摘要
分析豫北某区域农用地土壤重金属污染情况、空间分布和污染来源,对农用地土壤重金属污染精准防控与管理和合理利用土壤资源保障农产品质量安全具有重要意义。对比分析地质累积指数法、内梅罗综合污染指数法和污染负荷指数法三种污染评价方法,确定最科学客观的评价方法;采用数理统计和地统计学方法,结合SPSS软件,分析评价某区域土壤重金属Cu、Pb、Zn、Cd、Cr、Ni、Hg、As污染状况、空间分布特征及来源,并利用ArcGIS技术分析特点,运用反距离权重插值法(IDW)绘制土壤污染情况空间分布图。结果表明:(1)研究区域农用土壤中8种重金属含量均低于农田土壤污染风险筛选值,土壤污染风险低;(2)Cr和As含量低于河南省土壤环境背景值,以成土母质来源为主;(3)Cu、Pb、Zn、Cd、Ni和Hg平均含量略高于河南省土壤环境背景值,以汽车尾气、农业生产、工业生产等人类生产活动来源为主。
It is of great importance to analyze the current status,the spatial distribution,and the source of heavy metals contamination in agricultural soil in northern Henan region.Therefore,we can precisely control and prevent heavy metal contamination in agricultural soil and ensure the quality and safety of agricultural products.In this study,a scientific and objective evaluation method was established based on the three pollution evaluation strategies,which are the geological accumulation index method,Nemerow comprehensive pollution index method and pollution load index method.Specifically,mathematical and geo-statistics methods combined with SPSS software analysis were used to determine the pollution status,spatial distribution characteristics and sources of heavy metals(Cu,Pb,Zn,Cd,Cr,Ni,Hg and As)in the soil.The spatial distribution map of soil pollution was configured by utilizing the inverse distance weight interpolation(IDW)analysis method from ArcGIS technology.The results showed that:(1)the concentrations of eight heavy metals in agricultural soil in the study area were all lower than the screening value of farmland soil pollution risk,and it has a low risk for soil contamination;(2)the concentrations of Cr and As in the soil were lower than the background values of soil environment in Henan Province,and mainly from parent material sources;(3)The average concentrations of Cu,Pb,Zn,Cd,Ni and Hg in the soil were slightly higher than the background values of soil environment in Henan Province,and were mainly derived from anthropogenic sources such as automobile exhaust,agriculture and industry.
作者
田瑜
杨志轩
常艳文
赵文鹏
任佳豪
TIAN Yu;YANG Zhi-xuan;CHANG Yan-wen;ZHAO Wen-peng;REN Jia-hao(Anyang Ecology&Environmental Monitoring Center of Henan,Anyang,Henan 455000,China;Xinxiang Ecology&Environmental Monitoring Center of Henan,Xinxiang,Henan 453000,China)
出处
《四川环境》
2023年第4期221-228,共8页
Sichuan Environment
关键词
重金属
源解析
空间分布
污染评价
Heavy metal
source apportionment
spatial distribution
pollution assessment
