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DOI | 10.5194/acp-19-1649-2019 |
Physical properties of secondary photochemical aerosol from OH oxidation of a cyclic siloxane | |
Janechek, Nathan J.1,2; Marek, Rachel F.2; Bryngelson, Nathan1,2,4; Singh, Ashish1,2,5; Bullard, Robert L.1,2,6; Brune, William H.3; Stanier, Charles O.1,2 | |
2019-02-08 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:3页码:1649-1664 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | Cyclic volatile methyl siloxanes (cVMS) are high-production chemicals present in many personal care products. They are volatile, hydrophobic, and relatively long-lived due to slow oxidation kinetics. Evidence from chamber and ambient studies indicates that oxidation products may be found in the condensed aerosol phase. In this work, we use an oxidation flow reactor to produce similar to 100 mu g m(-3) of organosilicon aerosol from OH oxidation of decamethylcyclopentasiloxane (D-5) with aerosol mass fractions (i.e., yields) of 0.2-0.5. The aerosols were assessed for concentration, size distribution, morphology, sensitivity to seed aerosol, hygroscopicity, volatility and chemical composition through a combination of aerosol size distribution measurement, tandem differential mobility analysis, and electron microscopy. Similar aerosols were produced when vapor from solid antiperspirant was used as the reaction precursor. Aerosol yield was sensitive to chamber OH and to seed aerosol, suggesting sensitivity of lower-volatility species and recovered yields to oxidation conditions and chamber operation. The D-5 oxidation aerosol products were relatively non-hygroscopic, with an average hygroscopicity kappa of similar to 0.01, and nearly non-volatile up to 190 degrees C temperature. Parameters for exploratory treatment as a semi-volatile organic aerosol in atmospheric models are provided. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000458116900001 |
WOS关键词 | CLOUD CONDENSATION NUCLEI ; PERSONAL CARE PRODUCTS ; GAS-PHASE REACTIONS ; VOLATILE METHYLSILOXANES ; FLOW REACTORS ; ORGANOSILICON COMPOUNDS ; RESOLVED MEASUREMENTS ; CHEMICAL-COMPOSITION ; RADICAL CHEMISTRY ; SMOG CHAMBER |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29511 |
专题 | 地球科学 |
作者单位 | 1.Univ Iowa, Dept Chem & Biochem Engn, Iowa City, IA 52242 USA; 2.Univ Iowa, IIHR Hydrosci & Engn, Iowa City, IA 52242 USA; 3.Penn State Univ, Dept Meteorol & Atmospher Sci, University Pk, PA 16802 USA; 4.Yokogawa Corp Amer, Newnan, GA USA; 5.Inst Adv Sustainabil Studies, D-14467 Potsdam, Germany; 6.Lovelace Resp Res Inst, Albuquerque, NM USA |
推荐引用方式 GB/T 7714 | Janechek, Nathan J.,Marek, Rachel F.,Bryngelson, Nathan,et al. Physical properties of secondary photochemical aerosol from OH oxidation of a cyclic siloxane[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(3):1649-1664. |
APA | Janechek, Nathan J..,Marek, Rachel F..,Bryngelson, Nathan.,Singh, Ashish.,Bullard, Robert L..,...&Stanier, Charles O..(2019).Physical properties of secondary photochemical aerosol from OH oxidation of a cyclic siloxane.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(3),1649-1664. |
MLA | Janechek, Nathan J.,et al."Physical properties of secondary photochemical aerosol from OH oxidation of a cyclic siloxane".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.3(2019):1649-1664. |
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