Abstract
The sorption of Fe(III) cations by a suspension of La2(SO4)3 with a content up to 200 g/dm3 was studied. It is shown that with an increase in the pH of the solution, the amount of ferric cations associated with the suspension of lanthanum sulfate increases. A sharp increase in the absorption of Fe(III) is observed in the pH range from 1.5 to 5.5 By potentiometric titration, the presence of mixed complexes between the suspension of La2(SO4)3 and mainly Fe(OH)2+ is shown. Due to the formation of such complexes, the dispersed phase of ferric cations is extracted from the solution. With an increase in the amount of lanthanum sulfate suspension in an aqueous medium, the extraction of ferric cation increases to the degree of 1.5.
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