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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Fenton-type process using peracetic acid: Efficiency, reaction elucidations and ecotoxicity

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Author(s):
Carlos, Thayrine Dias [1] ; Bezerra, Leydiane Barbosa [2] ; Vieira, Mayane Marques [2] ; Sarmento, Renato Almeida [3] ; Pereira, Douglas Henrique [1, 2] ; Cavallini, Grasiele Soares [1, 2]
Total Authors: 6
Affiliation:
[1] Univ Fed Tocantins, Programa Posgrad Quim, BR-77402970 Gurupi, Tocantins - Brazil
[2] Univ Fed Tocantins, Curso Quim Ambiental, BR-77402970 Gurupi, Tocantins - Brazil
[3] Univ Fed Tocantins, Programa Posgrad Prod Vegetal, BR-77402970 Gurupi, Tocantins - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF HAZARDOUS MATERIALS; v. 403, FEB 5 2021.
Web of Science Citations: 6
Abstract

Recent studies on Fenton-type processes involving peracetic acid (PAA) stimulated further development of advanced oxidative processes (AOPs). The objective of this work was to provide new information about such processes, elucidate their reaction mechanisms both experimentally and theoretically, and verify their possible uses. The Fenton-type reaction of PAA with Fe3+ exhibited a greater dye degradation efficiency than the Fenton process, while the efficiency of the PAA reaction with Fe2+ was very close of Fenton process. Moreover, the processes photocatalyzed by solar radiation demonstrated comparable efficiencies due to the photoreduction of Fe3+ to Fe2+. By conducting theoretical calculations, it was found that the formation of oxidizing radicals during the reaction of PAA with Fe2+ was not thermodynamically favorable and, therefore, unsuitable for practical use. In contrast, the processes occurred in the PAA/Fe3+ system included thermodynamically spontaneous reactions that generated peroxyl (CH3C(O)OO center dot), alkoxyl (CH3C(O)center dot), and hydroperoxyl (HO2 center dot) radicals. The ecotoxicological tests demonstrated that the toxicity of the PAA to the organism Dugesia tigrina can be attributed to the presence of H2O2. (AU)

FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
Grantee:Munir Salomao Skaf
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 17/11485-6 - Computational and theoretical developments based on ab initio methods and the Density Functional Theory
Grantee:Rogério Custodio
Support Opportunities: Regular Research Grants