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    许青阳, 戴亮亮, 彭志刚, 张俊, 肖凯琦, 巩浩, 吴欢欢. 湖南省龙山县土壤重金属特征与健康风险评价[J]. 中国地质. DOI: 10.12029/gc20230703001
    引用本文: 许青阳, 戴亮亮, 彭志刚, 张俊, 肖凯琦, 巩浩, 吴欢欢. 湖南省龙山县土壤重金属特征与健康风险评价[J]. 中国地质. DOI: 10.12029/gc20230703001
    XU Qingyang, DAI Liangliang, PENG Zhigang, ZHANG Jun, XIAO Kaiqi, GONG Hao, WU Huanhuan. Characteristics and health risk evaluation of soil heavy metals in Longshan County, Hunan Province[J]. GEOLOGY IN CHINA. DOI: 10.12029/gc20230703001
    Citation: XU Qingyang, DAI Liangliang, PENG Zhigang, ZHANG Jun, XIAO Kaiqi, GONG Hao, WU Huanhuan. Characteristics and health risk evaluation of soil heavy metals in Longshan County, Hunan Province[J]. GEOLOGY IN CHINA. DOI: 10.12029/gc20230703001

    湖南省龙山县土壤重金属特征与健康风险评价

    Characteristics and health risk evaluation of soil heavy metals in Longshan County, Hunan Province

    • 摘要:研究目的】在龙山县采集土壤样品775件,分析土壤重金属As、Cd、Cr、Cu、Hg、Ni、Pb、Zn的含量特征,评价土壤重金属造成的健康风险。【研究方法】利用地累积指数进行了土壤重金属污染评价,基于相关性分析和主成分分析讨论了土壤重金属的来源,采用健康风险模型评估了土壤重金属对人体产生的健康风险。【研究结果】结果表明:龙山县土壤中Cd含量的平均值明显高于湖南省土壤背景值,表明龙山县土壤中Cd存在一定程度的富集。As和Cd的变异系数均大于0.5,Hg的变异系数大于1,可能受到人类活动的影响。龙山县土壤中存在不同程度的As、Cd、Cr、Cu、Hg、Ni、Pb、Zn污染,其中,Cd污染范围较广,局部地区Hg污染程度严重。龙山县土壤重金属来源可分为三类: Cr、Cu、Ni主要来源于成土母质; As、Cd、Pb、Zn主要来源于铅锌矿开采选冶,同时,Cd的来源与成土母质有一定的关系; Hg主要来源于化石燃料燃烧。龙山县土壤重金属对儿童造成的健康风险高于成人,需注意龙山县里耶镇、苗儿滩镇和洛塔乡土壤重金属产生的健康风险。此外,As、Cr是造成非致癌风险的主要重金属元素,Cr、Ni是造成致癌风险的主要重金属元素,经口摄入是产生健康风险主要暴露途径。【结论】龙山县土壤中重金属存在不同程度的污染,As、Cd、Ni是健康的主要贡献因子。

       

      Abstract: This paper is the result of geological survey engineering. ObjectiveA total of 775 soil samples were collected in Longshan County for the purpose of analyzing the content characteristics of soil heavy metals, including As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn. Additionally, an evaluation of the health risks caused by soil heavy metals was conducted. MethodsTo assess the level of soil heavy metal pollution, the geo-accumulation index was utilized. The source of soil heavy metals was identified through correlation analysis and principal component analysis. Furthermore, a health risk model was employed to assess the potential risks imposed by soil heavy metals on human health. ResultsThe results of the analysis revealed that the average concentration of Cd in the soil of Longshan County was significantly higher than the background value observed in the soil of Hunan Province. This suggests that there is a certain degree of Cd enrichment in the soils of Longshan County. Moreover, the coefficients of variation for Hg, As, and Cd were greater than 0.5, and the coefficient of variation for Hg exceeded 1, indicating that these heavy metals may be influenced by human activities. The presence of As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn contamination was observed in the soils of Longshan County. Notably, Cd pollution was widespread, and some areas exhibited severe levels of Hg contamination. The sources of soil heavy metals in Longshan County can be categorized into three groups:Cr, Cu, and Ni primarily originate from the soil parent materials, while As, Cd, Pb, and Zn are predominantly influenced by lead-zinc mining and smelting activities. The source of Cd also has some association with the soil parent materials. Furthermore, Hg is mainly derived from the combustion of fossil fuels. The health risks caused by soil heavy metals were found to be higher for children compared to adults. Additionally, special attention should be given to the health risks caused by soil heavy metals in Liye Town, Miaoertan Town, and Luota Town of Longshan County. Furthermore, non-carcinogenic risks are primarily attributed to As and Cr, whereas carcinogenic risks are primarily linked to Cr and Ni. Oral ingestion was identified as the main exposure route contributing to health risks. ConclusionsThere was a variable degree of heavy metal pollution in the soil of Longshan County, and As, Cr, Ni were the main contributing factors to health risks.

       

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