宁夏某工业园周边农田土壤重金属分布特征及风险评估  

Distribution Characteristics and Risk Assessment of Heavy Metals in Farmland Soil around An Industrial Park in Ningxia

作　　者：童晓玉 郭静静 高瑞丽 陈林[2] 薛斌 高锋 TONG Xiaoyu;GUO Jingjing;GAO Ruili;CHEN Lin;XUE Bin;GAO Feng(School of Agriculture,Ningxia University,Yinchuan,Ningxia 750021,China;School of Ecology and Environment,Ningxia University,Yinchuan,Ningxia 750021,China)

机构地区：[1]宁夏大学农学院,宁夏银川750021 [2]宁夏大学生态环境学院,宁夏银川750021

出　　处：《环境监测管理与技术》2025年第1期50-56,共7页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(42207029);宁夏自然科学基金资助项目(2022AAC03036);宁夏重点研发计划基金资助项目(2021BEB04058)。

摘　　要：采集宁夏黄灌区某工业园区周边农田土壤样品,测定样品中8种重金属全量和TCLP提取态含量,并采用土壤综合质量指数法对土壤重金属污染现状进行评价。结果表明,土壤样品中Mn、As、Pb、Cd、Cu、Ni、Zn和Hg的平均值分别为667.3 mg/kg、12.31 mg/kg、24.56 mg/kg、0.091 mg/kg、24.32 mg/kg、29.72 mg/kg、74.96 mg/kg和0.050 mg/kg,与宁夏土壤元素背景值相比均存在一定程度的积累,且距离工业园区越近,积累越严重,其中Hg的空间分布变异程度较高;8种重金属全量和TCLP提取态含量均分别低于农用地土壤污染风险筛选值和TCLP国际标准限值;研究区域土壤目前尚较清洁,农作物受到重金属污染风险较低。Soil samples were collected from the farmland around an industrial park in the Yellow River irrigation area of Ningxia Plain,the total content and the content extracted by TCLP of 8 heavy metals were determined.The current status of heavy metal pollution in soil was evaluated by comprehensive soil quality index.The results indicated that the average content of Mn,As,Pb,Cd,Cu,Ni,Zn and Hg in soil samples was 667.3 mg/kg,12.31 mg/kg,24.56 mg/kg,0.091 mg/kg,24.32 mg/kg,29.72 mg/kg,74.96 mg/kg and 0.050 mg/kg,respectively.Compared with the background values of elements in the soil of Ningxia,there was a certain degree of accumulation,and the closer to the industrial park,the greater the accumulation.The spatial distribution of Hg varied greatly.The total content and the content extracted by TCLP of the 8 heavy metals were both lower than the risk screening values for soil contamination of agricultural land and the international standard with TCLP.At present,the soil in the study area was relatively clean,and the pollution risk of heavy metals to crops was low.

关 键 词：重金属 农田土壤 生态风险评价 工业园区 宁夏平原黄灌区 

分 类 号：X825[环境科学与工程—环境工程] X820.4