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Optimization of process conditions to improve copper adsorption capacity of raw and treated Algerian bentonite: Characterization, kinetics and equilibrium study

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Title Optimization of process conditions to improve copper adsorption capacity of raw and treated Algerian bentonite: Characterization, kinetics and equilibrium study
 
Creator Bouaziz, Mohamed Ghrissi
Youcef, Leila
Kheliel, Oussama
Benalia, Mohamed Charif
 
Subject Treated bentonite
Characterization
Copper
Adsorption
Kinetic
Equilibrium
 
Description 249-261
Raw bentonite (RB) locally available in Mostaganem (Algeria) deposit has been treated in the presence of NaOH
(B-NaOH), MgCl2 (B-MgCl2) and H2SO4 (B-H2SO4) to improve its adsorption ability for the removal of copper ions from
aqueous solutions. Characterization of all adsorbents supported montmorillonite, illite and kaolinite as major clay minerals
identified for the raw and treated bentonites and proved the aluminosilicate structure of the clays. In synthetic solutions, the
adsorption equilibrium of copper onto RB, B-MgCl2 and B-H2SO4 is reached in 30 min. while, equilibrium is reached after 4
hours when using B-NaOH. The adsorption kinetics are well described by the pseudo-second-order model. The adsorption
of copper is pH-dependent. The Langmuir, Freundlich and Dubinin-Radushkevich isotherms indicate a suitable fit between
the experimental data and models. The corresponding parameters indicate that the sorption mechanism might be physical in
nature. The maximum adsorption capacities of Langmuir that are obtained are in the following order 25.1 mg/g (RB)
 
Date 2021-08-05T06:45:58Z
2021-08-05T06:45:58Z
2021-05
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscair.res.in/handle/123456789/57846
 
Publisher NIScPR-CSIR, India
 
Source IJCT Vol.28(3) [May 2021]