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The electro-oxidation of tetracycline hydrochloride in commercial DSA® modified by electrodeposited platinum.

Authors
  • Santos, João Paulo Tenório da Silva1
  • Tonholo, Josealdo1
  • de Andrade, Adalgisa Rodrigues2
  • Del Colle, Vinicius3
  • Zanta, Carmem Lucia de Paiva E Silva4
  • 1 Chemistry and Biotechnology Institute of Federal University of Alagoas, Av. Lourival Melo Mota, s/n, Campus A.C. Simões, Tabuleiro do Martins, Maceió, AL, 57072-970, Brazil. , (Brazil)
  • 2 Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14040-901, Brazil. , (Brazil)
  • 3 Federal University of Alagoas, Av. Manoel Severino Barbosa - Bom Sucesso, Arapiraca, AL, 57309-005, Brazil. , (Brazil)
  • 4 Chemistry and Biotechnology Institute of Federal University of Alagoas, Av. Lourival Melo Mota, s/n, Campus A.C. Simões, Tabuleiro do Martins, Maceió, AL, 57072-970, Brazil. [email protected] , (Brazil)
Type
Published Article
Journal
Environmental Science and Pollution Research
Publisher
Springer-Verlag
Publication Date
May 01, 2021
Volume
28
Issue
19
Pages
23595–23609
Identifiers
DOI: 10.1007/s11356-020-09919-2
PMID: 32661961
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Tetracycline hydrochloride (TCH) electro-oxidation by commercial DSA® and commercial DSA® modified by platinum electrodeposition was evaluated. The electrodeposition was carried out at constant potential (E = - 0.73 V vs RHE) in different times (1200, 2400, and 4800 s). Scanning electron microscopy (SEM) images show that Pt electrodeposits have elongated shape particle forming a uniform surface, and energy dispersive spectroscopy (EDS) data confirms the presence of Pt on the surface. The electrochemical characterization by cyclic voltammetry showed an increase of the electrochemically active area (EAA) in function of the Pt electrodeposition time. The electro-oxidation of the TCH 0.45 mmol L-1 in H2SO4 0.1 mol L-1 solution was evaluated according to the applied current densities (j = 25, 50, 100 mA cm-2). Both the amount of platinum deposited and j showed a slight improvement in the efficiency of TCH removal, reaching 97.2% of TCH removal to DSA®/Pt4800 and 100 mA cm-2. The TCH mineralization (TOC removal), the percentage of mineralization current efficiency (MCE%), and energy consumption were 15.8%, 0.2649%, and 7.4138 kWh (g TOC)-1, respectively. The DSA®/Pt electrodes showed higher stability to TCH electro-oxidation, indicating to be a promising material for the electro-oxidation of organic pollutants.

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