【摘要】 利用间歇式光反应器,研究了溶液中阴离子HCO3-、Cl-、及NO3-对UV/H2O2氧化4-硝基酚的影响.结果表明,UV/H2O2能有效地除去水溶液中4-硝基酚及TOC.随着HCO3-、Cl-及NO3-浓度的增加,4-硝基酚氧化速率减少.溶液中阴离子对UV/H2O2体系中主要氧化剂OH自由基的清除作用是4-硝基酚降解速率下降的原因.利用一级反应动力学对4-硝基酚的降解进行了拟合,得到了满意的结果.更多还原

【Abstract】 The effect of anions HCO3-, Cl- and NO3- in aqueous solution on the degradation of 4-nitrophenol by UV/H2O2 process was studied by using a batch photo-reactor. The results showed that 4-nitrophenol and TOC could be removed effectively by the UV/H2O2 process. The oxidation rate of 4-nitrophenol decreased with the increase of the amount of HCO3-, Cl- and NO3- due to the reason that the oxidation rate of 4-nitrophenol decreased was the scavenging of anions in solution on the main oxidant free radical OH in the UV/H2O2 system. The first-order kinetics was employed to describe the degradation of 4-nitrophenol and a satisfactory result was obtained.更多还原