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

Publikation: Bidrag til bog/rapport/konferenceproceedingsKonferenceartikel i proceedings

Abstrakt

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
OriginalsprogEngelsk
TitelATV Jord og Grundvand: Arsen i grundvand og drikkevand
ForlagATV-fonden for jord og grundvand
Sider35-44
Antal sider10
StatusUdgivet - 2007
Udgivet eksterntJa
BegivenhedATV-møde: Arsen i grundvand og drikkevand 2007 - Helnan Marselis Hotel, Århus, Danmark
Varighed: 3 okt. 20073 okt. 2007

Konference

KonferenceATV-møde: Arsen i grundvand og drikkevand 2007
Land/OmrådeDanmark
ByÅrhus
Periode3/10/073/10/07

Programområde

  • Programområde 2: Vandressourcer

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