کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5747089 1618799 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Distribution of heavy metals and metalloids in bulk and particle size fractions of soils from coal-mine brownfield and implications on human health
ترجمه فارسی عنوان
توزیع فلزات سنگین و متالوئید در کسر حجمی و ذرات خاک از خاک زغال سنگ قهوه ای و پیامدهای آن بر سلامت انسان
کلمات کلیدی
معدن زغال سنگ، براونفیلد، فلزات سنگین، اندازه ذرات، خاک، سلامتی انسان،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- Distribution and sources of heavy metals in coal mine brownfield were determined.
- Distribution characteristics of heavy metals in different soil particles were evaluated.
- Sources of heavy metals in various particle sizes were evaluated.
- Human health risk of coal mine brownfield was assessed.

Heavy metals (HMs) and metalloids migrate into their surroundings, thus increasing environmental risks and threatening human health. Current studies on coal-mine brownfields, however, have not thoroughly investigated soil-associated HMs and metalloids produced by coal mining. Therefore, this study explored the spatial and particle fraction distribution and human health implications of HMs and metalloids. The soil-associated HMs and metalloids are Arsenic (As), Cadmium (Cd), Chromium (Cr), Copper (Cu), Mercury (Hg), Manganese (Mn), Nickel (Ni), Lead (Pb), Scandium (Sc), Titanium (Ti) and Zinc (Zn). Results showed that Cd, Cu, Pb, and Ni were enriched in bulk soils. Cadmium, Cu and Pb from anthropogenic source were mainly found at entrance roadsides and in sites closest to coal mines. HMs and metalloids primarily accumulated in fine fractions (<1, 1-5, and 5-10 μm). Moreover, HM and metalloid loadings substantially accumulated in the 75-250 μm and 250-1000 μm fractions. Most fine soil fractions showed moderate to strong potential ecological risks, whereas all the coarse particle fractions (50-75, 75-250, and 250-1000 μm) presented slight potential ecological risk. Exposure to soil-associated HMs and metalloids mainly occurred via ingestion. The total non-carcinogenic risks to children and adults fell below the safe level of 1, whereas the total carcinogenic risks to these individuals were higher than that of the maximum acceptable level set by the United States Environmental Protection Agency (USEPA, 1 × 10 −4). The total carcinogenic risk was mainly contributed by Cd and Ni through ingestion and dermal access. Therefore, hygiene and food security in areas should be emphasized.

Fig. 7. The relationship among heavy metal content, particle size and TOC of soils from Qingshui River basin.235

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 172, April 2017, Pages 505-515
نویسندگان
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