中国地质2026，Vol.53Issue(1)：319-331,13.DOI:10.12029/gc20240116003
辽东湾浅海湿地表层沉积物重金属污染变化及其生态风险:基于2005和2013年度调查数据对比分析
Changes and ecological risks of surface sediment heavy metal pollution in the shallow sea wetlands of the Liaodong Bay:A comparative analysis based on the survey data from 2005 and 2013
摘要
Abstract
This paper is the result of environmental geological survey engineering. [Objectives]To clarify the distribution characteristics and sources of heavy metals,so as to provide new quantitative data and deep understanding for the historical changes of heavy metal pollution in Liaodong Bay,and to provide historical cases for the government to trace the evolution trend of near sea pollution based on the changes of economic development indicators.[Methods]By analyzing surface sediment heavy metals(As,Cd,Pb,Zn,Cu,Cr,Hg),organic carbon(Corg),and particle size in the shallow sea wetlands(SSW)of Liaodong Bay from 2005 and 2013,this study investigated the spatial distribution characteristics,pollution sources,and ecological risk contributions of surface sediment heavy metals and Corg in the SSW of the Liaodong Bay.[Results]The results indicate consistent spatial distribution patterns of heavy metals in both 2005 and 2013,with significant enrichment observed in the southwest of the Xiaoling River,controlled by grain size.The overall spatial distribution of metal concentrations shows a pattern of south>central>north and west>east>central.In 2005(2013),industrial,agricultural,and bedrock derived heavy metal accounted for 40.68%(29.03%),36.69%(48.03%),and 22.63%(22.94%),respectively.In comparison to 2005,significant changes in heavy metal sources were observed due to adjustments in coastal urban industrial structures,including that agricultural production contributed the most to the overall ecological risk(RI)that revealed by geographical detector analysis,and a slight increase in Cr,Cu,Pb,and Zn pollution,while As and Hg pollution significantly intensified that tested by the analysis of the geo-accumulation index(Igeo)and positive matrix factorization(PMF)in 2013.Conversely,Cd pollution showed a notable decrease,suggesting the crucial role of industrial wastewater control efforts.Other heavy metal pollutants were mainly attributed to agricultural activities,with potential contributions from maritime transport to Pb pollution.[Conclusions]Despite the 2 to 3 times growth in the economy of cities near Liaodong Bay,the government's focus on controlling the treatment and discharge of industrial waste water has led to a relatively gentle increase in heavy metal pollution.However,the pollution of heavy metal elements such as Hg,Cu,Pb,and Zn cannot be ignored,especially in areas of sediment with finer grain size,where the ecological risks of heavy metals As and Hg are more severe.关键词
重金属/污染来源/污染变化/沉积物粒度/PMF模型/地理探测器/生态风险评价/辽东湾浅海湿地/环境地质调查工程Key words
heavy metal/pollution sources/pollution changes/sediment grain size/PMF model/geographical detector/ecological risk assessment/liaodong bay shallow sea wetlands/environmental geological survey engineering分类
资源环境引用本文复制引用
陈洋洋,BRIX Hans,叶思源,丁喜桂,谢柳娟,周攀,裴理鑫,袁红明,高宗军,LAWS Alexander Edward..辽东湾浅海湿地表层沉积物重金属污染变化及其生态风险:基于2005和2013年度调查数据对比分析[J].中国地质,2026,53(1):319-331,13.基金项目
国家自然科学基金区域发展联合基金重点项目(U22A20558)、国家林业和草原局应急揭榜挂帅项目(202302)、崂山实验室科技创新项目(LSKJ202204003)、国家重点研发计划中美政府间科技创新重点专项项目(2016YFE0109600)和中国地质调查局项目(DD20189503、DD20221775)联合资助. Supported by the National Natural Science Foundation Regional Development Joint Fund Key Project(No.U22A20558),the Emergency Leading Program of the National Forestry and Grassland Administration(No.202302),the Innovation Project of Laoshan Laboratory(No.LSKJ202204003),the Sino-US Inter-Governmental Key Special Project of the National Key and Program(No.2016YFE0109600),and the projects of China Geological Survey(No.DD20189503,No.DD20221775). （U22A20558）
