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Microwave activated electrochemical degradation of 2,4-dichlorophenoxyacetic acid at boron-doped diamond electrode.
Chemosphere. 2009 Apr; 75(4):519-25.C

Abstract

A method for improving the oxidation ability of the electrode is proposed by using microwave activation in electrochemical oxidation. The electrochemical degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) with microwave radiation (MW-EC) was carried out in a continuous flow system under atmospheric pressure. In 3 h the removal of COD, ACE (average current efficiency) and Cl(-) concentration was 1.63, 2.25 and 1.67 times as that without microwave radiation, respectively. The high degradation ability was resulted from the more active centers at the electrode surface due to the microwave radiation. The decay kinetics of 2,4-D followed a pseudo first-order reaction. The rate constant was increased to 2.16x10(-4) s(-1) with the microwave radiation, while it was 8.52x10(-5) s(-1) with electrochemical treatment only (EC). Under both conditions, the main intermediates were identified and quantified by High Performance Liquid Chromatography (HPLC). The formation rate of intermediate products and further degradation rate were increased by about 50-120% with the microwave radiation. The activation of electrochemical oxidation by microwave was discussed from the diffusion process, adsorption and the temperature at boron-doped diamond (BDD) electrode.

Authors+Show Affiliations

Department of Chemistry, Tongji University, Shanghai, 200092, China.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

19171363

Citation

Gao, Junxia, et al. "Microwave Activated Electrochemical Degradation of 2,4-dichlorophenoxyacetic Acid at Boron-doped Diamond Electrode." Chemosphere, vol. 75, no. 4, 2009, pp. 519-25.
Gao J, Zhao G, Shi W, et al. Microwave activated electrochemical degradation of 2,4-dichlorophenoxyacetic acid at boron-doped diamond electrode. Chemosphere. 2009;75(4):519-25.
Gao, J., Zhao, G., Shi, W., & Li, D. (2009). Microwave activated electrochemical degradation of 2,4-dichlorophenoxyacetic acid at boron-doped diamond electrode. Chemosphere, 75(4), 519-25. https://doi.org/10.1016/j.chemosphere.2008.12.018
Gao J, et al. Microwave Activated Electrochemical Degradation of 2,4-dichlorophenoxyacetic Acid at Boron-doped Diamond Electrode. Chemosphere. 2009;75(4):519-25. PubMed PMID: 19171363.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Microwave activated electrochemical degradation of 2,4-dichlorophenoxyacetic acid at boron-doped diamond electrode. AU - Gao,Junxia, AU - Zhao,Guohua, AU - Shi,Wei, AU - Li,Dongming, Y1 - 2009/01/25/ PY - 2008/09/28/received PY - 2008/12/08/revised PY - 2008/12/10/accepted PY - 2009/1/28/entrez PY - 2009/1/28/pubmed PY - 2009/6/12/medline SP - 519 EP - 25 JF - Chemosphere JO - Chemosphere VL - 75 IS - 4 N2 - A method for improving the oxidation ability of the electrode is proposed by using microwave activation in electrochemical oxidation. The electrochemical degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) with microwave radiation (MW-EC) was carried out in a continuous flow system under atmospheric pressure. In 3 h the removal of COD, ACE (average current efficiency) and Cl(-) concentration was 1.63, 2.25 and 1.67 times as that without microwave radiation, respectively. The high degradation ability was resulted from the more active centers at the electrode surface due to the microwave radiation. The decay kinetics of 2,4-D followed a pseudo first-order reaction. The rate constant was increased to 2.16x10(-4) s(-1) with the microwave radiation, while it was 8.52x10(-5) s(-1) with electrochemical treatment only (EC). Under both conditions, the main intermediates were identified and quantified by High Performance Liquid Chromatography (HPLC). The formation rate of intermediate products and further degradation rate were increased by about 50-120% with the microwave radiation. The activation of electrochemical oxidation by microwave was discussed from the diffusion process, adsorption and the temperature at boron-doped diamond (BDD) electrode. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/19171363/Microwave_activated_electrochemical_degradation_of_24_dichlorophenoxyacetic_acid_at_boron_doped_diamond_electrode_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(08)01516-6 DB - PRIME DP - Unbound Medicine ER -