Role of Chromium and Vanadium in the Atmospheric Oxidation of Sulfur(IV)
(1998) In Atmospheric Environment 32(4). p.797-800- Abstract
- Oxidation of HSO3- in aqueous solution has been studied in the presence of vanadium(V), chromium(III) and chromium(VI). Based on spectrophotometric kinetics data and product analysis it is concluded that the autoxidation rate of sulfur(IV) in slightly acidic solution is unaffected by the presence of vanadium(V) and chromium(III). Chromate(VI), on the other hand, oxidizes sulfur(IV) in a direct redox process in acidic solution. The overall rate of this reaction decreases with increasing pH and it becomes relatively slow in the atmospherically relevant pH range 4-6. Moreover, chromium(III) dominates strongly over chromium(VI) in the atmospheric aqueous phase. Hence, it is concluded that cations of vanadium vanadium and chromium have no... (More)
- Oxidation of HSO3- in aqueous solution has been studied in the presence of vanadium(V), chromium(III) and chromium(VI). Based on spectrophotometric kinetics data and product analysis it is concluded that the autoxidation rate of sulfur(IV) in slightly acidic solution is unaffected by the presence of vanadium(V) and chromium(III). Chromate(VI), on the other hand, oxidizes sulfur(IV) in a direct redox process in acidic solution. The overall rate of this reaction decreases with increasing pH and it becomes relatively slow in the atmospherically relevant pH range 4-6. Moreover, chromium(III) dominates strongly over chromium(VI) in the atmospheric aqueous phase. Hence, it is concluded that cations of vanadium vanadium and chromium have no significant influence on the atmospheric aqueous-phase oxidation of sulfur(IV) under most ambient atmospheric conditions. Only in very acidic droplets, direct redox between chromium(VI) and sulfite might be of some importance. (Less)
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https://lup.lub.lu.se/record/92178d89-afd1-403d-ab90-fb7363cf3b59
- author
- Brandt, Christian and Elding, Lars Ivar LU
- organization
- publishing date
- 1998
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Transition metals, Atmospheric oxidation, Sulfur(IV), tropospheric aqueous phase, transition metals, troposheric aqueous phase, catalysis, kinetics, sulfur(IV) oxidation, atmospheric chemistry, Reaction mechanism
- in
- Atmospheric Environment
- volume
- 32
- issue
- 4
- pages
- 4 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:0032005323
- ISSN
- 1352-2310
- DOI
- 10.1016/S1352-2310(97)00331-2
- language
- English
- LU publication?
- yes
- id
- 92178d89-afd1-403d-ab90-fb7363cf3b59
- date added to LUP
- 2016-12-27 19:02:32
- date last changed
- 2022-01-30 08:48:44
@article{92178d89-afd1-403d-ab90-fb7363cf3b59, abstract = {{Oxidation of HSO3- in aqueous solution has been studied in the presence of vanadium(V), chromium(III) and chromium(VI). Based on spectrophotometric kinetics data and product analysis it is concluded that the autoxidation rate of sulfur(IV) in slightly acidic solution is unaffected by the presence of vanadium(V) and chromium(III). Chromate(VI), on the other hand, oxidizes sulfur(IV) in a direct redox process in acidic solution. The overall rate of this reaction decreases with increasing pH and it becomes relatively slow in the atmospherically relevant pH range 4-6. Moreover, chromium(III) dominates strongly over chromium(VI) in the atmospheric aqueous phase. Hence, it is concluded that cations of vanadium vanadium and chromium have no significant influence on the atmospheric aqueous-phase oxidation of sulfur(IV) under most ambient atmospheric conditions. Only in very acidic droplets, direct redox between chromium(VI) and sulfite might be of some importance.}}, author = {{Brandt, Christian and Elding, Lars Ivar}}, issn = {{1352-2310}}, keywords = {{Transition metals; Atmospheric oxidation; Sulfur(IV); tropospheric aqueous phase; transition metals; troposheric aqueous phase; catalysis; kinetics; sulfur(IV) oxidation; atmospheric chemistry; Reaction mechanism}}, language = {{eng}}, number = {{4}}, pages = {{797--800}}, publisher = {{Elsevier}}, series = {{Atmospheric Environment}}, title = {{Role of Chromium and Vanadium in the Atmospheric Oxidation of Sulfur(IV)}}, url = {{http://dx.doi.org/10.1016/S1352-2310(97)00331-2}}, doi = {{10.1016/S1352-2310(97)00331-2}}, volume = {{32}}, year = {{1998}}, }