Electrochemical oxidation of phenolic wastes with boron-doped diamond anodes

被引:368
作者
Cañizares, P [1 ]
Lobato, J [1 ]
Paz, R [1 ]
Rodrigo, MA [1 ]
Sáez, C [1 ]
机构
[1] Univ Castilla La Mancha, Fac Ciencias Quim, Dept Chem Engn, E-13071 Ciudad Real, Spain
关键词
nitrophenols; chlorophenols; hydroxybenzenes; boron-doped diamond; electrochemical oxidation; wastewater treatment;
D O I
10.1016/j.watres.2005.04.042
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The electrochemical oxidation of several phenolic aqueous wastes has been studied using a bench-scale plant with a single-compartment electrochemical flow cell. Boron-doped diamond materials were used as the anode. Complete mineralization of the waste was obtained in the treatment of phenols not substituted with chlorine or nitrogen. Chlorinated phenolic compounds were transformed into carbon dioxide; volatile organochlorinated compounds and nitro-substituted phenols deal with the formation of polymeric materials. These polymeric materials behave as final products or treatment intermediates depending on the nature of the initial pollutant. The removal of nitro- or the chloro-group from the phenolic molecule seems to be one of the first stages in the treatment. Non-nitrogenated or chlorinated carboxylic acids have been found to be the main intermediates in the electrochemical oxidation of all the phenolic compounds tested. The efficiencies of the process depend strongly on the concentration of organic pollutants and on their nature, and not on the current density, at least in the operation range studied. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2687 / 2703
页数:17
相关论文
共 40 条
[1]   Oxidation of aromatic substrates in water/goethite slurry by means of hydrogen peroxide [J].
Andreozzi, R ;
D'Apuzzo, A ;
Marotta, R .
WATER RESEARCH, 2002, 36 (19) :4691-4698
[2]   Anodic destruction of 4-chlorophenol solution [J].
Azzam, MO ;
Al-Tarazi, M ;
Tahboub, Y .
JOURNAL OF HAZARDOUS MATERIALS, 2000, 75 (01) :99-113
[3]   Competitive electrochemical oxidation of p-chlorophenol and p-nitrophenol on Bi-doped PbO2 [J].
Borras, C ;
Laredo, T ;
Scharifker, BR .
ELECTROCHIMICA ACTA, 2003, 48 (19) :2775-2780
[4]   ELECTROCHEMICAL DESTRUCTION OF ANILINE AND 4-CHLOROANILINE FOR WASTE-WATER TREATMENT USING A CARBON-PTFE O-2-FED CATHODE [J].
BRILLAS, E ;
BASTIDA, RM ;
LLOSA, E ;
CASADO, J .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1995, 142 (06) :1733-1741
[5]   Aniline mineralization by AOP's: anodic oxidation, photocatalysis, electro-Fenton and photoelectro-Fenton processes [J].
Brillas, E ;
Mur, E ;
Sauleda, R ;
Sanchez, L ;
Peral, J ;
Domenech, X ;
Casado, J .
APPLIED CATALYSIS B-ENVIRONMENTAL, 1998, 16 (01) :31-42
[6]   Electrochemical oxidation of aqueous phenol wastes on synthetic diamond thin-film electrodes [J].
Cañizares, P ;
Díaz, M ;
Domínguez, JA ;
García-Gómez, J ;
Rodrigo, MA .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2002, 41 (17) :4187-4194
[7]   Electrochemical treatment of 4-nitrophenol-containing aqueous wastes using boron-doped diamond anodes [J].
Cañizares, P ;
Sáez, C ;
Lobato, J ;
Rodrigo, MA .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2004, 43 (09) :1944-1951
[8]   Electrochemical oxidation of polyhydroxybenzenes on boron-doped diamond anodes [J].
Cañizares, P ;
Sáez, C ;
Lobato, J ;
Rodrigo, MA .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2004, 43 (21) :6629-6637
[9]   Electrochemical oxidation of aqueous carboxylic acid wastes using diamond thin-film electrodes [J].
Cañizares, P ;
García-Gómez, J ;
Lobato, J ;
Rodrigo, MA .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2003, 42 (05) :956-962
[10]   Electrochemical oxidation of several chlorophenols on diamond electrodes:: Part II.: Influence of waste characteristics and operating conditions [J].
Cañizares, P ;
García-Gómez, J ;
Sáez, C ;
Rodrigo, MA .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 2004, 34 (01) :87-94