Returning land contaminated as a result of radiation accidents to farming use / Voronina A.V., Blinova M.O., Semenishchev V.S., Gupta D.K. // Journal of Environmental Radioactivity. - 2015. - V. 144, l. . - P. 103-112.

ISSN:
0265931X
Type:
Article
Abstract:
An assessment is given of the possibility of sorbents based on natural aluminosilicates (glauconite and clinoptilolite) being used for remediation of radioactively contaminated land with the aim of returning it to farming use. A comparative study of selectivity and reversibility of radiocaesium and radiostrontium sorption by natural aluminosilicates as well as by modified ferrocyanide sorbents based on these aluminosilicates was made. It was found that surface modification of aluminosilicates by ferrocyanides increases the selectivity of synthesized sorbents to caesium by 100-1000 times, increases sorption capacity and makes caesium sorption almost irreversible, whereas, selectivity of these sorbents to strontium radionuclides remains approximately the same as for natural aluminosilicates. The caesium distribution coefficient for mixed nickel-potassium ferrocyanide on glauconite is 10(5.0±0.6)Lkg-1, the static exchange capacity (SEC) is 63mgg-1; for mixed nickel-potassium ferrocyanide based on clinoptilolite caesium distribution coefficients in various concentration ranges are 10(7.0±1.0), 10(5.7±0.4) and 10(3.2±0.7)Lkg-1, total SEC was 500mgg-1. Caesium leaching by various leaching solutions from saturated mixed nickel-potassium ferrocyanide based on clinoptilolite was lower than 2%; from saturated mixed nickel-potassium ferrocyanide based on glauconite it was 1.5-14.6%. Ferrocyanide sorbents, based on glauconite and clinoptilolite are recommended for remediation of land, contaminated by caesium as a result of the Fukushima accident in Japan. Use of these sorbents should decrease the transfer of caesium to agricultural vegetation up to a factor of 20. © 2015 Elsevier Ltd.
Author keywords:
Caesium and strontium; Radiation accident; Radioactively contaminated lands; Radionuclides in vegetation; Remediation; Sorbents
Index keywords:
Accidents; Aluminosilicates; Contamination; Cyanides; Leaching; Mica; Nickel; Nuclear reactor accidents; Pollution; Potassium; Radioisotopes; Remediation; Sorbents; Sorption; Strontium; Vegetation; Ze
DOI:
10.1016/j.jenvrad.2015.03.012
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Affiliations Ural Federal University, Physical Technology Institute, Radiochemistry and Applied Ecology Chair, Mira str., 19, Ekaterinburg, Russian Federation; Gottfried Wilhelm Leibniz Universität Hannover, Institut für Radioökologie und Strahlenschutz (IRS), Herrenhäuser Street 2, Gebäude 4113, Hannover, Germany
Author Keywords Caesium and strontium; Radiation accident; Radioactively contaminated lands; Radionuclides in vegetation; Remediation; Sorbents
Chemicals/CAS aluminum silicate, 12183-80-1, 1302-93-8, 1318-74-7, 1335-30-4, 61027-90-5; cesium, 7440-46-2; clinoptilolite, 12173-10-3, 12271-42-0, 67240-23-7; ferrocyanide, 13408-63-4, 13601-19-9; nickel, 7440-02-0; potassium, 7440-09-7; strontium, 7440-24-6; Cesium Radioisotopes; clinoptilolite; Ferrocyanides; glauconite; Minerals; Soil Pollutants, Radioactive; Strontium Radioisotopes; Zeolites
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Correspondence Address Voronina, A.V.; Ural Federal University, Physical Technology Institute, Radiochemistry and Applied Ecology Chair, Mira str., 19, Russian Federation
Publisher Elsevier Ltd
CODEN JERAE
PubMed ID 25827577
Language of Original Document English
Abbreviated Source Title J. Environ. Radioact.
Source Scopus