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Measurement of hydrogen peroxide and organic hydroperoxide concentrations during autumn in Beijing, China 被引量:2
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作者 Qingyu Zhang Jiaoyu Liu +9 位作者 Youjiang He Jiaying Yang Jian Gao Houfeng Liu Wei Tang Yizhen Chen Wenhao Fan Xuan Chen Fahe Chai Shiro Hatakeyama 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2018年第2期72-81,共10页
Gaseous peroxides play important roles in atmospheric chemistry. To understand the pathways of the formation and removal of peroxides, atmospheric peroxide concentrations and their controlling factors were measured fr... Gaseous peroxides play important roles in atmospheric chemistry. To understand the pathways of the formation and removal of peroxides, atmospheric peroxide concentrations and their controlling factors were measured from 7:00 to 20:00 in September, October, and November 2013 at a heavily trafficked residential site in Beijing, China, with average concentrations of hydrogen peroxide(H2O2) and methyl hydroperoxide(MHP) at 0.55 ppb and 0.063 ppb, respectively. H2O2 concentrations were higher in the afternoon and lower in the morning and evening, while MHP concentrations did not exhibit a regular diurnal pattern. Both H2O2 and MHP concentrations increased at dusk in most cases. Both peroxides displayed monthly variations with higher concentrations in September. These results suggested that photochemical activity was the main controlling factor on variations of H2O2 concentrations during the measurement period. Increasing concentrations of volatile organic compounds emitted by motor vehicles were important contributors to H2O2 and MHP enrichment. High levels of H2O2 and MHP concentrations which occurred during the measurement period probably resulted from the transport of a polluted air mass with high water vapor content passing over the Bohai Bay, China. 展开更多
关键词 PEROXIDE Formation Controlling factor Volatile organic compound transport of polluted air mass
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