摘要
In the interest of accelerating aniline degradation, Fe2+ and chelated Fe2+ activated persulfate oxidations were investigated in neutral pH condition. Three kinds of chelating agents were selected including citric acid, oxalic acid and ethylenediamine tetraaceatate(EDTA) to maintain available Fe2+. The results indicate that the concentration of chelating agent and ferrous ion didn't follow a linear relationship with the degradation rate of aniline. A 1/1 ratio of chelating agent/Fe2+ results in a higher degradation rate compared to the results by other ratios. The oxidation enhancement factor using oxalic acid was found to be relatively low. In contrast, citric acid is more suitable chelating agent in the ferrous iron activated persulfate system and aniline exhibits a highest degradation with a persulfate/Fe2+/citric acid/aniline molar ratio of 50/25/25/1 compared to other molar ratios.
In the interest of accelerating aniline degradation, Fe2＋ and chelated Fe2＋ activated persulfate oxidations were investigated in neutral pH condition. Three kinds of chelating agents were selected including citric acid, oxalic acid and ethylenediamine tetraaceatate（EDTA） to maintain available Fe2＋. The results indicate that the concentration of chelating agent and ferrous ion didn＇t follow a linear relationship with the degradation rate of aniline. A 1/1 ratio of chelating agent/Fe2＋ results in a higher degradation rate compared to the results by other ratios. The oxidation enhancement factor using oxalic acid was found to be relatively low. In contrast, citric acid is more suitable chelating agent in the ferrous iron activated persulfate system and aniline exhibits a highest degradation with a persulfate/Fe2＋/citric acid/aniline molar ratio of 50/25/25/1 compared to other molar ratios.
基金
Project(2010B050200007)supported by the Foundation of Science and Technology Planning Project of Guangdong Province,China
Project(2011ZM0054)supported by the Fundamental Research Funds for the Central Universities,China
Project(2011K0013)supported by the Research Fund Program of Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology,China
Project(2012)supported by the Research Funds of Guangdong Provincial Key Laboratory of Atmospheric environment and Pollution Control,China
作者简介
Corresponding author： ZHANG Yong-qing, Professor; Tel： ＋86-20-39380569; Fax： ＋86-20-39380508; E-mail： zhangyq@scut.edu.cn
