[Characterization and Risk Assessment of VOCs Emissions from Typical Industries in Jiangxi Province].

Abstract

The study further clarified and compared the source emission characteristics of VOCs from different industries by sampling VOCs from a total of 65 enterprises with organized and unorganized emissions from seven typical industries in Jiangxi Province offline and analyzing their components and species by gas chromatography-mass spectrometry （GC-MS）. Meanwhile, the generation potentials of organized and unorganized emissions from different industries for atmospheric ozone and SOA were estimated based on the concentrations of key species of VOCs, and the potential carcinogenic and non-carcinogenic risks of the VOCs species emitted from each industry were evaluated. The results showed significant differences in VOCs emissions from different industries, with relatively low organized and unorganized VOCs emissions from the automobile manufacturing and printing industries, whereas the emissions from the furniture manufacturing industry were significantly higher. Alkanes and OVOCs accounted for a relatively high percentage of the organized emissions in each industry, while aromatics and OVOCs accounted for a relatively high percentage of the unorganized emissions. In addition, the results of ozone formation potential （OFP） calculations showed that the OFPs of the organic chemical industry, plastic products industry, and furniture manufacturing industry were higher, mainly contributed by OVOCs and aromatic hydrocarbons. The secondary organic aerosol （SOA） generation potential of the furniture manufacturing industry was higher than that of the other industries, with benzene as the main contributing species. In the human health risk assessment, acetaldehyde was found to be a high carcinogenic risk substance in all industries, with its most prominent carcinogenic risk in the plastics industry （risk value as high as 3.05×10^-5） and a significant non-carcinogenic risk for acrolein in the pharmaceutical manufacturing industry （HI value as high as 18.96）. Jiangxi Province should focus on olefins, aromatics, and OVOCs emitted by the organic chemical, pharmaceutical manufacturing, plastic products, and furniture manufacturing industries in terms of synergistic control of PM_2.5 and O₃. Additionally, in terms of reducing the impacts on human health, the control of unorganized OVOCs emissions from the furniture manufacturing, plastic products, and organic chemical industries should be strengthened.