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Rice Field Geochemistry and Hydrology: An Explanation for Why Groundwater Irrigated Fields in Bangladesh are Net Sinks of Arsenic from Groundwater

机译：稻田地球化学和水文：为什么地下水水浇地在孟加拉国的一个解释是地下水砷的净汇

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Irrigation of rice fields in Bangladesh with arsenic-contaminated groundwater transfers tens of cubic kilometers of water and thousands of tons of arsenic from aquifers to rice fields each year. Here we combine observations of infiltration patterns with measurements of porewater chemical composition from our field site in Munshiganj Bangladesh to characterize the mobility of arsenic in soils beneath rice fields. We find that very little arsenic delivered by irrigation returns to the aquifer, and that recharging water mobilizes little, if any, arsenic from rice field subsoils. Arsenic from irrigation water is deposited on surface soils and sequestered along flow paths that pass through bunds, the raised soil boundaries around fields. Additionally, timing of flow into bunds limits the transport of biologically available organic carbon from rice fields into the subsurface where it could stimulate reduction processes that mobilize arsenic from soils and sediments. Together, these results explain why groundwater irrigated rice fields act as net sinks of arsenic from groundwater.

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Rebecca B. Neumann; Allison P. St. Vincent; Linda C. Roberts; A. Borhan M. Badruzzaman; M. Ashraf Ali; Charles F. Harvey;
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年(卷),期 -1(45),6
年度 -1
页码 2072–2078
总页数 16
原文格式 PDF
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1. Rice Field Geochemistry and Hydrology: An Explanation for Why Groundwater Irrigated Fields in Bangladesh are Net Sinks of Arsenic from Groundwater [J] . Rebecca B. Neumann, Allison P. St. Vincent, Linda C. Roberts, Environmental Science & Technology . 2011,第6期

机译：稻田地球化学和水文学：孟加拉国地下水灌溉田为何是地下水净砷汇的解释
2. Temporal variations in arsenic uptake by rice plants in Bangladesh: The role of iron plaque in paddy fields irrigated with groundwater [J] . J.-M. Gamier, F. Travassac, V. Lenoble, The Science of the Total Environment . 2010,第19期

机译：孟加拉国稻米植物吸收砷的时间变化：地下水灌溉的稻田中铁斑块的作用
3. Hydrology of a groundwater-irrigated rice field in Bangladesh: Seasonal and daily mechanisms of infiltration [J] . Rebecca B. Neumann, Matthew L. Polizzotto, A. Borhan M. Badruzzaman, Water resources research . 2009,第9期

机译：孟加拉国地下水灌溉稻田的水文学：入渗的季节性和日常机制
4. Arsenic porewater dynamics and arsenic uptake by aman rice in intermittently and continuously flooded paddy fields in Bangladesh [C] . L.C. Roberts, S.J. Hug, A. Voegelin, International Congress Arsenic In The Environment . 2012

机译：孟加拉国间歇性和苍白的稻田的砷沉降动态和砷的吸收
5. Nitrous oxide sources and sinks in soil and shallow groundwater beneath a long-term manured and irrigated agricultural field. [D] . Lorenz, Kristen Nicole. 2006

机译：一氧化二氮在长期施肥和灌溉的农田下的土壤和浅层地下水中产生和吸收。
6. Temporal variations in arsenic uptake by rice plants in Bangladesh: the role of iron plaque in paddy fields irrigated with groundwater [O] . J.-M. Garnier, F. Travassac, V. Lenoble, -1

机译：孟加拉国水稻植物吸收的时间变异：铁匾在地下水灌溉稻田中的作用
7. Rice Field Geochemistry and Hydrology: An Explanation for Why Groundwater Irrigated Fields in Bangladesh are Net Sinks of Arsenic from Groundwater [O] . Neumann, Rebecca B., St. Vincent, Allison P., Roberts, Linda C., 2010

机译：稻田地球化学与水文学：孟加拉国地下水灌溉地为何是地下水中砷的净沉的解释

Rice Field Geochemistry and Hydrology: An Explanation for Why Groundwater Irrigated Fields in Bangladesh are Net Sinks of Arsenic from Groundwater

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