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Electrochemical degradation of PNP at boron-doped diamond and platinum electrodes.
J Hazard Mater. 2013 Jan 15; 244-245:295-302.JH

Abstract

The electrochemical degradation of p-nitrophenol (PNP) at boron-doped diamond (BDD) and platinum (Pt) anodes was studied by varying the parameters such as Cl(-) concentration, pH of aqueous medium and applied current density. The results obtained were explained in terms of in situ concomitant generation of hydroxyl radicals and chloride based oxidant species. The degradation of PNP was highly promoted in low concentration of NaCl electrolyte (less than 0.10 M), on contrary, the mineralization efficiency was poor at both BDD and Pt anodes with the NaCl concentration up to 0.20 M, which was ascribed to the formation of refractory chlorinated organic compounds. A maximum of 100% and 70% of COD removal was achieved in 5h of electrolysis period using both BDD and Pt anodes under similar experimental conditions. Kinetic study indicated that the degradation of PNP at BDD and Pt anodes followed pseudo-first-order reactions, and the reaction rate constant (k(s)) of the former was observed to be higher than that of the latter. Besides COD, conversion of PNP into various intermediate compounds and their degradations were also monitored. The mechanisms for PNP degradation at BDD and Pt anodes were proposed separately by considering the nature of respective intermediate species and their concentrations.

Authors+Show Affiliations

Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan 430074, PR China. yanrong_zhang@mail.hust.edu.cnNo 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

23270953

Citation

Zhang, Yanrong, et al. "Electrochemical Degradation of PNP at Boron-doped Diamond and Platinum Electrodes." Journal of Hazardous Materials, vol. 244-245, 2013, pp. 295-302.
Zhang Y, Yang N, Murugananthan M, et al. Electrochemical degradation of PNP at boron-doped diamond and platinum electrodes. J Hazard Mater. 2013;244-245:295-302.
Zhang, Y., Yang, N., Murugananthan, M., & Yoshihara, S. (2013). Electrochemical degradation of PNP at boron-doped diamond and platinum electrodes. Journal of Hazardous Materials, 244-245, 295-302. https://doi.org/10.1016/j.jhazmat.2012.11.038
Zhang Y, et al. Electrochemical Degradation of PNP at Boron-doped Diamond and Platinum Electrodes. J Hazard Mater. 2013 Jan 15;244-245:295-302. PubMed PMID: 23270953.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrochemical degradation of PNP at boron-doped diamond and platinum electrodes. AU - Zhang,Yanrong, AU - Yang,Nan, AU - Murugananthan,Muthu, AU - Yoshihara,Sachio, Y1 - 2012/11/29/ PY - 2012/09/20/received PY - 2012/11/02/revised PY - 2012/11/17/accepted PY - 2012/12/29/entrez PY - 2012/12/29/pubmed PY - 2013/7/3/medline SP - 295 EP - 302 JF - Journal of hazardous materials JO - J. Hazard. Mater. VL - 244-245 N2 - The electrochemical degradation of p-nitrophenol (PNP) at boron-doped diamond (BDD) and platinum (Pt) anodes was studied by varying the parameters such as Cl(-) concentration, pH of aqueous medium and applied current density. The results obtained were explained in terms of in situ concomitant generation of hydroxyl radicals and chloride based oxidant species. The degradation of PNP was highly promoted in low concentration of NaCl electrolyte (less than 0.10 M), on contrary, the mineralization efficiency was poor at both BDD and Pt anodes with the NaCl concentration up to 0.20 M, which was ascribed to the formation of refractory chlorinated organic compounds. A maximum of 100% and 70% of COD removal was achieved in 5h of electrolysis period using both BDD and Pt anodes under similar experimental conditions. Kinetic study indicated that the degradation of PNP at BDD and Pt anodes followed pseudo-first-order reactions, and the reaction rate constant (k(s)) of the former was observed to be higher than that of the latter. Besides COD, conversion of PNP into various intermediate compounds and their degradations were also monitored. The mechanisms for PNP degradation at BDD and Pt anodes were proposed separately by considering the nature of respective intermediate species and their concentrations. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/23270953/Electrochemical_degradation_of_PNP_at_boron_doped_diamond_and_platinum_electrodes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(12)01140-5 DB - PRIME DP - Unbound Medicine ER -