淮河江苏段沉积物重金属的分布特征、来源解析及其生态风险  

Pollution characteristics,potential sources,and ecological risk assessment of heavy metals in surface sediments of Jiangsu section of Huaihe River

作　　者：丁平 张丽娟 吴庆瑶 沈鹏[2] 李歆 黄楚珊 武皓阳 宋晓聪 向重丹 胡国成 DING Ping;ZHANG Lijuan;WU Qingyao;SHEN Peng;LI Xin;HUANG Chushan;WU Haoyang;SONG Xiaocong;XIANG Chongdan;HU Guocheng(South China Institute of Environmental Science,Ministry of Ecology and Environment,State Environment Protection Key Laboratory of Environmental Pollution Health Risk Assessment,Guangzhou,510635,China;Chinese Research Academy of Environmental Sciences,Beijing,100012,China;Southern University of Science and Technology,School of Public Health and Emergency Management,Shenzhen,518055,China)

机构地区：[1]生态环境部华南环境科学研究所,国家环境保护环境污染健康风险评价重点实验室,广州510535 [2]中国环境科学研究院,北京100012 [3]南方科技大学,公共卫生及应急管理学院,深圳518055

出　　处：《环境化学》2023年第2期425-434,共10页Environmental Chemistry

基　　金：国家重点研发计划课题(2018YFC1801501,2018YFC1801505)资助。

摘　　要：为了解淮河江苏段沉积物重金属的污染特征、空间分布及其生态风险,对其表层沉积物中重金属(Cd、Mn、Cu、Zn、As、Ni、Pb和Cr)的含量进行检测,利用相关性和主成分进行重金属来源分析,并采用富集系数与生物毒性不利影响对表层沉积物重金属进行污染评价.结果表明,除Cd与Cr外,Zn、Mn、As、Ni、Cu等重金属的含量均高于江苏土壤背景值.重金属含量空间分布差异明显,其中洪泽湖北部及围湖地区等地重金属污染状况最严重,来源可能来自城镇污水、工业废水等复合污染.富集水平排序为Zn>Mn>As>Ni>Cu>Pb>Cr>Cd,其中Mn、Zn富集程度最为明显.生物毒性不利影响评价总体处于中风险状态,主要贡献来源于Ni、Zn.除了Cu、Cd、Pb外,Ni、Zn、Cr、As重金属可能会对底栖动物产生危害作用.因此,淮河江苏段沉积物重金属整体表现为较重生态风险水平.In order to understand the pollution characteristics,spatial distribution,potential sources,and ecological risk of heavy metals in the surface sediments of Huaihe river basin,the contents of heavy metals(Cd,Mn,Cu,Zn,As,Ni,Pb,and Cr)were analyzed.The potential sources of heavy metal were analyzed by correlation and principal component analysis.Using enrichment factor and mean Probable Effect Concentrations Quotients(mPEC-Q),the potential ecological risk degree of heavy metals in the sediments were evaluated.The results showed that except Cd,Cr,and As,the contents of Zn,Mn,As,Ni,and Cu were higher than their background values.The contents of heavy metals are higher in the north of Hongze,which may come from the combined pollution of domestic sewage and sewage discharge.The m PEC-Q are at medium risk level,and Ni,Zn,Cr,and As result in the damage to benthos.Thus,the heavy metals in surface sediments of Huaihe river basin showed a high ecological risk level.

关 键 词：沉积物 重金属 空间分布 来源解析 生态风险 淮河江苏段 

分 类 号：X52[环境科学与工程—环境工程]