| Summary: | 碩士 === 國立中山大學 === 環境工程研究所 === 104 === Specific volatile organic compounds (VOCs) may contribute from several pollution sources and one of the difficult issues in air pollution problems is to trace the primary source(s).
This study contains analysis of OP-FTIR (Open-path Fourier transform infrared) monitoring and weather stations in areas surrounding an industrial park located in Kaohsiung City by utilizing long-term monitoring data in 2013. Results found that ambient vinyl acetate (VA) concentrations exceeded olfactory thresholds, with higher frequencies occurred in the perimeter zone. Two factories, namely A and B used VA with permissible maximum annual rates of 222,000 and 157.950 tones, respectively. Analysis of wind rose plots found that southern and southeast wind frequencies (3.87%) occurred more than eastern and southeast ones (3.48%). Analysis also found that VA was mostly detected in the southeast and southern corner area where factory A locates. Analysis of the inverse locus from quarters one through four of 2013 found that the fixed OP-FTIR monitoring station’s VA readings saw the vector trajectory met at factory A. The analysis proves that the primary VA source was factory A. With a mobile OP-FTIR setup at the southern and southeast perimeter of factory A, it was found that the pollution source was manufacture process M01 and a maximum VA concentration of 3770 ppb and a maximum frequency of 92.9% were recorded. Around 51% of the VA values exceeded the regulated maximum value.
Factory A reduced its VA emission in 2014. After the reduction, it was found that the ambient monthly VA concentrations decreased from 9.77 ppb in 2013 to 1.96 ppb in 2015 in the target area, with similar weather conditions in the two years. By the verification, it has been confirmed that factory A is the primary source of VA pollution and that this study has established a reliable model to trace pollution sources.
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