title: Volatile organic compound identification and characterization by PCA and mapping at a high-technology science park.
abstract: High-technology industries have grown continuously in Taiwan and elsewhere in the world. Volatile organic compounds (VOCs) comprise the highest percentage of emissions in these industries. The objectives of this study were to identify VOC sources and to apportion their contributions by using a three-step approach. These included estimating concentration distributions, performing principal component analysis (PCA), and mapping concentration contours. The results showed that the dominant compound groups were aromatic and aliphatic compounds. The PCA resolved four emission sources: vehicular traffic, industrial solvents, waste water plants, and cleaning/degreasing agents. Spatial distributions showed that concentrations of vehicular traffic-related compounds (benzene and isooctane) were highest at the entrances to the science park, and strongly related to traffic volume, and that the emissions of industry-related compounds (xylene and ethylbenzene) were closest to the associated sources. This study provided an accurate, practical and efficient method of characterizing emission sources in an industrial complex.
authors.affiliation: Department of Occupational Safety and Health, Chung-Hwa University of Medical Technology, No. 89, Wenhwa 1st St., Rende Dist., Tainan 717, Taiwan. Electronic address: hang@mail.hwai.edu.tw.
authors.forename: Cheng-Hang
authors.initials: CH
authors.lastname: Lan
authors.affiliation: Department of Safety, Health and Environmental Engineering, National Kaohsiung First University of Science and Technology, No. 1, University Rd., Yanchao Dist., Kaohsiung 811, Taiwan. Electronic address: ylhuang@ccms.nkfust.edu.tw.
authors.forename: Yu-Li
authors.initials: YL
authors.lastname: Huang
authors.affiliation: Department of Occupational Safety and Health, Chung-Hwa University of Medical Technology, No. 89, Wenhwa 1st St., Rende Dist., Tainan 717, Taiwan. Electronic address: digimahoo@yahoo.com.tw.
authors.forename: Sheng-Huei
authors.initials: SH
authors.lastname: Ho
authors.affiliation: Department of Public Health, Kaohsiung Medical University, No. 100, Shih-Chuan 1st Rd., Sang Ming Dist., Kaohsiung 807, Taiwan. Electronic address: pengcy@kmu.edu.tw.
authors.forename: Chiung-Yu
authors.initials: CY
authors.lastname: Peng
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001554:Benzene / Q000032:analysis; D001555:Benzene Derivatives / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods*; D025341:Principal Component Analysis; D013624:Taiwan; D055549:Volatile Organic Compounds / Q000032:analysis*; D014992:Xylenes / Q000032:analysis
chemical_list: D000393:Air Pollutants; D001555:Benzene Derivatives; D055549:Volatile Organic Compounds; D014992:Xylenes; D001554:Benzene; C004912:ethylbenzene
keywords: Aromatics; Chlorinated compounds; Principal component analysis (PCA); Spatial distribution