Formation of Fe(Ⅱ)(aq) and Sulfate via Heterogeneous Reaction of SO2 with Fe2O3

Chem. J. Chinese Universities

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Formation of Fe(Ⅱ)(aq) and Sulfate via Heterogeneous Reaction of SO₂ with Fe₂O₃

ZHANG Qiu-Ju, WANG Xiao; CHEN Jian-Min*; ZHUANG Guo-Shun

Center for the Atmospheric Chemistry Study, Department of Environmental
Science & Engineering, Fudan University, Shanghai 200433, China

Received:2005-09-27 Revised:1900-01-01 Online:2006-07-10 Published:2006-07-10
Contact: CHEN Jian-Min

Abstract

Abstract: The formation mechanism of Fe(Ⅱ)(aq) and sulfate via heterogeneous reaction of SO₂ oxidation on the surface of Fe₂O₃was investigated at the normal temperature, pressure and in the presence of oxygen by DRIFTS, XPS, HPLC and IC. The results revealed that the reaction activity of SO₂with Fe₂O₃was closely related to the amount of absorbed water on the surface of Fe₂O₃, which was favorable for the formation of Fe(Ⅱ)(aq) and S(Ⅵ). Under ambient
condition[T=291 K, relative humidity(RH)=68%] within 30 min, for 1 mg Fe₂O₃ with the exhaustion of 53.6 μg SO₂, it could produce 12.6 ng Fe(Ⅱ)(aq) and 56.2 μg SO^2-₄. The concentration of the product, [SO^2-₄], was three orders of magnitude higher than that of Fe(Ⅱ)(aq), indicating that large amount of SO^2-₄production was formed via catalysis by the transitional metal Fe. The reaction mechanism of SO₂oxidation on Fe₂O₃ is proposed.

Key words: Heterogeneous reaction, Fe₂O₃, SO₂, Fe(Ⅱ)(aq), Sulfate

CLC Number:

O643
X131.1

TrendMD:

ZHANG Qiu-Ju, WANG Xiao; CHEN Jian-Min*; ZHUANG Guo-Shun. Formation of Fe(Ⅱ)(aq) and Sulfate via Heterogeneous Reaction of SO₂ with Fe₂O₃[J]. Chem. J. Chinese Universities, doi: .

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Formation of Fe(Ⅱ)(aq) and Sulfate via Heterogeneous Reaction of SO₂ with Fe₂O₃

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