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Indexed by:期刊论文

Date of Publication:2014-11-01

Journal:11th International Conference on Catalysis in Membrane Reactors

Included Journals:SCIE、EI、CPCI-S、Scopus

Volume:236

Issue:PART A

Page Number:121-126

ISSN No.:0920-5861

Key Words:Phenolic wastewater; Electrocatalytic membrane reactor; TiO2/carbon membrane; Electrocatalytic oxidation; Membrane separation

Abstract:An electrocatalytic membrane reactor (ECMR) constituted by TiO2 loading carbon membrane named TiO2/carbon electrocatalytic membrane as an anode and a stainless steel mesh as a cathode has been employed to treat phenolic wastewater. A synthetic phenol wastewater as the feed was prepared by mixing phenol and electrolyte (Na2SO4) with the concentration of 15 g/L. FESEM, XPS, cyclic voltammetry (CV) and high-performance liquid chromatography (HPLC) were used to characterize and analyze the electrocatalytic membrane, phenol concentration and degraded intermediates. The results showed that the removal rate of phenol and TOC reached approximately 99.4 and 86.3% after 2 h treatment at 2.0 mM phenolic wastewater by ECMR, respectively. The main intermediate products of phenol degradation included benzoquinone and organic acids. The efficiency and the degraded intermediates could be controlled by the main parameters of ECMR such as residence time, current density, etc. During the ECMR operation under the conditions of 10.0 mM phenolic wastewater, pH of 6, current density of 0.3 mA/cm2 and residence time of 5.2 min, the achieved phenol removal rate and complete mineralization fraction were 99.96 and 72.4%, respectively. The high efficiency and phenol removal obtained are related to the synergistic effect of the electrochemical oxidation and separation in the reactor. (C) 2014 Elsevier B.V. All rights reserved.