亚硫酸氢盐
自动氧化
亚硫酸盐
化学
反应速率常数
激进的
水溶液
羟基自由基
光化学
反应机理
无机化学
动力学
有机化学
催化作用
基因表达
DNA甲基化
物理
基因
量子力学
生物化学
作者
Robert E. Huie,P. Neta
标识
DOI:10.1016/0004-6981(87)90113-2
摘要
Rate constants were measured for several radical reactions important in the autoxidation of S(IV) in atmospheric droplets. For the reactions of the hydroxyl radical with sulfite and bisulfite, the rate constants were found to be 5.2 × 1010 and 4.5 × 109 M−1 s−1, respectively. For the reaction of the dichloride radical anion with bisulfite, a rate constant of 3.4 × 108M−1s−1 was obtained. The peroxysulfate radical was found to react with sulfite with a rate constant of 1.3 × 107M−1s−1, but only an upper limit of 3×105 could be derived for its reaction with bisulfite. In some cases, the rate constants are significantly different from those used previously in atmospheric models. The use of these results in a simple model suggests that secondary radical-radical reactions may be of considerable importance in the mechanism of sulfite autoxidation in the atmosphere.
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