Bentonite
Mostrando 1-12 de 129 artigos, teses e dissertações.
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1. Manufacturing and characterization of sustainable macroporous glass foams
Abstract This work produced glass foams from soda-lime glass bottles, bentonite, and alumina by the replica method. Compositions with different contents of bentonite (5, 10, 15, and 20 wt%) were prepared and heat-treated at 800 °C. In the alumina-added compositions, 50 wt% of the bentonite was replaced by the alumina. The influences of the content of benton
Cerâmica. Publicado em: 2022
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2. The influence of separately and combined bentonite and kaolinite as binders for pelletization of NaA zeolite from coal fly ash
Abstract Pelletization of zeolitic materials is required to facilitate their practical industrial and commercial applications. Zeolite-NaA was synthesized from fly ash by the fusion method and shaped into spherical granules. Bentonite, kaolinite, and a combination of bentonite with kaolinite were tested as binders with different contents from 5 to 10 wt%. Th
Cerâmica. Publicado em: 2022
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3. DIFERENCIAÇÃO CATIÔNICA DE BENTONITAS POR INFRAVERMELHO: UM ESTUDO DOS EFEITOS DA HIDRATAÇÃO DOS CÁTIONS TROCÁVEIS
In the bentonite industry, the most common procedure for quality control of the ore and the sodium activation process is the swelling method. However, this tool is restricted only to the differentiation of the sodium and non-sodium types, not considering the other cationic varieties. The objective of this study was to establish parameters for cationic differ
Quím. Nova. Publicado em: 2021-03
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4. Effect on Merlot red wine of fining agents mixture: application of the simplex centroid design
Abstract In the elaboration of young red wine, it is necessary to obtain a clear product with stable color. The clarity and stability can be obtained using fining agents. The objective of this study was to evaluate the combined effect of fining with pea protein isolate (PPI), bentonite, and polyvinylpyrrolidone (PVPP) on a red wine, using the experimental de
Food Sci. Technol. Publicado em: 2020-09
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5. Effect on Merlot red wine of fining agents mixture: application of the simplex centroid design
Abstract In the elaboration of young red wine, it is necessary to obtain a clear product with stable color. The clarity and stability can be obtained using fining agents. The objective of this study was to evaluate the combined effect of fining with pea protein isolate (PPI), bentonite, and polyvinylpyrrolidone (PVPP) on a red wine, using the experimental de
Food Sci. Technol. Publicado em: 17/01/2020
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6. Bionanocomposites of PLA/PBAT/organophilic clay: preparation and characterization
Abstract The objective of this study was to develop bionanocomposites from blends of poly(lactic acid) (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) and from 3% and 6% bentonite clay. Initially, the bentonite clay was treated with Praepagen salt, and the properties of the modified clay were evaluated. After the organophilization of the clay was co
Polímeros. Publicado em: 04/11/2019
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7. Influence of reactivity and mineralogical composition on instability due to the disintegration of shales from Paraíba and Ceará States, Brazil
Resumo Este trabalho teve como objetivo correlacionar a reatividade e composição mineralógica de folhelhos à sua desintegração. Para tanto, foram caracterizadas cinco amostras de folhelho das Bacias do Rio do Peixe e Araripe, localizadas nos estados brasileiros da Paraíba e Ceará e, para fins de comparação, foi utilizada uma amostra de argila bento
Cerâmica. Publicado em: 15/08/2019
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8. Simulation of tailings release in dam break scenarios using physical models
Abstract This article presents an experimental study performed to evaluate the volume of material released from the reservoir during a tailings dam failure event using models. To verify the influence of the parameters related to the breach geometry and the undrained shear strength (Su) in a failure event, 20 scenarios were simulated considering the absence o
REM, Int. Eng. J.. Publicado em: 19/06/2019
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9. Influence of Ca2+ in the rheological properties and filtration of bentonitic clay dispersions in aqueous drilling fluids
Resumo As características físico-químicas dos cátions podem ser capazes de modificar as propriedades reológicas das argilas bentoníticas, como suas cargas, tamanhos dos cátions trocáveis adsorvidos nos argilominerais, comportamentos de hidratação e diferentes intercalações com as camadas estruturais da bentonita, sendo um fator importante conside
Cerâmica. Publicado em: 06/06/2019
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10. Minerais séricos, características morfométricas ósseas e deposição de minerais ósseos de frangos de corte alimentados com dieta com inclusão de bentonita
RESUMO O objetivo deste trabalho foi avaliar a concentração sérica de cálcio, cloretos, ferro, fósforo e magnésio, as características morfométricas ósseas e a deposição de cálcio e fósforo nas tíbias de frangos de corte recebendo dieta com zero, 0,25 ou 0,50% de bentonita. Um ensaio foi conduzido com 288 frangos de corte de 14 a 21 dias de idad
Arq. Bras. Med. Vet. Zootec.. Publicado em: 06/06/2019
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11. Factorial design applied to sodium activation of a Brazilian bentonite
Resumo Bentonitas sódicas são muito utilizadas na indústria por possuírem propriedades específicas desejáveis para diferentes finalidades, como inchamento, tixotropia, e capacidade de troca catiônica elevados. Por outro lado, bentonitas cálcicas e policatiônicas, predominantes no Brasil, necessitam de beneficiamento químico através da ativação s
Cerâmica. Publicado em: 06/06/2019
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12. Mechanical and bioactivity assessment of wollastonite/PVA composite synthesized from bentonite clay
Resumo Os compósitos de vidro/polímero podem imitar a estrutura natural do osso possuindo uma configuração fibra-matriz que proporciona propriedades físicas e biológicas apropriadas. As cerâmicas de wollastonita são conhecidas por suas bioatividade e biocompatibilidade promissoras quando aplicadas na regeneração óssea. O álcool polivinílico (PVA
Cerâmica. Publicado em: 06/06/2019