Source identification and apportionment of halogenated compounds observed at a remote site in East Asia

TitleSource identification and apportionment of halogenated compounds observed at a remote site in East Asia
Publication TypeJournal Article
Year of Publication2014
AuthorsLi S., Kim J., Park S., Kim S.K, Park M.K, Mühle J, Lee G., Lee M., Jo C.O, Kim K.R
JournalEnvironmental Science & Technology
Volume48
Pagination491-498
Date Published2014/01
Type of ArticleArticle
ISBN Number0013-936X
Accession NumberWOS:000329548800064
Keywordsaerosol; chloroform; emissions; halocarbons; jungfraujoch; methyl-chloride; montreal protocol; positive matrix factorization; river delta region; switzerland
Abstract

The sources of halogenated compounds in East Asia associated with stratospheric ozone depletion and climate change are relatively poorly understood. High-precision in situ measurements of 18 halogenated compounds and carbonyl sulfide (COS) made at Gosan, Jeju Island, Korea, from November 2007 to December 2011 were analyzed by a positive matrix factorization (PMF). Seven major industrial sources were identified from the enhanced concentrations of halogenated compounds observed at Gosan and corresponding concentration-based source contributions were also suggested: primary aluminum production explaining 37% of total Concentration enhancements, solvent usage of which source apportionment is 25%, fugitive emissions from HCFC/HFC production with 11%, refrigerant replacements (9%), semiconductor/electronics industry. (9%), foam blowing agents (6%), and fumigation (3%). Statistical trajectory analysis was applied to specify the potential emission regions for seven sources using back trajectories. Primary aluminum production, solvent usage and fugitive emission sources were mainly contributed by China. Semiconductor/electronics sources were dominantly located in Korea. Refrigerant replacement, fumigation and foam blowing agent sources were spread throughout East Asian countries. The specified potential source regions are consistent with country-based consumptions and emission patterns, verifying the PMF analysis results. The industry-based emission sources of halogenated compounds identified in this study help improve our understanding of the East Asian countries' industrial contributions to halogenated compound emissions.

DOI10.1021/es402776w
Short TitleEnviron. Sci. Technol.
Integrated Research Themes: 
Student Publication: 
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