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刘涛,郑培寅,罗文启,王夏祎.南阳盆地典型养殖区土壤重金属污染特征及其来源分析[J].广西科学院学报,2026,42(2):199-208. [点击复制]
- LIU Tao,ZHENG Peiyin,LUO Wenqi,WANG Xiayi.Analysis of the Characteristics and Sources of Heavy Metal Pollution in Soils of Typical Farm Areas in Nanyang Basin[J].Journal of Guangxi Academy of Sciences,2026,42(2):199-208. [点击复制]
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| 南阳盆地典型养殖区土壤重金属污染特征及其来源分析 |
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刘涛1,2,3, 郑培寅1,2,3, 罗文启1,2,3, 王夏祎1,2,3
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| (1.河南省地质局生态环境地质服务中心, 河南郑州 450053;2.河南省矿山环境生态修复工程技术研究中心, 河南郑州 450053;3.河南省水土污染防治科技创新中心, 河南郑州 450053) |
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| 摘要: |
| 研究养殖区周边土壤重金属污染状况及其来源对土壤污染治理具有重要意义。本研究以南阳盆地西南部养殖区周边农田土壤为研究对象，测定土壤中的Cd、Hg、As、Pb、Cr、Cu、Ni和Zn含量，采用单因子污染指数(Pi)法、内梅罗综合污染指数(PN)法评价重金属污染状况，并结合地统计分析与多元统计分析探究土壤重金属空间分布规律与来源。结果表明，研究区农田土壤重金属除Cd、Cu和Zn外，其他重金属元素含量均未超过《土壤环境质量 农用地土壤污染风险管控标准(试行)》(GB 15618—2018)中规定的农用地土壤污染风险筛选值，Cd、Hg、Pb、Cr、Cu、Ni和Zn含量平均值均高于河南土壤环境背景值，存在一定富集趋势。单因子污染指数结果显示，研究区土壤中均出现Cu、Zn和Cd轻度污染现象，其中部分采样点呈Cd中度污染现象，内梅罗综合污染指数结果显示研究区土壤整体处于清洁至轻度污染状态。土壤重金属空间分布图显示，Cd、Hg、Zn、Cu和Ni含量峰值区具有较高重合度，Cr、Pb和As 3种元素含量峰值区则存在较多交叉区域。主成分分析表明，研究区土壤中Hg、Cu、Zn、Cd和Ni污染主要源于养殖场动物粪便堆肥与农业施肥活动，属于“农业污染源”；As与Pb污染则主要源于人类活动，属于“工业源”。 |
| 关键词: 土壤重金属 污染特征 风险评价 来源分析 |
| DOI：10.13657/j.cnki.gxkxyxb.20260529.001 |
| 投稿时间：2025-10-10修订日期：2025-12-16 |
| 基金项目: |
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| Analysis of the Characteristics and Sources of Heavy Metal Pollution in Soils of Typical Farm Areas in Nanyang Basin |
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LIU Tao1,2,3, ZHENG Peiyin1,2,3, LUO Wenqi1,2,3, WANG Xiayi1,2,3
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| (1.Ecological Environment Geo-Service Center of Henan Geological Bureau, Zhengzhou, Henan, 450053, China;2.Henan Engineering Technology Research Center for Mine Environment and Ecological Restoration, Zhengzhou, Henan, 450053, China;3.Henan Science and Technology Innovation Center for Soil and Water Pollution Prevention, Zhengzhou, Henan, 450053, China) |
| Abstract: |
| It is of great significance to study the status and sources of heavy metal contamination in soils surrounding aquaculture zones for soil pollution control.In this study,farmland soils surrounding aquaculture zones in the southwestern Nanyang Basin were selected as research object.The contents of Cd,Hg,As,Pb,Cr,Cu,Ni and Zn in soils were determined.The single factor pollution index (Pi) method and Nemerow comprehensive pollution index (PN) method were used to evaluate the heavy metal pollution status.Geostatistical analysis and multivariate statistical analysis were combined to explore the spatial distribution patterns and sources of soil heavy metals.The results showed that except for Cd,Cu and Zn,the contents of other heavy metals in farmland soil in the study area did not exceed the screening value of soil pollution risk of agricultural land specified in Soil environmental quality risk control standard for soil contamination of agricultural land (GB 15618—2018).The average contents of Cd,Hg,Pb,Cr,Cu,Ni and Zn were all higher than the background values of soil environment in Henan Province,and there was a certain enrichment trend.The results of single factor pollution index showed that the soils in the study area were slightly polluted by Cu,Zn and Cd,and some of the sampling points were moderately polluted by Cd.The results of Nemero comprehensive pollution index showed that the soil in the study area was in a clean to slightly polluted state.The spatial distribution map of soil heavy metals showed that the peak areas of Cd,Hg,Zn,Cu and Ni had a high degree of coincidence,and there were many cross areas in the peak areas of Cr,Pb and As.The principal component analysis showed that the pollution of Hg,Cu,Zn,Cd and Ni in the soil of the study area was mainly due to the composting of animal manure and agricultural fertilization activities,which constitute the “agricultural pollution source”,while the pollution of As and Pb was mainly due to human activities,which constitute the “industrial source”. |
| Key words: soil heavy metals pollution characteristics risk assessment source analysis |
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