标题：Selective oxidative degradation of toluene for the recovery of surfactant by an electro/Fe2+/persulfate process作者：Long, Anhua; Zhang, Hui
来源出版物：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 卷：22 期：15 页：11606-11616 DOI：10.1007/s11356-015-4406-x 出版年：AUG 2015
摘要：An electro/Fe2+/persulfate process has been conducted for toluene removal from surfactant (SDS) flushing solution, and the pseudo-second-order reaction rate constant (k (2) value) of toluene removal has been optimized by a response surface methodology (RSM). The results indicated that in this process, the reaction between persulfate and externally added Fe2+ generates sulfate-free radicals, and at the same time, Fe2+ is electro-regenerated at the cathode by the reduction of Fe3+. RSM based on Box-Behnken design (BBD) has been applied to analyze the experimental variables, of which the concentrations of persulfate and Fe2+ showed a positive effect on the rate constant of toluene removal, whereas the concentration of SDS showed a negative effect. The interactions between pairs of variables proved to be significant, such as between SDS, persulfate, and Fe2+ concentrations. ANOVA results confirmed that the proposed models were accurate and reliable for analysis of the variables of the electro/Fe2+/persulfate process. The shapes of the 3D response surfaces and contour plots showed that the SDS, persulfate, and Fe2+ concentrations substantially affected the k (2) value of toluene removal. The results indicated that increasing persulfate or Fe2+ concentration increased the k (2) value, whereas increasing SDS concentration decreased the k (2) value. The reaction intermediates have been identified by GC-MS, and a plausible degradation pathway for toluene degradation is proposed.
入藏号：WOS:000358330800037
文献类型：Article
语种：English
作者关键词：Surfactant recovery, Electrochemical treatment, Persulfate, Selective oxidation, Sulfate radical
扩展关键词：ACTIVATED PERSULFATE OXIDATION; ORGANIC-CONTAMINATED SOIL; SITU CHEMICAL OXIDATION; AQUEOUS-SOLUTION; LANDFILL LEACHATE; ELECTRO/FE2+/PEROXYDISULFATE PROCESS; BTEX CONTAMINATION; FENTON OXIDATION; FERROUS ION; WASTE-WATER
通讯作者地址：Zhang, Hui; Wuhan Univ, Dept Environm Engn, Wuhan 430079, Peoples R China.
电子邮件地址：eeng@whu.edu.cn
地址：
[Long, Anhua; Zhang, Hui] Wuhan Univ, Dept Environm Engn, Wuhan 430079, Peoples R China.
[Long, Anhua] Jiangxi Sci & Technol Normal Univ, Nanchang 330013, Jiangxi, Peoples R China.
研究方向：Environmental Sciences & Ecology
ISSN：0944-1344
eISSN：1614-7499
影响因子（2014）：2.828
