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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Potentially Toxic Element Pollution Levels and Risk Assessment of Soils and Sediments in the Upstream River Miyun Reservoir China
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Potentially Toxic Element Pollution Levels and Risk Assessment of Soils and Sediments in the Upstream River Miyun Reservoir China

机译：密云水库上游河流潜在的有毒元素污染水平及土壤和沉积物的风险评估

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摘要

This study focused on the Chao River and Baimaguan River located upstream of the Miyun Reservoir in Miyun District (Beijing, China). Soil and sediment samples were collected from the river and drainage basin. Total nitrogen, total phosphorus, and six potentially toxic elements including cadmium, zinc, lead, chromium, arsenic, and copper, were analyzed in terms of concentration, potential ecological risk, and human health risk. The average concentrations of the six potentially toxic elements were all below the soil environmental quality standards for China. Cadmium was the most serious pollutant in both soils and sediments, at 2.58 and 3.40 times its background values. The contents of Cd and Pb were very closely related (p < 0.01) to total nitrogen concentrations in both soil and sediment samples. The potential ecological risks posed by Cd in the Chao and Baimaguan River soils were considerable and moderate, respectively. The historical iron ore mining and agricultural activity were identified as the primary sources of potentially toxic element pollution of soil and sediment in the Chao-Bai River in Miyun District. Human health risk assessment indicated that non-carcinogenic risks all fell below threshold values. The total carcinogenic risks due to Cr and As were within the acceptable range for both adults and children. This conclusion provides a scientific basis for the control of potentially toxic element pollution and environmental protection of the Miyun Reservoir in Beijing.
机译：本研究的重点是位于中国密云区密云水库上游的潮河和白马关河。从河流和流域收集土壤和沉积物样品。对总氮，总磷和六种潜在有毒元素（包括镉，锌，铅，铬，砷和铜）进行了浓度，潜在生态风险和人类健康风险方面的分析。六种潜在有毒元素的平均浓度均低于中国土壤环境质量标准。镉是土壤和沉积物中最严重的污染物，其背景值分别为2.58和3.40倍。镉和铅的含量与土壤和沉积物样品中的总氮浓度密切相关（p <0.01）。潮水和白马关河土壤中镉的潜在生态风险分别为中等和中等。历史悠久的铁矿石开采和农业活动被确定为密云区潮白河土壤和沉积物潜在的有毒元素污染的主要来源。人类健康风险评估表明，非致癌风险均低于阈值。铬和砷引起的总致癌风险在成人和儿童可接受的范围内。该结论为北京密云水库的潜在有毒元素污染控制和环境保护提供了科学依据。

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