Characterization of VOCs emission in automotive industrial park in Chongqing

The emission concentrations, amounts and composition characteristics of volatile organic compounds (VOCs) were investigated from 13 key factories in an automotive industrial park in Chongqing, based on the local standards, i.e. Emission Standrds of Air Pollutants for Surface Coating of Automobile Manuaturing Industry and Emission Standrds of Air Pollutants for Surface Coating of Motocycle and Auto Parts Manuaturing Industry. The results showed that the VOCs concentration of various emission links of the industrial park ranged at 0-243.00 mg∕m ³, with the largest concentration of production being concentrated on the surface coating process. The maximum instantaneous VOCs emission was 141.146 kg∕h, and the VOC emisson from auto parts factories containing surface coating process accounted for 66% of the total emission of the industrial park. The main VOCs matters detected were n-butyl acetate(37%), xylene(30%) and ethylbenzene(18%), and the VOCs species varied with different factories, considerably due to their differences in diluents. Finally, it was proposed that the surface coating of auto parts factories should be the main focus of the environment management in the industrial park.