Lithium adsorption on amorphous aluminum hydroxides and gibbsite

Authors : Konstantinos P Prodromou

Pages : 13-16

Doi:10.18393/ejss.2016.1.013-016

View : 49 | Download : 12

Publication Date : 2016-01-02

Article Type : Research Paper

Abstract :Lithium insert ignore into journalissuearticles values(Li); adsorption on both amorphous aluminum hydroxides and gibbsite was studied. For the amorphous Alinsert ignore into journalissuearticles values(OH); 3 the adsorption was found to be pH dependent. Generally, 1.6 times more Li was adsorbed at initial pH value 8.0 compared with pH value 6.50. Gibbsite adsorbed 11.6 to 45.5 times less Li quantities compared with amorphous Alinsert ignore into journalissuearticles values(OH); 3 . Lithium adsorption was not depended on equilibrium times. It remained stable for all equilibrium times used. Lithium quantities extracted with 1N CH 3 COONH 4  pH 7 , represent the physical adsorption, while the remaining Li that was adsorbed on Alinsert ignore into journalissuearticles values(OH); 3 , represents the chemical adsorption. During the desorption process 19% of Li extracted with NH 4 + , represents the physical adsorption, while the remaining 81% of Li, which was adsorbed represents the chemical adsorption. In gibbsite, 9.6% of Li represents the physical adsorption and 90.4% the chemical one. The experimental data conformed well to Freundlich isotherm equation.
Keywords : Adsorption, aluminum hydroxides, desorption, lithium

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