing was analyzed through the ad- justment of the ratio of C/N in municipal sewage sludge based on wood chip-adding. [ Result] The composting treatment could significantly change the morphological distribution of Ni and Cd, the content of the Ni with unstable state was significantly decreased the bioavailability of Cd was reduced to a certain extent（ passive role）, however the concentration in total amount of Ni and Cd was slightly increased. [ Conclusion] The theoretical basis of the activity-controlling of heavy metal was provided for the improvement of the utilization of sludge land.

关 键 词：污泥 重金属 堆肥 化学形态 

分 类 号：X705[环境科学与工程—环境工程]