废弃物填埋场土壤污染分析及重金属离子化学形态健康风险评估

苗芳芳; 张一梅; 李鱼; 林千果

doi:DOI:10.13205/j.hjgc.202207014

废弃物填埋场土壤污染分析及重金属离子化学形态健康风险评估

doi: DOI:10.13205/j.hjgc.202207014

苗芳芳^1,3,
张一梅^1,2, ,,
李鱼¹,
林千果²

1. 华北电力大学环境科学与工程学院, 北京 102206;
2. 华北电力大学苏州研究院环境修复与功能材料实验室, 江苏苏州 215213;
3. 华北电力大学能源动力与机械工程学院, 北京 102206

基金项目:

国家重点研发计划项目(2018YFB0605504)

国家自然科学基金(51878272)

详细信息

作者简介:
苗芳芳(1988-),女,博士,主要研究方向为污染物环境风险评估与防控。miaoff@tom.com

通讯作者:
张一梅(1982-),女,教授,博士,主要研究方向为环境修复技术及污染风险预控。zhangym@ncepu.edu.cn

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出版历程
- 收稿日期: 2021-09-29
- 网络出版日期: 2022-09-02

ANALYSIS OF SOIL POLLUTION AND HEALTH RISK ASSESSMENT OF CHEMICAL

MIAO Fangfang^1,3,
ZHANG Yimei^{1,2
, ,},
LI Yu¹,
LIN Qianguo²

1. College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China;
2. Laboratory of Environment Remediation and Function Material, Suzhou Research Academy of North China Electric Power University, Suzhou 215213, China;
3. College of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China

摘要

摘要: 为了减少固体废弃物填埋场对居民和环境的影响,以江苏省某固体废弃物填埋场为研究对象开展健康风险评估。采集研究区域土壤样品,分析As、Ni、Cd、Zn、Pb、Hg等重金属含量,分别应用克里金插值、化学质量平衡形态模拟、健康风险评估模型方法,对目标重金属浓度空间分布、重金属形态种类及区域健康风险水平进行研究。结果表明:该地区主要受固体废弃物填埋及农田过量施肥污染。其中,Cd和Zn含量均超过土壤背景值,汞含量接近背景值。模拟获得Cd金属形态15种,Zn金属形态21种,对金属形态浓度进行健康风险评估,得出CdCO₃、Cd²⁺具有致癌风险,总贡献率分别为38.4%和31.9%;Zn₂S₃^2-具有非致癌风险,总贡献率为91.66%。Cd²⁺的致癌风险值在10^-6~10^-4,其致癌风险水平不可忽视。因此,研究区域重金属形态对人体的毒性应引起人们的重视。
- 化学质量平衡 /
- 空间插值 /
- 金属形态 /
- 健康风险评估
Abstract: To reduce the impact of landfills on residents and the environment when performing landfill operation,a solid waste landfill site in Jiangsu Province was taken as the research object to carry out a health risk assessment.Soil samples in the study area were collected and analysed to obtain the contents of heavy metals such as As,Ni,Cd,Zn,Pb,and Hg.Kriging interpolation,chemical mass balance morphological simulation,and health risk assessment models were applied respectively.The concentration spatial distribution,speciation,and regional health risk of heavy metals were studied.The results showed that the area was mainly polluted by solid waste landfills and over-fertilization of agricultural land.The contents of Cd and Zn were higher than the soil background values,and Hg content was close to the background value.15 types of metal forms of Cd and 21 metal forms of Zn were obtained by simulation.A health risk assessment was conducted on the obtained metal species,and it was concluded that Cd²⁺ and CdCO₃ had carcinogenic risks,with total contribution rates of 38.4% and 31.9%,respectively.But Zn₂S₃^2- metal form had non-carcinogenic risk,and the total contribution rate was 91.66%.The carcinogenic risk of Cd²⁺ ranged from 10^-6 to 10^-4,and that's not ignorable.Therefore,the toxicity of heavy metal species to humans in the study area should be paid more attention to.
- chemical mass balance /
- spatial interpolation /
- metal speciation /
- health risk assessment

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