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首页> 外文会议>International Congress Arsenic In The Environment >Sediment and hydrogeochemical contrasts between low and very high arsenic affected areas west and east of river Bhagirathi, West Bengal, India
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Sediment and hydrogeochemical contrasts between low and very high arsenic affected areas west and east of river Bhagirathi, West Bengal, India

机译：西孟加拉邦河北河河北省低砷影响地区的沉积物和水文地球化学对比

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Arsenic concentrations in Bengal Delta sediments are comparable to global averages, but its highly heterogeneous spatial distribution (on scales of meters to kilometers) in sediments and groundwaters is poorly understood. This work targets two very high arsenic (As) affected areas east and two low As affected areas west of the river Bhagirathi in the district of Murshidabad. Detailed sediment chemistry along with hydro-geochemistry and reactive transport models, are coupled to understand the release mechanism of As into the groundwaters in this work. On the one hand this work proposes that the perennial ponds are not the source of dissolved organic matter that mobilizes As at shallow depths in this aquifer and on other hand proposes microbially-mediated oxidation-reduction and competitive ion-exchange processes occurring within the sediments of the shallow aquifers that drive As mobilization and sequestration.
机译：孟加拉三角洲沉积物中的砷浓度与全球平均值相当，但它在沉积物和地下水中的高度异质空间分布（在米为公里的尺寸）是很差的。这项工作瞄准了两个非常高的砷（AS）受影响的地区和Murshidabad区河Bhagirathi河以西的两次低。详细的沉积物化学以及水力地球化学和反应运输模型，加上了本工作中的地下水的释放机制。一方面，这项工作提出了多年生池不是溶解有机物的来源，这些物质在该含水层的浅深度下动员，另一方面提出了在沉积物中发生的微生物介导的氧化还原和竞争离子交换过程作为动员和封存的浅含水层。

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