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Selective electrochemical degradation of 4-chlorophenol at a Ti/RuO2-IrO2 anode in chloride rich wastewater.
J Environ Manage. 2017 Apr 01; 190:61-71.JE

Abstract

The electrochemical degradation of 4-chlorophenol (4-CP) in the presence of chlorides by the use of a Ti/RuO2-IrO2 anode was investigated under different operational parameters such as applied current density (J) and chloride concentration ([NaCl]). By performing a design of experiments, a model for the removal of 4-chlorophenol under these circumstances was obtained. To investigate matrix effects for this oxidation process, the influence of various biodegradable substrates (such as glucose, a complex synthetic wastewater and a pilot-scale UASB effluent) on the degradation profile of 4-chlorophenol was investigated. The 4-CP degradation was hardly affected by the presence of glucose, which was itself only limitedly degraded (max. 5%). This indicates a selective degradation for the phenolic compound, independent of the values of the operational parameters. The presence of a more complex synthetic wastewater, however, resulted in a decrease in 4-CP degradation rate up to a factor 7. The biodegradable substrates are in this case also degraded by the electrochemical treatment. In the case where 4-CP was added to a pilot-scale UASB effluent and this wastewater was afterwards treated, the degradation rate of 4-CP only decreased by a factor 2. After 2 h of treatment, a full mineralization was obtained in this experiment. The latter observation suggests the suitability of the technique as an effluent polishing step after a biological treatment or as a treatment in recycle over a biological reactor.

Authors+Show Affiliations

KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, B-2860, Sint-Katelijne-Waver, Belgium.KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, B-2860, Sint-Katelijne-Waver, Belgium.KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, B-2860, Sint-Katelijne-Waver, Belgium.KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, B-2860, Sint-Katelijne-Waver, Belgium. Electronic address: raf.dewil@kuleuven.be.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28039820

Citation

De Coster, Jonas, et al. "Selective Electrochemical Degradation of 4-chlorophenol at a Ti/RuO2-IrO2 Anode in Chloride Rich Wastewater." Journal of Environmental Management, vol. 190, 2017, pp. 61-71.
De Coster J, Vanherck W, Appels L, et al. Selective electrochemical degradation of 4-chlorophenol at a Ti/RuO2-IrO2 anode in chloride rich wastewater. J Environ Manage. 2017;190:61-71.
De Coster, J., Vanherck, W., Appels, L., & Dewil, R. (2017). Selective electrochemical degradation of 4-chlorophenol at a Ti/RuO2-IrO2 anode in chloride rich wastewater. Journal of Environmental Management, 190, 61-71. https://doi.org/10.1016/j.jenvman.2016.11.049
De Coster J, et al. Selective Electrochemical Degradation of 4-chlorophenol at a Ti/RuO2-IrO2 Anode in Chloride Rich Wastewater. J Environ Manage. 2017 Apr 1;190:61-71. PubMed PMID: 28039820.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Selective electrochemical degradation of 4-chlorophenol at a Ti/RuO2-IrO2 anode in chloride rich wastewater. AU - De Coster,Jonas, AU - Vanherck,Wouter, AU - Appels,Lise, AU - Dewil,Raf, Y1 - 2016/12/29/ PY - 2016/08/05/received PY - 2016/11/18/revised PY - 2016/11/23/accepted PY - 2017/1/1/pubmed PY - 2017/3/14/medline PY - 2017/1/1/entrez KW - 4-chlorophenol KW - Electrochemical oxidation KW - Matrix effects KW - Prediction model KW - eAOP SP - 61 EP - 71 JF - Journal of environmental management JO - J Environ Manage VL - 190 N2 - The electrochemical degradation of 4-chlorophenol (4-CP) in the presence of chlorides by the use of a Ti/RuO2-IrO2 anode was investigated under different operational parameters such as applied current density (J) and chloride concentration ([NaCl]). By performing a design of experiments, a model for the removal of 4-chlorophenol under these circumstances was obtained. To investigate matrix effects for this oxidation process, the influence of various biodegradable substrates (such as glucose, a complex synthetic wastewater and a pilot-scale UASB effluent) on the degradation profile of 4-chlorophenol was investigated. The 4-CP degradation was hardly affected by the presence of glucose, which was itself only limitedly degraded (max. 5%). This indicates a selective degradation for the phenolic compound, independent of the values of the operational parameters. The presence of a more complex synthetic wastewater, however, resulted in a decrease in 4-CP degradation rate up to a factor 7. The biodegradable substrates are in this case also degraded by the electrochemical treatment. In the case where 4-CP was added to a pilot-scale UASB effluent and this wastewater was afterwards treated, the degradation rate of 4-CP only decreased by a factor 2. After 2 h of treatment, a full mineralization was obtained in this experiment. The latter observation suggests the suitability of the technique as an effluent polishing step after a biological treatment or as a treatment in recycle over a biological reactor. SN - 1095-8630 UR - https://www.unboundmedicine.com/medline/citation/28039820/Selective_electrochemical_degradation_of_4_chlorophenol_at_a_Ti/RuO2_IrO2_anode_in_chloride_rich_wastewater_ DB - PRIME DP - Unbound Medicine ER -