Screening of heterogeneous catalysts for the activated persulfate oxidation of sulfamethoxazole in aqueous matrices. Does the matrix affect the selection of catalyst?

Ribeiro, Rui; Frontistis, Zacharias; Mantzavinos, Dionissios; Silva, Adrián; Faria, Joaquim; Gomes, Helder

Publication

Screening of heterogeneous catalysts for the activated persulfate oxidation of sulfamethoxazole in aqueous matrices. Does the matrix affect the selection of catalyst?

2019Journal article

dc.contributor.author	Ribeiro, Rui
dc.contributor.author	Frontistis, Zacharias
dc.contributor.author	Mantzavinos, Dionissios
dc.contributor.author	Silva, Adrián
dc.contributor.author	Faria, Joaquim
dc.contributor.author	Gomes, Helder
dc.date.accessioned	2019-09-03T10:30:41Z
dc.date.available	2019-09-03T10:30:41Z
dc.date.issued	2019
dc.description.abstract	The contribution of persulfate oxidation to water treatment technologies based on advanced oxidationprocesses is nowadays widely accepted. However, the importance of the water matrix on the removal of micropollu-tants has been neglected during early screening of heterogeneous catalysts, which can hinder further developmentsin the field.RESULTS: Three magnetic graphitic nanocomposites (MGNCs), obtained by carbon encapsulation of magnetite (Fe3O4), nickelferrite (NiFe2O4) and cobalt ferrite (CoFe2O4), were prepared and employed as heterogeneous catalysts in the activation ofpersulfate for the degradation of antibiotic sulfamethoxazole (SMX). The importance of the water matrix and its constituentson the performance of the MGNC materials was assessed. It was found that their relative performance in terms of oxidationof SMX in pure water decreases in the order: NiFe2O4/MGNC>Fe3O4/MGNC>CoFe2O4/MGNC. However, the order changed(Fe3O4/MGNC>NiFe2O4/MGNC>CoFe2O4/MGNC) when drinking water or secondary treated wastewater were employed. Theindividual effects of the water matrix constituents, such as bicarbonate, chloride, pH, and humic acid, or the use of addedradicalscavengers,onthecatalystperformancewereinvestigated,whiletheheterogeneousnatureoftheprocesswasconfirmedthrough leaching tests.CONCLUSION: A realistic water matrix should be considered throughout all the steps involved in the evaluation of newheterogeneous catalysts for the activated persulfate oxidation of SMX. Otherwise, misleading conclusions may be drawn,limiting potential improvements of this treatment technology.© 2019 Society of Chemical Industry	pt_PT
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	Ribeiro, Rui; Frontistis, Zacharias; Mantzavinos, Dionissios; Silva, Adrián; Faria, Joaquim; Gomes, Helder (2019). Screening of heterogeneous catalysts for the activated persulfate oxidation of sulfamethoxazole in aqueous matrices. Does the matrix affect the selection of catalyst? Journal of Chemical Technology and Biotechnology. ISSN 1097-4660. 94:8, p. 2425-2432	pt_PT
dc.identifier.doi	10.1002/jctb.6080	pt_PT
dc.identifier.issn	1097-4660
dc.identifier.uri	http://hdl.handle.net/10198/19527
dc.language.iso	eng	pt_PT
dc.peerreviewed	yes	pt_PT
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	pt_PT
dc.subject	Catalytic activity	pt_PT
dc.subject	Contaminants of emerging concern	pt_PT
dc.subject	Magnetic graphitic nanocomposites	pt_PT
dc.subject	Water quality	pt_PT
dc.title	Screening of heterogeneous catalysts for the activated persulfate oxidation of sulfamethoxazole in aqueous matrices. Does the matrix affect the selection of catalyst?	pt_PT
dc.type	journal article
dspace.entity.type	Publication
oaire.citation.endPage	2432	pt_PT
oaire.citation.startPage	2425	pt_PT
oaire.citation.title	Journal of Chemical Technology and Biotechnology	pt_PT
oaire.citation.volume	94	pt_PT
person.familyName	Gomes
person.givenName	Helder
person.identifier.ciencia-id	6218-1E19-13EE
person.identifier.orcid	0000-0001-6898-2408
rcaap.rights	restrictedAccess	pt_PT
rcaap.type	article	pt_PT
relation.isAuthorOfPublication	0eb96337-224a-4339-9918-334436fbbb99
relation.isAuthorOfPublication.latestForDiscovery	0eb96337-224a-4339-9918-334436fbbb99