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<strong>Adsorption of Co(II) on nanobentonite surface:Kinetic and equilibrium studies</strong>

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Title Statement <strong>Adsorption of Co(II) on nanobentonite surface:Kinetic and equilibrium studies</strong>
 
Added Entry - Uncontrolled Name batouti, mervette abdel moneim; Professor Faculty of Science AlexandriaUniversity
Alexandria University-Faculty of Science
 
Uncontrolled Index Term Nano bentonite; Cobalt; Wastewater; Thermodynamic parameter; Kinetic parameter; Adsorption models
 
Summary, etc. The ability of selected adsorbents such as nano bentonite to remove Co (II) ions from wastewater at different conditions as contact time, amount of adsorbent, temperature, initial concentration, and <em>p</em>H has been studied and reported. In order to find out thermodynamic and kinetic parameters, equilibrium adsorption models have been applied. Although experimental datais confirmed with both Langmuir and Freundlich isotherm models. Adsorption rate constant has been determined from Lagergren Equation and pseudo-second order  Equations.<br /> Freundlich model has a better correlation coefficient (R<sup>2</sup>) than the Langmuir model for the studied concentrations at 25°C also Tempkin isotherm is applied. Another important result withdrawn from the values of thermodynamic parameters can be stated as, negative value of ΔG° and positive value of the ΔS° show that the adsorption of Co(II) ions onto both adsorbents is a spontaneous process and positive value of ΔH° indicates that the adsorption is endothermic in nature. Finally, it can be seen that the pseudo-second order equation provide the best correlation coefficient (R<sup>2</sup>) for the adsorption data.
 
Publication, Distribution, Etc. Indian Journal of Chemical Technology (IJCT)
2018-07-05 10:41:26
 
Electronic Location and Access application/pdf
http://op.niscair.res.in/index.php/IJCT/article/view/10452
 
Data Source Entry Indian Journal of Chemical Technology (IJCT); ##issue.vol## 24, ##issue.no## 5 (2017): Indian Journal of Chemical Technology
 
Language Note en
 
Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCT/article/download/10452/29329
http://op.niscair.res.in/index.php/IJCT/article/download/10452/29330