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	Provedor de dados Anais da ABC (AABC) (1) Scientia Agricola (1) Autor Lima,Sidarta A. (1) Machado,Wesley (1) Melo,Thadeu Rodrigues de (1) Moyne,Christian (1) Murad,Marcio A. (1) Stemmelen,Didier (1) Tavares Filho,João (1) Mais... Palavra-chave Electrical double layer (2) Aggregation (1) Colloids (1) Electro-osmosis (1) Flocculation (1) Homogenization (1) Kaolinite (1) Nernst-Planck (1) Poisson-Boltzmann (1) Zeta potential (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2020 (1) 2010 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Charge sparsity: An index to quantify cation effects on clay dispersion in soils Scientia Agricola Melo,Thadeu Rodrigues de; Machado,Wesley; Tavares Filho,João. ABSTRACT: Few approaches have been developed to measure the isolated effect of exchangeable cations on clay dispersion in soils. In this study, the charge sparsity (CS) index was proposed using the ratio between the cations hydrated ionic radius and valence. The index capacity to measure cation effects on clay dispersion in soils was also evaluated. Three Ferralsols, sampled at different sites in Paraná State, Brazil, were homoionized with Ca2+, Mg2+, K+, or Na+ prior to evaluation of the clay dispersion degree. Published independent data for two soils and clays were also used. We tested the capacity of CS and II, the latter proposed by Marchuck and Rengasamy (2011), to predict clay dispersion in soils. The CS predicted the dispersion degree more... Tipo: Info:eu-repo/semantics/article Palavras-chave: Colloids; Electrical double layer; Aggregation; Flocculation; Zeta potential. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000101400 Electro-osmosis in kaolinite with pH-dependent surface charge modelling by homogenization Anais da ABC (AABC) Lima,Sidarta A.; Murad,Marcio A.; Moyne,Christian; Stemmelen,Didier. A new three-scale model to describe the coupling between pH-dependent flows and transient ion transport, including adsorption phenomena in kaolinite clays, is proposed. The kaolinite is characterized by three separate nano/micro and macroscopic length scales. The pore (micro)-scale is characterized by micro-pores saturated by an aqueous solution containing four monovalent ions and charged solid particles surrounded by thin electrical double layers. The movement of the ions is governed by the Nernst-Planck equations, and the influence of the double layers upon the flow is dictated by the Helmholtz-Smoluchowski slip boundary condition on the tangential velocity. In addition, an adsorption interface condition for the Na+ transportis postulated to capture its... Tipo: Info:eu-repo/semantics/article Palavras-chave: Electrical double layer; Electro-osmosis; Homogenization; Kaolinite; Nernst-Planck; Poisson-Boltzmann. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000100016 Registros recuperados: 2 Primeira ... 1 ... Última

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