标题：Ultrasound enhanced heterogeneous activation of peroxymonosulfate by a bimetallic Fe-Co/SBA-15 catalyst for the degradation of Orange II in water作者：Cai, Chun; Zhang, Hui; Zhong, Xing; Hou, Liwei

来源出版物：JOURNAL OF HAZARDOUS MATERIALS 卷：283 页：70-79 DOI：10.1016/j.jhazmat.2014.08.053出版年：FEB 11 2015

摘要：Mesoporous silica SBA-15 supported iron and cobalt (Fe-Co/SBA-15) was prepared and used as catalyst in the ultrasound (US) enhanced heterogeneous activation of peroxymonosulfate (PMS, HSO5-) process. The effects of some important reaction parameters on the removal of Orange II by US/Fe-Co/SBA-15/PMS process were investigated. The results indicated that the removal rate of Orange II was not significantly affected by the initial pH, and it increased with the higher PMS concentration, reaction temperature, Fe-Co/SBA-15 dosage and ultrasonic power. Furthermore, sulfate radicals (SO4-center dot) were assumed to be the dominating reactive species for the Orange II decolorization. Moreover, the Fe-Co/SBA-15 catalyst showed high activity during the repeated experiments. The intermediate products were identified by GC-MS, thereby a plausible degradation pathway is proposed. In addition, the chemical oxygen demand (COD) removal efficiencies at 2 and 24h were 56.8% and 80.1%, respectively and the corresponding total organic carbon (TOC) removal efficiencies were 33.8 and 53.3%. Finally, toxicity tests with activated sludge showed that the toxicity of the solution increased during the first stage and then decreased significantly with the progress of the oxidation.

入藏号：WOS:000347494200009

文献类型：Article

语种：English

作者关键词：Fe-Co/SBA-15, Sulfate radicals, Ultrasound, Peroxymonosulfate, Toxicity

扩展关键词：ZERO-VALENT IRON; AQUEOUS-SOLUTION; HYDROGEN-PEROXIDE; FENTON OXIDATION; FACTORIAL DESIGN; COMMON OXIDANTS; ACID ORANGE-7; RHODAMINE-B; SULFATE; IRRADIATION

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, Xing; 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

ISSN：0304-3894

eISSN:1873-3336