The characteristics of regional distribution and development trend of heavy metals in municipal sludge in China and the factors causing regional differences were comprehensively described. The pollution assessment, potential environmental risk analysis and health risk analysis of heavy metals in sludge were presented. It is put forward that the content of Cu, Pb, Zn, Cd, Cr and Ni decreases from south to north while the content of Hg, and As accounts for a larger proportion in the northern region; the contents of heavy metals in municipal sewage sludge generally show a good downward trend, but the phenomenon of exceeding the standard is still existing; the agricultural sludge is still limited, and different forms of heavy metals show different biological toxicity and environmental behavior, so serious hazards and environmental risks caused by sewage sludge’s secondary pollution can not be ignored.
李冰阳,李克虎,张 玮,薛红琴. 污水处理厂污泥重金属污染现状分析[J]. 煤炭与化工, 2017, 40(7): 22-25,157.
Li Bingyang, Li Kehu, Zhang Wei,Xue Hongqin. Analysis of heavy metal pollution in sludge of sewage treatment plant. CCI, 2017, 40(7): 22-25,157.