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Assessment of gamma radiation effects on antioxidant activity of cork wastewater

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dc.contributor.authorMadureira, Joana
dc.contributor.authorPimenta, Andreia I.
dc.contributor.authorDias, Maria Inês
dc.contributor.authorMelo, Rita
dc.contributor.authorSantos, Pedro M.P.
dc.contributor.authorFalcão, António N.
dc.contributor.authorCabo Verde, Sandra
dc.contributor.authorFerreira, Isabel C.F.R.
dc.contributor.authorMargaça, Fernanda M.A.
dc.date.accessioned2017-01-18T10:49:57Z
dc.date.available2017-01-18T10:49:57Z
dc.date.issued2015
dc.description.abstractCork cooking wastewater results from the process of boiling cork planks. It is an aqueous and complex dark liquor with high concentration of phenolic compounds such as phenolic acids and tannins [1, 2], which are known for their high antioxidant activity. The aim of this work is to perform a compreensive assessment of the effects of gamma radiation on the antioxidant activity of cork cooking water. The irradiation experiments were carried out at room temperature in a Co-60 experimental equipment (Prescisa 22, Graviner, Lda, UK), with an activity of 140 Tbq (3.77 kCi) and at a dose rate of 1.5 kGy/h, located at the Centro de Ciências e Tecnologias Nucleares (Portugal). Samples of wastewater were irradiated at. three distinct. doses (10, 20 and 50 KGy) and the antioxidant activity was evaluated by in vitro assays based on different mechanisms of action: DPPH radical scavenging activity, reducing power and inhibition of β-carotene bleaching. Antioxidant capacity was compared with the physico-chemical characterization [3) of cork wastewater - Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), Total Suspended Solids (TSS) and Total Phenolic Content. (TP) - when exposed to gamma radiation. The obtained results point out that gamma radiation induces changes in complex compounds leading to an increase in the antioxidant capacity. These results demonstrate the potential of this technology in order to increase the added value of cork wastewaters.pt_PT
dc.description.sponsorshipWe are grateful to FCT (Portugal) by the supporting of RECI/AAG-TEC/0400/2012 "Application of lonizing Radiation for a Sustainable Environment" project and to lnternational Atomic Energy Agency (Austria) by the supporting of CRP 1539 - F23029 "Radiation Treatment of Wastewater for Reuse with Particular Focus on Wastewaters Containing Organic Pollutants"' project.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMadureira, Joana; Pimenta, Andreia I.; Dias, Maria Inês; Melo, Rita; Santos, Pedro M.P.; Falcão, António N.; Cabo Verde, Sandra; Ferreira, Isabel C.F.R.; Margaça, Fernanda M.A. (2015). Assessment of gamma radiation effects on antioxidant activity of cork wastewater. In 2nd EUCheMS Congresso n Green and Sustainable Chemistry. Lisboapt_PT
dc.identifier.urihttp://hdl.handle.net/10198/13860
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationApplication of Ionizing Radiation for a Sustainable Environment
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleAssessment of gamma radiation effects on antioxidant activity of cork wastewaterpt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleApplication of Ionizing Radiation for a Sustainable Environment
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/RECI%2FAAG-TEC%2F0400%2F2012/PT
oaire.citation.title2nd EUCheMS Congresso on Green and Sustainable Chemistrypt_PT
oaire.fundingStream3599-PPCDT
person.familyNameDias
person.familyNameFerreira
person.givenNameMaria Inês
person.givenNameIsabel C.F.R.
person.identifier144781
person.identifier.ciencia-id2A13-4BE6-C7CF
person.identifier.ciencia-id9418-CF95-9919
person.identifier.orcid0000-0001-8744-7814
person.identifier.orcid0000-0003-4910-4882
person.identifier.ridM-8242-2013
person.identifier.ridE-8500-2013
person.identifier.scopus-author-id54388787000
person.identifier.scopus-author-id36868826600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication7ca8432b-e7f4-4116-a56e-9eba0d4403bd
relation.isAuthorOfPublicationbd0d1537-2e03-41fb-b27a-140af9c35db8
relation.isAuthorOfPublication.latestForDiscoverybd0d1537-2e03-41fb-b27a-140af9c35db8
relation.isProjectOfPublication7a4904dd-decb-473e-8df3-4901a9ab4d08
relation.isProjectOfPublication.latestForDiscovery7a4904dd-decb-473e-8df3-4901a9ab4d08

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