Selective adsorption of lithium ions from Urmia Lake onto aluminum hydroxide

Selective adsorption of lithium ions from Urmia Lake onto aluminum hydroxide In the present study, recovery of lithium as lithium aluminate from Urmia Lake was investigated. A coprecipitation method was utilized by using an aluminum salt $$ \left( {{\text{AlCl}}_{3} .6{\text{H}}_{2} {\text{O}}} \right) $$ AlCl 3 . 6 H 2 O . Lithium ions are adsorbed on aluminum hydroxide, which is prepared by adding NaOH and $$ {\text{AlCl}}_{3} .6{\text{H}}_{2} {\text{O}} $$ AlCl 3 . 6 H 2 O to the brines at $$ {\raise0.7ex\hbox{${{\text{Al}}^{3 + } }$} \!\mathord{\left/ {\vphantom {{{\text{Al}}^{3 + } } {{\text{Li}}^{ + } }}}\right.\kern-0pt} \!\lower0.7ex\hbox{${{\text{Li}}^{ + } }$}} $$ Al 3 + Li + molar ratio ≈5. The results showed that the maximum $$ {\text{Li}}^{ + } $$ Li + ion adsorption was adsorbed at pH ~ 7. Also, by increasing the temperature from 30 °C to 40 °C, lithium ions adsorption was decreased. The maximum adsorption amount of $$ {\text{Al}}\left( {\text{OH}} \right)3 $$ Al OH 3 was at 30 °C, pH = 7 and density 1.31. The obtained results from adsorption of $$ {\text{Li}}^{ + } $$ Li + of Urmia Lake were compared with four isotherm models, Langmuir, Dubinin–Radushkevich, Freundlich and Temkin isotherms. In addition, sulfuric acid was used for $$ {\text{Li}}^{ + } $$ Li + desorption from aluminum hydroxide. Environmental Earth Sciences Springer Journals

Selective adsorption of lithium ions from Urmia Lake onto aluminum hydroxide

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Springer Berlin Heidelberg
Copyright © 2017 by Springer-Verlag GmbH Germany
Earth Sciences; Geology; Hydrology/Water Resources; Geochemistry; Environmental Science and Engineering; Terrestrial Pollution; Biogeosciences
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