Publicação
Novel porous fly ash-containing geopolymers for pH buffering applications
| Resumo: | In this work novel, porous biomass fly ash-containing geopolymers with high pH buffer capacity and tailored alkalis leaching were produced by using hydrogen peroxide as blowing agent. Results demonstrate that the geopolymers leaching rate can be controlled by the hydrogen peroxide content and by the solids-to-liquid ratio during geopolymers preparation. Total leaching of hydroxyl ions from the porous geopolymers ranged between 0.0104 and 0.0180 mol/(dm(3) g). Higher solids-to-liquid ratios promoted a gentler alkalis leaching from the geopolymers, while higher porosities shifted the initial pH towards higher values without compromising their buffering ability. The excellent ability to control pH over time shown by these novel geopolymers demonstrates their potential as pH regulators in applications where high buffer capacity is required. Furthermore the reuse of biomass fly ash in these innovative materials reduces the environmental footprint associated with this waste disposal. (C) 2016 Elsevier Ltd. All rights reserved. |
|---|---|
| Autores principais: | Novais, Rui M. |
| Outros Autores: | Buruberri, L. H.; Seabra, M. P.; Bajare, D.; Labrincha, J. A. |
| Assunto: | LOW THERMAL-CONDUCTIVITY RED MUD METAKAOLIN ACTIVATION POROSITY RATIOS TILES WATER |
| Ano: | 2016 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade de Aveiro |
| Idioma: | inglês |
| Origem: | RIA - Repositório Institucional da Universidade de Aveiro |
| _version_ | 1866172756031176704 |
|---|---|
| author | Novais, Rui M. |
| author2 | Buruberri, L. H. Seabra, M. P. Bajare, D. Labrincha, J. A. |
| author2_role | author author author author |
| author_facet | Novais, Rui M. Buruberri, L. H. Seabra, M. P. Bajare, D. Labrincha, J. A. |
| author_role | author |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Novais, Rui M.\"},{\"Person.name\":\"Buruberri, L. H.\"},{\"Person.name\":\"Seabra, M. P.\"},{\"Person.name\":\"Bajare, D.\"},{\"Person.name\":\"Labrincha, J. A.\"}] |
| datacite.creators.creator.creatorName.fl_str_mv | Novais, Rui M. Buruberri, L. H. Seabra, M. P. Bajare, D. Labrincha, J. A. |
| datacite.date.Accepted.fl_str_mv | 2016-01-01T00:00:00Z |
| datacite.date.embargoed.fl_str_mv | 10000-01-01T00:00:00Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| datacite.subjects.subject.fl_str_mv | LOW THERMAL-CONDUCTIVITY RED MUD METAKAOLIN ACTIVATION POROSITY RATIOS TILES WATER |
| datacite.titles.title.fl_str_mv | Novel porous fly ash-containing geopolymers for pH buffering applications |
| dc.creator.none.fl_str_mv | Novais, Rui M. Buruberri, L. H. Seabra, M. P. Bajare, D. Labrincha, J. A. |
| dc.date.Accepted.fl_str_mv | 2016-01-01T00:00:00Z |
| dc.date.embargoed.fl_str_mv | 10000-01-01T00:00:00Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10773/19677 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | ELSEVIER SCI LTD |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| dc.subject.none.fl_str_mv | LOW THERMAL-CONDUCTIVITY RED MUD METAKAOLIN ACTIVATION POROSITY RATIOS TILES WATER |
| dc.title.fl_str_mv | Novel porous fly ash-containing geopolymers for pH buffering applications |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | In this work novel, porous biomass fly ash-containing geopolymers with high pH buffer capacity and tailored alkalis leaching were produced by using hydrogen peroxide as blowing agent. Results demonstrate that the geopolymers leaching rate can be controlled by the hydrogen peroxide content and by the solids-to-liquid ratio during geopolymers preparation. Total leaching of hydroxyl ions from the porous geopolymers ranged between 0.0104 and 0.0180 mol/(dm(3) g). Higher solids-to-liquid ratios promoted a gentler alkalis leaching from the geopolymers, while higher porosities shifted the initial pH towards higher values without compromising their buffering ability. The excellent ability to control pH over time shown by these novel geopolymers demonstrates their potential as pH regulators in applications where high buffer capacity is required. Furthermore the reuse of biomass fly ash in these innovative materials reduces the environmental footprint associated with this waste disposal. (C) 2016 Elsevier Ltd. All rights reserved. |
| dirty | 0 |
| eu_rights_str_mv | restrictedAccess |
| format | article |
| id | ria_b39fdeb3fcc526560939680c1908f9b0 |
| identifier.url.fl_str_mv | http://hdl.handle.net/10773/19677 |
| instacron_str | ua |
| institution | Universidade de Aveiro |
| instname_str | Universidade de Aveiro |
| language | eng |
| network_acronym_str | ria |
| network_name_str | RIA - Repositório Institucional da Universidade de Aveiro |
| oai_identifier_str | oai:ria.ua.pt:10773/19677 |
| organization_str_mv | urn:organizationAcronym:ua |
| person_str_mv | Novais, Rui M. Buruberri, L. H. Seabra, M. P. Bajare, D. Labrincha, J. A. |
| publishDate | 2016 |
| publisher.none.fl_str_mv | ELSEVIER SCI LTD |
| reponame_str | RIA - Repositório Institucional da Universidade de Aveiro |
| repository_id_str | urn:repositoryAcronym:ria |
| service_str_mv | urn:repositoryAcronym:ria |
| spelling | porIn this work novel, porous biomass fly ash-containing geopolymers with high pH buffer capacity and tailored alkalis leaching were produced by using hydrogen peroxide as blowing agent. Results demonstrate that the geopolymers leaching rate can be controlled by the hydrogen peroxide content and by the solids-to-liquid ratio during geopolymers preparation. Total leaching of hydroxyl ions from the porous geopolymers ranged between 0.0104 and 0.0180 mol/(dm(3) g). Higher solids-to-liquid ratios promoted a gentler alkalis leaching from the geopolymers, while higher porosities shifted the initial pH towards higher values without compromising their buffering ability. The excellent ability to control pH over time shown by these novel geopolymers demonstrates their potential as pH regulators in applications where high buffer capacity is required. Furthermore the reuse of biomass fly ash in these innovative materials reduces the environmental footprint associated with this waste disposal. (C) 2016 Elsevier Ltd. All rights reserved.application/pdfengELSEVIER SCI LTDporNovel porous fly ash-containing geopolymers for pH buffering applicationsNovais, Rui M.Buruberri, L. H.Seabra, M. P.Bajare, D.Labrincha, J. A.Handlehttp://hdl.handle.net/10773/19677ISSNIsPartOf0959-6526DOIIsPartOf10.1016/j.jclepro.2016.02.11410000-01-01T00:00:00Z2016-01-01T00:00:00Z2016http://purl.org/coar/access_right/c_16ecrestricted accessporLOW THERMAL-CONDUCTIVITYporRED MUDporMETAKAOLINporACTIVATIONporPOROSITYporRATIOSporTILESporWATER3543181 byteshttp://purl.org/coar/access_right/c_16ecapplication/pdffulltexthttps://ria.ua.pt/bitstream/10773/19677/2/Novel%20porous%20fly%20ash-containing%20geopolymers%20for%20pH%20buffering%20applications_10.1016j.jclepro.2016.02.114.pdfliteraturehttp://purl.org/coar/resource_type/c_6501journal article |
| spellingShingle | Novel porous fly ash-containing geopolymers for pH buffering applications Novais, Rui M. LOW THERMAL-CONDUCTIVITY RED MUD METAKAOLIN ACTIVATION POROSITY RATIOS TILES WATER |
| status | SINGLETON |
| subject.fl_str_mv | LOW THERMAL-CONDUCTIVITY RED MUD METAKAOLIN ACTIVATION POROSITY RATIOS TILES WATER |
| title | Novel porous fly ash-containing geopolymers for pH buffering applications |
| title_full | Novel porous fly ash-containing geopolymers for pH buffering applications |
| title_fullStr | Novel porous fly ash-containing geopolymers for pH buffering applications |
| title_full_unstemmed | Novel porous fly ash-containing geopolymers for pH buffering applications |
| title_short | Novel porous fly ash-containing geopolymers for pH buffering applications |
| title_sort | Novel porous fly ash-containing geopolymers for pH buffering applications |
| topic | LOW THERMAL-CONDUCTIVITY RED MUD METAKAOLIN ACTIVATION POROSITY RATIOS TILES WATER |
| topic_facet | LOW THERMAL-CONDUCTIVITY RED MUD METAKAOLIN ACTIVATION POROSITY RATIOS TILES WATER |
| url | http://hdl.handle.net/10773/19677 |
| visible | 1 |