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Removal of Sr-90 from highly Na+-rich liquid nuclear waste with a layered vanadosilicate
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Number of Authors: 102019 (English)In: Energy & Environmental Science, ISSN 1754-5692, E-ISSN 1754-5706, Vol. 12, no 6, p. 1857-1865Article in journal (Refereed) Published
Abstract [en]

Capture of trace amounts (parts per trillion or ppt level) of Sr-90 from highly Na+-rich (5 M or 115 000 parts per million) liquid wastes produced from reprocessing of spent nuclear fuel rods is crucial for continuous operation of nuclear power plants. However, no sorbents have shown such abilities. We now report that a novel layered vanadosilicate, SGU-7, with the unit cell parameters of a = 23.58 A, b = 30.04 A, c = 12.31 A, b = 100.28, and space group of P12(1)/a1, can effectively capture Sr-90 from a 5 M Na+ solution containing 6.2 ppt of Sr-90. It also effectively captures 1-ppb level Ra-226 from 2 M NaCl solution, and Cs+ and Sr2+ from groundwater, demonstrating that it can be immediately used to remedy groundwater and soil contaminated with Ra-226, Sr-90, and Cs-137.

Place, publisher, year, edition, pages
2019. Vol. 12, no 6, p. 1857-1865
National Category
Chemical Sciences Environmental Engineering
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URN: urn:nbn:se:su:diva-171144DOI: 10.1039/c8ee03302aISI: 000471283100008OAI: oai:DiVA.org:su-171144DiVA, id: diva2:1342349
Available from: 2019-08-13 Created: 2019-08-13 Last updated: 2019-08-13Bibliographically approved

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Mayoral, AlvaroKim, HyuncheolTerasaki, Osamu
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Department of Materials and Environmental Chemistry (MMK)
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