[秦岭典型钼矿区土壤和农作物重金属污染特征、来源分析及健康风险评估]。

Q2 Environmental Science
Chao Zhang, Feng He, Zi-Yu Wang, Meng-Yao Yuan, Pan-Min-Wang Lai, Jun-Kang Guo
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引用次数: 0

摘要

本研究以秦岭(陕西段)钼矿区为研究对象。在矿区附近采集了农作物和相应的土壤样本,并测定了六种重金属(铬、铜、锌、砷、镉和铅)的浓度。测定。采用单因素法、综合污染法和地质累积指数法对土壤重金属污染进行了评估。采用 PMF 模型分析了土壤重金属的主要来源。使用 USEPA 模型对土壤和农作物进行了健康风险评估。结果表明,农业土壤受到铬、铜、锌、镉和铅的严重污染。其中,铬可能主要来自附近的菱锰矿开采活动,占污染总量的 85.1%。铜和砷主要来自农业,分别占 50.3% 和 70.6%。锌和镉主要来自采矿区的金属矿渣粉尘和雨水等自然污染源,分别占 73.5% 和 48.7%。铅主要来自运输污染源,占 54.7%。农作物金属污染中,铬的污染尤为严重,其次是铅,而砷和镉的污染相对较轻。农田土壤中的重金属污染对农作物的影响很大。健康风险评估显示,土壤重金属对儿童有非致癌和致癌风险,而成人面临的风险水平可以接受。作物中的重金属对成人和儿童都有很大的非致癌和致癌风险。此外,必须采取有效措施控制尾矿的重金属污染,以保障附近居民,尤其是儿童免受不利健康风险的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
[Pollution Characteristics, Source Analysis, and Health Risk Assessment of Heavy Metals in Soil and Crops in a Typical molybdenum Mining Area of Qinling Mountains].

This study focused on a molybdenum mining area in the Qinling Mountains (Shaanxi segment). Crop and corresponding soil samples were collected from the vicinity of the mining area, and the concentrations of six heavy metals (Cr, Cu, Zn, As, Cd, and Pb) were determined. Soil heavy metal pollution was assessed using single-factor, comprehensive pollution, and geo-accumulation index methods. The primary sources of soil heavy metals were analyzed using the PMF model. A health risk assessment for soil and crops was conducted using the USEPA model. The results revealed severe pollution of agricultural soils by Cr, Cu, Zn, Cd, and Pb. Among these, Cr may have been primarily sourced from chrombismite nearby mining activities, contributing to 85.1% of the pollution. Cu and As were mainly sourced from agriculture, contributing 50.3% and 70.6%, respectively. Zn and Cd were primarily sourced from natural sources such as metal slag dust and rainwash from the mining area, contributing 73.5% and 48.7%, respectively. Pb was primarily sourced from transportation sources, contributing to 54.7% of the pollution. Crop metal contamination was especially severe for Cr, followed by Pb, whereas As and Cd contamination was relatively lower. Crops were significantly impacted by heavy metal pollution in agricultural soils. The health risk assessment indicated non-carcinogenic and carcinogenic risks for children due to soil heavy metals, whereas adults faced acceptable levels of risk. Both adults and children were exposed to highly significant non-carcinogenic and carcinogenic risks from heavy metals in the crops. Moreover, it is essential to implement effective measures to control heavy metal pollution from tailings to safeguard nearby residents, especially children, from adverse health risks.

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来源期刊
环境科学
环境科学 Environmental Science-Environmental Science (all)
CiteScore
4.40
自引率
0.00%
发文量
15329
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