文献类型：期刊文献

中文题名：北京排水污泥重金属含量的季节变化特征及污染风险评价

作者：姚聪颖[1] 曹吉鑫[2] 彭祚登[1] 熊建军[3] 贾清棋[3]

第一作者：姚聪颖

机构：[1]北京林业大学林学院,北京100083;[2]中国林业科学研究院森林生态环境与保护研究所,北京100091;[3]北京市排水集团有限责任公司,北京100044

年份：2020

卷号：40

期号：8

起止页码：48-52

中文期刊名：环境保护与循环经济

外文期刊名：environmental protection and circular economy

基金：国家发改委环境污染第三方治理“北京市污泥资源化苗圃种植项目”;北京排水集团污泥资源化苗圃种植项目(2017HXFWLXY023)。

语种：中文

中文关键词：污泥;重金属;季节变化特征;污染风险;北京

外文关键词：sludge;heavy metals;seasonal variation characteristics;pollution risk;Beijing

分类号：X502

摘要：城市污水处理厂污泥是污水处理过程中的产物,其所含的重金属元素可能会危害环境安全和人体健康,是污泥土地利用的重要限制因子。对北京市高安屯、小红门以及槐房3座污水处理厂污泥进行了定期取样,比较分析了污泥中铜(Cu)、镍(Ni)、铬(Cr)、锌(Zn)、铅(Pb)、镉(Cd)、汞(Hg)、砷(As)8种重金属含量的季节变化特征,并采用内梅罗综合污染指数评价法对污泥释放重金属可能带来的污染风险进行了评估。结果表明,3座污水处理厂污泥中除镉外其余各重金属的季节性含量变化均存在显著性差异(p<0.05)。根据内梅罗综合污染指数法发现镍在夏季污染风险达到了警戒级别,PI值显示污泥污染的季节性风险排序为夏季>秋季>春季>冬季。在北京应以夏季污泥的重金属含量为参考值探讨污泥土地利用合理施用量,进而降低潜在的环境风险。
Sludge from municipal sewage treatment plants is the product of sewage treatment.The heavy metal elements contained in it may harm the environment and human health,and it is an important limiting factor for the land use of sludge.The paper regularly sampled sludge from three sewage treatment plants in Gao Antun,Xiao Hongmen and Huaifang,Beijing.The seasonal variation characteristics of copper(Cu),nickel(Ni),chromium(Cr),zinc(Zn),lead(Pb),cadmium(Cd),mercury(Hg)and arsenic(As)in sludge were compared and analyzed.The possible pollution risk caused by sludge release of heavy metals was evaluated by Nemero comprehensive pollution index method.The results show that,There were significant differences in the seasonal content of heavy metals except cadmium in sludge from three sewage treatment plants(p<0.05).According to the Nemero composite contamination index,the risk of nickel contamination reached the alert level in the summer.The PI value showed that the seasonal risk of sludge pollution was ranked as summer,spring,autumn,winter.Therefore,in Beijing,the heavy metal content of sludge in summer should be used as a reference value to explore the reasonable utilization of sludge land,so as to reduce the potential environmental risks.