物探与化探2025，Vol.49Issue(2)：500-509,10.DOI:10.11720/wtyht.2025.1043
金沙江流域底泥重金属污染特征及来源解析
Characteristics and source analysis of heavy metal contamination in the sediments of the Jinsha River Basin:A case study of the Qingling River
摘要
Abstract
To understand the characteristics and sources of heavy metal contamination in the sediments of the Jinsha River basin,this study investigated the Qingling River basin-a primary tributary of Longchuan River on the south bank of the Jinsha River.Samples were collected from the sediments of 22 representative sections,and the concentrations of eight heavy metal elements,i.e.,As,Cd,Cr,Cu,Hg,Ni,Pb,and Zn,were tested and analyzed.Statistical analysis was conducted on the distribution characteristics of these heav-y metal elements in the sediments along the basin.The sources of these heavy metals were investigated using correlation analysis and principal component analysis,and the degree of heavy metal contamination in the sediments was assessed using the geo-accumulation index and the Nemero index.The results indicate that As,Cd,Cu,Hg,Ni,Pb,and Zn are primarily influenced by mining,agricul-tural,and industrial activities.Cr and Ni originate primarily from soil-forming parent materials.Besides natural sources,Ni is also af-fected by anthropogenic sources.The assessment results derived using the geo-accumulation and Nemero indices reveal that the eight heavy metal elements exhibit moderate or low contamination on average.However,partial elements,represented by Cd,Hg,Pb,and Zn,exhibit localized enrichment within the basin,primarily concentrated in the Laojiezi Au-Pb-Ag polymetallic mining area and the ur-ban-rural junction in the lower reaches of the county.关键词
底泥/重金属/污染特征/来源分析/金沙江/蜻蛉河Key words
sediment/heavy metal/contamination characteristic/source analysis/Jinsha River/Qingling River分类
资源环境引用本文复制引用
程琰勋,徐磊,吴亮,赵萌生,王福华,钱坤,郑洪福,李文辉,张宏辉..金沙江流域底泥重金属污染特征及来源解析[J].物探与化探,2025,49(2):500-509,10.基金项目
中国地质调查局项目(DD20220987,ZD20220211) （DD20220987,ZD20220211）
