【摘要】 为降低预氯化过程中产生的消毒副产物带来的饮用水不安全性,探讨高级氧化技术降解消毒副产物中的卤乙酸的效果并进行反应动力学分析.结果表明,当紫外光强为1048μW/cm2,双氧水投加量为70 mg/L,UV/H2O2工艺对二氯乙酸去除率为84.58%,紫外光强为183μW/cm2,双氧水投加量为141.51 mg/L,O3累计投加量为5 mg/L,UV/H2O2/O3工艺对二氯乙酸的去除率为80.37%,分析两种工艺的反应动力学规律,试验拟合反应速率k与双氧水投加量的反应动力学方程模型分别为:k=0.0002[H2O2]和k=0.0008[H2O2]0.5403.更多还原

【Abstract】 Concerning reduction of the carcinogenic risk in drinking water,which come from the disinfection by-products produced in pre-oxidation by chorine process,the effect and kinetics of degradated haloacetic acids by advanced oxidation processes were investigated.The results indicated that the remove efficiencies of UV/H2O2 could be up to 84.58% for dichloroacetic acid under the condition of UV light intensity as 1048 μW/cm2,dosage of H2O2 as 70 mg/L;in the condition of 183 μW/cm2 UV light intensity,dosage of H2O2 as 141.51 mg/L,and cumulative dosage of O3 as 5 mg/L, the remove efficiencies of UV/H2O2/O3 could achieve 80.37% for dichloroacetic acid.Reaction kinetics of the two processes were analyzed,and the fitted equation model between reaction rate constant and dosage of H2O2 was: k=0.0002 and k=0.00080.5403 respectively.更多还原