模拟太阳光条件下草酸钠 Fenton试剂降解苯酚

采用氙灯模拟自然条件下的太阳光, 研究了苯酚在草酸钠 Fenton反应体系作用下 的降解规律. 对光源、 H₂O₂、C₂O^2-₄、Fe^{2+的初始浓度以及pH 值对苯酚的去除率的影响进行了探讨. 结果表明， C₂O2-₄能有效强化Fenton试剂对苯酚的作用， 在初始pH值为4、 过氧化氢浓度为0.735 1 mmol/L、 草酸钠浓度为0.074 63 mmol/L、 亚铁离子浓度为0.053 6 mmol/L时, 溶液中0.595 2 mmol/L苯酚在90 min的降解率可达76.5%， 其降解过程符合一级动力学方程. GC MS分析表明， 苯酚降解的中间产物主要为苯醌和有机酸.}

Degradation of Phenol by Sodium Oxalate-Fenton Reagent under Simulated Sunlight

Degradation of phenol irradiated with a xenon lamp was studied in the presence of sodium oxalate-Fenton reagent.Effects of light,the initial concentrations of H_2O_2,C_2O~(2-)_4,(Fe~(2 )) and pH value on the(reactions) were investigated.The result shows that(C_2O~(2-)_4) can effectively intensify the effect of the Fenton(reagent,) and under the following conditions,that is,pH=4.0,c(H_2O_2)=0.735 1 mmol/L,c(Na_2C_2O_4)=(0.074 63 mmol/L,)(c(Fe~(2 ))=)0.053 6 mmol/L,the degradation rate of phenol with a mass concentration of 0.595 2 mmol/L was(76.5%) under simulated sunlight irradiation for(90 min) and the(degradation) course(obeyed) the one order kinetic equation.The main intermediates were also identified by(GC-MS,) and they were organic acid and benzoquinone.