Estimate of the possibility of using sorbents based on aluminosilicates for the remediation of soil contaminated with strontium radionuclides

Abstract

The sorption capacity for strontium of natural (clinoptilolite and glauconite) and modified aluminosilicates by mixed ferrocyanide nickel-potassium was studied. It was shown that clinoptilolite-based samples have a higher specificity for strontium. The distribution coefficient of strontium by natural clinoptilolite and mixed nickel-potassium ferrocyanide based on clinoptilolite were respectively 10(3,8±0,4) Ee Cyrillic sign 10(3,1±0,4) ml/g. Static exchange capacity for strontium modified samples based on glauconite and clinoptilolite: 148 Ee Cyrillic sign 137 mg/g. The process of sorption of strontium proceeds in the pore-diffusion mode. The calculated diffusion coefficients for all samples were 10-13 m2/s.