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dc.contributor.authorFaria, Julianapor
dc.contributor.authorRocha, Anapor
dc.contributor.authorDuarte, Maria Salomépor
dc.contributor.authorBraga, Cátia S. N.por
dc.contributor.authorFonseca, Antóniopor
dc.contributor.authorNeves, Isabel C.por
dc.contributor.authorAlves, M. M.por
dc.identifier.citationFaria, Juliana; Rocha, Ana; Duarte, Maria Salomé; Braga, Cátia S. N.; Fonseca, António; Neves, Isabel C.; Alves, M. Madalena, Effect of zeolite nanomaterials in methanogenic communities. XXVII Encontro Nacional da Sociedade Portuguesa de Química. No. P27, Braga, Portugal, July 14-16 julho, 232, 2021.por
dc.description.abstractRecently, the application of zeolite structures in methanogenic communities has attracted significant attention, since they may enhance the anaerobic digestion process, by affecting specifically the methanogenic activity of the sludges1. Zeolites are solid inorganic crystalline materials comprised of silicon, aluminum and oxygen in the three-dimensional structure. The building blocks become arranged in a periodic way to form channels and cages on a nano- and subnanometer scale of strictly regular dimensions, named micropores. The presence of the aluminum in the zeolite framework create a negative charge in the lattice, which can be balanced by the exchangeable cations, as sodium or metal ions.2 In this study, commercial zeolite structures (ZSM5, USY, NaX and NaY) with different particle sizes and different exchangeable cations (Co, Cu, Zn, Fe) were used in order to investigate their effect towards the specific methanogenic activity, both acetoclastic and hydrogenotrophic, of anaerobic sludge. In the acetoclastic methanogenic activity, NaY modified with Cobalt (CoY) decreased the activity in comparison with the control (without zeolite). The remaining zeolites (ZSM5, USY, NaX and NaY), even when modified with metal ions (Zn, Fe, Cu), seems to have no effect on this methanogenic pathway. On the other hand, the hydrogenotrophic methanogenesis was improved by the presence of NaY (109 %), which did not happen in the presence of ZSM5 and USY zeolites. Additionally, the effect of different zeolite concentration was accessed. Overall, the increase of zeolite concentration from 1 g/L to 5 g/L resulted in a higher inhibition towards the methanogenic activity. In addition, the application of these nanomaterials can be evaluated in pure cultures of methanogens, in order to understand and fine-tune the best zeolite nanomaterial concentration that may improve the specific methanogenic activity.por
dc.description.sponsorshipWe thank the Fundação para a Ciência e Tecnologia (FCT) for financial support through Centre of Chemistry (UID/QUI/00686/2013 and UID/QUI/0686/2016) and BioTecNorte (operation NORTE-01-0145-FEDER-000004), and through Centre of Biological -engineering (UIDB/04469/2020 unit). Cátia S. N. Braga holds a grant SFRH/BD/132003/2017 funded by FCT and European Union (EU), through the Portuguese State Budget and the European Social Fund under the scope of Programa Operacional Regional do Norte.por
dc.titleEffect of zeolite nanomaterials in methanogenic communitiespor
oaire.citationConferencePlaceBraga, Portugalpor
dc.subject.fosCiências Naturais::Ciências Biológicaspor
sdum.conferencePublicationXXVII Encontro Nacional da Sociedade Portuguesa de Químicapor
Appears in Collections:CEB - Resumos em Livros de Atas / Abstracts in Proceedings

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