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Synthesis and Characterization of Activated Carbons, Geopolymers, and Carbon Nanotubes from Waste-Derived Sources

2024Conference object Open access
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datacite.subject.fosCiências Agrárias::Biotecnologia Agrária e Alimentar
datacite.subject.sdg03:Saúde de Qualidade
datacite.subject.sdg02:Erradicar a Fome
dc.contributor.authorBaldo, Arthur P.
dc.contributor.authorSilva, Ana P. F.
dc.contributor.authorSilva, Adriano S.
dc.contributor.authorDíaz de Tuesta, Jose Luis
dc.contributor.authorMarin, Pricila
dc.contributor.authorPeres, José A.
dc.contributor.authorGomes, Helder
dc.date.accessioned2025-11-04T15:26:11Z
dc.date.available2025-11-04T15:26:11Z
dc.date.issued2024
dc.description.abstractCircular Economy implies strategies for waste valorization and reuse to produce higher-value products [1]. In this context, exhausted olive pomace, a waste biomass derived from olive industry was used to synthesize activated carbon (AC) through slow pyrolysis, followed by activation with CO2 to optimize the adsorbent's porosity. The pyrolysis furnace was initially maintained under an inert atmosphere with a nitrogen flow rate of 100 NmL/min, considering three different temperature stages reached through the application of a heating ramp of 5ºC/min up to 400°C and 600°C (maintained 1 hour each) and up to 800°C. Activation with CO2 occurs in the first hour at this temperature, followed by 3 hours in a nitrogen atmosphere, completing the process in 9 hours. The geopolymer (GP) was synthesized using 10 g of fly ash, a byproduct of the combustion of municipal solid waste, mixed with an alkaline solution, a mixture of 5,67g of sodium silicate and 2,27g of sodium hydroxide (10M), to initiate the geopolymerization reaction. The synthesis of carbon nanotubes (CNTs) was based on the methodology of Díaz de Tuesta et al. [2], by chemical vapor deposition with plastic waste as the precursor. The results obtained for textural characterization are presented in Table 1. AC showed the highest surface area (527 m²/g) and a pore volume of 0.318 cm³/g, can be advantageous for adsorption, while CNT functions effectively as a catalyst despite its lower surface area. Acid-base characterization showed that AC possesses high basicity (1250 μmol/g), enhancing its ability to adsorb acidic contaminants, while CNT and GP demonstrated balanced acid and basic properties, with point of zero charge (pHpzc) values of 9.86 for AC, 6.9 for CNT, and 7.6 for GP. Elemental analysis (CHNS) revealed that AC contained 63.0% C, 0.8% H, 18.0% O, and 16.4% ash. CNT, in contrast, had a higher carbon content of 92.5% and 6.0% ash.eng
dc.description.sponsorshipThis work was supported by national funds through FCT/MCTES (PIDDAC): CIMO, UIDB/00690/2020 (DOI: 10.54499/UIDB/00690/2020) and UIDP/00690/2020 (DOI: 10.54499/UIDP/00690/2020); and SusTEC, LA/P/0007/2020 (DOI: 10.54499/LA/P/0007/2020). We would also like to thank the scientific collaboration under Base-UIDB/50020/2020, CQVR (UIDB/00616/2020). The authors acknowledge the financial support provided by fundação La Caixa for the project INOVÁGUA and to Sociedade Ponto Verde through the project “Materias geopoliméricos obtidos a partir da valorização de resíduos sólidos urbanos”. Ana Paula F. da Silva and Adriano Silva supported by the doctoral Grant SFRH/BD/151346/2021 and PRT/BD/ 153090/2021 financed by the Portuguese Foundation for Science and Technology (FCT) with funds from NORTE2020, under MIT Portugal Program. Jose L. Diaz De Tuesta acknowledges financial support from the Atracción al Talento program of Comunidad de Madrid (Spain) for the individual research grants 2020-T2/AMB-19836 and 2022-T1/AMB-23946.
dc.identifier.citationBaldo, Arthur P.; Silva, Ana P. F.; Silva, Adriano S.; Díaz de Tuesta, Jose Luis; Marin, Pricila; Peres, José A.; Gomes, Helder (2024). Synthesis and Characterization of Activated Carbons, Geopolymers, and Carbon Nanotubes from Waste-Derived Sources. In Libro de resúmenes del XXVIII Encontro Internacional Galego‐Portugués de Química. Vigo. ISBN 978-84-09-66439-9
dc.identifier.isbn978-84-09-66439-9
dc.identifier.urihttp://hdl.handle.net/10198/34937
dc.language.isoeng
dc.peerreviewedyes
dc.publisherColegio Oficial de Químicos de Galicia
dc.relationMountain Research Center
dc.relationAssociate Laboratory for Sustainability and Tecnology in Mountain Regions
dc.relationLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
dc.relationChemistry Center - Vila Real
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectActivated Carbons
dc.subjectGeopolymers
dc.subjectand Carbon Nanotubes
dc.titleSynthesis and Characterization of Activated Carbons, Geopolymers, and Carbon Nanotubes from Waste-Derived Sourceseng
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleMountain Research Center
oaire.awardTitleAssociate Laboratory for Sustainability and Tecnology in Mountain Regions
oaire.awardTitleLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
oaire.awardTitleChemistry Center - Vila Real
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00690%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0007%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50020%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00616%2F2020/PT
oaire.citation.conferenceDate2024
oaire.citation.conferencePlaceVigo
oaire.citation.endPage96
oaire.citation.startPage96
oaire.citation.titleLibro de resúmenes del XXVIII Encontro Internacional Galego‐Portugués de Química
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameBaldo
person.familyNameSilva
person.familyNameSilva
person.familyNameGomes
person.givenNameArthur P.
person.givenNameAna P. F.
person.givenNameAdriano S.
person.givenNameHelder
person.identifierhttps://www.researchgate.net/profile/Ana-Ferreira-Da-Silva-3
person.identifier.ciencia-idD51C-88AB-48EE
person.identifier.ciencia-id991F-2DB8-3246
person.identifier.ciencia-id3E14-5049-B09D
person.identifier.ciencia-id6218-1E19-13EE
person.identifier.orcid0009-0000-7853-0667
person.identifier.orcid0000-0001-8979-8407
person.identifier.orcid0000-0002-6795-2335
person.identifier.orcid0000-0001-6898-2408
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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