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Comparing atrazine and cyanuric acid electro-oxidation on mixed oxide and boron-doped diamond electrodes.
Environ Technol. 2013 Mar-Apr; 34(5-8):1043-51.ET

Abstract

The breakdown of pesticides has been promoted by many methods for clean up of contaminated soil and wastewaters. The main goal is to decrease the toxicity of the parent compound to achieve non-toxic compounds or even, when complete mineralization occurs, carbon dioxide and water. Therefore, electrochemical degradation (potentiostatic and galvanostatic) of both the pesticide atrazine and cyanuric acid (CA) at boron-doped diamond (BDD) and Ti/Ru0.3Ti0.7O2 dimensionally stable anode (DSA) electrodes, in different supporting electrolytes (NaCl and Na2SO4), is presented with the aim of establishing the influence of the operational parameters on the process efficiency. The results demonstrate that both the electrode material and the supporting electrolyte have a strong influence on the rate of atrazine removal. In the chloride medium, the rate of atrazine removal is always greater than in sulfate under all conditions employed. Furthermore, in the sulfate medium, atrazine degradation was significant only at the BDD electrode. The total organic carbon (TOC) load decreased by 79% and 56% at the BDD and DSA electrodes, respectively, in the chloride medium. This trend was maintained in the sulfate medium but the TOC removal was lower (i.e. 33% and 13% at BDD and DSA electrodes, respectively). CA, a stable atrazine degradation intermediate, was also studied and it is efficiently removed using the BDD electrode in both media, mainly when high current densities are employed. The use of the BDD electrode in the chloride medium not only degrades atrazine but also mineralized cyanuric acid leading to the higher TOC removal.

Authors+Show Affiliations

Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, Brazil.No affiliation info availableNo affiliation info availableNo 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

23837356

Citation

Malpass, Geoffroy R P., et al. "Comparing Atrazine and Cyanuric Acid Electro-oxidation On Mixed Oxide and Boron-doped Diamond Electrodes." Environmental Technology, vol. 34, no. 5-8, 2013, pp. 1043-51.
Malpass GR, Salazar-Banda GR, Miwa DW, et al. Comparing atrazine and cyanuric acid electro-oxidation on mixed oxide and boron-doped diamond electrodes. Environ Technol. 2013;34(5-8):1043-51.
Malpass, G. R., Salazar-Banda, G. R., Miwa, D. W., Machado, S. A., & Motheo, A. J. (2013). Comparing atrazine and cyanuric acid electro-oxidation on mixed oxide and boron-doped diamond electrodes. Environmental Technology, 34(5-8), 1043-51.
Malpass GR, et al. Comparing Atrazine and Cyanuric Acid Electro-oxidation On Mixed Oxide and Boron-doped Diamond Electrodes. Environ Technol. 2013 Mar-Apr;34(5-8):1043-51. PubMed PMID: 23837356.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparing atrazine and cyanuric acid electro-oxidation on mixed oxide and boron-doped diamond electrodes. AU - Malpass,Geoffroy R P, AU - Salazar-Banda,Giancarlo R, AU - Miwa,Douglas W, AU - Machado,Sérgio A S, AU - Motheo,Artur J, PY - 2013/7/11/entrez PY - 2013/7/11/pubmed PY - 2013/8/2/medline SP - 1043 EP - 51 JF - Environmental technology JO - Environ Technol VL - 34 IS - 5-8 N2 - The breakdown of pesticides has been promoted by many methods for clean up of contaminated soil and wastewaters. The main goal is to decrease the toxicity of the parent compound to achieve non-toxic compounds or even, when complete mineralization occurs, carbon dioxide and water. Therefore, electrochemical degradation (potentiostatic and galvanostatic) of both the pesticide atrazine and cyanuric acid (CA) at boron-doped diamond (BDD) and Ti/Ru0.3Ti0.7O2 dimensionally stable anode (DSA) electrodes, in different supporting electrolytes (NaCl and Na2SO4), is presented with the aim of establishing the influence of the operational parameters on the process efficiency. The results demonstrate that both the electrode material and the supporting electrolyte have a strong influence on the rate of atrazine removal. In the chloride medium, the rate of atrazine removal is always greater than in sulfate under all conditions employed. Furthermore, in the sulfate medium, atrazine degradation was significant only at the BDD electrode. The total organic carbon (TOC) load decreased by 79% and 56% at the BDD and DSA electrodes, respectively, in the chloride medium. This trend was maintained in the sulfate medium but the TOC removal was lower (i.e. 33% and 13% at BDD and DSA electrodes, respectively). CA, a stable atrazine degradation intermediate, was also studied and it is efficiently removed using the BDD electrode in both media, mainly when high current densities are employed. The use of the BDD electrode in the chloride medium not only degrades atrazine but also mineralized cyanuric acid leading to the higher TOC removal. SN - 0959-3330 UR - https://www.unboundmedicine.com/medline/citation/23837356/Comparing_atrazine_and_cyanuric_acid_electro_oxidation_on_mixed_oxide_and_boron_doped_diamond_electrodes_ L2 - https://www.tandfonline.com/doi/full/10.1080/09593330.2012.733420 DB - PRIME DP - Unbound Medicine ER -