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Degradation of atrazine by electrochemical advanced oxidation processes using a boron-doped diamond anode.
J Phys Chem A. 2010 Jun 24; 114(24):6613-21.JP

Abstract

Solutions of 30 mg L(-1) of the herbicide atrazine have been degraded by environmentally friendly electrochemical advanced oxidation processes (EAOPs) such as anodic oxidation (AO), electro-Fenton (EF), and photoelectro-Fenton (PEF) using a small open and cylindrical cell with a boron-doped diamond (BDD) anode. AO has been carried out either with a stainless steel cathode or an O(2) diffusion cathode able to generate H(2)O(2). Hydroxyl radicals ((*)OH) formed at the BDD surface in all EAOPs and in the bulk from Fenton's reaction between added Fe(2+) and electrogenerated H(2)O(2) in EF and PEF are the main oxidants. All treatments yielded almost overall mineralization, although the rate for total organic carbon (TOC) removal is limited by the oxidation of persistent byproducts with (*)OH at the BDD surface. In AO, TOC abatement is enhanced by parallel electrochemical reduction of organics at the stainless steel cathode, while in PEF, it also increases from additional photolysis of intermediates by UVA light under the synergistic action of (*)OH in the bulk. The effect of current and pH on the degradative behavior of EAOPs has been examined to determine their optimum values. Atrazine decay always follows a pseudo-first-order reaction, being more rapidly destroyed from (*)OH in the bulk than at the BDD surface. Aromatic intermediates such as desethylatrazine, desethyldesisopropylatrazine, and cyanuric acid and short linear carboxylic acids such as formic, oxalic, and oxamic have been identified and quantified by reversed-phase and ion-exclusion HPLC, respectively. Released inorganic ions such as Cl(-), NO(3)(-), and NH(4)(+) have been followed by ionic chromatography.

Authors+Show Affiliations

Unitat de Química Industrial, Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona, Universitat Politècnica de Catalunya, Comte d'Urgell 187, 08036 Barcelona, Spain.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

20507135

Citation

Borràs, Núria, et al. "Degradation of Atrazine By Electrochemical Advanced Oxidation Processes Using a Boron-doped Diamond Anode." The Journal of Physical Chemistry. A, vol. 114, no. 24, 2010, pp. 6613-21.
Borràs N, Oliver R, Arias C, et al. Degradation of atrazine by electrochemical advanced oxidation processes using a boron-doped diamond anode. J Phys Chem A. 2010;114(24):6613-21.
Borràs, N., Oliver, R., Arias, C., & Brillas, E. (2010). Degradation of atrazine by electrochemical advanced oxidation processes using a boron-doped diamond anode. The Journal of Physical Chemistry. A, 114(24), 6613-21. https://doi.org/10.1021/jp1035647
Borràs N, et al. Degradation of Atrazine By Electrochemical Advanced Oxidation Processes Using a Boron-doped Diamond Anode. J Phys Chem A. 2010 Jun 24;114(24):6613-21. PubMed PMID: 20507135.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation of atrazine by electrochemical advanced oxidation processes using a boron-doped diamond anode. AU - Borràs,Núria, AU - Oliver,Ramon, AU - Arias,Conchita, AU - Brillas,Enric, PY - 2010/5/29/entrez PY - 2010/5/29/pubmed PY - 2010/5/29/medline SP - 6613 EP - 21 JF - The journal of physical chemistry. A JO - J Phys Chem A VL - 114 IS - 24 N2 - Solutions of 30 mg L(-1) of the herbicide atrazine have been degraded by environmentally friendly electrochemical advanced oxidation processes (EAOPs) such as anodic oxidation (AO), electro-Fenton (EF), and photoelectro-Fenton (PEF) using a small open and cylindrical cell with a boron-doped diamond (BDD) anode. AO has been carried out either with a stainless steel cathode or an O(2) diffusion cathode able to generate H(2)O(2). Hydroxyl radicals ((*)OH) formed at the BDD surface in all EAOPs and in the bulk from Fenton's reaction between added Fe(2+) and electrogenerated H(2)O(2) in EF and PEF are the main oxidants. All treatments yielded almost overall mineralization, although the rate for total organic carbon (TOC) removal is limited by the oxidation of persistent byproducts with (*)OH at the BDD surface. In AO, TOC abatement is enhanced by parallel electrochemical reduction of organics at the stainless steel cathode, while in PEF, it also increases from additional photolysis of intermediates by UVA light under the synergistic action of (*)OH in the bulk. The effect of current and pH on the degradative behavior of EAOPs has been examined to determine their optimum values. Atrazine decay always follows a pseudo-first-order reaction, being more rapidly destroyed from (*)OH in the bulk than at the BDD surface. Aromatic intermediates such as desethylatrazine, desethyldesisopropylatrazine, and cyanuric acid and short linear carboxylic acids such as formic, oxalic, and oxamic have been identified and quantified by reversed-phase and ion-exclusion HPLC, respectively. Released inorganic ions such as Cl(-), NO(3)(-), and NH(4)(+) have been followed by ionic chromatography. SN - 1520-5215 UR - https://www.unboundmedicine.com/medline/citation/20507135/Degradation_of_atrazine_by_electrochemical_advanced_oxidation_processes_using_a_boron_doped_diamond_anode_ L2 - https://doi.org/10.1021/jp1035647 DB - PRIME DP - Unbound Medicine ER -
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