摘要
本文模拟大气条件,研究了CH3Br+H2O2+O2,CH3Br+O2,CHBr3+H2O2+O2,和CHBr3+O24个体系的光化学反应。这些体系在253.7nm的紫外光照射下H2O2产生了OH自由基,OH自由基与CH3Br和CHBr3反应,在20m的长光程气体池中用FTIR测量这些反应产物,发现在CH3Br+H2O2+O2和CH3Br+O2体系其光化学反应产物为CO,CO2,CH2O和H2O,对CHBr3+H2O2+O2其光化学反应产物为CO,CO2和H2O,对CHBr3十O2其光化学反应产物为CO和CO2,并从这些产物推出可能发生的光化学反应。
Under simulated atmospheric conditions, thephotochemical reactions were studied in' the foursystems of CH3Br + H2O2 + O2, CH3Br + O2,CHBr3 + H2O2 + O2, and CHBr3 + O2. Irradiatedby UV at 253. 7 urn, H2O2 in these systems wasdecomposed to give OH radical which then reacted with CH3Br and CHBr3. The products of thesereactions were determinated with a FourierTransform infrared Spectroscopy in a 20 m longpath cell. As the prodllcts of photochemical reactions, CO, CO2, CH2O and H2O were detected inboth systems of CH3Br+H2O2+O2 and CH2Br+O2, CO, CO2 and H2O were detected in the system of CHBr3 +H2O2 +O2; and CO and CO2 wrerdetected in the system of CHBr3 +O2. Based onthese products, the photochemical reactionswhich possibly occurred were suggested and reasonable explanations were given.
出处
《环境科学》
CAS
CSSCI
CSCD
北大核心
1995年第6期4-6,共3页
Environmental Science
基金
国家自然科学基金
关键词
光氧化反应
OH自由基
溴代烷烃
photochemical oxidation, OH radical, brominated alkanes.