scholarly journals Accuracy of Dubinin-Astakov and Dubinin-Raduchkevic Adsorption Isotherm Models in Evaluating Micropore Volume of Bontonite

2015 ◽  
Author(s):  
Navid Saeidi ◽  
Mehdi Parvini
Keyword(s):  
Adsorption Isotherm ◽  
Micropore Volume ◽  
Isotherm Models ◽  
Adsorption Isotherm Models

scholarly journals Biosorption potentials of acid modified Saccharum bengalense for removal of methyl violet from aqueous solutions

2017 ◽  
Vol 23 (3) ◽  
pp. 399-409 ◽  
Author(s):  
Muhammad Din ◽  
Kiran Ijaz ◽  
Khalida Naseem
Keyword(s):  
Experimental Data ◽  
Adsorption Isotherm ◽  
Aqueous Medium ◽  
Methyl Violet ◽  
Isotherm Models ◽  
Langmuir Adsorption ◽  
First Order ◽  
Adsorption Isotherm Models ◽  
Intra Particle Diffusion ◽  
Pseudo Second Order

In the present work, Saccharum bengalense (SB) was treated with sulfuric acid to enhance its efficiency. Methyl violet (MV), a cationic dye, was removed from aqueous medium using acid modified S. bengalense (A-SB). Different parameters like adsorbent dosage, stirring speed, temperature, contact time and effect of initial concentration of dye on rate of adsorption of dye from aqueous medium was studied. Experimental data obtained from adsorption of MV was analyzed by applying pseudo first order, pseudo second order and intra-particle diffusion models and it was found that the data best follows the pseudosecond order kinetics. Thermodynamic parameters indicate that adsorption reaction was spontaneous, feasible and endothermic in nature. Different adsorption isotherm models, like Langmuir, Freundlich, Dubinin-Radushkevich (D-R) and Temkin, were used to study the mechanism of adsorption process and experimental data was well fitted by the Langmuir adsorption isotherm.

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