污泥农用对土壤中各形态重金属含量变化的影响

Effects of Sludge for Agricultural Use on Content Changes of Different Forms of Soil Heavy Metal

[目的]研究棕壤和褐土在施入工业污泥和生活污泥后，土壤中各形态Cu、Zn、Pb、Cd的含量变化情况。[方法]用污泥和土壤均匀混合的土柱来模拟实际土壤，对土柱进行7次淋洗后，测定土柱中0-10cm均匀混合层中各形态重金属的舍量。[结果]在施入工业污泥和生活污泥后，土壤中重金属根据形态不同而具有各自不同的变化规律。[结论]重金属变化规律不仅与重金属各形态的迁移转化性质有关，还受污泥种类和土壤性质等多种因素的影响。

[ Objective ] The aim of the research was to study mainly on the content changes of copper , zinc , h, ad and cadmium in soil after industrial sludge and living sludge applied to brunisolic and cinnamon soil. [ Method] In this study , soil column was used to replace the truely soil. The contents of all forms heavy metals had been determined in 0 - 10 cm evenly mixed soil layer aider soil columns were leached for seven times. [ Result] The results showed that the contents of heavy metals changed in varying degrees according to different morphology of heavy metals. [ Conclusion] It was not noly related to the migration and transformation nature of heavy metal but also influenced by varieties of factors such as sludge category and soil properties.