globalchange  > 气候变化与战略
DOI: 10.1016/j.scitotenv.2020.137143
论文题名:
Spatial and temporal evolution of groundwater arsenic contamination in the Red River delta, Vietnam: Interplay of mobilisation and retardation processes
作者: Stopelli E.; Duyen V.T.; Mai T.T.; Trang P.T.K.; Viet P.H.; Lightfoot A.; Kipfer R.; Schneider M.; Eiche E.; Kontny A.; Neumann T.; Glodowska M.; Patzner M.; Kappler A.; Kleindienst S.; Rathi B.; Cirpka O.; Bostick B.; Prommer H.; Winkel L.H.E.; Berg M.
刊名: Science of the Total Environment
ISSN: 489697
出版年: 2020
卷: 717
语种: 英语
英文关键词: Arsenic geochemistry ; Groundwater hydrochemistry ; Methanogenic conditions ; Redox transition ; Reductive dissolution ; Water isotopes
Scopus关键词: Aquifers ; Arsenic ; Groundwater flow ; Groundwater pollution ; Groundwater resources ; Health risks ; Hydrochemistry ; Hydrogeology ; Iron compounds ; Manganese compounds ; Arsenic concentration ; Dissolved organic matters ; Groundwater advections ; Groundwater arsenic contamination ; Methanogenic condition ; Redox transition ; Reductive dissolution ; Water isotope ; Groundwater geochemistry ; arsenic ; dissolved organic matter ; ferric ion ; ground water ; manganese ; advection ; aquifer ; arsenic ; dissolution ; groundwater flow ; methanogenesis ; mobilization ; Pleistocene ; redox conditions ; spatiotemporal analysis ; water chemistry ; adsorption ; aquifer ; Article ; evaporation ; evolution ; geochemistry ; Holocene ; methanogenesis ; oxidation reduction state ; Pleistocene ; pollution monitoring ; pollution transport ; priority journal ; river ; sediment ; Viet Nam ; water contamination ; Red River Delta ; Viet Nam
英文摘要: Geogenic arsenic (As) contamination of groundwater poses a major threat to global health, particularly in Asia. To mitigate this exposure, groundwater is increasingly extracted from low-As Pleistocene aquifers. This, however, disturbs groundwater flow and potentially draws high-As groundwater into low-As aquifers. Here we report a detailed characterisation of the Van Phuc aquifer in the Red River Delta region, Vietnam, where high-As groundwater from a Holocene aquifer is being drawn into a low-As Pleistocene aquifer. This study includes data from eight years (2010–2017) of groundwater observations to develop an understanding of the spatial and temporal evolution of the redox status and groundwater hydrochemistry. Arsenic concentrations were highly variable (0.5–510 μg/L) over spatial scales of <200 m. Five hydro(geo)chemical zones (indicated as A to E) were identified in the aquifer, each associated with specific As mobilisation and retardation processes. At the riverbank (zone A), As is mobilised from freshly deposited sediments where Fe(III)-reducing conditions occur. Arsenic is then transported across the Holocene aquifer (zone B), where the vertical intrusion of evaporative water, likely enriched in dissolved organic matter, promotes methanogenic conditions and further release of As (zone C). In the redox transition zone at the boundary of the two aquifers (zone D), groundwater arsenic concentrations decrease by sorption and incorporations onto Fe(II) carbonates and Fe(II)/Fe(III) (oxyhydr)oxides under reducing conditions. The sorption/incorporation of As onto Fe(III) minerals at the redox transition and in the Mn(IV)-reducing Pleistocene aquifer (zone E) has consistently kept As concentrations below 10 μg/L for the studied period of 2010–2017, and the location of the redox transition zone does not appear to have propagated significantly. Yet, the largest temporal hydrochemical changes were found in the Pleistocene aquifer caused by groundwater advection from the Holocene aquifer. This is critical and calls for detailed investigations. © 2020 The Authors
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158219
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department Water Resources and Drinking Water, Dübendorf, 8600, Switzerland; Key Laboratory of Analytical Technology for Environmental Quality and Food Safety Control (KLATEFOS), VNU University of Science, Vietnam National University, Hanoi, Viet Nam; Institute of Applied Geosciences, Karlsruhe Institute of Technology, Karlsruhe, 76131, Germany; Applied Geochemistry, Institute for Applied Geosciences, Technical University Berlin, Berlin, 10587, Germany; Geomicrobiology, Center for Applied Geosciences, University of Tübingen, Tübingen, 72076, Germany; Microbial Ecology, Center for Applied Geosciences, University of Tübingen, Tübingen, 72074, Germany; Hydrogeology, Center for Applied Geosciences, University of Tübingen, Tübingen, 72074, Germany; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, United States; CSIRO Land and Water, Floreat, Western Australia 6014, Australia; School of Earth Sciences, University of Western Australia, Crawley, WA 6009, Australia; Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zurich, 8092, Switzerland; UNESCO Chair on Groundwater Arsenic Within the 2030 Agenda for Sustainable Development, School of Civil Engineering and Surveying, University of Southern QueenslandQLD 4350, Australia

Recommended Citation:
Stopelli E.,Duyen V.T.,Mai T.T.,et al. Spatial and temporal evolution of groundwater arsenic contamination in the Red River delta, Vietnam: Interplay of mobilisation and retardation processes[J]. Science of the Total Environment,2020-01-01,717
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Stopelli E.]'s Articles
[Duyen V.T.]'s Articles
[Mai T.T.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Stopelli E.]'s Articles
[Duyen V.T.]'s Articles
[Mai T.T.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Stopelli E.]‘s Articles
[Duyen V.T.]‘s Articles
[Mai T.T.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.