Sorption of Ce(III) by clay minerals
Анотація
The sorption of cerium(III) has been studied by layered silicates: montmorillonite (with a broadening structural cell) and kaolinite (with a hard structural cell and high perfect structure). An effect has been examined on this process of humic substances as deposited on minerals and that of soluble technogenic complexing reagents, EDТА being taken as example. Sorption of Ce(III) has been shown to by to determined a great extent the structure of mineral, рН value of solution, and concentration of complexing ligand. For the sample of mineral with deposited humic substances in the presence of ions of highly-charged element - cerium, desorption of humic acids is observed from the surface of mineral with formation of soluble complexes of HA-Сe(III), which is a more favorable process energetically, than formation of complexes [of mineral surface -HA-Сe(III)].
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