Results 251 to 260 of about 1,005,462 (289)
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World Journal of Microbiology and Biotechnology, 2009
The removal of hexavalent chromium from aqueous solution was studied in batch experiments using dead biomass of three different species of marine Aspergillus after alkali treatment. All the cultures exhibited potential to remove Cr(VI), out of which, Aspergillus niger was found to be the most promising one.
Yasmin Khambhaty +3 more
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The removal of hexavalent chromium from aqueous solution was studied in batch experiments using dead biomass of three different species of marine Aspergillus after alkali treatment. All the cultures exhibited potential to remove Cr(VI), out of which, Aspergillus niger was found to be the most promising one.
Yasmin Khambhaty +3 more
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Dynamic studies and pseudo-second order modeling of copper(II) biosorption onto pine cone powder
Desalination, 2010Abstract The chemical interaction between biosorbent functional groups and metal ion species in solution can slightly be altered by chemical treatment of biosorbent surface. The biosorbent kinetics and mechanism for copper(II) biosorption onto pine cone powder and 0.15 mol dm − 3 NaOH treated pine cone powder were determined during batch kinetics ...
A.E. Ofomaja, E.B. Naidoo, S.J. Modise
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Pseudo-Second-Order Kinetic Equation for Describing the Effect of Sorbent and Sorbate Concentrations
LangmuirThe sorbent concentration (Cs) effect and sorbate initial concentration (C0) effect are common phenomena observed in the study of adsorption kinetics at solid-liquid interfaces. That is, adsorption rate constants simulated with classical kinetic equations, such as the pseudo-second-order (PSO) model, for a given system vary with Cs and C0.
Hongfei Wang, Lingxi Zhao, Wanguo Hou
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Pseudo-Second-Order Kinetics for the Adsorption of Uranyl Ion onto Peat at Different pH Value
Advanced Materials Research, 2010Batch tests were used to investigate the effects of pH and contact time on the adsorption capability of peat. The results indicate that adsorption of uranyl ions on peat increase with increasing pH from 1 to 5. However it takes longer contact time to reach the adsorption equilibrium with increase of pH from 1 to 5.
Zhi Rong Liu, Qin Qin Tao, Chuan Xi Wen
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Chemical Engineering Journal, 2009
Abstract A three-layer feed forward neural network was constructed and tested to analyze the second order kinetics of solid–liquid adsorption process. The pseudo second order kinetics of auramine O onto activated carbon was used to train the artificial neural network (ANN) to model the sorption system for various operating conditions.
K. Vasanth Kumar, K. Porkodi
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Abstract A three-layer feed forward neural network was constructed and tested to analyze the second order kinetics of solid–liquid adsorption process. The pseudo second order kinetics of auramine O onto activated carbon was used to train the artificial neural network (ANN) to model the sorption system for various operating conditions.
K. Vasanth Kumar, K. Porkodi
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2008 2nd International Conference on Bioinformatics and Biomedical Engineering, 2008
A comparison was made of the linear least-squares method and a nonlinear least-square method of the Langmuir isotherm and pseudo second order kinetic model for the biosorption of methylene blue onto rice husk. The parameters obtained from the linear method and the nonlinear method were different. The error analysis was performed.
Runping Han +6 more
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A comparison was made of the linear least-squares method and a nonlinear least-square method of the Langmuir isotherm and pseudo second order kinetic model for the biosorption of methylene blue onto rice husk. The parameters obtained from the linear method and the nonlinear method were different. The error analysis was performed.
Runping Han +6 more
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Sorption kinetics: Obtaining a pseudo-second order rate equation based on a mass balance approach
Journal of Environmental Chemical Engineering, 2014Abstract Various formulations of pseudo second-order rate equations have been widely used in elucidating the rate constants of a wide variety of sorption systems. In this paper, it is shown that a new formulation can be obtained by making use of the mass balance equation of a single stage batch-type system.
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Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2020
Abstract The empirical pseudo-second order rate equation has become the equation of choice to account for adsorption kinetics at solid/aqueous solution interfaces. However, its validity boundaries still remain faint. Here, they are set on the basis of the predictions of the well-established Langmuir model, cast in terms of the relevant kinetic ...
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Abstract The empirical pseudo-second order rate equation has become the equation of choice to account for adsorption kinetics at solid/aqueous solution interfaces. However, its validity boundaries still remain faint. Here, they are set on the basis of the predictions of the well-established Langmuir model, cast in terms of the relevant kinetic ...
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Process Biochemistry, 2006
Kinetic experiments were carried out for the sorption of safranin onto rice husk particles. The kinetic data were fitted to pseudo second order model of Ho, Sobkowsk and Czerwinski, Blanachard and Ritchie by linear and non-linear regression method. Non-linear method was found to be a better way of obtaining the parameters involved in the second order ...
K. Vasanth Kumar, S. Sivanesan
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Kinetic experiments were carried out for the sorption of safranin onto rice husk particles. The kinetic data were fitted to pseudo second order model of Ho, Sobkowsk and Czerwinski, Blanachard and Ritchie by linear and non-linear regression method. Non-linear method was found to be a better way of obtaining the parameters involved in the second order ...
K. Vasanth Kumar, S. Sivanesan
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Separation Science and Technology, 2017
ABSTRACTThe kinetics of adsorption in the batch mode is frequently represented by the Lagergren model or the pseudo second-order model. We assess these models in their ability to represent adsorption by comparing them with the predictions of detailed intra-particle diffusion models and also with a variety of experimental data drawn from the literature.
Chi Tien, Bandaru V. Ramarao
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ABSTRACTThe kinetics of adsorption in the batch mode is frequently represented by the Lagergren model or the pseudo second-order model. We assess these models in their ability to represent adsorption by comparing them with the predictions of detailed intra-particle diffusion models and also with a variety of experimental data drawn from the literature.
Chi Tien, Bandaru V. Ramarao
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