Experimental study on cesium immobilization in struvite structures

Copyright © 2015 Elsevier B.V. All rights reserved..

Ceramicrete, a chemically bonded phosphate ceramic, was developed for nuclear waste immobilization and nuclear radiation shielding. Ceramicrete products are fabricated by an acid-base reaction between magnesium oxide and mono potassium phosphate that has a struvite-K mineral structure. In this study, we demonstrate that this crystalline structure is ideal for incorporating radioactive Cs into a Ceramicrete matrix. This is accomplished by partially replacing K by Cs in the struvite-K structure, thus forming struvite-(K, Cs) mineral. X-ray diffraction and thermo-gravimetric analyses are used to confirm such a replacement. The resulting product is non-leachable and stable at high temperatures, and hence it is an ideal matrix for immobilizing Cs found in high-activity nuclear waste streams. The product can also be used for immobilizing secondary waste streams generated during glass vitrification of spent fuel, or the method described in this article can be used as a pretreatment method during glass vitrification of high level radioactive waste streams. Furthermore, it suggests a method of producing safe commercial radioactive Cs sources.

Medienart:

E-Artikel

Erscheinungsjahr:

2016

Erschienen:

2016

Enthalten in:

Zur Gesamtaufnahme - volume:302

Enthalten in:

Journal of hazardous materials - 302(2016) vom: 25. Jan., Seite 241-249

Sprache:

Englisch

Beteiligte Personen:

Wagh, Arun S [VerfasserIn]
Sayenko, S Y [VerfasserIn]
Shkuropatenko, V A [VerfasserIn]
Tarasov, R V [VerfasserIn]
Dykiy, M P [VerfasserIn]
Svitlychniy, Y O [VerfasserIn]
Virych, V D [VerfasserIn]
Ulybkina, Е А [VerfasserIn]

Links:

Volltext

Themen:

Ceramicrete
Cesium immobilization
Chemically bonded phosphate ceramic
Journal Article
Struvite
Vitrification

Anmerkungen:

Date Completed 04.03.2016

Date Revised 15.08.2017

published: Print-Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.1016/j.jhazmat.2015.09.049

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM253773318