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6697303 
Journal Article 
STUDY OF LI+ ADSORPTION ONTO POLYMERIC ALUMINUM(III) HYDROXIDE FOR APPLICATION IN THE TREATMENT OF GEOTHERMAL WATERS 
Pauwels, H; Brach, M; Fouillac, C; , 
1995 
Yes 
Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN: 0927-7757 
ELSEVIER SCIENCE BV 
AMSTERDAM 
73-82 
WOS:A1995RM74100004 
Li+ adsorption onto aluminium hydroxide has been investigated at various temperatures. Experiments were made on two high-salinity geothermal-type fluids in which the lithium concentration reaches values greater than 30 and 50 mmol(-1) respectively, in order to study the recovery of lithium from the fluids. Aluminium hydroxide was produced by adding AlCl3 . 6H(2)O salt and KOH solution to the two reconstituted fluids. Experiments were performed at various pH values, temperatures (20, 50 and 80 degrees C) and Al contents. The results indicate high Li+ adsorption rates for both fluids at 80 degrees C, even under conditions where small amounts of Al salt were added to the fluids. Under certain conditions, the chemical composition of the geothermal fluids had an influence on the Li+ adsorption rate. The presence of certain ions in solution, such as berate, which prevent Li+ adsorption, is therefore discussed. Experiments on the desorption of lithium from aluminium hydroxide using dilute solutions of hydrofluoric and sulphuric acid gave good results for the hydrofluoric acid.