生态环境学报2024，Vol.33Issue(11)：1768-1781,14.DOI:10.16258/j.cnki.1674-5906.2024.11.011
环象山港区域土壤重金属污染特征及风险评估
Characteristics and Risk Assessment of Soil Heavy Metal Pollution in the Xiangshan Bay Area
摘要
Abstract
In recent years,soil heavy metal pollution has become an increasingly serious issue in the southeastern coastal regions of China,owing to rapid economic growth and industrialization.Although several studies have focused on key coastal areas,most have concentrated on marine sediments or organisms,with limited attention given to soil heavy metal contamination under different land-use types.To address this gap,this study aimed to investigate the spatial and temporal distributions of heavy metals in soil and their potential ecological risks in a typical coastal area.From April to May 2023,surface soil samples(0-20 cm,n=216)were collected from various land-use types in Xiangshan Bay,Ningbo,Zhejiang Province.The concentrations of copper(Cu),zinc(Zn),arsenic(As),chromium(Cr),nickel(Ni),lead(Pb),cadmium(Cd),and manganese(Mn)were measured and analyzed for their distribution patterns.The results showed that the median concentrations of these heavy metals were 19.0,93.7,17.4,32.0,13.5,35.4,0.170,and 605 mg·kg-1,respectively.Among them,As,Cd,and Mn showed higher levels of pollution,with As and Cd posing significant ecological risks,while Cu,Zn,Pb,Ni,and Cr levels were relatively low,often below background values or at mild contamination levels.The potential ecological risk assessment indicated that the overall risk in the Xiangshan Bay area was moderate,with croplands exhibiting the highest risk level.Source apportionment analysis revealed that agricultural activities,natural sources,transportation,industry,and parent materials contributed 22.0%,27.5%,14.4%,22.2%,and 13.9%of heavy metal pollution,respectively.These findings suggest that heavy metal pollution,particularly that of As and Cd,is a major concern in the Xiangshan Bay area.Continuous monitoring and remediation efforts are required to ensure sustainable environmental development in the region.关键词
土壤重金属/土地利用类型/分布特征/源解析/潜在生态风险Key words
soil heavy metals/land use types/distributional characteristics/source analysis/potential ecological risks分类
资源环境引用本文复制引用
唐舒娅,王春辉,宋靖,李刚..环象山港区域土壤重金属污染特征及风险评估[J].生态环境学报,2024,33(11):1768-1781,14.基金项目
浙江省自然科学基金探索一般项目(LY23D010004) （LY23D010004）
宁波市公益性科技计划项目(2022S107) （2022S107）
