Abiotic arsenic mobilization in Bangladesh groundwater aquifers?
孟加拉国地下水含水层中的非生物砷动员?
基本信息
- 批准号:0433886
- 负责人:
- 金额:$ 9.94万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2004
- 资助国家:美国
- 起止时间:2004-09-01 至 2006-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Abiotic Mobilization of Arsenic in Bangladesh Groundwater Aquifers?AbstractMillions of people consuming groundwater in Bangladesh and other affected South Asiancountries are exposed to As levels that are predicted to cause death and disease in the comingdecades. The sequence of steps that leads to elevated groundwater As concentrations in theseregions remains poorly understood, despite intense efforts by scientists throughout the worldover the past several years. This is a serious problem because major policy decisions hinge onaccurate prediction of the impact of groundwater pumping for irrigation on groundwater Asconcentrations. We propose here to explore with a series of simple incubation experiments anew mechanism for As accumulation in groundwater that could have important implications forthe response of shallow Bangladesh aquifers to irrigation.On the basis of spatial patterns of local recharge constrained by 3H-3He dating andgroundwater As profiles established at four sites in Bangladesh, we propose that weathering ofprimary minerals is the rate-limiting step of As mobilization in shallow aquifers. The availabledata suggest that As release by this process is of similar magnitude across a wide range ofenvironments, relatively insensitive to redox conditions, and therefore possibly entirely abiotic innature. The implication is that the distribution of As is determined primarily by spatial variationsin the rate of flushing of shallow aquifers by local recharge. This is a direct challenge to thewidely-held view that the distribution of As in groundwater is controlled primarily bymicrobially-mediated reductive dissolution of Fe oxyhydroxides.The available field data indicate a relatively consistent rate of As release of ~20 ug/L peryear for a wide range of settings. A flux of this magnitude should therefore be detectabledirectly by isolating freshly collected aquifer material and sampling the groundwaterperiodically. In this pilot-study, we propose to conduct such incubations anaerobically for 18months with aquifer material from 4 depth intervals at a well-documented location. The role ofmicroorganisms in As mobilization will be tested by additions of an antibiotic and acetate,respectively. Aquifer material from one depth interval will be subjected to additional treatmentssuch as aerobic incubation and replacement of in situ groundwater with low-As groundwater orpond water. In addition to As concentrations, the major cations Na, Mg, K, and Ca will bemonitored as indicators of chemical weathering. Redox-sensitive solutes such as Fe, Mn, and Swill also be measured.Results from these simple experiments could lead to a radical change in ourunderstanding of the acquisition of solutes by groundwater in the case of a troublesomeconstituent such as As (NSF Criterion 1). The new understanding derived from this work couldinfluence policies that affect the lives and health of millions of people in South Asia (NSFCriterion 2). If our new explanation for As accumulation holds, continued irrigation mightactually reduce As concentrations in shallow aquifers over time. This contrasts with the recentattribution of elevated As levels in Bangladesh groundwater to irrigation.
孟加拉国地下水含水层中砷的非生物迁移?孟加拉国和其他受影响的南亚国家数百万人饮用地下水,他们暴露在砷水平下,预计在未来几十年内会导致死亡和疾病。尽管科学家们在过去几年中付出了巨大的努力,但导致这些地区地下水砷浓度升高的步骤顺序仍然知之甚少。这是一个严重的问题,因为主要的政策决定取决于准确预测地下水灌溉对地下水砷浓度的影响。在此,我们提出了一系列简单的培养实验来探索地下水中As积累的新机制,这可能对孟加拉国浅层含水层对灌溉的响应具有重要意义。我们认为原生矿物的风化作用是浅层含水层中As活化的限速步骤。可用的数据表明,作为释放这一进程是类似的幅度在广泛的环境,相对不敏感的氧化还原条件,因此可能完全非生物的性质。这意味着As的分布主要取决于局部补给对浅层含水层的冲刷速率的空间变化。这直接挑战了地下水中As的分布主要受微生物介导的Fe羟基氧化物还原溶解控制的观点。现有的现场数据表明,在广泛的环境中,As的释放速率相对一致,约为20 ug/L/年。因此,通过分离新收集的含水层物质并定期对地下水取样,可以直接检测到这种量级的流量。在这项试点研究中,我们建议进行这样的培养厌氧18个月的含水层材料从4个深度间隔在一个有据可查的位置。微生物在As动员中的作用将分别通过添加抗生素和乙酸盐进行测试。一个深度区间的含水层材料将进行额外的处理,如有氧培养和低砷地下水或池塘水取代原位地下水。除As浓度外,主要阳离子Na、Mg、K和Ca也将作为化学风化的指标进行监测。氧化还原敏感的溶质,如铁,锰,和S也将被measured.Results从这些简单的实验可能会导致我们的理解从根本上改变收购的溶质地下水的情况下,如砷(美国国家科学基金会标准1)。从这项工作中获得的新认识可能会影响影响南亚数百万人的生活和健康的政策(NSF标准2)。如果我们对砷积累的新解释成立,持续的灌溉实际上可能会随着时间的推移减少浅层含水层中的砷浓度。这与最近孟加拉国地下水砷含量升高归因于灌溉形成鲜明对比。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Alexander van Geen其他文献
Automation of trace-metal-clean column separation: Application to trace metal pre-concentration from seawater
- DOI:
10.1016/0009-2541(88)90727-9 - 发表时间:
1988-08-01 - 期刊:
- 影响因子:
- 作者:
Alexander van Geen;Edward Boyle - 通讯作者:
Edward Boyle
Environmental exposure assessment in the international prospective study of Chronic Kidney Disease of UnceRtain Etiology (CKDu) in Agricultural Communities (CURE) research consortium: Design and protocol development
农业社区中慢性肾脏病不确定病因(CKDu)国际前瞻性研究(CURE)研究联盟的环境暴露评估:设计与方案制定
- DOI:
10.1016/j.scitotenv.2025.179642 - 发表时间:
2025-06-25 - 期刊:
- 影响因子:8.000
- 作者:
Marvin González-Quiroz;Anna Aceituno;Shuchi Anand;Alexander van Geen;Lawrence S. Engel;Emmanuel Jarquin;Clemens Ruepert;Nicole Villegas-González;Mariela Arias-Hidalgo;Nora Franceschini;Daylin Anchía-Pastrán;Karla Solano-Diaz;Andrea Corrales-Vargas;Jennifer Crowe;Idalina Cubilla-Batista;Hildaura Acosta;Adriana Mike;Carolina Guzmán-Quilo;Aurora Aragón;Indiana López-Bonilla;Ana Navas-Acien - 通讯作者:
Ana Navas-Acien
Elevated arsenic concentrations in groundwater of the Upper Indus Plain of Pakistan across a range of redox conditions
巴基斯坦印度河上游平原不同氧化还原条件下地下水中砷浓度升高
- DOI:
10.1016/j.scitotenv.2023.168574 - 发表时间:
2024-02-20 - 期刊:
- 影响因子:8.000
- 作者:
Nisbah Mushtaq;Abida Farooqi;Junaid Ali Khattak;Ishtiaque Hussain;Brian Mailloux;Benjamin C. Bostick;Athena Nghiem;Tyler Ellis;Alexander van Geen - 通讯作者:
Alexander van Geen
Arsenic meets dense populations
砷与密集人口相遇
- DOI:
10.1038/ngeo268 - 发表时间:
2008-08-01 - 期刊:
- 影响因子:16.100
- 作者:
Alexander van Geen - 通讯作者:
Alexander van Geen
Potential lead exposure from aluminum cooking pots in lower and middle-income countries
中低收入国家铝制烹饪锅可能导致的铅暴露
- DOI:
10.1016/j.jhazmat.2025.138134 - 发表时间:
2025-07-15 - 期刊:
- 影响因子:11.300
- 作者:
Gordon Binkhorst;Barbara Jones;Aelita Sargsyan;Alexander van Geen;Keith Wagner - 通讯作者:
Keith Wagner
Alexander van Geen的其他文献
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{{ truncateString('Alexander van Geen', 18)}}的其他基金
Collaborative Research: Informal risk-sharing and private initiative to mitigate local environmental risks
合作研究:非正式风险分担和私人倡议,以减轻当地环境风险
- 批准号:
1853289 - 财政年份:2019
- 资助金额:
$ 9.94万 - 项目类别:
Continuing Grant
CNH: Competing Demands and Future Vulnerability of Groundwater: Drinking Water Quality and Food Security in Arsenic-Impacted South and Southeast Asia
CNH:地下水的竞争需求和未来脆弱性:受砷影响的南亚和东南亚的饮用水质量和粮食安全
- 批准号:
1414131 - 财政年份:2014
- 资助金额:
$ 9.94万 - 项目类别:
Standard Grant
Development of Freeze-Shoe Sampler to Recover Aquifer Sands with In-situ Groundwater From up to 1000-ft Depth
开发冻靴取样器以从深达 1000 英尺的原位地下水中回收含水层沙子
- 批准号:
1160753 - 财政年份:2013
- 资助金额:
$ 9.94万 - 项目类别:
Continuing Grant
Workshop proposal: Recovering Uncompromised Samples of Aquifer Sands with In-Situ Groundwater from up to 300-m Depth in South and Southeast Asia
研讨会提案:利用南亚和东南亚 300 米深处的原位地下水回收未受损的含水层砂样本
- 批准号:
1105148 - 财政年份:2011
- 资助金额:
$ 9.94万 - 项目类别:
Standard Grant
Hydrographic and sediment-trap monitoring of anoxic Soledad Basin off Baja California for enhanced climate reconstructions: An interdisciplinary planning workshop
下加利福尼亚州附近缺氧索莱达盆地的水文和沉积物捕集器监测,以加强气候重建:跨学科规划研讨会
- 批准号:
0927822 - 财政年份:2009
- 资助金额:
$ 9.94万 - 项目类别:
Standard Grant
Collaborative Research: Enhancing the sustainability of groundwater pumping from low-arsenic aquifers in southern Asia - a case-study in Vietnam south of Hanoi.
合作研究:提高南亚低砷含水层地下水抽取的可持续性——以河内以南的越南为例。
- 批准号:
0911557 - 财政年份:2009
- 资助金额:
$ 9.94万 - 项目类别:
Standard Grant
Collaborative Research: Vertical control of groundwater arsenic concentrations in shallow Bangladesh aquifers
合作研究:孟加拉国浅层含水层地下水砷浓度的垂直控制
- 批准号:
0345688 - 财政年份:2004
- 资助金额:
$ 9.94万 - 项目类别:
Standard Grant
Collaborative Research: A High-resolution Record of Productivity and/or Ventilation of the Northeastern Pacific from Soledad Basin, Baja California
合作研究:下加利福尼亚州索莱达盆地东北太平洋生产力和/或通风的高分辨率记录
- 批准号:
0214221 - 财政年份:2002
- 资助金额:
$ 9.94万 - 项目类别:
Standard Grant
Biocomplexity IDEA: Portable Devices To Map The Distribution of Arsenic In Bangladesh Groundwater & The Relation To Sediment Structure
生物复杂性 IDEA:便携式设备绘制孟加拉国地下水中砷的分布图
- 批准号:
0119933 - 财政年份:2001
- 资助金额:
$ 9.94万 - 项目类别:
Standard Grant
Collaborative Research: Coastal Ocean Advances in Shelf Transport (COAST): Iron Input and Wind-driven Circulation along the Oregon Coast
合作研究:沿海海洋陆架运输的进展(COAST):俄勒冈州海岸的铁输入和风驱动环流
- 批准号:
9907953 - 财政年份:2000
- 资助金额:
$ 9.94万 - 项目类别:
Continuing Grant
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Biogeochemical Approach to Understand the Arsenic Formation and Mobilization in Groundwater in Asian Countries
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Nano- and Macroscale Physico-chemical Processes Impacting Arsenic Mobilization
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合作研究:砷迁移的遗传、地球化学和物理耦合控制
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Collaborative Research:Investigation of hydrologic and biogeochemical controls on arsenic mobilization at a field site in Munshiganj, Bangladesh
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Collaborative Research: Investigation of hydrologic and biogeochemical controls on arsenic mobilization at a field site in Munshiganj, Bangladesh
合作研究:孟加拉国 Munshiganj 现场对砷迁移的水文和生物地球化学控制的调查
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Project 6: Mobilization of Anthropogenic As in Groundwater
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- 批准号:
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- 资助金额:
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Toxicity and Mobilization of Metals and Metal Mixtures
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- 批准号:
7426902 - 财政年份:2006
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