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Ni2+ Adsorption on Bentonite and Kaolin Surfaces | ||
| Al-Mustansiriyah Journal of Science | ||
| Article 1, Volume 21, Issue 1, 2010, Pages 62-77 | ||
| Author | ||
| Fadhela M. Hussein | ||
| Abstract | ||
| In the present work adsorption of Ni from solution on the bentonite and kaolin surfaces are studied. UV- visible spectrophotometer technique has been used to produce quantitative adsorption data at different temperatures, pH and ionic strength. The calculated data were in accordance with freundlich equation . The adsorption isotherms are of S-type according to Giles classification. The results show higher adsorption on bentonite surface than on kaolin surface. The adsorption of Ni at four different temperature ( 5,25,35,45 oC)show that the adsorption on bentonite increase with increasing ( endothermic process) but the adsorption on temperature kaolin decrease with temperature increasing ( exothermic process) also the thermodynamic functions of adsorption were calculated The adsorption of Ni ion on clays in neutrual medium was greater than that in basic and acidic medium . The adsorption of Ni ions on clays decreased with increasing NaCl concentration in the medium. | ||
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