Immobilization of Radioactive Wastes into Perovskite Synrock by the SHS Method

Zhang, Ruizhu; Guo, Zhi Meng; Cheng, Junyi; Lu, Guangfeng

doi:10.4028/0-87849-960-1.1627

Cited by 4 publications

(4 citation statements)

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“…First, the reactants CrO 3 , Ti, SrO, and TiO 2 were put into stainless steel tanks o grinding to 70 µm, then the powder were mixed [6][7][8] at a certain molar ratio of 2:3:4:1 after sieving. Take 30g mixtures into the mold with the specification set as d×h= 25mm ×180mm.…”

Section: Methodsmentioning

confidence: 99%

Influential Factors of SHS-Densification Methods of Solidified Nuclear Waste in SrTiO<sub>3</sub> Synroc

Zhang

et al. 2011

AMM

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Through self-propagation high–temperature synthesis (SHS), SrTiO3 in which Sr2+ had been included was solidified. The actors permitted to the solid dendification were analyzed by experimentation. Optimal process parameters were obtained for preparing SrTiO3 and composites, including 56% of density of preform, 10 MPa of pre-pressure P1, 4 s of pressing time t1; 300 MPa of high pressure P2 and 8 s of dwell time t2 at high pressure period.

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Section: Methodsmentioning

confidence: 99%

Influential Factors of SHS-Densification Methods of Solidified Nuclear Waste in SrTiO<sub>3</sub> Synroc

Zhang

et al. 2011

AMM

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“…The compacted materials exhibit some porosity which decreases the final density. In fact, in the published studies, perovskite is in a powder form [48][49][50]. O.P.…”

Section: Materials Densitymentioning

confidence: 99%

“…Shrivastava and R. Srivastava [49] published comparable results (4350 kg/m 3 ) for an orthorhombic perovskite, Ca1-xSrxTiO3 (0.02<x<0.2), obtained by sintering at 1150°C during 6h. R. Zhang et al [50] reported a 4200 kg/m 3 density for a perovskite titanate Synroc, synthesized by the self-propagating high-temperature method with a SrO content over 35 wt.%.…”

Section: Materials Densitymentioning

confidence: 99%

Ftir and Raman Spectroscopic Study of a Complex Perovskite: Ca_0.91-XCe_0.09Rb_0.04Cs_x[(Zr_0.50Ti_0.45)Al_0.05]O₃, X=0.2 to 0.4, Dedicated for Radioactive Waste Confinement

M.Hasnat¹,

Kamel

Moudir

et al. 2020

Advances in Materials Science

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AbstractPerovskite is able to sequester simultaneously, in its structure, both actinides and alkaline-earth elements. This study is an attempt to synthesize a complex perovskite Ca0.91-xCe0.09Rb0.04Csx[(Zr0.50Ti0.45)Al0.05]O3 (0.2≤x≤0.4), doped in the same time, with Ce, Cs and Rb. The synthesis is conducted by sintering at 1150°C during 16h. XRX analysis confirms the perovskite formation. SEM observations show a less porous microstructure. FTIR analysis reveals TiO6, Ti-O-Ti, Ti-O and Zr-O vibrations. Raman spectroscopy indicates many orthorhombic perovskite active modes, as: Ti-O6 and Ti-O3 torsions, ZrO7, CaO8 vibrations, the totally symmetric oxygen, and the O-octahedron cage rotation.

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“…It is also characterized by process simplicity, short reaction time, easy-to-build equipments, lowenergy requirements and the possibility of obtaining complex or meta-stable phases [22]. Furthermore, hazardous wastes, such as radioactive wastes [23], asbestos [24], and zinc hydrometallurgical waste [25], can be fixed into a highly insoluble polysilicate or pervoskite structure if the thermite reactions were appropriately designed. In this paper, SHS was used to dispose hazardous waste CRT glass.…”

Section: Introductionmentioning

confidence: 99%

Detoxification of cathode ray tube glass by self-propagating process

Chen

Zhang

Zhu

2009

Journal of Hazardous Materials

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a b s t r a c tA novel process for the treatment of hazardous waste Cathode Ray Tube (CRT) glass, based on selfpropagating reaction, was proposed. In the process, various types of CRT glass powders were blended with suitable amount of ferric oxide and magnesium, and the mixtures could generate self-propagating reaction once locally ignited by a thermal source. Generally, the self-propagating reaction could be well maintained when the CRT glass content in the mixture was no more than 60 wt.%, and the combustion wave velocity and maximum combustion temperature decreased along with the increase in glass amount. XPS experiments showed that heavy elements in the final products became more stable and were solidified during the process. Leaching tests demonstrated that heavy metals in the final products fulfilled the environmental regulations of USEPA. It is supposed that the detoxified products have the potential of being used as construction materials.

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Immobilization of Radioactive Wastes into Perovskite Synrock by the SHS Method

Cited by 4 publications

References 0 publications

Influential Factors of SHS-Densification Methods of Solidified Nuclear Waste in SrTiO<sub>3</sub> Synroc

Influential Factors of SHS-Densification Methods of Solidified Nuclear Waste in SrTiO<sub>3</sub> Synroc

Ftir and Raman Spectroscopic Study of a Complex Perovskite: Ca_0.91-XCe_0.09Rb_0.04Cs_x[(Zr_0.50Ti_0.45)Al_0.05]O₃, X=0.2 to 0.4, Dedicated for Radioactive Waste Confinement

Detoxification of cathode ray tube glass by self-propagating process

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Immobilization of Radioactive Wastes into Perovskite Synrock by the SHS Method

Cited by 4 publications

References 0 publications

Influential Factors of SHS-Densification Methods of Solidified Nuclear Waste in SrTiO<sub>3</sub> Synroc

Influential Factors of SHS-Densification Methods of Solidified Nuclear Waste in SrTiO<sub>3</sub> Synroc

Ftir and Raman Spectroscopic Study of a Complex Perovskite: Ca0.91-XCe0.09Rb0.04Csx[(Zr0.50Ti0.45)Al0.05]O3, X=0.2 to 0.4, Dedicated for Radioactive Waste Confinement

Detoxification of cathode ray tube glass by self-propagating process

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Ftir and Raman Spectroscopic Study of a Complex Perovskite: Ca_0.91-XCe_0.09Rb_0.04Cs_x[(Zr_0.50Ti_0.45)Al_0.05]O₃, X=0.2 to 0.4, Dedicated for Radioactive Waste Confinement