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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Health Risks and Contamination Levels of Heavy Metals in Dusts from Parks and Squares of an Industrial City in Semi-Arid Area of China
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Health Risks and Contamination Levels of Heavy Metals in Dusts from Parks and Squares of an Industrial City in Semi-Arid Area of China

机译：半干旱地区工业城市公园和广场中粉尘中的重金属的健康风险和污染水平

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摘要

The contamination characteristics and health risk of barium (Ba), cobalt (Co), chromium (Cr), copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), vanadium (V), zinc (Zn), arsenic (As), mercury (Hg), and cadmium (Cd) in samples of dust gathered from squares and parks of Baotou city, an industrial city situated in a semi-arid location of the northwest China were investigated. The contents of Ba, Co, Cr, Cu, Mn, Ni, V, Pb, and Zn in the collected dust samples were determined using X-ray fluorescence spectrometry, while the contents of As and Hg in the dust were investigated by use of the ICP-MS. Further, cadmium was quantified through the atomic absorption spectrometry. Levels of contamination of heavy metals analyzed in the dust samples were evaluated using the Geo-Accumulation index (Igeo) as well as through a Pollution Load Index (PLI). Their health risks to children and adults were evaluated based on the US EPA model of health risk. The findings portrayed that the mean concentrations of Ba, Co Cr, Cu, Pb, V, Cd, and Hg were elevated as compared with their local soil background values. Mean values of Igeo illustrate the order of Co > Cr> Cd > Hg > Pb > Cu > Ba > V > Ni > Mn > Zn > As. It was evident that dusts from the parks and squares were “unpolluted” to “moderately polluted”. Assessment of health risk depicts that ingestion is the foremost route of exposure in regard to the heavy metals, then the dermal adsorption follows. Hg exposure from dust might also set impending health threats to children. Besides, the cancer risks of Co, Cr, Ni, Cd, and As are considered to be within the presently tolerable range.
机译：钡（Ba），钴（Co），铬（Cr），铜（Cu），锰（Mn），镍（Ni），铅（Pb），钒（V），锌（Zn）的污染特征和健康风险），研究人员从包头市广场和公园收集的粉尘样品中的砷，砷，汞和镉进行了测试。包头市位于中国西北半干旱地区。用X射线荧光光谱法测定了所收集的尘埃中的钡，钴，铬，铜，锰，镍，钒，铅和锌的含量，并利用X射线荧光光谱法研究了尘埃中砷和汞的含量。 ICP-MS。此外，通过原子吸收光谱法对镉进行定量。尘土样品中分析的重金属的污染水平是使用地质累积指数（Igeo）以及污染负荷指数（PLI）进行评估的。根据美国EPA健康风险模型评估了他们对儿童和成人的健康风险。研究结果表明，与当地土壤背景值相比，Ba，Co Cr，Cu，Pb，V，Cd和Hg的平均浓度有所提高。 Igeo的平均值说明了Co> Cr> Cd> Hg> Pb> Cu> Ba> V> Ni> Mn> Zn> As>的顺序。显然，公园和广场上的灰尘被“未污染”为“中度污染”。健康风险评估表明，就重金属而言，摄入是最主要的接触途径，然后是皮肤吸收。灰尘接触汞可能还会对儿童造成健康威胁。此外，Co，Cr，Ni，Cd和As的癌症风险被认为在目前的可耐受范围内。

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