Anionic Clays
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Avaliação do uso de argilas montmorilonitas modificadas na adsorção de nitrato em meio aquoso
RESUMO Este estudo investigou a eficiência da remoção de nitrato em meio aquoso usando adsorção em argilas montmorilonitas comerciais, comparativamente a uma resina aniônica comumente usada nessa operação. Algumas dessas argilas foram intercaladas como o íon hexadeciltrimetilamônio para avaliação. Áreas superficiais específicas, capacidades de
Eng. Sanit. Ambient.. Publicado em: 21/03/2019
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2. MOLECULAR VALIDATED MODEL FOR ADSORPTION OF PROTONATED DYE ON LDH
Abstract Hydrotalcite-like compounds are anionic clays of scientific and technological interest for their use as ion exchange materials, catalysts and modified electrodes. Surface phenomenon are important for all these applications. Although conventional analytical methods have enabled progress in understanding the behavior of anionic clays in solution, an e
Braz. J. Chem. Eng.. Publicado em: 2016-03
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3. ESTUDO DA ADSORÇÃO DE PIRENO EM SOLOS BRASILEIROS / PYRENE ADSORPTION IN BRAZILIAN SOILS STUDY
Since most of the studies that involve polycyclic aromatic hydrocarbons (PAH) adsorption in soils are make in regions of temperate or cold climate. In tropical countries, the characteristics of the pedological processes and the resultant soils are quite different there is the necessity of working on new studies in the Brazilian soils. In this dissertation, t
Publicado em: 2008
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4. Estudo da adsorção de água em compostos tipo-brucita por cálculos ab initio
The anionic clays, also known as layered double hydroxides (LDH) or hydrotalcitelike compounds, constitute a family of materials whose chemical formula can be represented by: [M2+ (1x) Me3+ x(OH)2]x+ . Amx/ m .nH2O. These compounds have hydroxide planes, or layers, which become permanently positively charged by the substitution of divalent cations M2+ by tri
Publicado em: 2008
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5. Ecomateriais: desenvolvimento e aplicação de materiais porosos funcionais para proteção ambiental
Fundamental aspects of the conception and applications of ecomaterials, in particular porous materials in the perspective of green chemistry are discussed in this paper. General recommendations for description and classification of porous materials are reviewed briefly. By way of illustration, some case studies of materials design and applications in polluti
Química Nova. Publicado em: 2007-04
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6. Intercalação de fármacos com atividade antiinflamatória (ácido mefenâmico e piroxicam) em hidróxido duplo lamelar / Intercalation of drugs with antiinflammatory activity (mefenamic acid and piroxicam) in layered double hydroxide
A intercalação de espécies de interesse biológico e terapêutico em Hidróxidos Duplos Lamelares (HDLs) vem se mostrando uma estratégia interessante para a obtenção de sistemas de armazenamento ou carregadores de drogas. No presente trabalho foram investigadas rotas sintéticas e parâmetros experimentais para a intercalação dos ânions derivados do
Publicado em: 2007
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7. Study of aplication of Layered Double Hydroxides in removal and slow release of pesticides / Estudo da aplicação de hidróxidos duplos lamelares na remoção e liberação lenta de pesticidas
The extensive use of pesticides in modern agriculture has been contributing to an increase in environmental contamination. Layered Double Hydroxides (LDHs), or anionic clays, bear a layered structure, and a variety of anions can be intercalated between these layers through electrostatic interactions. These layered materials can be used in adsorption/sorption
Publicado em: 2006
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8. Intercalation compounds of hydrotalcite-like anionic clays with anti-inflammatory agents, II: Uptake of diclofenac for a controlled release formulation
The purpose of this study was to investigate whether hydrotalcite is able to intercalate diclofenac, a nonsteroidal anti-inflammatory drug, and release it in a controlled manner. Layered Mg−Al hydrotalcite in the chloride form was used as a host, and the intercalation compound was prepared by Cl−/diclofenac anionic exchange. Drug release from the interca
Springer-Verlag.