摘要
对苏州海绵城市试点区苏州工业园区湿地沉积物进行取样分析,共采集31个样本,分析9种重金属As、Cd、Co、Cr、Cu、Mn、Ni、Pb和Zn的含量特征.分析结果表明,除Mn以外,其余8种元素含量平均值超过环境背景值;地累积指数表明,Pb普遍处于无污染向中度污染的过渡阶段;潜在生态风险指数法表明,Cd是苏州园区湿地中潜在风险程度最高的因子.由相关性分析和主成分分析结果可知,重金属的污染与人类活动密切相关,如工业废水及生活污水的排放.此外,非点源的污染,如工业扬尘、交通排放、农业活动也要引起重视.
The wetland sediments of Suzhou Industrial Park(SIP)in the sponge city pilot area of Suzhou are sampled and analyzed.A total of 31 samples are collected to analyze the content characteristics of nine heavy metals As,Cd,Co,Cr,Cu,Mn,Ni,Pb and Zn.The analysis results show that the average content of the other 8 elements except Mn exceeds the environmental background value.Geoaccumulation index shows that Pb is generally in the transition stage from pollution-free to moderate pollution.The potential ecological risk index method shows that Cd is the factor with the highest potential risk in the wetlands of SIP.Correlation analysis and principal component analysis reveal that the pollution of heavy metals is closely related to human activities such as discharge of industrial wastewater and domestic sewage.In addition,the non-point source pollution,such as industrial fly ash,traffic emission and agricultural activities should not be neglected.
作者
孙保金
庄起帆
罗小进
张建芳
SUN Baojin;ZHUANG Qifan;LUO Xiaojin;ZHANG Jianfang(Suzhou Xiangcheng Testing Co.,Ltd.,Suzhou 215131,Jiangsu Province,China)
出处
《天津科技》
2020年第3期62-68,共7页
Tianjin Science & Technology
关键词
湿地
沉积物
重金属
非点源污染
wetland
sediment
heavy metal
non-point source pollution
