河南农业科学2024，Vol.53Issue(4)：76-91,16.DOI:10.15933/j.cnki.1004-3268.2024.04.009
豫西典型工业区周边农田土壤重金属污染特征、生态风险与来源解析
Characteristics,Ecological Risks and Sources of Heavy Metal Pollution in Agricultural Soils Surrounding Typical Industrial Zone in West Henan
摘要
Abstract
In order to investigate the characteristics and ecological risks of heavy metal pollution in agricultural soils around typical industrial areas(1 steel mill,6 industrial parks,5 smelters)in West Henan,109 soil samples were collected and measured for Zn,Cu,Cd,Pb,Cr,Ni and As,and a series of indexes,morphology,principal components and clustering methods were employed for the spatial distribution analysis of the heavy metals,evaluation of the contamination and ecological risks,and analysis of the morphology and sources.The results revealed that the degree of contamination and cumulative effects of heavy metals in agricultural soils in the study area were closely related,and Pb had the highest level of contamination and the strongest geo-cumulative effects.Cd,Pb and As were the main factors causing soil environmental risks,and their contributions to the composite potential ecological risk index reached 48.26%,18.81%and 15.58%,respectively.The content of Pb and Cd in the effective state was up to 92.49%and 79.54%,respectively.The proportions of Fe-Mn oxide bound state of Zn and organic bound state of Cu were higher than other heavy metals,with 33.07%and 24.25%,respectively.Whereas the ecological risk of the migration and transformation of Cr,Ni was relatively lower,and the accumulation form in the soil was dominated by the residual state,which accounted for 91.00%,64.63%.The smelters(S1,S3)and the surrounding smelters(S2,S4),steel mill SW and industrial parks(IP1,IP2,IP3)had a synergistic effect on the comprehensive potential ecological risk of heavy metals(Pb,Cd and Zn)in farmland soils in the northwest of the study area.Zn,Pb and Cu mainly came from industrial sources(smelters,iron and steel mills and other industrial production activities);Cd and As originated from industrial sources(smelters)and agricultural sources;and Cr and Ni mainly emerged from natural sources.In addition,Zn,Pb,Cu and Cd were susceptible to natural leaching,soil formation processes and agricultural activities,which increased the ecological risk of migration and transformation.关键词
土壤重金属/污染评价/生态风险/克里金插值/形态分析/源解析Key words
Soil heavy metals/Contamination evaluation/Ecological risk/Kriging interpolation/Chemical fractionation analysis/Source apportionment分类
农业科技引用本文复制引用
李杰飞,王棣,徐宇鹏,杨浩,蔺洪永,包海花,张玲敏..豫西典型工业区周边农田土壤重金属污染特征、生态风险与来源解析[J].河南农业科学,2024,53(4):76-91,16.基金项目
郑州市重大科技创新专项项目(2020CXZX0078) （2020CXZX0078）
