化工进展2018，Vol.37Issue(1)：330-342,13.DOI:10.16085/j.issn.1000-6613.2017-0775
城市污泥中重金属存在形态、去除及稳定化研究进展
Developments of the speciation,removal and stabilization of heavy metals in municipal sludge
摘要
Abstract
Municipal sludge is rich in organic matter and nutrients for plant growth such as N,P and K. But it can not be directly used in agriculture as a result of the contamination of heavy metals. In this paper,the origins,characteristics and hazards of heavy metals in municipal sludge are described briefly. The removal and stabilization methods of sludge including chemical,biological,physical and the combination methods,are discussed emphatically. The effects of the methods on the speciation and removal efficiency of heavy metals in sludge treatment process are analyzed. In addition,the merits and weaknesses,influence factors and application scope of these methods are compared. The results show that the speciation of heavy metals is the most critical factor that influences the removal of heavy metals from municipal sludge. There are great difference in the speciation of heavy metals to distribute in sludge and the most of heavy metals existing in stable or relatively stable state,which leads to low efficiency of physical and biological method on heavy metals removal. It is noteworthy that microbial method and lower animals treatment has a better adaptability compared with plant method owing to the limit of space and time. Although heavy metals both in oxidizable and reducible speciation could be effectively transformed and removed,the electric energy consumption is quite outstanding due to the domination of heavy metal transfer from sludge into liquid phase. At present,chemical extraction is currently the best method. It is,however,difficult to utilize treated sludge due to nutrient loss and acid ions accumulation of raw sludge. Consequently,jointly using all kinds of processing technologies in order to improve the removal efficiency of heavy metal from sludge under the premise of land use remains to be further research.关键词
城市污泥/废物处理/重金属污染/去除/稳定/赋存形态/电化学Key words
municipal sludge/waste treatment/heavy metal pollution/removal/stabilization/morphological changes/electrochemistry分类
资源环境引用本文复制引用
解道雷,孔慈明,徐龙乾,徐晓军,李天国,段正洋,刘树丽,刘伟..城市污泥中重金属存在形态、去除及稳定化研究进展[J].化工进展,2018,37(1):330-342,13.基金项目
昆明理工大学分析测试基金项目(20150445). （20150445）
