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Electrochemical incineration of sulfanilic acid at a boron-doped diamond anode.
Chemosphere. 2012 Jun; 87(10):1126-33.C

Abstract

The anodic oxidation of sulfanilic acid solutions has been studied in acidic medium using a divided cell with a boron-doped diamond (BDD) anode and a stainless steel cathode. Overall mineralization was achieved under all experimental conditions tested due to the efficient destruction of sulfanilic acid and all its by-products with hydroxyl radicals generated at the BDD anode from water oxidation. The alternative use of an undivided cell with the same electrodes gave rise to the coating of the cathode with polymeric compounds, thus preventing the complete electrochemical incineration of sulfanilic acid. The solutions treated in the anodic compartment of the divided cell were degraded at similar rate under pH regulation within the pH interval 2.0-6.0. The mineralization current efficiency was enhanced when the applied current decreased and the initial substrate concentration increased. The decay of sulfanilic acid was followed by reversed-phase HPLC, showing a pseudo first-order kinetics. Hydroquinone and p-benzoquinone were identified as aromatic intermediates by gas chromatography-mass spectrometry and/or reversed-phase HPLC. Maleic, acetic, formic, oxalic and oxamic acids were detected as generated carboxylic acids by ion-exclusion HPLC. Ionic chromatographic analysis of electrolyzed solutions revealed that the N content of sulfanilic acid was mainly released as NH(4)(+) ion and in much smaller proportion as NO(3)(-) ion.

Authors+Show Affiliations

Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.No affiliation info availableNo affiliation info availableNo affiliation info availableNo 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

22365277

Citation

El-Ghenymy, Abdellatif, et al. "Electrochemical Incineration of Sulfanilic Acid at a Boron-doped Diamond Anode." Chemosphere, vol. 87, no. 10, 2012, pp. 1126-33.
El-Ghenymy A, Arias C, Cabot PL, et al. Electrochemical incineration of sulfanilic acid at a boron-doped diamond anode. Chemosphere. 2012;87(10):1126-33.
El-Ghenymy, A., Arias, C., Cabot, P. L., Centellas, F., Garrido, J. A., Rodríguez, R. M., & Brillas, E. (2012). Electrochemical incineration of sulfanilic acid at a boron-doped diamond anode. Chemosphere, 87(10), 1126-33. https://doi.org/10.1016/j.chemosphere.2012.02.006
El-Ghenymy A, et al. Electrochemical Incineration of Sulfanilic Acid at a Boron-doped Diamond Anode. Chemosphere. 2012;87(10):1126-33. PubMed PMID: 22365277.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrochemical incineration of sulfanilic acid at a boron-doped diamond anode. AU - El-Ghenymy,Abdellatif, AU - Arias,Conchita, AU - Cabot,Pere Lluís, AU - Centellas,Francesc, AU - Garrido,José Antonio, AU - Rodríguez,Rosa María, AU - Brillas,Enric, Y1 - 2012/02/25/ PY - 2011/12/13/received PY - 2012/02/01/revised PY - 2012/02/02/accepted PY - 2012/2/28/entrez PY - 2012/3/1/pubmed PY - 2012/7/28/medline SP - 1126 EP - 33 JF - Chemosphere JO - Chemosphere VL - 87 IS - 10 N2 - The anodic oxidation of sulfanilic acid solutions has been studied in acidic medium using a divided cell with a boron-doped diamond (BDD) anode and a stainless steel cathode. Overall mineralization was achieved under all experimental conditions tested due to the efficient destruction of sulfanilic acid and all its by-products with hydroxyl radicals generated at the BDD anode from water oxidation. The alternative use of an undivided cell with the same electrodes gave rise to the coating of the cathode with polymeric compounds, thus preventing the complete electrochemical incineration of sulfanilic acid. The solutions treated in the anodic compartment of the divided cell were degraded at similar rate under pH regulation within the pH interval 2.0-6.0. The mineralization current efficiency was enhanced when the applied current decreased and the initial substrate concentration increased. The decay of sulfanilic acid was followed by reversed-phase HPLC, showing a pseudo first-order kinetics. Hydroquinone and p-benzoquinone were identified as aromatic intermediates by gas chromatography-mass spectrometry and/or reversed-phase HPLC. Maleic, acetic, formic, oxalic and oxamic acids were detected as generated carboxylic acids by ion-exclusion HPLC. Ionic chromatographic analysis of electrolyzed solutions revealed that the N content of sulfanilic acid was mainly released as NH(4)(+) ion and in much smaller proportion as NO(3)(-) ion. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/22365277/Electrochemical_incineration_of_sulfanilic_acid_at_a_boron_doped_diamond_anode_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(12)00183-X DB - PRIME DP - Unbound Medicine ER -