| Title: | Molecular characterization of atmospheric particulate organosulfates in a port environment using ultrahigh resolution mass spectrometry: Identification of traffic emissions |
| Author(s): | Qi L; Zhang Z; Wang X; Deng F; Zhao J; Liu H; |
| Address: | "State Key Laboratory of Plateau Ecology and Agriculture, College of Eco-environmental Engineering, Qinghai University, Xining 810016, China; State Key Joint Laboratory of ESPC, State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, School of the Environment, Tsinghua University, Beijing 100084, China. State Key Joint Laboratory of ESPC, State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, School of the Environment, Tsinghua University, Beijing 100084, China. State Key Joint Laboratory of ESPC, State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, School of the Environment, Tsinghua University, Beijing 100084, China. Electronic address: liu_env@tsinghua.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2021.126431 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Organosulfates (OSs) are an important component of atmospheric organic aerosol (OA) and are widespread in various environments. However, the OSs generated from anthropogenic emissions are poorly understood. In this study, the molecular compositions of OSs from atmospheric PM(2.5) samples collected during a winter measurement campaign (SEISO-Bohai) at Jingtang Harbor were characterized via ultrahigh resolution mass spectrometry (UHRMS). The changes of port OS compositions were observed in episodes of complete haze pollution. As the pollution aggravated, the relative abundances of OSs were apparently increased, and the molecule compositions became more complex, primarily driven by the oxidation and fragmentation processes. Potential OS precursors from traffic emissions were identified based on an optimized 'OS precursor map' developed in the previous study. OSs characterized by high molecular weights and low degrees of both unsaturation and oxidization were suggested to mainly derive from secondary reactions of intermediate volatile organic compounds (IVOCs) emitted by traffic sources. These OSs were primarily detected in clean-day samples, followed by decreasing with the pollution process. In addition, our study also finds that ship emissions may further facilitated OS productions under haze pollution conditions" |
| Keywords: | Aerosols/analysis Dust Mass Spectrometry *Volatile Organic Compounds/analysis IVOCs Molecular compositions Organosulfates (OSs) Traffic emissions Uhrms; |
| Notes: | "MedlineQi, Lijuan Zhang, Zhining Wang, Xiaotong Deng, Fanyuan Zhao, Junchao Liu, Huan eng Netherlands 2021/06/30 J Hazard Mater. 2021 Oct 5; 419:126431. doi: 10.1016/j.jhazmat.2021.126431. Epub 2021 Jun 18" |
