scientific journal
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Sorbent based on glauconite forcleaning radioactively contaminated natural waters

Published in «Water: chemistry and ecology» № 4-6 / 2018 , p. 86-91.
Heading:

 

Kutergin A.S.

Summary:
It is shown the expediency of using modified sorbent for purification of natural water from radionuclides of cesium and strontium. The results of activating the surface of granular glauconite are presented. As a result, it was found that a weak alkali solution increases its strontium distribution coefficient ≈ 2 times, but does not affect the sorption of cesium. The possibility of sorption concentration of radionuclide 90Sr from aqueous solutions with a modified sorbent - iron phosphate on a granular support, under static conditions is considered. In the range of concentrations of strontium, within which the distribution of the extracted component between the solid and liquid phases obeys Henry's law (10-7 ÷ 10-3 g/l), the distribution coefficient is Kd = (1.6 ± 0.7) • 103 ml/g. The attained value of the static exchange capacity for strontium of the modified sorbent (≥ 42 mg/g) significantly exceeds the capacity of the carrier. The establishment of equilibrium in the system of the modified sorbent – solution occurs much faster than in granulated glauconite. It has been experimentally proved that modified by iron phosphate sorbent, increased the specificity to strontium at 10 time, retained the value of the distribution coefficient with respect to cesium at the level granulated glauconite. This will allow using it for complex treatment of aquatic environments. The obtained experimental data can be used in the development of new sorbents capable of providing efficient and rapid concentration of 90Sr and 137Cs in the rehabilitation of natural water sources in radioactively contaminated areas.

Keywords: glauconite, modification, purification of natural waters, sorption of radionuclides

Bibliographic link:
Kutergin A.S. Sorbent based on glauconite forcleaning radioactively contaminated natural waters // Water: chemistry and ecology. — 2018. — № 4-6. — c. 86-91. — http://watchemec.ru/en/article/28939/

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