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湖南某锡矿区土壤重金属污染及健康风险评价

李剑锋, 冯李霄. 2023. 湖南某锡矿区土壤重金属污染及健康风险评价[J]. 中国地质, 50(3): 897-910. doi: 10.12029/gc20220825003
引用本文: 李剑锋, 冯李霄. 2023. 湖南某锡矿区土壤重金属污染及健康风险评价[J]. 中国地质, 50(3): 897-910. doi: 10.12029/gc20220825003
LI Jianfeng, FENG Lixiao. 2023. Health risk assessment of heavy metal pollution in soil of a tin mining area in Hunan Province[J]. Geology in China, 50(3): 897-910. doi: 10.12029/gc20220825003
Citation: LI Jianfeng, FENG Lixiao. 2023. Health risk assessment of heavy metal pollution in soil of a tin mining area in Hunan Province[J]. Geology in China, 50(3): 897-910. doi: 10.12029/gc20220825003

湖南某锡矿区土壤重金属污染及健康风险评价

详细信息
    作者简介: 李剑锋,男,1986年生,博士,讲师,主要从事地貌学与矿床学研究工作;E-mail:317649474@qq.com
  • 中图分类号: X53

Health risk assessment of heavy metal pollution in soil of a tin mining area in Hunan Province

More Information
    Author Bio: LI Jianfeng, male, born in 1986, doctor, lecturer, mainly engaged in geomorphology and mineralogy research; E-mail: 317649474@qq.com .
  • 研究目的

    本文采集表层土壤114件、柱状土壤3组,分析测定Cu、Pb、Zn、Cr、Cd、As、Hg等7种重金属元素含量;评价锡矿区周边土壤重金属污染状况与风险。

    研究方法

    采用地累积指数法、潜在生态风险指数法和健康风险评估模型,对该地区污染程度、潜在生态风险和人体健康风险进行评价。

    研究结果

    (1)研究区土壤重金属平均含量表现为As>Zn>Pb>Cu>Cr>Cd>Hg;(2)就空间分布而言,Cu、Pb、Zn、Cd和As富集区主要分布于矿区附近,含量随深度增加而降低,在60 cm之下趋于稳定;Cr富集区主要分布于人口较密集的生活区,Hg分布均匀,无明显富集区;(3)地累积结果显示,研究区As和Cd呈极重污染,Cu、Pb和Zn呈轻—极重污染,Cr和Hg呈现无—轻度污染;(4)潜在生态结果显示,研究区整体处于极重污染水平,As和Cd生态风险最为突出;(5)健康风险评估显示,土壤中As和Pb为主要非致癌因子,As为主要致癌因子;As元素非致癌与致癌风险最大,经口摄入为最主要的暴露途径,儿童健康更易受到重金属污染的威胁。

    结论

    研究区7种重金属均在一定程度上受到人为因素的影响,As和Cd受人为影响程度最大,其次为Pb、Zn和Cu,Cr和Hg受人为影响较弱。

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  • 图 1  研究区概况(a)与采样点位置(b)

    Figure 1. 

    图 2  表层土壤重金属含量空间分布

    Figure 2. 

    图 3  柱状土壤重金属含量空间分布

    Figure 3. 

    图 4  土壤重金属地累积指数污染占比

    Figure 4. 

    图 5  土壤重金属潜在生态风险指数箱型图

    Figure 5. 

    表 1  地累积指数污染程度分级

    Table 1.  Classifications of geo-accumulation index pollution level

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    表 2  潜在生态风险评价等级划分

    Table 2.  Classifications potential ecological risk evaluation level

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    表 3  健康风险评估模型暴露参数

    Table 3.  Exposure parameters of health risk assessment model exposure parameters

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    表 4  不同暴露途径的参考剂量(RfD)和斜率因子(SF)

    Table 4.  Reference dose (RfD) and slope factor (SF) of different exposure routes

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    表 5  研究区土壤重金属含量特征分析(mg/kg)

    Table 5.  Characterization of soil heavy metal content in the study area (mg/kg)

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    表 6  土壤重金属非致癌平均日暴露量(mg/(kg·d))

    Table 6.  Average daily exposure of non-carcinogenic heavy metals in soils (mg/(kg·d))

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    表 7  土壤重金属致癌平均日暴露量(mg/(kg·d))

    Table 7.  Average daily exposure of soil heavy metals causing cancer (mg/(kg·d))

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    表 8  土壤重金属非致癌健康风险指数

    Table 8.  Non-carcinogenic health risk index of soil heavy metal

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    表 9  土壤重金属致癌健康风险指数

    Table 9.  Cancer health risk index of soil heavy metal

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收稿日期:  2022-08-25
修回日期:  2023-02-15
刊出日期:  2023-06-25

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