Abiotic subsurface behaviors of As(V) with Fe(II)

Sang Hun Lee, Woosik Jung, Byong-Hun Jeon, Jae Young Choi, Sunjoon Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Subsurface geochemical behavior of As(V) with Fe(II) was studied under strict anoxic conditions. Abiotic reduction of As(V) (0.1 mM) to As(III) by aqueous Fe(II) and sorbed Fe(II) in pH range 5.0-7.0 and Fe(II)aq concentration (0.6-1.2 mM) was investigated along with the effect of As(V) on the oxidation of Fe(II) by dissolved oxygen (DO). Although the reduction was thermodynamically feasible for homogeneous chemical conditions, practically no As(V) reduction by aqueous Fe(II) was observed. Similarly, no sorbed As(V) reduction was observed under the heterogeneous experimental conditions by sorbed Fe(II) onto synthetic iron oxide (hematite, α-Fe2O3). Experimental results on Fe(II) oxidation by DO in the presence of 0.1 mM As(V) showed a significantly slower Fe(II) oxidation, which might be due to the formation of Fe(II)-As(V) complex in the aqueous phase. The results of this study demonstrate that As(V) is relatively stable in the presence of Fe(II) under subsurface environment and interfere the oxidation of Fe(II).

Original languageEnglish
Pages (from-to)13-22
Number of pages10
JournalEnvironmental Geochemistry and Health
Volume33
Issue numberSUPPL. 1
DOIs
StatePublished - 2011 Jan 1

Fingerprint

oxidation
Oxidation
ferrous sulfate
Dissolved oxygen
dissolved oxygen
Hematite
Iron oxides
anoxic conditions
iron oxide
hematite
ferric oxide
oligomycin sensitivity-conferring protein
chemical
effect

Keywords

  • Abiotic reduction
  • Arsenate
  • Ferrous
  • Groundwater

Cite this

Lee, Sang Hun ; Jung, Woosik ; Jeon, Byong-Hun ; Choi, Jae Young ; Kim, Sunjoon. / Abiotic subsurface behaviors of As(V) with Fe(II). In: Environmental Geochemistry and Health. 2011 ; Vol. 33, No. SUPPL. 1. pp. 13-22.
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Abiotic subsurface behaviors of As(V) with Fe(II). / Lee, Sang Hun; Jung, Woosik; Jeon, Byong-Hun; Choi, Jae Young; Kim, Sunjoon.

In: Environmental Geochemistry and Health, Vol. 33, No. SUPPL. 1, 01.01.2011, p. 13-22.

Research output: Contribution to journalArticle

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