标题：Electrochemical enhanced heterogeneous activation of peroxydisulfate by Fe-Co/SBA-15 catalyst for the degradation of Orange II in water作者：Cai, Chun; Zhang, Hui; Zhong, Xin; Hou, Liwei

来源出版物：WATER RESEARCH 卷：66 页：473-485 DOI：10.1016/j.watres.2014.08.039 出版年：DEC 1 2014

摘要：Mesoporous silica SBA-15 supported iron and cobalt catalysts (Fe-Co/SBA-15) were prepared and used in the electrochemical (EC) enhanced heterogeneous activation of peroxydisulfate (PDS, S2O82-) process for the removal of Orange II. The effects of some important reaction parameters such as initial pH, current density, PDS concentration and dosage of Fe-Co/SBA-15 catalysts were investigated. The results showed that the decolorization efficiency was not significantly affected by the initial pH value, and it did increase with the higher PDS concentration, current density and Fe-Co/SBA-15 dosage. Both the sulfate radical (SO4-) and the hydroxyl radical ((OH)-O-center dot) are considered as the primary reactive oxidants for the Orange II decolorization. The Fe-Co/SBA-15 catalyst maintained its high activity during repeated batch experiments. The intermediate products were identified by GC-MS analysis and a plausible degradation pathway is proposed accordingly. The removal efficiencies of chemical oxygen demand (COD) and total organic carbon (TOC) were 52.1% and 31.9%, respectively after 60 min of reaction time but reached 82.9% and 51.5%, respectively when the reaction time was extended to 24 h. Toxicity tests with activated sludge indicated that the toxicity of the solution increased during the first 30 min and then decreased as the oxidation proceeded.

入藏号：WOS:000344823500042

文献类型：Article

语种：English

作者关键词：Fe-Co/SBA-15, Sulfate radicals, Electrochemical, Peroxydisulfate, Mineralization

扩展关键词：ZERO-VALENT IRON; ELECTRO-FENTON METHOD; DYE WASTE-WATER; AQUEOUS-SOLUTION; PERSULFATE OXIDATION; AZO DYES; SULFATE RADICALS; PHOTOCATALYTIC DEGRADATION; PHENOLIC CONTAMINANTS; AROMATIC-COMPOUNDS

通讯作者地址：Zhang Hui;Wuhan Univ, Dept Environm Engn, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

电子邮件地址：eeng@whu.edu.cn

地址：

[Cai, Chun; Zhang, Hui; Zhong, Xin; Hou, Liwei] Wuhan Univ, Dept Environm Engn, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

研究方向：Engineering; Environmental Sciences & Ecology; Water Resources

ISSN：0043-1354