广西科学2025，Vol.32Issue(1)：37-46,10.DOI:10.13656/j.cnki.gxkx.20250425.001
广东长沙湾及其邻近海域水环境中重金属含量分布与风险评价
Distribution Characteristics and Risk Evaluation of Heavy Met-als in Seawater from Changsha Bay and Its Adjacent Areas,Guangdong Province
摘要
Abstract
The concentrations of six heavy metals(Cu,Pb,Zn,Cd,Hg,and As)in 20 surface seawater samples from Changsha Bay and its adjacent area in Guangdong Province were measured to reveal the distribution characteristics of the heavy metals.The single-factor pollution index,comprehensive pollution index,coeffi-cient of variation,and correlation analysis were employed to evaluate the pollution status,dispersion degrees,and pollution sources of the six heavy metals in the surface seawater.The results showed the concentrations of Cu,Pb,Zn,Cd,Hg and As in the surface seawater from Changsha Bay and its adjacent area were low and varied within the ranges of 1.50-4.89,0.30-1.47,2.11-6.84,0.09-0.22,0.007-0.025,and 0.6-2.4μg·L-1,respectively.The single-factor pollution index of each heavy metal is less than 1,meeting the re-quirements of the second-class seawater quality standard.The comprehensive pollution index was below 1 for all the six heavy metals and had small variation ranges,which meant the seawater of Changsha Bay and its ad-jacent area was clean.The study area showed pollution and was exposed to the risk of pollution,and the same heavy metal from different stations had similar pollution sources.However,there were no similar pollution levels or same sources between six metals.Cu and As were mainly affected by the industrial waste and marine aquaculture.Pb,Zn and Cd were resulted from ship pollution,while Hg was strongly influenced by the land-sourced pollution and ship pollution.In addition,pH value,Dissolved Oxygen(DO)and Suspended Solids(SS)were the key environmental factors affecting the distribution characteristics of heavy metals in the study area.关键词
重金属/分布特征/污染评价/相关性分析/长沙湾Key words
heavy metal/distribution characteristics/pollution evaluation/correlation analysis/Changsha Bay分类
海洋学引用本文复制引用
陆文平,刘凌峰,李发明,赵晨辉,刘保良..广东长沙湾及其邻近海域水环境中重金属含量分布与风险评价[J].广西科学,2025,32(1):37-46,10.基金项目
广东省平台基地及科技基础条件建设项目(2021B1212050025)资助. （2021B1212050025）
