Arsenic in groundwater of the Red River Floodplain, Vietnam: Some results of the Vietas project

Diederik Jan 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 proceedingArticle in proceedingsResearch

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 publicationArsen i grundvand og drikkevand : ATV Møde
Place of PublicationKgs. Lyngby
PublisherATV Jord og Grundvand
Publication date2007
Pages35-44
Publication statusPublished - 2007
EventArsen i grundvand og drikkevand - Helnan Marselis Hotel, Århus, Denmark
Duration: 3 Oct 2007 → …

Conference

ConferenceArsen i grundvand og drikkevand
LocationHelnan Marselis Hotel
CountryDenmark
CityÅrhus
Period03/10/2007 → …

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