Rozko A.M.1, FedorenkoYu.G. 2, Zharin I.S.3
1. Government organization «Institute of the Environmental Geochemistry of the National Academy of Sciences of Ukraine»
2. M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the National Academy of Science of Ukraine
3. Center for Innovative Technologies of the National Aviation University
Language: Russian
Geochemistry and ore formation 2017, 38: 101-106
https://doi.org/10.15407/gof.2017.38.101
Changing the properties of claypolimers composites to solve environmental problems.
Claypolimers composites based on bentonite and sodium acrylate obtained by free radical polymerization with a long induction period after swelling in water to a maximum value, followed by drying to constant weight, with repeated contact with water, increases the degree of free swelling by an average of 2 times. In the solution of sodium tetraborate, the degree of free swelling increases on average from 1.7 times at a solution concentration of 0,03% to 1,4 times 0,3% solution. After the first swelling cycle in water and drying, the distribution coefficient of 137Cs increases almost 30-fold. The same index in solutions of sodium tetraborate decreases by 1,3–2 times. In all cases of repeated contact between the dried samples and the radioactive solution, additional sorption (active) centres occur and, as a consequence, accumulate activity on the samples. This can be used when the made to create environmental barriers, water purification from radionuclides, dehydration and liquids etc. The salt solutions and drying the swelling effect is weak.
Keywords: clay polymeric composites, swelling, degree of free swelling, distribution coefficient, sorption.
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