摘要
以底泥中重金属的含量、毒性累积程度和生态风险水平为评价角度,对龙沙涌底泥重金属污染情况进行判断,为后期治理河道和处理类似污染情况的河道提供数据支撑和参考依据。经调研采样选取了36个点位对龙沙涌底泥中Cd、Hg、Cu、Ni、Zn、As、Pb和Cr重金属的含量进行分析统计,结合龙沙涌周边各地块功能区分布情况对河道底泥的重金属污染进行评价,分析其主要的污染来源。通过地累积指数评价法得出各重金属元素污染程度为Cd>Cu>Zn>Ni>Hg>Cr>Pb>As。通过潜在生态风险指数法得出各重金属元素的潜在生态风险水平为Cd>Hg>Cu>Ni>Cr>As>Zn>Pb。通过相关性分析和主成分分析表明,底泥中大部分重金属元素可能源于与河道相临周边地块,较为严重的支涌底泥污染是影响龙沙涌河道底泥环境的重要因素。
In this paper,the content of heavy metals in the substrate,the degree of toxic accumulation and the level of ecological risk are used as evaluation perspectives to judge the heavy metal pollution of the substrate in Longsha River,which can provide data support and reference basis for the later treatment of the river and the treatment of similarly polluted rivers.After investigation and sampling,36 points were selected to analyze and count the contents of heavy metals including Cd,Hg,Cu,Ni,Zn,As,Pb and Cr in the sediment of Longsha River,and combined with the distribution of functional areas in various plots around Longsha River,the heavy metal pollution in the river sediment was evaluated and the main pollution sources were analyzed.According to the evaluation method of ground accumulation index,the pollution degree of each heavy metal element is Cd>Cu>Zn>Ni>Hg>Cr>Pb>As.According to the potential ecological risk index method,the potential ecological risk level of each heavy metal element is Cd>Hg>Cu>Ni>Cr>As>Zn>Pb.The correlation analysis and principal component analysis show that most heavy metal elements in the sediment may originate from the surrounding land adjacent to the river channel,and the relatively serious pollution of the tributary sediment is an important factor affecting the sediment environment of Longsha River.
作者
陈旭宇
张龙飞
金鑫
周敏
李海云
李勇
CHEN Xuyu;ZHANG Longfei;JIN Xin;ZHOU min;LI HAiyun;LI Yong(School of Environmental Science and Engineering,SUST,Suzhou 215009,China;Environmental Research Institute of SUST of Nanhai District of Foshan,Foshan 528200,China)
出处
《苏州科技大学学报(工程技术版)》
2025年第2期35-42,共8页
Journal of Suzhou University of Science and Technology(Engineering and Technology Edition)
基金
佛山市南海区苏科大环境研究院科技专项项目(352011248)。
关键词
底泥污染
污染分布
生态风险
来源分析
汾江河流域
sediments pollution
pollution characteristics
ecological risk
source apportionment
Fenjiang River Basin
