Econ. Environ. Geol. 2009; 42(5): 487-494

Published online October 31, 2009

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Reactions of As(V) with Fe(II) under the Anoxic Conditions

Woo Sik Jung1, Sang-Hun Lee2, Hyung-Keun Chung1, Sun-Joon Kim2, Jae young Choi3 and Byong-Hun Jeon1*

1Department of Environmental Engineering, Yonsei University
2Department of Natural Resources and Environmental Engineering, Hanyang University
3Korea Institute of Science and Technology (KIST), Gangneung Institute

Correspondence to :

Byong-Hun Jeon

bhjeon@yonsei.ac.kr

Received: October 7, 2009; Accepted: October 21, 2009

Abstract

The purpose of this study was to investigate the feasibility of As(V) reduction by aqueous Fe(II), and subsequent As(III) immobilization by the precipitation of As(III) incorporated magnetite-like material [i.e., co-precipitation of As(III) with Fe(II) and Fe(III)]. Experimental results showed that homogeneous As(V) reduction did not occur by dissolved Fe(II) at various pH values although the thermodynamic calculation was in favor of the redox reaction between As(V) and Fe(II) under the given chemical conditions. Similarly, no heterogeneous reduction of sorbed As(V) by sorbed Fe(II) was observed using synthetic iron (oxy)hydroxide (Goethite, α-FeOOH) at pH 7. Experimental results for the effect of As(V) on the oxidation of Fe(II) by dissolved oxygen showed that As(V) inhibited the oxidation of Fe(II). These results indicate that As(V) could be stable in the presence of Fe(II) under the anoxic or subsurface environments.

Keywords groundwater, arsenic pollution, ferrous iron, arsenate, chemical reduction

Article

Econ. Environ. Geol. 2009; 42(5): 487-494

Published online October 31, 2009

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Reactions of As(V) with Fe(II) under the Anoxic Conditions

Woo Sik Jung1, Sang-Hun Lee2, Hyung-Keun Chung1, Sun-Joon Kim2, Jae young Choi3 and Byong-Hun Jeon1*

1Department of Environmental Engineering, Yonsei University
2Department of Natural Resources and Environmental Engineering, Hanyang University
3Korea Institute of Science and Technology (KIST), Gangneung Institute

Correspondence to:

Byong-Hun Jeon

bhjeon@yonsei.ac.kr

Received: October 7, 2009; Accepted: October 21, 2009

Abstract

The purpose of this study was to investigate the feasibility of As(V) reduction by aqueous Fe(II), and subsequent As(III) immobilization by the precipitation of As(III) incorporated magnetite-like material [i.e., co-precipitation of As(III) with Fe(II) and Fe(III)]. Experimental results showed that homogeneous As(V) reduction did not occur by dissolved Fe(II) at various pH values although the thermodynamic calculation was in favor of the redox reaction between As(V) and Fe(II) under the given chemical conditions. Similarly, no heterogeneous reduction of sorbed As(V) by sorbed Fe(II) was observed using synthetic iron (oxy)hydroxide (Goethite, α-FeOOH) at pH 7. Experimental results for the effect of As(V) on the oxidation of Fe(II) by dissolved oxygen showed that As(V) inhibited the oxidation of Fe(II). These results indicate that As(V) could be stable in the presence of Fe(II) under the anoxic or subsurface environments.

Keywords groundwater, arsenic pollution, ferrous iron, arsenate, chemical reduction

    KSEEG
    Apr 30, 2024 Vol.57 No.2, pp. 107~280

    Stats or Metrics

    Share this article on

    • kakao talk
    • line

    Related articles in KSEEG

    Economic and Environmental Geology

    pISSN 1225-7281
    eISSN 2288-7962
    qr-code Download