Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020863 |
Geochemical Evolution of Groundwater Flowing Through Arsenic Source Sediments in an Aquifer System of West Bengal, India | |
Desbarats, A. J.1; Pal, T.2; Mukherjee, P. K.3; Beckie, R. D.4 | |
2017-11-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; India |
英文摘要 | The source of geogenic arsenic (As) contaminating a shallow aquifer in West Bengal was traced to fine-grained sediments deposited in an abandoned river channel. Along with As-bearing phases, these sediments contain 0.46% codeposited organic carbon. The release of As and the geochemistry of groundwater within the channel-fill deposits is investigated using a detailed mass balance model supported by aqueous, solid-phase, and mineralogical data. The model describes the evolution of groundwater chemistry along a flow path extending from its recharge in an abandoned channel pond, through the channel fill, to the underlying aquifer. Variations in groundwater composition are explained in terms of mineral weathering of host sediments driven by organic carbon decay. Arsenic is released through the reductive dissolution of goethite and the weathering of chlorite. Concomitantly, some As is sequestered in precipitating vivianite. These competing processes reach equilibrium deeper in the channel-fill sequence as groundwater As concentrations stabilize. The model yields estimates of mineral reaction (or precipitation) rates including rates of organic carbon oxidation (1.15 mmol CL-1 a(-1)) and net As release (4.57 x 10(-4) mmol L-1 a(-1)). Fine-grained, slightly permeable, deposits such as channel fill containing reactive organic carbon and As-bearing goethite and phyllosilicates are centers of intense chemical weathering conducive to As mobilization. |
英文关键词 | arsenic groundwater India |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418736700005 |
WOS关键词 | IRON-MINERAL TRANSFORMATIONS ; SHALLOW SANDY AQUIFER ; MEKONG DELTA ; BANGLADESH GROUNDWATER ; MICROBIAL REDUCTION ; ORGANIC-CARBON ; HOLOCENE AQUIFER ; BASIN ; RELEASE ; CONTAMINATION |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21995 |
专题 | 资源环境科学 |
作者单位 | 1.Nat Resources Canada, Geol Survey Canada, Ottawa, ON, Canada; 2.Geol Survey India, Kolkata, W Bengal, India; 3.Geol Survey India, Miss IIIC, Kolkata, W Bengal, India; 4.Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC, Canada |
推荐引用方式 GB/T 7714 | Desbarats, A. J.,Pal, T.,Mukherjee, P. K.,et al. Geochemical Evolution of Groundwater Flowing Through Arsenic Source Sediments in an Aquifer System of West Bengal, India[J]. WATER RESOURCES RESEARCH,2017,53(11). |
APA | Desbarats, A. J.,Pal, T.,Mukherjee, P. K.,&Beckie, R. D..(2017).Geochemical Evolution of Groundwater Flowing Through Arsenic Source Sediments in an Aquifer System of West Bengal, India.WATER RESOURCES RESEARCH,53(11). |
MLA | Desbarats, A. J.,et al."Geochemical Evolution of Groundwater Flowing Through Arsenic Source Sediments in an Aquifer System of West Bengal, India".WATER RESOURCES RESEARCH 53.11(2017). |
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