Pollution and Health Risk Assessment of Heavy Metals in Farmlands and Vegetables Surrounding a Lead-Zinc Mine in Yunnan Province, China
Pollution and Health Risk Assessment of Heavy Metals in Farmlands and Vegetables Surrounding a Lead-Zinc Mine in Yunnan Province, China
复制标题
云南某铅锌矿周边农田及蔬菜重金属污染及健康风险评价
DOI：
10.1080/15320383.2021.1963669
复制
发表时间：
2021-08-11
影响因子：
2
通讯作者：
Zhan, Fang-dong
中科院分区：
文献类型：
--
作者：
Lai, Li;Li, Bo;Zhan, Fang-dong
为调查云南省会泽县某铅锌矿周边土壤和蔬菜中重金属的污染特征，采集了30份表层土壤样品和蔬菜样品，测定了铅（Pb）、锌（Zn）、铜（Cu）、镉（Cd）等重金属含量。采用单因素污染指数、内梅罗综合污染指数、目标危害指数对潜在风险进行评价。结果表明，土壤中Pb、Zn、Cu和Cd的含量分别为954.1、2236.5、151.1和4.83 mg center dot kg(-1)。与云南省土壤背景值相比，铅锌矿周边土壤受到Pb、Zn、Cd污染。内梅罗综合污染指数评价表明土壤为重度污染。蔬菜中Pb、Zn、Cu和Cd的含量分别为117.5-778.6、430.3-2212.4、16.8-89和1.28-34.3 mg center dot kg(-1)。其中，蔬菜中的铅、镉含量超出了我国食品安全国家标准（GB 2762-2017）食品中污染物限量。土壤中Pb、Zn、Cd含量与蔬菜可食部分Pb、Zn、Cd含量呈极显着或显着相关。结果表明，铅锌矿周边土壤和蔬菜重金属污染严重，健康风险较大。研究结果不仅揭示了云南省会泽县铅锌矿周边土壤和蔬菜中重金属的污染特征，也可为合理利用和生态修复提供科学依据。
To investigate the contaminant characteristics of heavy metals in soils and vegetables surrounding a lead-zinc mine in Huize County, Yunnan Province, thirty surface soil samples and vegetable samples were collected to measure the contents of heavy metals, including lead (Pb), zinc (Zn), copper (Cu), and cadmium (Cd). The potential risk was evaluated by using the single factor pollution index, Nemerow comprehensive pollution index, and target hazard index. The results showed that the contents of Pb, Zn, Cu, and Cd in the soil were 954.1, 2236.5, 151.1, and 4.83 mg center dot kg(-1), respectively. Compared with the soil background values in Yunnan Province, the soil surrounding the lead-zinc mine was polluted by Pb, Zn and Cd. The Nemerow comprehensive pollution index evaluation indicated that the soil was heavily polluted. The contents of Pb, Zn, Cu, and Cd in vegetables were 117.5-778.6, 430.3-2212.4, 16.8-89, and 1.28-34.3 mg center dot kg(-1), respectively. Among them, the contents of Pb and Cd in vegetables exceeded the pollutant limit in food products of China's National Standard for Food Safety (GB 2762-2017). The contents of Pb, Zn and Cd in the soil were extremely significantly or significantly correlated with the contents of Pb, Zn and Cd in the edible parts of vegetables. The results indicated that there was serious heavy metal pollution and significant health risk for the soil and vegetables surrounding the lead-zinc mine. The research results not only reveal the contaminant characteristics of heavy metals in soils and vegetables surrounding a lead-zinc mine in Huize County, Yunnan Province, but also could provide a scientific evidence for reasonable utilization and ecological remediation.