Arsenic in groundwater of the Red River floodplain, Vietnam: Some results of the VietAs project

Dieke Postma, Flemming Larsen, Søren Jessen, Nguyen Thi Minh Hue, Mai Thanh Duc, Pham Hung Viet, Pham Quy Nhan

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedings

Abstract

The mobilization of arsenic (As) to the groundwater was studied in a shallow Holocene aquifer on the Red River flood plain near Hanoi, Vietnam. Results show an anoxic aquifer featuring organic carbon decomposition with redox zonation dominated by the reduction of Fe-oxides and methanogenesis. The concentration of As increases over depth to a concentration of up to 550 μg/L. Most As is present as As(III) but some As(V) is always found.
Arsenic correlates well with NH4, relating its release to organic matter decomposition and the
source of As appears to be the Fe-oxides being reduced
Original languageEnglish
Title of host publicationATV Jord og Grundvand: Arsen i grundvand og drikkevand
PublisherATV-Fonden for Jord og Grundvand
Pages35-44
Number of pages10
Publication statusPublished - 2007
Externally publishedYes
EventATV-møde: Arsen i grundvand og drikkevand 2007 - Helnan Marselis Hotel, Århus, Denmark
Duration: 3 Oct 20073 Oct 2007

Conference

ConferenceATV-møde: Arsen i grundvand og drikkevand 2007
Country/TerritoryDenmark
CityÅrhus
Period3/10/073/10/07

Programme Area

  • Programme Area 2: Water Resources

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