生活垃圾堆放场周边表层土壤重金属污染及健康风险评价  

Heavy Metal Pollution and Health Risk Assessment of Surface Soil around Domestic Garbage Site

作　　者：刘辰朔 闫金霞[1] 郑筱萱 LIU Chen-shuo;YAN Jin-xia;ZHENG Xiao-xuan(North China University of Water Resources and Electric Power,Zhengzhou Henan 450046,China)

机构地区：[1]华北水利水电大学,河南郑州450046

出　　处：《环境科学导刊》2024年第3期77-82,共6页Environmental Science Survey

摘　　要：以河南某高校垃圾堆放场周边表层土壤为研究对象,分析土壤理化性质和重金属含量,并对表层土壤重金属进行污染评价和健康风险评价。研究结果表明,土壤含水率与植被覆盖率相关,与垃圾堆放场的远近无关;距离垃圾堆放处越远土壤中全盐量越小;垃圾堆放处对于土壤中的全氮和总磷含量并未有直接的影响。表层土壤中重金属As、Cd、Cr、Cu、Ni、Pb和Zn的含量均低于河南省土壤背景值,除重金属Cd以外,距离垃圾堆放处越远重金属含量越小。研究发现距离垃圾堆放处较近对于蔬菜中重金属含量有一定的影响。毛豆对于重金属的富集能力较强,更容易吸收土壤中的各种重金属元素。根据单因子指数法分析显示,本区域目前尚未受到污染。地累积指数法计算得出,研究区域土壤重金属处于无污染状态。蔬菜的目标危险系数(THQ)均<1,说明食用该区域的蔬菜并不会对人体健康产生影响。This study took the surface soil around a garbage dump in a university in Henan as the research object,analyzed the physical and chemical properties of the soil and the content of heavy metals,and evaluated the pollution and health risk of heavy metals in the surface soil.The research results indicated that soil moisture content was related to vegetation coverage,and was not related to the distance of garbage disposal sites.The farther away from the garbage dump,the smaller the total salt content in the soil was.The garbage dump had no direct impact on the total nitrogen and total phosphorus content in the soil.The content of heavy metals As,Cd,Cr,Cu,Ni,Pb,and Zn in the surface soil was lower than the background value of soil in Henan Province.Except for heavy metal Cd,the farther away from the garbage dump,the lower the heavy metal content was.Research has found that being closer to the garbage dump had a certain impact on the heavy metal content in vegetables.Soybean had a strong ability to accumulate heavy metals and was more likely to absorb various heavy metal elements in the soil.According to the analysis using the single factor index method,the region has not yet been contaminated.According to the calculation of the land accumulation index method,the soil heavy metals in the study area were in a pollution-free state.The target hazard coefficient(THQ)of vegetables was all less than 1,indicating that consuming vegetables in this area would not have an impact on human health.This study was of great significance for improving and strengthening campus greening work and ensuring the physical health of teachers and students.

关 键 词：表层土壤 重金属 蔬菜 健康风险评价 

分 类 号：X825[环境科学与工程—环境工程]