[Industrial VOCs Emission in Qinhuangdao]

This study established a VOC emissions inventory for Qinhuangdao City using the data on the product yield, raw material use, the concentration of VOCs, the discharge flow, and activities of 609 enterprises. The amount of annual VOC emissions obtained from direct measurements and emission factor methods was 8420.07 t; 48.9% of which was from the economechnological development district, which is the major industrial source of VOCs in the region. Benzene, lipids, alkanes, and ketones were the main industrial VOC components. For important VOC-emitting industries, processing of petroleum, coking, processing of nuclear fuel contributed 30.35% of total VOCs emissions in Qinhuangdao, and manufacture of chemical raw materials, chemical products contributed 14.42%. Solvent use was the most important emission link, which accounted for 37% of total industrial VOCs emissions. About 109 of 609 investigated plants have VOC treatment facilities, 69% of which are based on adsorption technology.