Aluminosilicophosphate geoceramics as matrices for the immobilization of partitioned 90Sr and 137Cs wastes

Bogdanov, R.V.; Kuznetsov, R. A.

doi:10.1134/s1066362206020202

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Radionuclide 90 Sr, one of the main nuclear wastes, has gained a wide attention due to its long half‐life period (28 years) and high beta radiant energy (0.546 MeV) . In recent years, many efforts have been made to immobilize 90 Sr using various encapsulation matrix such as cementitious materials, glass, ceramics, crystalline zirconium phosphate, and nanoparticle additives . However, a robust way to storage Sr with high immobilization performance, stable chemical stability, and economy benefits is still lacking.…”

Section: Introductionmentioning

confidence: 99%

Immobilization behavior of Sr in geopolymer and its ceramic product

Lou

Jia

et al. 2019

J Am Ceram Soc

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To date, geopolymer has emerged as a promising and inexpensive precursor with potential application in trapping hazardous elements via physical encapsulation or chemical bonding. In this work, different high‐temperature products derived from Sr‐contained geopolymer precursors were prepared. Different to conventional hazardous elements that immobilized in the geopolymer precursor, which show decreasing leaching rates after high‐temperature treatments, leaching rates of Sr in the resulting high‐temperature products first increase and then decrease with the increasing heating temperature. Herein, we first shed light on the underlying reasons of such temperature‐dependent leaching behaviors by investigating effects of heating temperature on the phase composition, microstructure, and immobilization mechanism. Moreover, a novel immobilization strategy has been proposed based on the blocking effect of formed nepheline structures at 1200°C. Using this strategy, the leaching rate of Sr reduced to 5.82 × 10−7g cm−2 d−1 in the deionized water.

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Section: Introductionmentioning

confidence: 99%

Immobilization behavior of Sr in geopolymer and its ceramic product

Lou

Jia

et al. 2019

J Am Ceram Soc

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“…Bogdamov and Kuznetsov reported alumino silicophosphate ceramics as matrices for the immobilization of 90 Sr and 137 Cs [32]. Hashimoto and Nayakama studied the immobilization of caesium and strontium in NASICON structure phosphate of the formula, HZr 2 (PO 4 ) 3 [30].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of apatite phosphates containing Cs+, Sr2+ and RE3+ ions and chemical durability studies

Kumar

Buvaneswari

2013

Materials Research Bulletin

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“…In the last decade, researchers have actively designed mineral-like matrix materials, which are analogs of stable natural minerals capable of incorporating radionuclides. In Russia, various matrices, such as the compositions with structures of kosnarite (NZP) NaZr 2 (PO 4 ) 3 [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Polyfunctional microspherical materials for long-term disposal of liquid radioactive wastes

et al. 2008

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The possibility of immobilizing liquid radioactive wastes into polyfunctional microspherical materials of the block and powdered types is demonstrated. These materials are intended for reprocessing radioactive wastes of different compositions and make it possible to perform a multistage process of conditioning radioactive wastes under relatively mild conditions (at temperatures below 1000 ° C) with the conversion of water-soluble cesium and strontium compounds into water-insoluble mineral forms in the course of solid-phase transformations. Owing to the aluminosilicate composition of microspherical components of energy ashes (cenospheres), the cenospheres can serve as precursors of aluminosilicate granitoid minerals. Different techniques are proposed and conditions are experimentally determined for transforming precursors into final mineral-like materials of the predicted structure types chosen in the framework of the geoecological approach. The framework structures of aluminosilicates and phosphates thus formed can fix cesium and strontium in the crystal lattice and ensure the geochemical equilibrium between the matrix and incorporating granitoid rocks under conditions of long-term disposal.

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Aluminosilicophosphate geoceramics as matrices for the immobilization of partitioned 90Sr and 137Cs wastes

Cited by 6 publications

References 2 publications

Immobilization behavior of Sr in geopolymer and its ceramic product

Immobilization behavior of Sr in geopolymer and its ceramic product

Synthesis of apatite phosphates containing Cs+, Sr2+ and RE3+ ions and chemical durability studies

Polyfunctional microspherical materials for long-term disposal of liquid radioactive wastes

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