【摘要】 本文考察了O3、UV、O3/UV、O3/H2O2、H2O2/UV及O3/H2O2/UV等各种氧化技术对水中卤乙酸的氧化去除情况,发现作为高级氧化技术的O3/UV、O3/H2O2、H2O2/UV及O3/H2O2/UV均对卤乙酸有明显的去除效果,其中O3/UV和O3/H2O2/UV的氧化速率高于其他高级氧化工艺。二氯乙酸(DCAA)的分解速率明显高于三氯乙酸(TCAA)。对O3/UV进行的动力学研究,发现反应服从准一级反应动力学模式,在相同的初始溶解臭氧浓度下,DCAA的k’值为TCAA的4～5倍。更多还原

【Abstract】 This paper presents the results of an investigation on the oxidative decomposition of HAAs.O3,UV,O3/UV,O3/ H2O2,H2O2/UV and O3/ H2O2/UV were used for the oxidation of two HAAs,and all of the four advanced oxidation processes(AOPs) including O3/UV,O3/ H2O2,H2O2/UV,and O3/ H2O2/UV could decompose the HAAs;the reaction rate of dichloroacetic acid(DCAA) was much higher than trichloroacetic acid(TCAA).Among all of AOPs,O3/UV and O3/ H2O2/UV demonstrated a relatively high oxidation rate.The decomposition rate of the O3/UV reaction met the pseudo first-order mode,the rate constants of DCAA were 4-5 times higher than TCAA at the same initial dissolved ozone concentrations.更多还原