江苏潮间带表层沉积物重金属空间分布及污染评价
Spatial distribution and pollution evaluation of heavy metals in surface sediments of intertidal zone,Jiangsu Province
欧阳凯 1刘强 1闫玉茹 1项立辉 1张刚1
作者信息
- 1. 地球化学勘查与海洋地质调查研究院,江苏 南京 210007
- 折叠
摘要
对采自江苏潮间带的824个表层沉积物中的重金属元素Cu、Pb、Zn、Cr、Cd含量进行测定,采用相关分析法对表层沉积物重金属来源进行了解析,根据海洋沉积物质量标准(GB 18668-2002)对沉积物进行分级评价,同时采用Hakanson潜在生态危害指数法进行污染评价.结果表明:江苏潮间带表层沉积物Zn、Pb含量均符合一类沉积物标准,Cr、Cd、Cu含量均符合二类沉积物标准;研究区Cu、Pb、Zn元素在物源或富集特征上具有相似性,Cd元素不受元素"粒度控制律"控制,其含量分布主要受人类活动影响;江苏潮间带表层沉积物重金属总体污染和潜在生态危害处于低风险级别,重金属潜在生态危害指数由大到小依次为Cd＞Pb＞Cu＞Cr＞Zn.
Abstract
Contents of heavy metals,namely,Cu,Pb,Zn,Cr and Cd,in 824 surface sediment samples collected from intertidal zone of Jiangsu Province were measured.Sources of heavy metals in the surface sediments were analyzed by the correlation analysis.The sediments were evaluated and graded according to the Marine Sediment Quality(GB 18668-2002).The ecological risk regarding heavy metals was assessed by Hakanson potential ecological risk assessment method.Contents of Zn and Pb in the surface sediments of inter-tidal zone of Jiangsu Province meet the national first-class sediment standard,and contents of Cr,Cd and Cu meet the national second-class sediment standard.Cu,Pb and Zn elements are similar in source or accumulation.Cd is not controlled by the granularity control law,whose distribution is mainly affected by human activities.The overall pollution and the potential ecological risk of heavy metals in the surface sediments of intertidal zone of Jiangsu Province are at low risk level,and the potential ecological risk coefficient of heavy metals is Cd＞Pb＞Cu＞Cr＞Zn in descending order.
关键词
潮间带/表层沉积物/重金属/污染评价/江苏沿海Key words
intertidal zone/surface sediment/heavy metal/pollution evaluation/coastal Jiangsu Province引用本文复制引用
基金项目
江苏省地质勘查基金(苏财建[2018]96号)
出版年
2024
NETL
NSTL
万方数据