光Fenton体系氧化降解水中孔雀石绿的研究

进行了光Fenton体系催化氧化降解染料孔雀石绿(MG)水溶液的研究，考察了光、pH值、Fe2+和H2O2投加量等因素以及阴离子的存在对MG降解率的影响。结果表明，室温（20 OC）下，pH=3.5±0.1、Fe2+]0=0.25mmol/L、H2O2]0=0.5mmol/L的条件下，经氙灯（λ > 290 nm）照射30 min后，MG水溶液（15 mg/L）的降解率达到95%以上。Cl-的存在对MG在光Fenton体系中的降解有阻碍作用，SO42-的存在对反应基本没影响，而NO3-促进了MG的氧化降解速率。

Oxidation of Malachite Green in Aqueous Solution by Photo/Fenton’s Reagent

The degradation of malachite green （MG） in aqueous solution by photo Fenton＇ s rea- gent was studied, and the influence of various factors, such as light, pH values, concentrations of Fe2＋ and H2O2, etc. , and the presence of anions on the effect of MG removal was investiga- ted. The results show that the degradation rate of MG （15 mg·L-1） is over 95 % after 30 min with Xe lamp irradiation （ λ 〉 290 nm） under the experimental conditions of pH = 3.5±0. 1, FeZ＋]0= 0.25 mmol·L-1, H2O2]0 = 0.5 mmol·L-1 at room temperature （20 ℃）. The degradation of MG by photo - Fenton＇ s reagent is inhibited by the presence of Cl , and no effect is observed in the presence of SO42- , while the rate of MG removal is increased in the presence of NO3 -.