Photochemical conversion of toluene in simulated atmospheric matrix and characterization of large molecular weight products by plus APPI FT-ICR MS
文献类型：期刊论文
| 作者 | Liu, Yalu; Li, Qianqian; Su, Guijin; Wei, Da; Zheng, Minghui; Gao, Lirong; Liu, Wenbin; Liu, Guorui
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2019-02-01 |
| 卷号 | 649页码:111-119 |
| 关键词 | Toluene NO O-3 Kinetic rate constants FT-ICR MS |
| ISSN号 | 0048-9697 |
| 英文摘要 | The lack of kinetic parameters of VOC photochemical conversion especially in the presence of NO and O-3, and product information, will result in the incomplete understanding for the occurrence of haze. In the present study, the photochemical conversion of toluene, one of most significant hydrocarbons of VOCs, in toluene, toluene/NO, toluene/O-3 and reaction systems was assessed for up to 4 days in a smog chamber at 278 K and 308 K. The results indicated that the addition of NO and O-3 promoted the conversion of toluene. The first-order kinetic rate constants of toluene assessed in the toluene reaction system at 278 K and 308 K were 0.12 and 0.19 day(-1), respectively. The second-order kinetic rate constants of toluene assessed in the toluene/NO were 0.1 x 10(-13) cm(3) molecule(-1) day(-1) (at 278 K) and 0.9 x 10(-13) cm(3) molecule(-1) day(1) (at 308 K), and those in the toluene/O-3 reaction systems were 0.06 x 10(-12) cm(3) molecule(-1) day(-1) (at 278 K) and 0.11 x 10(-12) cm(3) molecule(-1) day(-1) (at 308 K). The small difference of second-order kinetic rate constants between 278 K and 308 K obtained for the toluene/O-3 system when compared with the toluene/NO system indicated the reduced reaction sensitivity of O-3 to the temperature. Several dozens of large molecule products containing up to O-6 heteroatoms were identified by positive ion atmospheric pressure photoionization (+APPI) coupled with Fourier transform ion cydotron resonance mass spectrometry (FT-ICR MS), with double bond equivalents up to 18, and carbon numbers ranging within 12-38, respectively. The findings presented herein may provide a new train of thought for the photochemical reaction process of toluene and its conversion in ambient air. (C) 2018 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/42989]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Environm Nanotechnol & Hlth Effects, Res Ctr Ecoenvironm Sci, POB 2871, Beijing 100085, Peoples R China 2.Chinese Acad Sci, State Key Lab Environm Chem & Ecotoxicol Res, Res Ctr Ecoenvironm Sci, POB 2871, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yalu,Li, Qianqian,Su, Guijin,et al. Photochemical conversion of toluene in simulated atmospheric matrix and characterization of large molecular weight products by plus APPI FT-ICR MS[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,649:111-119. |
| APA | Liu, Yalu.,Li, Qianqian.,Su, Guijin.,Wei, Da.,Zheng, Minghui.,...&Liu, Guorui.(2019).Photochemical conversion of toluene in simulated atmospheric matrix and characterization of large molecular weight products by plus APPI FT-ICR MS.SCIENCE OF THE TOTAL ENVIRONMENT,649,111-119. |
| MLA | Liu, Yalu,et al."Photochemical conversion of toluene in simulated atmospheric matrix and characterization of large molecular weight products by plus APPI FT-ICR MS".SCIENCE OF THE TOTAL ENVIRONMENT 649(2019):111-119. |
入库方式： OAI收割
来源：生态环境研究中心
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