Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要:
It has been discovered for the first time that gaseous ozone in the presence of carbon dioxide and water vapor interacts with crystalline potassium bromide giving gaseous Br2and solid salts KHCO3and KBrO3. Molecular bromine and hydrocarbonate ion are the products of one and the same reaction described by the stoichiometric equation 2KBr(cr.)�+�O3(gas)�+�2CO2(gas)�+�H2O(gas) → 2KHCO3(cr.)�+�Br2(gas)�+�O2(gas). The dependencies of Br2, KHCO3and KBrO3formation rates on the concentrations of O3and CO2, humidity of initial gas mixture, and temperature have been investigated. A kinetic scheme has been proposed that explains the experimental regularities found in this work on the quantitative level. According to the scheme, the formation of molecular bromine and hydrocarbonate is due to the reaction between hypobromite BrO−, the primary product of bromide oxidation by ozone, with carbon dioxide and water; bromate results from consecutive oxidation of bromide ion by ozone Br−→+O3,−O2BrO−→+O3,−O2BrO2 −→+O3,−O2BrO3 −. � 2016 Elsevier Ltd
Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskiye Gory 1, Building 3, Moscow, Russian Federation; A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prospect 29, Moscow, Russian Federation
Recommended Citation:
Levanov A,V,, Isaikina O,et al. Interaction of ozone and carbon dioxide with polycrystalline potassium bromide and its atmospheric implication[J]. Atmospheric Environment,2017-01-01,152