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Screening of activated carbons for the treatment of highly concentrated phenol solutions using catalytic wet peroxide oxidation: the effect of iron impurities on the catalytic activity

2020Journal article Open access
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dc.contributor.authorPinho, Maria
dc.contributor.authorRibeiro, Rui
dc.contributor.authorGomes, Helder
dc.contributor.authorFaria, Joaquim
dc.contributor.authorSilva, Adrián
dc.date.accessioned2020-12-03T09:48:56Z
dc.date.available2020-12-03T09:48:56Z
dc.date.issued2020
dc.description.abstractActivated carbons (ACs) have been used as metal supports for catalytic wet peroxide oxidation (CWPO) of organic compounds. A shortcoming is that added metals can undergo leaching, leading to catalyst deactivation and secondary contamination of the treated water. In the present study, CWPO of phenol aqueous solutions was investigated in the presence of five commercial ACs without added metals yet containing di erent extents of iron impurities resulting from their industrial preparation procedures (ROX 0.8, RX 3-Extra, C-Gran and PK 0.25-1 from Cabot Norit and HYDRAFFIN AS 12/450 from Degussa). Application of as-received ROX 0.8 leads to the best compromise between removals of phenol (79%) and total organic carbon (TOC; 50%) and iron leaching (0.22 mg L􀀀1). In-house-modified ROX 0.8 materials, obtained by thermal treatment under inert atmosphere followed by activation under oxidative atmosphere, were also tested. The activity of ROX 0.8 oxidized at 673 K (ROXN673) was the highest among these materials (92% and 57% of phenol and TOC removals, respectively) and with iron leaching (0.67 mg L􀀀1) well below the limits established by European regulations for discharge of treated waters. This enhanced performance was mainly explained by the more developed porous structure and higher specific surface area (SBET) of ROXN673, thus promoting better accessibility to iron impurities, which act as active sites for CWPO at the surface of the catalyst.pt_PT
dc.description.sponsorshipThis work was financially supported by project NORTE-01-0145-FEDER-031049 InSpeCt—PTDC/EAM-AMB/31049/2017 funded by FEDER funds through NORTE 2020—Programa Operacional Regional do NORTE and by national funds (PIDDAC) through FCT/MCTES.We would also like to thank the scientific collaboration under Base Fundings—UIDP/50020/2020 of the Associate Laboratory LSRE-LCM and UIDB/00690/2020 of the Centro de Investigação de Montanha (CIMO)—funded by national funds through FCT/MCTES (PIDDAC).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPinho, Maria T.; Ribeiro, Rui S.; Gomes, Helder T.; Faria, Joaquim L.; Silva, Adrián (2020). Screening of activated carbons for the treatment of highly concentrated phenol solutions using catalytic wet peroxide oxidation: the effect of iron impurities on the catalytic activity. Catalysts. ISSN 2073-4344. 10:11, p. 1-14pt_PT
dc.identifier.doi10.3390/catal10111318pt_PT
dc.identifier.issn2073-4344
dc.identifier.urihttp://hdl.handle.net/10198/22917
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.subjectAdvanced oxidation processes (AOPs)pt_PT
dc.subjectCWPOpt_PT
dc.subjectHeterogeneous Fenton processpt_PT
dc.subjectCarbon materialspt_PT
dc.subjectCatalytic activitypt_PT
dc.subjectWastewater treatmentpt_PT
dc.subjectPhenolpt_PT
dc.subjectEnvironmental protectionpt_PT
dc.subjectWaterpt_PT
dc.titleScreening of activated carbons for the treatment of highly concentrated phenol solutions using catalytic wet peroxide oxidation: the effect of iron impurities on the catalytic activitypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue11pt_PT
oaire.citation.startPage1318pt_PT
oaire.citation.titleCatalystspt_PT
oaire.citation.volume10pt_PT
person.familyNameGomes
person.givenNameHelder
person.identifier.ciencia-id6218-1E19-13EE
person.identifier.orcid0000-0001-6898-2408
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication0eb96337-224a-4339-9918-334436fbbb99
relation.isAuthorOfPublication.latestForDiscovery0eb96337-224a-4339-9918-334436fbbb99

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