Secondary aerosol formation and oxidation capacity in photooxidation in the presence of Al2O3 seed particles and SO2
Chu, Biwu; Liu, Tengyu; Zhang, Xiao; Liu, Yongchun; Ma, Qingxin; Ma, Jinzhu; He, Hong; Wang, Xinming; Li, Junhua; Hao, Jiming
刊名SCIENCE CHINA-CHEMISTRY
2015-08
卷号58期号:9页码:1426-1434
关键词secondary aerosol oxidation capacity synergetic promoting effect Al2O3 seed particles sensitivity
英文摘要To investigate the sensitivity of secondary aerosol formation and oxidation capacity to NO (x) in homogeneous and heterogeneous reactions, a series of irradiated toluene/NO (x) /air and alpha-pinene/NO (x) /air experiments were conducted in smog chambers in the absence or presence of Al2O3 seed particles. Various concentrations of NO (x) and volatile organic compounds (VOCs) were designed to simulate secondary aerosol formation under different scenarios for NO (x) . Under "VOC-limited" conditions, the increasing NO (x) concentration suppressed secondary aerosol formation, while the increasing toluene concentration not only contributed to the increase in secondary aerosol formation, but also led to the elevated oxidation degree for the organic aerosol. Sulfate formation was suppressed with the increasing NO (x) due to a decreased oxidation capacity of the photooxidation system. Secondary organic aerosol (SOA) formation also decreased with the presence of high concentration of NO (x) , because organoperoxy radicals (RO2) react with NO (x) instead of with peroxy radicals (RO2 or HO2), resulting in the formation of volatile organic products. The increasing concentration of NO (x) enhanced the formation of sulfate, nitrate and SOA under "NO (x) -limited" conditions, in which the heterogeneous reactions played an important role. In the presence of Al2O3 seed particles, a synergetic promoting effect of mineral dust and NO (x) on secondary aerosol formation in heterogeneous reactions was observed in the photooxidation. This synergetic effect strengthened the positive relationship between NO (x) and secondary aerosol formation under "NO (x) -limited" conditions but weakened or even overturned the negative relationship between NO (x) and secondary aerosol formation under "VOC-limited" conditions. Sensitivity of secondary aerosol formation to NO (x) seemed different in homogeneous and heterogeneous reactions, and should be both taken into account in the sensitivity study. The sensitivity of secondary aerosol formation to NO (x) was further investigated under "winter-like" and NH3-rich conditions. No obvious difference for the sensitivity of secondary aerosol formation except nitrate to NO (x) was observed.
研究领域[WOS]Chemistry, Multidisciplinary
WOS记录号WOS:000360645900008
公开日期2016-03-15
内容类型期刊论文
源URL[http://ir.rcees.ac.cn/handle/311016/32483]  
专题生态环境研究中心_大气污染控制中心
推荐引用方式
GB/T 7714
Chu, Biwu,Liu, Tengyu,Zhang, Xiao,et al. Secondary aerosol formation and oxidation capacity in photooxidation in the presence of Al2O3 seed particles and SO2[J]. SCIENCE CHINA-CHEMISTRY,2015,58(9):1426-1434.
APA Chu, Biwu.,Liu, Tengyu.,Zhang, Xiao.,Liu, Yongchun.,Ma, Qingxin.,...&Hao, Jiming.(2015).Secondary aerosol formation and oxidation capacity in photooxidation in the presence of Al2O3 seed particles and SO2.SCIENCE CHINA-CHEMISTRY,58(9),1426-1434.
MLA Chu, Biwu,et al."Secondary aerosol formation and oxidation capacity in photooxidation in the presence of Al2O3 seed particles and SO2".SCIENCE CHINA-CHEMISTRY 58.9(2015):1426-1434.
个性服务
查看访问统计
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。


©版权所有 ©2017 CSpace - Powered by CSpace