Study of degradation of emerging contaminants-Acetaminophen using UV/TiO2

• Main Authors: YANG,TZU-I, 楊子毅
• Other Authors: DING,JIANN-YUAN
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/j5m2cm

碩士 === 輔英科技大學 === 環境工程與科學系碩士班 === 104 === In recent, some emerging contaminants was detected from water bodies.　Acetaminophen is one of them and the main component of Paracetanal, usually was found from sewage effluent. In this study, the degradation of acetaminophen in aqueous solution was estimated by using TiO2 combined with UVA in different temperature, pH, the dosage of TiO2 and time. It was found that just only TiO2 or UVA can't destroy acetaminophen. The removal rate of acetaminophen under 30°C is more than under 25°C. Increase temperature can enhance the degradation of acetaminophen. The removal rate of acetaminophen in lower pH is more than in higher pH. In general, increase the dosage of TiO2 can raise the removal rate of acetaminophen. But the over dosage of TiO2 may reduce the degradation of acetaminophen owing to the hidden effect of UVA. The degradation of acetaminophen with TiO2/UVA is similar to a pseudo first order reaction. The reaction rate constants of acetaminophen with TiO2/UVA under 25 and 30°C are 0.0188min-1 and 0.0288min-1, respectively. They can be converted to reaction rate constants of second order are 14.24M-1•min-1 and 21.82M-1•min-1, respectively. The activation energy of reaction was evaluated as 6.41kj/mole.