Department of Chemistry, National Institute of Technology, Rourkela 769008, Orissa, India.
J Hazard Mater. 2011 Jan 15;185(1):359-65. doi: 10.1016/j.jhazmat.2010.09.042. Epub 2010 Oct 8.
Rapid decolourization of Methyl Orange by Fenton-like mesoporous Fe(2)O(3)-SiO(2) catalyst has been reported. The effect of various parameters such as initial pH, initial H(2)O(2) concentration, Fe content in the catalyst and initial dye concentration on decolourization process were studied. The results show that 20mg of mesoporous Fe(2)O(3)/SiO(2) composite (with Si/Fe=10) was sufficient to decolourize 0.6 mg/ml of Methyl Orange in presence of 2 ml of H(2)O(2) at an initial pH of 2.93 within 20 min. The pH range for effective decolourization (≥90%) was found to be 1-3. Leaching tests indicated that the activity of the catalyst was almost unaffected up to three consecutive cycles although ≤0.2 ppm of Fe ion was leached into treated water in each run.
芬顿型介孔 Fe(2)O(3)-SiO(2)催化剂能快速实现甲基橙的脱色。研究了初始 pH 值、初始 H(2)O(2)浓度、催化剂中 Fe 含量和初始染料浓度等各种参数对脱色过程的影响。结果表明，在初始 pH 值为 2.93 时，2mlH(2)O(2)存在下，20mg 介孔 Fe(2)O(3)/SiO(2)复合材料（Si/Fe=10）足以在 20min 内使 0.6mg/ml 的甲基橙脱色。有效脱色的 pH 范围（≥90%）被发现为 1-3。浸出试验表明，尽管在每次运行中都有≤0.2ppm 的 Fe 离子浸出到处理水中，但催化剂的活性在三个连续循环中几乎没有受到影响。
