物探与化探2024，Vol.48Issue(4)：1146-1156,11.DOI:10.11720/wtyht.2024.1347
东平湖表层沉积物重金属环境容量评价及趋势预测
Assessment and trend prediction of the environmental capacity of heavy metals in surface sediments of the Dongping Lake,North China
摘要
Abstract
The environmental capacity of lake sediments serves as a significant indicator for assessing the environmental carrying capac-ity of lake systems,effectively reflecting the stability and sustainability of lake systems.This study investigated the Dongping Lake in the lower reaches of the Yellow River basin by determining 11 heavy metal elements,including As,Cd,Cr,Co,Cu,Hg,Mn,Ni,Pb,Tl,and Zn,in the sampled surface sediments.It delved into the spatial distributions of heavy metal contents and environmental carrying capacity using statistical analysis and geographical information system(GIS)technology.Moreover,it predicted the trend of environmental capacity changes of heavy metals at a centennial scale.The results indicate that:(1)The maximum content of As in the surface sediments of the study area exceededits risk screening value(allowable limit)for soil contamination,whereas those of other ele-ments were below corresponding allowable limits;(2)The average single environmental capacity index(Pi)values of heavy metal ele-ments decreased in the order of Hg,Pb,Cr,Ni,Zn,Cd,Cu,Co,Mn,Tl,and As.Among these heavy metal elements,As dis-played overload level and warning level points,whereas Mn and Tl manifested warning level points.The composite capacity index(Pi)was calculated to be between medium and high capacity levels.The composite capacity level measured based on the inferior level of Pi suggests a medium capacity to overload level distribution in the study area;(3)The static annual capacity limits of heavy metal ele-ments decreased in the order of Mn,Zn,Cr,Ni,Cu,Pb,As,Co,Tl,Cd,and Hg,whereas the dynamic annual capacity limits de-creased in the order of Mn,Zn,Cr,Ni,Pb,Cu,Co,As,Hg,Cd,and Tl.The static and dynamic capacity limits will show a steeply to gently decreasing trend in the 5～40 years and 5～15 years,respectively,followed by a gentle and stable trend.Regardless of the number of years,the average dynamic annual capacity limit is higher than the average static one,suggesting a high environmental car-rying capacity.This study reveals the current status and future trends of environmental capacity in the Dongping Lake,providing a sci-entific basis for the environmental quality assessment and ecological conservation and restoration of the lake.关键词
表层沉积物/重金属/环境容量/趋势预测/东平湖Key words
surface sediment/heavy metal/environmental capacity/trend prediction/Dongping Lake分类
资源环境引用本文复制引用
于林松,胡蕾,王东平,刘辉,陈子万,李华勇,邓焕广..东平湖表层沉积物重金属环境容量评价及趋势预测[J].物探与化探,2024,48(4):1146-1156,11.基金项目
河南省科技攻关项目(232102321109) （232102321109）
安阳师范学院科研基金项目(2024BSKYQD015) （2024BSKYQD015）
山东省地质矿产勘查开发局科技创新项目(KY202227) （KY202227）
聊城大学科研基金项目(318011909) （318011909）
