Uptake kinetics of three epoxides into sulfuric acid solution
文献类型：期刊论文
| 作者 | Wang, Tianhe1,2; Liu, Ze1; Wang, Weigang1; Ge, Maofa1 |
| 刊名 | ATMOSPHERIC ENVIRONMENT
 |
| 出版日期 | 2012-09-01 |
| 卷号 | 56页码:58-64 |
| 关键词 | Epoxides Sulfuric Acid Reactive Uptake Coefficients |
| ISSN号 | 1352-2310 |
| DOI | 10.1016/j.atmosenv.2012.04.001 |
| 英文摘要 | This work presents a study of the uptake of isoprene epoxide, butadiene epoxide (BMO) and butadiene diepoxide (BDO) into sulfuric acid solutions which helps to understand the reactivity of epoxides existing in the atmosphere toward acidic aerosols. The uptake of these three compounds into 0-30 wt % H2SO4 solutions were measured using a rotated wetted-wall reactor (RWW) coupled to a single-photon ionization time of flight mass spectrometer (SPI-TOFMS). The epoxides were found to be very easily taken up by H2SO4 solutions even in dilute concentrations of pH levels. Isoprene epoxide was found to partition reversibly into solution at pH = 4, whereas irreversible uptake was observed when pH <= 3. We reported the reactive uptake coefficients from 1.87 x 10(-5) to 2.67 x 10(-3) for pH = 3-20 wt % H2SO4 solutions. A chemical reaction for isoprene epoxide was responsible for the reactive uptake. By means of mass spectrometry, gas chromatography and FTIR spectroscopy, a gas product was identified to be 2-methyl-3-butenal. The uptake behavior of butadiene epoxide was similar with that of isoprene epoxide, while butadiene diepoxide partitioned irreversibly over the whole acidity range of 0-30 wt %, and the reactive uptake coefficients increased slightly (0.849 x 10(-4)-1.36 x 10(-4)) from pure water to pH = 1. The reactivity that displayed close dependence on the hydrolysis rates of the three epoxides was analyzed and compared according to their molecular structural differences. The atmospheric lifetimes were calculated and atmospheric implication was discussed based on the corresponding reactive uptake coefficients. (C) 2012 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000306347900008 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/47237]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Ge, Maofa |
| 作者单位 | 1.Chinese Acad Sci, BNLMS, State Key Lab Struct Chem Unstable & Stable Speci, Inst Chem, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Tianhe,Liu, Ze,Wang, Weigang,et al. Uptake kinetics of three epoxides into sulfuric acid solution[J]. ATMOSPHERIC ENVIRONMENT,2012,56:58-64. |
| APA | Wang, Tianhe,Liu, Ze,Wang, Weigang,&Ge, Maofa.(2012).Uptake kinetics of three epoxides into sulfuric acid solution.ATMOSPHERIC ENVIRONMENT,56,58-64. |
| MLA | Wang, Tianhe,et al."Uptake kinetics of three epoxides into sulfuric acid solution".ATMOSPHERIC ENVIRONMENT 56(2012):58-64. |
入库方式： OAI收割
来源：化学研究所
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