环境工程学报2013，Vol.7Issue(1)：191-195,5.
不同条件下Fe(Ⅲ)催化有机酸光化学还原Cr(Ⅵ)的比较研究
Comparative study on Fe(Ⅲ) catalyzed photochemical reduction of Cr(Ⅵ)by organic acids in water under various conditions
摘要
Abstract
In order to provide necessary data for developing Cr (Ⅵ) -contained wastewater treatment process, Fe(Ⅲ) catalyzed photochemical reduction of Cr(Ⅵ) by organic acids in water was comparatively investigated under various conditions. The results showed that the reduction of Cr(Ⅵ) not only was affected by pH, initial concentrations of Fe(Ⅲ) and organic acids, and coexisted cations, but also related to the kind of organic acids. Acidic pH conditions favored the photochemical reduction. Cr(Ⅵ) reduction rate reached 89. 9% through 3 h under pH 3. 0 and it achieved 37. 3% at pH 5. 0. An increase in initial concentration of Fe(Ⅲ) or organic acid promoted Cr(Ⅵ) reduction, and a higher concentration of Fe (Ⅲ) at pH 3. 0 could lead up to 100% Cr(Ⅵ) reduction after 3 h test. The coexisted Al(Ⅲ) or Cu(Ⅱ) would have inhibition on Cr(Ⅵ) reduction. The degree order of Fe(Ⅲ) catalyzed photochemical reduction of Cr(Ⅵ) by three kinds of organic acids were as follows: tartaric acid > citric acid > malic acid. The possible mechanisms of those conditions affecting the photochemical reduction of Cr(Ⅵ) were discussed.关键词
Fe(Ⅲ)/有机酸/Cr(Ⅵ)/光化学还原Key words
ferrum (Ⅲ) / organic acids/ chromium (Ⅵ) / photochemical reduction分类
资源环境引用本文复制引用
陈建,徐林..不同条件下Fe(Ⅲ)催化有机酸光化学还原Cr(Ⅵ)的比较研究[J].环境工程学报,2013,7(1):191-195,5.基金项目
南京师范大学高层次人才引进资助项目(2010611XGQ0058) （2010611XGQ0058）
