普宁土壤重金属的生态风险与健康风险评价
Ecological Risk and Health Risk Assessment of Heavy Metals in Soil of Different Land Use Types in Puning City,Guangdong Province
查看参考文献21篇
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文摘
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文章以普宁市4种不同土地利用类型的土壤为研究对象,运用潜在生态风险指数法和健康风险评价、克里金插值等对Hg、Cd、As、Cu、Pb、Ni、Zn、Cr 8种重金属的潜在生态风险和健康风险进行了研究。结果表明:(1)研究区表层土壤Hg、Cd、As、Cu、Pb、Ni、Zn、Cr平均含量分别为0.104、0.051、5.49、9.05、42.5、11.5、56.6、25.6 mg/kg,其中Hg、Cd、Pb、Ni、Zn的均值超过了广东省背景值。(2)研究区综合潜在生态风险指数(RI)变化范围为34.06~1 299.33,均值为179.08,说明全区具有中等强度的生态风险,不同土地利用类型的RI为建设用地>耕地>林地>园地,Hg、Cd是潜在生态风险最大的2个贡献因子。(3)Hg、Cd、Cu 3种重金属的生态风险高值区主要分布在研究区北部和中部城区,As的生态风险高值区主要分布在研究区中部城区及南部农场地区。(4)研究区总非致癌风险指数(THI)小于1,不存在非致癌健康风险,4种土地利用类型的HI表现为建设用地>林地>园地>耕地,As、Pb、Cr是各土地利用类型非致癌风险最大的3个贡献因子。(5)各土地利用类型As对儿童和成人的致癌风险指数(CR)大于US EPA推荐的土壤治理标准(10~(-6)),Cd和Cr的CR则小于10~(-6)。4种土地利用类型的TCR表现为建设用地>林地>园地>耕地,As也是各土地利用类型最主要的致癌风险因子。 |
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其他语种文摘
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This study took soil of four different land use types in Puning City as the research object,and potential ecological risk and health risks of Hg,Cd,As,Cu,Pb,Ni,Zn and Cr were studied by potential ecological risk index,health risk assessment,and Kriging interpolation.The results indicated that the contents of Hg,Cd,As,Cu,Pb,Ni,Zn and Cr in the topsoil were 0.104,0.051,5.49,9.05,42.5,11.5,56.6 and 25.6 mg/kg,respectively,among which the contents of Hg,Cd,Pb,Ni and Zn had exceeded the soil background values of Guangdong Province.The variation range of the comprehensive potential ecological risk index (RI) in the research area was 34.06~1 299.33,with an average of 179.08,indicating that the whole area has an ecological risk of moderate intensity.RI of different land use types was ranked as construction land >cultivated land >forest land >orchard land,and Hg and Cd were the two contributing factors with the highest potential ecological risk.The high ecological risk areas of Hg,Cd and Cu were mainly distributed in the north and middle of the study area,while the high ecological risk areas of As were mainly distributed in the middle of the study area and the southern farm area.The total index of non-carcinogenic risk in the study area was less than 1,so there was no non-carcinogenic health risk.The HI of the four land use types was expressed as construction land >forest land >orchard land >cultivated land,and As,Pb and Cr were the three contributing factors with the highest risk of non-carcinogenic effects in various land use types.CR of As for children and adults is greater than the soil treatment standard recommended (10~(-6)) by US EPA,while CR of Cd and Cr was less than 10~(-6).The TCR of the four land use types was shown as construction land >forest land >orchard land >cultivated land,and As was also the most important carcinogenic risk factor for each land use type. |
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来源
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环境科学与技术
,2019,42(12):202-210 【核心库】
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DOI
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10.19672/j.cnki.1003-6504.2019.12.031
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关键词
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不同土地利用类型
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重金属
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生态风险
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健康风险
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普宁市
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地址
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长江大学, 油气资源与勘探技术教育部重点实验室, 湖北, 武汉, 430100
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长江大学资源与环境学院, 湖北, 武汉, 430100
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广东省有色金属地质局940队, 广东, 清远, 511500
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中国科学院广州地球化学研究所, 中国科学院矿物学与成矿学重点实验室, 广东, 广州, 510640
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1003-6504 |
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学科
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环境污染及其防治 |
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基金
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国家自然科学基金
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教育部油气资源勘探技术重点实验室开放基金项目
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湖北省自然科学基金
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湖北省教育厅重点项目
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中国科学院广州地球化学研究所有机地球化学国家重点实验室基金
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长江大学大学生创新创业训练项目
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文献收藏号
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CSCD:6721728
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