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Decolorization of dye solution containing Acid Red 14 by electrocoagulation with a comparative investigation of different electrode connections.
J Hazard Mater. 2004 Aug 09; 112(1-2):55-62.JH

Abstract

This study was performed to investigate the variables that influence the efficiency of decolorization of a solution containing an azo dye (Acid Red 14) by electrocoagulation (EC) in order to compare the efficiency of different electrode connections for color removal. Current density, time of electrolysis, interelectrode distance, and pH of the solution were the variables that most influenced color removal. Initially, a simple electrochemical cell was prepared with an anode and a cathode. Then the effect of each variable was studied separately using synthetic wastewater in a batch mode. The efficiency of the method tested was determined by measurement of color removal and reduction of Chemical Oxygen Demand (COD). For dye solutions with COD of approximately 30 ppm and dye concentrations less than 150 ppm, high color removal (93%) was obtained when the pH ranged from 6 to 9, time of electrolysis was approximately 4 min, current density was approximately 80 A/m2, the temperature was approximately 300 K, and interelectrode distance was 1 cm. During the EC process under these conditions, the COD decreased by more than 85%. In the second series of experiment, the efficiency of EC cells with monopolar electrodes in series and parallel connections and an EC cell with bipolar electrodes were compared with results using a simple electrochemical cell. The experimental results showed that an EC cell with several electrodes was more effective than a simple electrochemical cell in color removal. The results also showed that an EC cell with monopolar electrodes had a higher color removal efficiency than an EC cell with bipolar electrodes. Furthermore, within an EC cell, the series connection of the monopolar electrodes was more effective for the treatment process than the parallel connection in color removal.

Authors+Show Affiliations

Water and Wastewater Treatment Research Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran. nezam_daneshvar@yahoo.comNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15225930

Citation

Daneshvar, N, et al. "Decolorization of Dye Solution Containing Acid Red 14 By Electrocoagulation With a Comparative Investigation of Different Electrode Connections." Journal of Hazardous Materials, vol. 112, no. 1-2, 2004, pp. 55-62.
Daneshvar N, Sorkhabi HA, Kasiri MB. Decolorization of dye solution containing Acid Red 14 by electrocoagulation with a comparative investigation of different electrode connections. J Hazard Mater. 2004;112(1-2):55-62.
Daneshvar, N., Sorkhabi, H. A., & Kasiri, M. B. (2004). Decolorization of dye solution containing Acid Red 14 by electrocoagulation with a comparative investigation of different electrode connections. Journal of Hazardous Materials, 112(1-2), 55-62.
Daneshvar N, Sorkhabi HA, Kasiri MB. Decolorization of Dye Solution Containing Acid Red 14 By Electrocoagulation With a Comparative Investigation of Different Electrode Connections. J Hazard Mater. 2004 Aug 9;112(1-2):55-62. PubMed PMID: 15225930.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Decolorization of dye solution containing Acid Red 14 by electrocoagulation with a comparative investigation of different electrode connections. AU - Daneshvar,N, AU - Sorkhabi,H Ashassi, AU - Kasiri,M B, PY - 2002/12/31/received PY - 2004/03/19/revised PY - 2004/03/20/accepted PY - 2004/7/1/pubmed PY - 2004/12/16/medline PY - 2004/7/1/entrez SP - 55 EP - 62 JF - Journal of hazardous materials JO - J Hazard Mater VL - 112 IS - 1-2 N2 - This study was performed to investigate the variables that influence the efficiency of decolorization of a solution containing an azo dye (Acid Red 14) by electrocoagulation (EC) in order to compare the efficiency of different electrode connections for color removal. Current density, time of electrolysis, interelectrode distance, and pH of the solution were the variables that most influenced color removal. Initially, a simple electrochemical cell was prepared with an anode and a cathode. Then the effect of each variable was studied separately using synthetic wastewater in a batch mode. The efficiency of the method tested was determined by measurement of color removal and reduction of Chemical Oxygen Demand (COD). For dye solutions with COD of approximately 30 ppm and dye concentrations less than 150 ppm, high color removal (93%) was obtained when the pH ranged from 6 to 9, time of electrolysis was approximately 4 min, current density was approximately 80 A/m2, the temperature was approximately 300 K, and interelectrode distance was 1 cm. During the EC process under these conditions, the COD decreased by more than 85%. In the second series of experiment, the efficiency of EC cells with monopolar electrodes in series and parallel connections and an EC cell with bipolar electrodes were compared with results using a simple electrochemical cell. The experimental results showed that an EC cell with several electrodes was more effective than a simple electrochemical cell in color removal. The results also showed that an EC cell with monopolar electrodes had a higher color removal efficiency than an EC cell with bipolar electrodes. Furthermore, within an EC cell, the series connection of the monopolar electrodes was more effective for the treatment process than the parallel connection in color removal. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/15225930/Decolorization_of_dye_solution_containing_Acid_Red_14_by_electrocoagulation_with_a_comparative_investigation_of_different_electrode_connections_ DB - PRIME DP - Unbound Medicine ER -