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

Title
Reactions of As(V) with Fe(II) under the Anoxic Conditions
Authors
정우식이상훈정형근김선준최재영전병훈
Keywords
groundwater; arsenic pollution; ferrous iron; arsenate; chemical reduction; 지하수; 비소오염; 2가 철; 5가 비소; 화학적 환원
Issue Date
2009-12
Publisher
자원환경지질
Citation
VOL 42, NO 5, 487-494
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.
URI
http://pubs.kist.re.kr/handle/201004/37222
ISSN
1225-7281
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KIST Publication > Article
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