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Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.atmosenv.2004.02.059
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dc.titleOxidation of elemental mercury by aqueous bromine: Atmospheric implications
dc.contributor.authorWang, Z.
dc.contributor.authorPehkonen, S.O.
dc.date.accessioned2014-10-09T06:56:52Z
dc.date.available2014-10-09T06:56:52Z
dc.date.issued2004-07
dc.identifier.citationWang, Z., Pehkonen, S.O. (2004-07). Oxidation of elemental mercury by aqueous bromine: Atmospheric implications. Atmospheric Environment 38 (22) : 3675-3688. ScholarBank@NUS Repository. https://doi.org/10.1016/j.atmosenv.2004.02.059
dc.identifier.issn13522310
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/89707
dc.description.abstractThe special characteristics of mercury, such as, its long-range atmospheric transport, its transformation between various species, biomagnification and its role as a neurotoxin, make it a pollutant of global concern. The chemical processes that take place in the atmosphere and water systems are closely linked and affect the transport of mercury. The kinetics of aqueous elemental mercury oxidation by aqueous bromine species detected by Dithizone-Hg(II) complexation-UV-VIS spectroscopy was extensively investigated in this study. The second-order oxidation rate constants at room temperature (294-296K) for the Hg(aq) 0-Br2, Hg(aq) 0-HOBr and Hg(aq) 0-OBr- are determined to be 0.20±0.03, 0.28±0.02 and 0.27±0.04M-1s -1, respectively. Such small oxidation rate constants also mean that the important atmospheric "sink" for mercury, which was discovered in the Arctic and sub-Arctic regions, is not caused by aqueous bromine, but other oxidizing bromine species (e.g., gaseous-phase bromine species). © 2004 Elsevier Ltd. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.atmosenv.2004.02.059
dc.sourceScopus
dc.subjectArctic
dc.subjectBromine
dc.subjectDithizone
dc.subjectHypobromous
dc.subjectKinetics
dc.subjectMercury
dc.subjectRedox
dc.subjectStoichiometry
dc.typeArticle
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.description.doi10.1016/j.atmosenv.2004.02.059
dc.description.sourcetitleAtmospheric Environment
dc.description.volume38
dc.description.issue22
dc.description.page3675-3688
dc.description.codenAENVE
dc.identifier.isiut000222214900012
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