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Sci Total Environ

Title:		Stationary monitoring and source apportionment of VOCs in a chemical industrial park by combining rapid direct-inlet MSs with a GC-FID/MS
Author(s):		Huang Y; Gao S; Wu S; Che X; Yang Y; Gu J; Tan W; Ruan D; Xiu G; Fu Q;
Address:		"Shanghai Environmental Protection Key Laboratory on Environmental Standard and Risk Management of Chemical Pollutants, School of Resources & Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, Shanghai 200237, China. Shanghai Environmental Monitoring Center, State Ecologic Environmental Scientific Observation and Research Station at Dianshan Lake, Shanghai 200235, China; Environmental Science and Engineering, Fudan University, Shanghai 200433, China. Shanghai Environmental Monitoring Center, State Ecologic Environmental Scientific Observation and Research Station at Dianshan Lake, Shanghai 200235, China. Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, Oslo 0315, Norway. Department of Chemical Engineering and Analytical Science, The University of Manchester, M13 9PL, UK. Shanghai Environmental Protection Key Laboratory on Environmental Standard and Risk Management of Chemical Pollutants, School of Resources & Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, Shanghai 200237, China. Electronic address: xiugl@ecust.edu.cn"
Journal Title:		Sci Total Environ
Year:		2021
Volume:		20210624
Issue:
Page Number:		148639 -
DOI:		10.1016/j.scitotenv.2021.148639
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Fast and comprehensive monitoring of VOCs, required for air quality management in large-scale chemical industrial parks in China, cannot be accomplished by stationary measurements using conventional GC-FID or GC-MS alone due to their low temporal resolutions and limited detectable ranges. Novel direct-inlet mass spectrometry (DI-MS) has been widely applied for real-time monitoring of VOCs. To verify its applicability in industrial settings, high mass-resolution proton-transfer-reaction time-of-flight MS (HMR-PTR-TOFMS), single-photon ionization time-of-flight MS (SPI-TOFMS), together with online GC-FID/MS were simultaneously deployed at the boundary of one of the largest chemical industrial parks in eastern China. Aromatics, acetonitrile, acetic acid, ethyl acetate, aliphatic hydrocarbons, 1,2-dichloroethane, and acetone were detected as the main pollutants. These three instruments detected 12 common species, among which ethyl acetate, toluene, C8-aromatics, and methyl ethyl ketone showed similar time series and levels. Acetone, benzene, chlorobenzene, styrene, and C9-aromatics showed only similar time series. The HMR-PTR-TOFMS uniquely detected 14 species, mainly oxidized VOCs, nitriles, and amines, which greatly helps acknowledge the pollutants in the chemical industrial area. Positive matrix factorization, using the HMR-PTR-TOFMS and GC-FID/MS datasets, was used to identify eight sources. Four of the identified sources were mainly detected by the HMR-PTR-TOFMS, with pollutants mainly comprised of nitriles, amines, carbonyls, and organic acids, most of which were hazardous and/or odorous. These four sources accounted for 41.5% and 33.2% of the total VOCs and ozone formation potential, respectively. The complementary nature of GC-FID/MS and HMR-PTR-TOFMS in VOC source apportionment in industrial settings is of great practical use for advanced VOCs abatement. Thus, the high mass resolution DI-MSs are suggested to be a supplementary measurement for fence-line monitoring. Although with a relatively short period attempt, this study has wide implications for the fence-line stationary observational modes and source apportion methods combining with traditional observations"
Keywords:		*Air Pollutants/analysis Bays Environmental Monitoring Gas Chromatography-Mass Spectrometry *Volatile Organic Compounds/analysis Chemical industrial park Di-ms Gc-fid/ms Source apportionment VOCs;
Notes:		"MedlineHuang, Yinzhi Gao, Song Wu, Shijian Che, Xiang Yang, Yong Gu, Junjie Tan, Wen Ruan, Dinghua Xiu, Guangli Fu, Qingyan eng Netherlands 2021/07/31 Sci Total Environ. 2021 Nov 15; 795:148639. doi: 10.1016/j.scitotenv.2021.148639. Epub 2021 Jun 24"