DOI: https://doi.org/10.21203/rs.3.rs-31674/v1
In this study, a few important manufacturing industries located in Central Taiwan were studied (n = 13) for the emission of volatile organic compounds (VOCs), relative ozone formation potential (ROFP) and relative carcinogenic risk (RCR). Higher emission factors of total VOCs (∑VOCs) were observed for stencil printing (423 mg-VOC kg-1) compared to other emission sectors. Alkanes formed the most dominant group of VOCs for steel foundry (41.6%), aluminum foundry (25.1%) and synthetic resin manufacturing (25.0%). However, for the chemical sector (synthetic and polyester resin), oxygenated organics like acetone (55.7%) and ethyl acetate (79.7%) were the predominant VOCs. Moreover, emissions from acrylic resin manufacturing had higher contributions from aromatic compounds (> 95%). Toluene was the topmost compound in terms of its contribution to ∑VOCs in plastic tape manufacturing (44.4%), aluminum foundry (39.6%), steel foundry (11.6%), plastic coating (64.3%) and stencil printing (35.3%). Analysis of ozone formation potentials showed that the metal product & machinery acrylic resin manufacturing and stencil printing had a higher normalized ROFP index and belonged to level-I emission sources. However, in terms of the RCR, integrated iron & steel manufacturing had the highest normalized RCR index belonged to level-I emission sources. Level-I represents the most important VOC emission sources.
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