ABSTRACT
Volatile organic compounds (VOCs) are one of the major groups of atmospheric pollutants. It has been well known that VOCs have adverse effects on human health, cause odorous nuisances, and participate in photochemical reactions. Surveys of VOCs have shown that vehicle exhausts are the dominant sources of emissions, especially in urban areas, accounting for one half to two thirds of total emitted VOCs. The purification of industrial waste gases containing VOCs plays an important role in chemical engineering (Chen et al. 2006a,b; Chen et al. 2005; Salden and Eigenberger, 2001).
