Poisoned waters traced to source

Charles F. Harvey

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Poisoned waters traced to source

机译：中毒水源溯源

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Millions of people living in the Ganges delta of Bangladesh and West Bengal drink ground-water contaminated by arsenic. Many more ingest arsenic-contaminated water drawn from wells along the Mekong and Red rivers of Cambodia and Vietnam, and probably also along the Irrawaddy River in Myanmar. Arsenic dissolves in groundwater from naturally deposited sediments, but its localization within sedimentary aquifers is puzzling - wells from which severely contaminated water is drawn can be found a mere ten metres away from safe wells. On page 505 of this issue, Polizzotto et al. describe the first study that traces the contamination from its source. The authors show that, at a site near the Mekong River, arsenic-laden groundwater originates from ponds. This water flows horizontally through the aquifer, beneath groundwater that percolates through soils, to contaminate downstream wells.

机译：居住在孟加拉国恒河三角洲和西孟加拉邦的数百万人饮用被砷污染的地下水。从柬埔寨和越南的湄公河和红河以及缅甸的伊洛瓦底江沿线的水井中抽取了更多被砷污染的水。砷从自然沉积的沉积物中溶解在地下水中，但其在沉积含水层中的分布令人费解-从安全井中仅十米处即可找到汲取了严重污染水的井。在此问题的第505页上，Polizzotto等人。描述第一个追踪污染源的研究。这组作者表明，在湄公河附近的某个地点，充满砷的地下水来自池塘。这些水水平地流过含水层，在渗入土壤的地下水下方，污染下游的水井。

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来源
《Nature》 |2008年第7203期|p.415-416|共2页
作者
Charles F. Harvey;
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作者单位

Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类自然科学总论;
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Poisoned waters traced to source

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