Characteristics of volatile organic compound release and kinetics of automotive waste paint sludge
Automotive waste paint sludge(PS)is a hazardous waste produced in the process of automobile painting.PS has a high environmental pollution risk due to the presence of hazardous characteristics such as VOCs,substantial content of heavy metals and low flash point.However,the environmental risk of VOCs released from PS during storage has not been explored.VOCs release characteristics from four typical PS and the release kinetics of VOCs in PS were investigated with environmental test chamber.The results show that the intemal diffusion mechanism of PS dominated the whole release period,the oxygen compounds in the released VOCs were more easily diffused from PS into the air than did the aromatic compounds,and the oil based wet paint sludge(OBWPS)had higher total volatile organic compounds(TVOC)and longer release time.Both cumulative emission mass flux of single VOCs and TVOC were fitted well by first-order kinetic equation with high squared correlation coefficients(R2＞99％).
万方数据
维普
