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RESEARCH PAPERS

Comparative Study of 2,4-Dichlorophenol Degradation With Different Advanced Oxidation Processes

[+] Author and Article Information
B. Bayarri, O. González, S. Esplugas

Departament d’Engiyeria Química, Facultat de Química,  Universitat de Barcelona, C/Martí i Franquès, 1, 08028-Barcelona, Spain

M. I. Maldonado

 Plataforma Solar de Almería-CIEMAT, Ctra. de Senés, s/n, P.O. Box 22, 04200-Tabernas, Almería, Spain

J. Giménez1

Departament d’Engiyeria Química, Facultat de Química,  Universitat de Barcelona, C/Martí i Franquès, 1, 08028-Barcelona, Spaingimenez@angel.qui.ub.es

1

Author to whom correspondence should be addressed.

J. Sol. Energy Eng 129(1), 60-67 (Jan 30, 2006) (8 pages) doi:10.1115/1.2391174 History: Received June 30, 2005; Revised January 30, 2006

Chlorophenols (CPs) are toxic nonbiodegradable pollutants. In recent decades, several alternative processes for the treatment of these compounds have been investigated. Advanced Oxidation Processes (AOPs) are some of the most promising technologies. Among them, the UV-based AOPs [O3+Fe(II)+UV, photo-Fenton, UV+Fe(III), UV+H2O2, photocatalysis and photolysis] have previously been studied for the degradation of 2,4-dichlorophenol (DCP) in an aqueous solution at laboratory scale. In this paper, these techniques are compared and kinetic constants and pseudoquantum yields are estimated. O3+Fe(II)+UV and photo-Fenton seem to be the most effective. To study scale-up of these processes from the laboratory to a pilot plant operating with sunlight, equivalent photocatalytic experiments were carried out in such installations. The results are promising and show trends similar to those obtained in the laboratory with lamps. The data obtained have been used to calculate some scale-up factors, which have been employed to make a rough estimation of the amount of waste water that can be treated by the solar AOPs studied. The results obtained are encouraging and prove the feasibility of this type of technology.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 3

DCP and DOC removal by means of photocatalysis in laboratory (lab) and pilot plant (PP) scale. DCP0=6.13×10−4mol∕L, cp=0.5gTiO2∕L, free pH (for the rest of the conditions, see Table 1)

Grahic Jump Location
Figure 2

DOC removal by means of different AOPs (for conditions, see Table 1)

Grahic Jump Location
Figure 1

Degradation of initial pollutant by means of different AOPs (for conditions, see Table 1)

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