江西于都南部地区土壤重金属元素生态地球化学特征及其来源解析  

Ecogeochemical Characteristics and Source Analysis of Heavy Metal Elements in Southern Yudu,Jiangxi Province

作　　者：张德富[1,2] 陈希泉 庞新龙[2] 郭俊刚 任国刚 罗杰[2] 吴德海[2] 华国欢 ZHANG Defu;CHEN Xiquan;PANG Xinlong;GUO Jungang;REN Guogang;LUO Jie;WU Dehai;HUA Guohuan(School of Earth Science,East China University of Technology,Nanchang 330013,China;Key Laboratory of Ionic Rare Earth Resources and Environment,Ministry of Natural Resources,Jiangxi College of Applied Technology,Ganzhou 341000,China;School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230000,China;Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CAGS,Zhengzhou 450006,China)

机构地区：[1]东华理工大学地球科学学院,江西南昌330013 [2]江西应用技术职业学院自然资源部离子型稀土资源与环境重点实验室,江西赣州341000 [3]合肥工业大学资源与环境工程学院,安徽合肥230000 [4]中国地质科学院郑州矿产综合利用研究所,河南郑州450006

出　　处：《东华理工大学学报（自然科学版）》2024年第1期45-54,共10页Journal of East China University of Technology(Natural Science)

基　　金：江西省教育厅科技项目(GJJ10283);中国地质调查局项目(DD20221782);江西应用技术职业学院博士启动基金项目(JXYY-G2022004)。

摘　　要：为研究江西于都南部地区耕地土壤重金属污染状况,对所采集的表层土壤样品进行Cr、Ni、Cu、Zn、Cd、Pb、As、Hg等重金属元素测试,研究其空间分布特征,并采用多种评价模型开展生态评价。结果表明,Cr、Ni、Cu、Zn、Cd、Pb、As、Hg含量分别是于都县土壤背景值的1.18、1.24、1.69、1.41、5.79、1.25、2.27、1.41倍。单因子污染指数显示As、Cd污染最严重,是潜在生态风险最主要的贡献因子。内梅罗综合污染指数显示重金属超标率达20.7%。地累积指数显示As污染最严重,其次是Hg、Ni、Cd。8种重金属元素变异系数均为0.45~5.14,属强变异。相关性分析显示,除Hg外的其他重金属间相关性均较强,而且与pH存在显著或极显著正相关,因此可以通过调节土壤pH值,降低土壤中重金属元素的毒性。主成分分析结果显示,Cu、Zn、Cd、Pb、As主要来源于人为采矿活动,Cr、Ni主要来源于土壤母质。In order to study the heavy metal pollution status of farmland soil in the southern region of Yudu,Jiangxi province,surface soil samples were collected to test heavy metal elements such as Cr,Ni,Cu,Zn,Cd,Pb,As,Hg,etc.The spatial distribution characteristics were studied,and multiple evaluation models were used for ecological evaluation.The results showed that Cr,Ni,Cu,Zn,Cd,Pb,As,and Hg were 1.18,1.24,1.69,1.41,5.79,1.25,2.27,and 1.41 times higher than the background values of soil in Yudu County,respectively.The single-factor pollution index showed that As and Cd are the most polluted and are the most significant contributors to the potential ecological risk.The Numero integrated pollution index shows heavy metal exceedance of 20.70%.The ground accumulation index showed that the most serious is As pollution,followed by Hg,Ni,and Cd.The coefficients of variation of all eight heavy metals ranged from 0.45 to 5.14,all of which were strongly variable.Correlation analysis showed strong correlations exsisted among all heavy metals except Hg.The concentrations of heavg metals were significant or highly significant positive correlations with pH,indicating that the toxicity of heavy metal elements in the soils could be reduced by adjusting soil pH.The results of the principal component analysis showed that Cu,Zn,Cd,Pb,and As mainly originated from anthropogenic mining activities,and Cr and Ni primarily originated from the soil parent material.

关 键 词：土壤 重金属污染 地球化学 评价方法 于都 

分 类 号：P595[天文地球—地球化学]