Combining ZVI reduction with photo-Fenton process for the removal of persistent pollutants

An iron-based photochemical process able to act via reductive and oxidative stages by tuning experimental conditions has been explored. In a first step, zero-valent iron (ZVI), added as steel wool, was used to reduce those pollutants reluctant to oxidative processes. Then, the iron released in the s...

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Autores principales: Santos Juanes, L., García Einschlag, Fernando Sebastián, Amat, A. M., Arques, A.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Química
Iron
ZVI
Photo-Fenton
Wastewater
Combined processes
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/154715
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-154715
record_format dspace
spelling I19-R120-10915-1547152023-06-27T20:07:21Z http://sedici.unlp.edu.ar/handle/10915/154715 issn:1385-8947 Combining ZVI reduction with photo-Fenton process for the removal of persistent pollutants Santos Juanes, L. García Einschlag, Fernando Sebastián Amat, A. M. Arques, A. 2017 2023-06-27T14:43:53Z en Química Iron ZVI Photo-Fenton Wastewater Combined processes An iron-based photochemical process able to act via reductive and oxidative stages by tuning experimental conditions has been explored. In a first step, zero-valent iron (ZVI), added as steel wool, was used to reduce those pollutants reluctant to oxidative processes. Then, the iron released in the solution was employed, upon addition of hydrogen peroxide, to drive a photo-Fenton process. This procedure has been checked with a mixture of five chemicals, namely p-toluenesulfonic acid, benzoic acid, p-nitrobenzoic acid, acetaminophen and caffeic. p-Nitrobenzoic acid resulted to be the most reluctant against oxidation but it was reduced in the absence of H2O2 to form 4-aminobenzoic acid; the presence of salts (e.g. tap water) was required and best results were reached at neutral pH. As p-aminobenzoic acid can be more easily oxidized than p-nitrobenzoic, combination of both stages is meaningful: a ZVI-based reduction followed by a photo-Fenton like-oxidation was employed to remove this pollutant from tested solutions. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf 484-490
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Iron
ZVI
Photo-Fenton
Wastewater
Combined processes
spellingShingle Química
Iron
ZVI
Photo-Fenton
Wastewater
Combined processes
Santos Juanes, L.
García Einschlag, Fernando Sebastián
Amat, A. M.
Arques, A.
Combining ZVI reduction with photo-Fenton process for the removal of persistent pollutants
topic_facet Química
Iron
ZVI
Photo-Fenton
Wastewater
Combined processes
description An iron-based photochemical process able to act via reductive and oxidative stages by tuning experimental conditions has been explored. In a first step, zero-valent iron (ZVI), added as steel wool, was used to reduce those pollutants reluctant to oxidative processes. Then, the iron released in the solution was employed, upon addition of hydrogen peroxide, to drive a photo-Fenton process. This procedure has been checked with a mixture of five chemicals, namely p-toluenesulfonic acid, benzoic acid, p-nitrobenzoic acid, acetaminophen and caffeic. p-Nitrobenzoic acid resulted to be the most reluctant against oxidation but it was reduced in the absence of H2O2 to form 4-aminobenzoic acid; the presence of salts (e.g. tap water) was required and best results were reached at neutral pH. As p-aminobenzoic acid can be more easily oxidized than p-nitrobenzoic, combination of both stages is meaningful: a ZVI-based reduction followed by a photo-Fenton like-oxidation was employed to remove this pollutant from tested solutions.
format Articulo
Articulo
author Santos Juanes, L.
García Einschlag, Fernando Sebastián
Amat, A. M.
Arques, A.
author_facet Santos Juanes, L.
García Einschlag, Fernando Sebastián
Amat, A. M.
Arques, A.
author_sort Santos Juanes, L.
title Combining ZVI reduction with photo-Fenton process for the removal of persistent pollutants
title_short Combining ZVI reduction with photo-Fenton process for the removal of persistent pollutants
title_full Combining ZVI reduction with photo-Fenton process for the removal of persistent pollutants
title_fullStr Combining ZVI reduction with photo-Fenton process for the removal of persistent pollutants
title_full_unstemmed Combining ZVI reduction with photo-Fenton process for the removal of persistent pollutants
title_sort combining zvi reduction with photo-fenton process for the removal of persistent pollutants
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/154715
work_keys_str_mv AT santosjuanesl combiningzvireductionwithphotofentonprocessfortheremovalofpersistentpollutants
AT garciaeinschlagfernandosebastian combiningzvireductionwithphotofentonprocessfortheremovalofpersistentpollutants
AT amatam combiningzvireductionwithphotofentonprocessfortheremovalofpersistentpollutants
AT arquesa combiningzvireductionwithphotofentonprocessfortheremovalofpersistentpollutants
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