Аннотация
The conditions of adsorption of Cr3 + ions at the surface of diatomite are optimized. It was shown that the adsorption of Cr3 + ions on diatomite depending on the initial concentration is 1,8-6,9 mg /g, which is caused by the occurrence of the ion exchange reaction between the silanol groups of diatomite and Cr (III) ions. The effect of pH on the binding of Cr3 + ions with diatomite was studied. It was established that acidification of the medium leads to a decrease in the degree of extraction of Cr3 + ions from solutions, due to protonation of SiOH-groups of the diatomite surface with H + ions of acids to SiOH2+. It is suggested that, along with the adsorption of Cr3 + ions on the surface of diatomite heterocoagulation of diatomite particles and hydroxocomplexes of Cr3 + ions is possible.