Electron-beam induced degradation of bisphenol A  

作　　者：XU Gang REN Hua WU Ming-Hong LIU Ning YUAN Qing TANG Liang WANG Liang 

机构地区：[1]Shanghai Applied Radiation Institute, Shanghai University, Shanghai 200444, China

出　　处：《Nuclear Science and Techniques》2011年第5期277-281,共5页核技术（英文）

基　　金：Supported byNational Natural Science Foundation ofChina(Nos 40973073,40830744,11025526,11175112);National Key TechnologyR&D Programinthe 11th Five-year Plan of China(No.2009BAA24B04);Shanghai Leading Academic Discipline Project(No.S30109)

摘　　要：E-beam degradation of bisphenol A(BPA) was carried out,under reductive condition of ethanol-water solution and oxidative condition of acetonitrile-water solution.The degradation efficiency is higher in oxidative condition than that in reductive condition,and increases with the dose but decreased with increasing initial concentration.The BPA radiolysis follows the pseudo-first-order kinetics.Adding H_2O_2,or neutral condition,does not benefit BPA degradation in oxidative conditions.Pulsed radiolysis was used to investigate mechanism of the BPA radiolysis.The rate constant for BPA reaction with OH(1.85×10^(10) L·mor^(-1)·s^(-1)) is about an order of magnitude higher than that with e_(aq)^-(1.80×l0~9 L·mor^(-1)·s^(-1)).The degradation products were analyzed by ion chromatograph.Smaller molecules such as formic acid and acetic acid were detected,indicating that ^-OH attacks the BPA molecule.The work is of significance for the practical E-beam treatment of waste water containing BPA.E-beam degradation of bisphenol A （BPA） was carried out, under reductive condition of ethanol-water solution and oxidative condition of acetonitrile-water solution. The degradation efficiency is higher in oxidative condition than that in reductive condition, and increases with the dose but decreased with increasing initial concentration. The BPA radiolysis follows the pseudo-first-order kinetics. Adding H202, or neutral condition, does not benefit BPA degradation in oxidative conditions. Pulsed radiolysis was used to investigate mechanism of the BPA radiolysis. The rate constant for BPA reaction with ＇OH （1.85 × 10^10 L.mol^-1 .s^-1） is about an order of magnitude higher than that with e^- aq （1.80×10^9 L.mol^-1.s^-1）. The degradation products were analyzed by ion chromatograph. Smaller molecules such as formic acid and acetic acid were detected, indicating that ＂OH attacks the BPA molecule. The work is of significance for the practical E-beam treatment of waste water containing BPA.

关 键 词：电子束诱导 降解效率 双酚A 乙醇水溶液 氧化条件 反应速率常数 还原条件 一级动力学 

分 类 号：TQ243.12[化学工程—有机化工] TN304.23[电子电信—物理电子学]