沈阳农业大学学报2023，Vol.54Issue(6)：693-701,9.DOI:10.3969/j.issn.1000-1700.2023.06.006
开封某农田土壤重金属和微塑料空间分布及生态风险
Spatial Distribution of the Farmland Soil Heavy Metal and Microplastics and Ecological Risk Assessment
摘要
Abstract
In order to study the pollution status and spatial distribution of heavy metals and microplastics in typical farmland,a typical farmland in Kaifeng City,Henan Province was selected as the study area,and the contents of heavy metals(Cr,Ni,Cu,Zn,Cd,Pb)and microplastics in soil were measured.The spatial analysis of soil heavy metal and microplastic pollution in the study area was carried out by the kriging interpolation method,and the soil heavy metal and microplastic pollution in the study area was evaluated by the Nemerow index method and the pollution load index method.The evaluation results showed that there were different degrees of heavy metal and microplastic pollution in the soil in the study area,and the Nemerow index of heavy metal pollution was 2.51,which was at the moderate pollution level,and the average Nemerow index of heavy metal-microplastic composite pollution was 2.62,which was at the moderate pollution level.The pollution load index method showed that the soil in the study area had begun to be polluted by heavy metals and microplastics,and the heavy metal pollution load index was 1.32,which was at the light pollution level,and the comprehensive pollution load index of heavy metal-microplastic composite pollution in the study area was 1.26,which was at the light pollution level.In addition,the results showed that the mean values of soil Cr,Ni,Cu,Zn,Cd and Pb were 49.24,28.29,29.67,68.69,0.29 and 22.28 mg·kg-1,respectively,which were 0.92,1.14,1.39,1.06,3.22 and 1.55 times as high as the background values of soil elements in Henan Province.This results indicate that Cd and Pb in typical farmland soils in Kaifeng are not only affected by the parent material,but also by human activities.The average abundance of microplastics in the study area was 694.35 n·kg-1,1.45 times higher than the background value.At the same time,the spatial distribution results of heavy metals and microplastics showed that the three elements of Cd,Ni and Cu in the southern half of the study area were high,which should be caused by the fertilization of irrigation canal sludge.The high content of Pb,Zn and microplastics in the soil on both sides of the road,as well as the high content of Cd,Zn and microplastics in the soil near the machine well,may be the result of interference from human activities.Human activities are the main way of soil environment microplastic input,coupled with the cold winter and hot summer climate conditions of Kaifeng,it is inferred that the content of microplastics in the typical soil of Kaifeng is higher than the background value may be the use of agricultural film.关键词
农田土壤/重金属/微塑料/空间分析/污染风险评价Key words
farmland soil/heavy metal/microplastics/spatial analysis/pollution risk assessment分类
资源环境引用本文复制引用
张成丽,李霜,雷雨辰,荆杰,邓悦,张伟平,钱静,李涛..开封某农田土壤重金属和微塑料空间分布及生态风险[J].沈阳农业大学学报,2023,54(6):693-701,9.基金项目
河南省重点研发与推广专项计划项目(202102310308) （202102310308）
河南省科技智库调研课题项目(HNKJZK-2021-60C) （HNKJZK-2021-60C）
河南大学科研实验室本科生开放性课题项目(20222604211) （20222604211）
