| 内蒙古包头市固阳县某铁矿区周边土壤多元素测定与健康风险评价 |
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| 引用本文： | 王昌宇,李永利,周文辉,毛磊,卢震,胡浩远,杜鑫,边鹏,高琪.内蒙古包头市固阳县某铁矿区周边土壤多元素测定与健康风险评价[J].岩矿测试,2022(3):476-487. |
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| 作者姓名： | 王昌宇 李永利 周文辉 毛磊 卢震 胡浩远 杜鑫 边鹏 高琪 |
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| 作者单位： | 中国地质调查局呼和浩特自然资源综合调查中心, 内蒙古 呼和浩特 010010 |
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| 基金项目： | 中国地质调查局地质调查项目（DD20208077） |
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| 摘 要： | 矿产的开发利用会向周边土壤释放重金属元素，当人体摄入或接触受污染的土壤则可能会产生健康危害。铁矿是中国分布最为广泛的矿种之一，但前人对铁矿区土壤重金属健康风险的研究较少，尤其是干旱区铁矿。干旱区生态脆弱，修复困难，因此需要更加科学地对土壤加强管理。本文以内蒙古包头市固阳县某铁矿区为研究对象，采集表层土壤101件，采用电感耦合等离子体质谱/发射光谱法和原子荧光光谱法测定了土壤中的重金属含量，研究元素的特征，并利用健康风险评价法评价重金属对人体的健康危害，提出土壤污染筛选值。结果显示：(1)研究区土壤中Cu、Cr、Ni变异系数大于0.5,平均含量明显高于河套平原背景值；(2)Cu的高值区主要分布于尾矿库与选矿厂周边，Cr、Ni的高值区主要分布于基岩山区；(3)健康风险评价结果表明各元素的危害商(HQ)均小于1,由大到小顺序为As>Cr>Ni>Cu>Cd>Zn>Hg,总危害商(HI)的平均值为0.542,有1个点HI大于1,位于矿区南部基岩区，Cr、Ni、As的贡献率分别为59%、25%、15%,总致癌风险指数(CR)均小于10-4;...
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| 关 键 词： | 土壤 重金属 铁矿 干旱区 健康风险 筛选值 电感耦合等离子体质谱/发射光谱法 原子荧光光谱法 |
| 收稿时间： | 2021/9/27 0:00:00 |
| 修稿时间： | 2021/12/11 0:00:00 |
Determination of Multiple Elements in Soils Surrounding Iron Deposits from Guyang County, Baotou City, and Health Risk Assessment |
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| WANG Changyu,LI Yongli,ZHOU Wenhui,MAO Lei,LU Zhen,HU Haoyuan,DU Xin,BIAN Peng,GAO Qi.Determination of Multiple Elements in Soils Surrounding Iron Deposits from Guyang County, Baotou City, and Health Risk Assessment[J].Rock and Mineral Analysis,2022(3):476-487. |
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| Authors: | WANG Changyu LI Yongli ZHOU Wenhui MAO Lei LU Zhen HU Haoyuan DU Xin BIAN Peng GAO Qi |
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| Institution: | Hohhot Natural Resources Comprehensive Survey Center, China Geological Survey, Hohhot 010010, China |
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| Abstract: | BACKGROUND: The exploitation of minerals releases heavy metals into the surrounding soil, which can cause health hazards when biological entities are exposed to contaminated soil. Iron ore is one of the most widely distributed minerals in China, but there are few studies on the health risk of soil heavy metals in iron mines, especially in arid areas. The ecosystem of the arid area is fragile and difficult to repair once it has been polluted.OBJECTIVES: To perform environmental health risk assessment for topsoil surrounding iron deposits from Guyang County, Baotou City.METHODS: 101 topsoil samples were collected from an iron mine in Guyang County, Baotou City. Heavy metals were measured by inductively coupled plasma-mass spectrometry/optical emission spectrometry and atomic fluorescence spectrometry, to study element characteristics. The health risk assessment method was used to evaluate and calculate the screening value.RESULTS: The results showed that the variation coefficients of copper, chromium, and nickel in the study area were higher than 0.5, and the average contents of these elements were significantly higher than that in the Hetao Plain. The high value areas of copper were mainly distributed around tailings ponds and concentrators, while the high value areas of chromium or nickel were mainly distributed in bedrock mountains. The assessment of health hazards showed that the hazard quotient of all elements was less than 1, and the order was As>Cr>Ni>Cu>Cd>Zn>Hg. The average of total hazard quotient was 0.542. There was a sample in the bedrock mountain south of the iron mine, which had a total hazard quotient exceeding 1, and the contribution rates of chromium, nickel and arsenicwere 59%, 25%, and 15%,respectively. The carcinogenic hazard index of all elements was below 10-4. Soil screening levels of chromium, nickel and arsenic in the study area were 579mg/kg, 622mg/kg and 32.8mg/kg base on human health.CONCLUSIONS: Chromium and nickel in the study soil are mainly affected by parent materials of soil formation, while copper is mainly affected by mineral processing activities. In general, the health hazard of heavy metals in soil is relatively low, and is greatly influenced by the parent materials of soil formation. However, it is still necessary to pay attention to the accumulation of polluted elements in the areas around tailings ponds, and to avoid oral intake of pollutants. And it is also necessary to further study the feature of soil heavy metals from different kinds of iron mines and different regions that have not been studied before, because the associated elements of iron ore in different regions or types are not the same. |
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| Keywords: | soil heavy metals iron mine arid area healthy risk screening levels inductively coupled plasma-mass spectrometry/optical emission spectrometry atomic fluorescence spectrometry |
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