硅胶负载邻菲罗啉亚铁类Fenton降解水中罗丹明B

Fenton-like degradation of Rhodamine B in water with silica gel loaded ferrous phenanthroline

采用H2O2为氧化剂,自制硅胶负载邻菲罗啉铁(Ⅱ)配合物[Phen-Fe(Ⅱ)]为催化剂,对罗丹明B(Rh B)进行催化氧化降解.研究了催化剂质量比和用量、H2O2用量、反应温度和反应初始p H等因素对降解率的影响,并对Rh B的降解产物进行了初步分析.结果表明,对于20 mg/L Rh B溶液,当Phen-Fe(Ⅱ)催化剂质量比为1∶1,用量为3 g/L,H2O2用量为0.6 g/L,在40℃和初始p H=11.0的条件下降解6 h,其降解率可达70%.研究表明,Phen-Fe(Ⅱ)具有良好的催化效果.

Silica gel loaded ferrous phenanthroline was prepared as catalyzer to degrade Rhodamine B. The influences of catalyst composer and amount, hydrogen peroxide dosage, reaction temperature and initial pH on Rhodamine B degradation rate were investigated. The degradation products of Rhodamine B were also analyzed. The results showed that the best degradation conditions of Rhodamine B were as follows： the mass ratio of catalyzer was 1 ： 1, Phen-Fe（Ⅱ） 3 g/L, hydrogen peroxide 0.6 g/L, temperature 40 ℃, and pH=11.0. 70% of Rhodamine B was completely removed under the optimum conditions within 6 h for a solution containing 20 mg/L of Rhodamine B. Phen-Fe（ Ⅱ ） had excellent catalytic effect.