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Electrochemical oxidation of 2,4,5-trichlorophenoxyacetic acid by metal-oxide-coated Ti electrodes.
Chemosphere. 2015 Oct; 136:145-52.C

Abstract

Electrochemical oxidation of 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) over metal-oxide-coated Ti anodes, i.e., Ti/SnO2-Sb/Ce-PbO2, Ti/SnO2-Sb and Ti/RuO2, was examined. The degradation efficiency of over 90% was attained at 20 min at different initial concentrations (0.5-20 mg L(-1)) and initial pH values (3.1-11.2). The degradation efficiencies of 2,4,5-T on Ti/SnO2-Sb/Ce-PbO2, Ti/SnO2-Sb and Ti/RuO2 anodes were higher than 99.9%, 97.2% and 91.5% at 30 min, respectively, and the respective total organic carbon removal ratios were 65.7%, 54.6% and 37.2%. The electrochemical degradation of 2,4,5-T in aqueous solution followed pseudo-first-order kinetics. The compounds, i.e., 2,5-dichlorohydroquinone and 2,5-dihydroxy-p-benzoquinone, have been identified as the main aromatic intermediates by liquid chromatography-mass spectrometry. The results showed that the energy efficiencies of 2,4,5-T (20 mg L(-1)) degradation with Ti/SnO2-Sb/Ce-PbO2 anode at the optimal current densities from 2 to 16 mA cm(-2) ranged from 8.21 to 18.73 kWh m(-3).

Authors+Show Affiliations

State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China.State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China.State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China. Electronic address: junfengn@bnu.edu.cn.Wastewater Technology Division, CSIR, National Environmental Engineering Research Institute, Nagpur, Maharashtra 440020, India.

Pub Type(s)

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

Language

eng

PubMed ID

25981800

Citation

Maharana, Dusmant, et al. "Electrochemical Oxidation of 2,4,5-trichlorophenoxyacetic Acid By Metal-oxide-coated Ti Electrodes." Chemosphere, vol. 136, 2015, pp. 145-52.
Maharana D, Xu Z, Niu J, et al. Electrochemical oxidation of 2,4,5-trichlorophenoxyacetic acid by metal-oxide-coated Ti electrodes. Chemosphere. 2015;136:145-52.
Maharana, D., Xu, Z., Niu, J., & Rao, N. N. (2015). Electrochemical oxidation of 2,4,5-trichlorophenoxyacetic acid by metal-oxide-coated Ti electrodes. Chemosphere, 136, 145-52. https://doi.org/10.1016/j.chemosphere.2015.04.100
Maharana D, et al. Electrochemical Oxidation of 2,4,5-trichlorophenoxyacetic Acid By Metal-oxide-coated Ti Electrodes. Chemosphere. 2015;136:145-52. PubMed PMID: 25981800.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrochemical oxidation of 2,4,5-trichlorophenoxyacetic acid by metal-oxide-coated Ti electrodes. AU - Maharana,Dusmant, AU - Xu,Zesheng, AU - Niu,Junfeng, AU - Rao,Neti Nageswara, Y1 - 2015/05/15/ PY - 2014/11/06/received PY - 2015/04/29/revised PY - 2015/04/30/accepted PY - 2015/5/19/entrez PY - 2015/5/20/pubmed PY - 2016/2/20/medline KW - 2,4,5-Trichlorophenoxyacetic acid KW - Electrochemical oxidation KW - Energy efficiency KW - Ti electrodes SP - 145 EP - 52 JF - Chemosphere JO - Chemosphere VL - 136 N2 - Electrochemical oxidation of 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) over metal-oxide-coated Ti anodes, i.e., Ti/SnO2-Sb/Ce-PbO2, Ti/SnO2-Sb and Ti/RuO2, was examined. The degradation efficiency of over 90% was attained at 20 min at different initial concentrations (0.5-20 mg L(-1)) and initial pH values (3.1-11.2). The degradation efficiencies of 2,4,5-T on Ti/SnO2-Sb/Ce-PbO2, Ti/SnO2-Sb and Ti/RuO2 anodes were higher than 99.9%, 97.2% and 91.5% at 30 min, respectively, and the respective total organic carbon removal ratios were 65.7%, 54.6% and 37.2%. The electrochemical degradation of 2,4,5-T in aqueous solution followed pseudo-first-order kinetics. The compounds, i.e., 2,5-dichlorohydroquinone and 2,5-dihydroxy-p-benzoquinone, have been identified as the main aromatic intermediates by liquid chromatography-mass spectrometry. The results showed that the energy efficiencies of 2,4,5-T (20 mg L(-1)) degradation with Ti/SnO2-Sb/Ce-PbO2 anode at the optimal current densities from 2 to 16 mA cm(-2) ranged from 8.21 to 18.73 kWh m(-3). SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/25981800/Electrochemical_oxidation_of_245_trichlorophenoxyacetic_acid_by_metal_oxide_coated_Ti_electrodes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(15)00458-0 DB - PRIME DP - Unbound Medicine ER -