有毒金属(As,Cd,Cr,Cu,Hg,Ni,Pb,研究了代表嘉兴市区的250个农业土壤样品中的Zn)污染,以调查其时空变化。与1990年代初相比,污染水平增加了。工业和城市化是造成有毒金属污染的主要因素。特别是使用含有有毒金属的饲料。土壤类型和作物栽培方式是造成有毒金属污染空间变异的主要因素。尽管所有有毒金属的单因素污染指数均在安全范围内,根据国家土壤环境质量标准(风险筛选值),如果以嘉兴市土壤元素背景值作为标准,所有调查元素的污染指数均超过1.0,达到轻度污染水平。调查的土壤样品被有毒金属化合物严重污染,他们的水平随着时间的推移而增加。这种情况带来了潜在的生态和健康风险。
The toxic metal (As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn) pollution in 250 agricultural soil samples representing the urban area of Jiaxing was studied to investigate the temporal and spatial variations. Compared to the early 1990s, the pollution level has increased. Industry and urbanization were the main factors causing toxic metal pollution on temporal variation, especially the use of feed containing toxic metals. The soil types and crop cultivation methods are the main factors causing toxic metal pollution on spatial variation. Although the single-factor pollution indices of all the toxic metals were within the safe limits, as per the National Soil Environmental Quality Standard (risk screening value), if the background values of soil elements in Jiaxing City are used as the standard, the pollution index of all the elements surveyed exceeds 1.0, reaching a level of mild pollution. The soil samples investigated were heavily contaminated with toxic metal compounds, and their levels increased over time. This situation poses potential ecological and health risks.