Heterogeneous uptake of carbonyl sulfide on hematite and hematite-NaCl mixtures.

Heterogeneous uptake of carbonyl sulfide on hematite and hematite-NaCl mixtures. Research Abstract Details 

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Heterogeneous uptake of carbonyl sulfide on hematite and hematite-NaCl mixtures. Abstract Text:

Haihan Chen,Lingdong Kong,Jianmin Chen,Renyi Zhang,Lin Wang,Haihan Chen,Lingdong Kong,Jianmin Chen,Renyi Zhang,Lin Wang,

Heterogeneous uptake of carbonyl sulfide (COS) on hematite, NaCl, and a series of hematite-NaCl mixtures was investigated in a static reaction chamber at 298 K using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The adsorbed COS was oxidized on the surface of hematite and hematite-NaClmixtures, forming surface hydrogen thiocarbonate (HSCO2-), carbonate (CO3(2-)), and sulfate (SO4(2-)) species as well as gaseous CO2. The reactivity of hematite-NaCI mixtures was lower than that of hematite alone. No uptake of COS was observed on the pure NaCl sample. For mixtures, the 40% hematite + 60% NaCl sample exhibited the highest reactivity. Preadsorption experiments using CO2 as a probe molecule indicated that about 70% of adsorbed COS was oxidized by surface oxygen ions on hematite. In contrast, the Fe-CIO species formed during the sample preparation procedure is proposed to be the active site on the hematite-NaCI mixtures. A plausible reaction mechanism of the heterogeneous oxidation of COS is proposed, and atmospheric implications based on these results are discussed.

Heterogeneous uptake of carbonyl sulfide on hematite and hematite-NaCl mixtures. Publishing Authors By Initials

H Chen,L Kong,J Chen,R Zhang,L Wang,H Chen,L Kong,J Chen,R Zhang,L Wang,

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Heterogeneous uptake of carbonyl sulfide on hematite and hematite-NaCl mixtures. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Environmental science & technology

VOLUME: 41

Page Numbers: 6484-90

Journal Abbreviation: Environ. Sci. Technol.

ISSN: 0013-936X

DAY: 15

MONTH: Sep

YEAR: 2007

Heterogeneous uptake of carbonyl sulfide on hematite and hematite-NaCl mixtures. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Heterogeneous uptake of carbonyl sulfide on hematite and hematite-NaCl mixtures.

AFFILIATION: Center of Atmospheric Chemistry Studies, Department of Environmental Science & Engineering, Fudan University, 220 Handan Road, Shanghai 200433, People's Republic of China.

Country: United States

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MEDLINETA: Environ Sci Technol

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