Improvement of Cs leaching resistance of solidified radwastes with copper ferrocyanide (CFC)-vermiculite

Huang, Chin‐Cheng; Wu, Garry

doi:10.1016/s0956-053x(99)00133-6

Cited by 17 publications

(13 citation statements)

References 8 publications

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“…However, MHCFs prepared by mixing a solution of the transition metal salt with a solution of Hexacyanoferrates salt had small particle size and might even be colloidal, so the powder-like resultants were in fact unsuitable for practical application. In order to improve their mechanical properties, several investigators have resorted to the use of a support, and these include polyacrylonitrile binding polymer for CuHCF and NiHCF (13), porous silica for CuHCF (14) and NiHCF (15), zeolites for NiHCF (16,17), vermiculite for CuHCF (18). For a typical instance, Yue (19) reported the immobilization of copper ferrocyanide on mesoporous ceramic backbone.…”

Section: Supporting Of Potassium Copper Hexacyanoferrate On Porous Acmentioning

confidence: 99%

Supporting of Potassium Copper Hexacyanoferrate on Porous Activated Carbon Substrate for Cesium Separation

Wang

Feng

Liu

et al. 2009

Separation Science and Technology

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Activated carbon (AC) was chosen for carrying potassium copper hexacyanoferrate (KCuCF) to prepare a new Cs-selective material. The adsorbent was prepared by repetitious batch precipitation reaction of Cu 2þ with [Fe(CN) 6 ] 4À . Characterization analyses identified the backbone formula of the activated carbon-supported KCuCF with K 2 Cu[Fe(CN) 6 ], and shown the successful loading of KCuCF microcrystals on the porous carbon substrate with a loading percentage of 12.5 wt%, and with BET specific surface area and a total pore volume of 527.8 m 2 =g and 0.38 cm 3 =g for AC and 160.8 m 2 =g and 0.16 cm 3 =g for KCuCF-loaded activated carbon (KCuCF-AC), respectively. The optimal Cs adsorption capacity of about 0.46 mmol Á g À1 was observed between the HNO 3 concentration of 0.5-1.5 M, and the capacity even reached to 0.38 mmol Á g À1 in the presence of a large amount of competing cations. The results indicate that activated carbon has no significant effect on the selectivity of the as-synthesized composite.

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Section: Supporting Of Potassium Copper Hexacyanoferrate On Porous Acmentioning

confidence: 99%

Supporting of Potassium Copper Hexacyanoferrate on Porous Activated Carbon Substrate for Cesium Separation

Wang

Feng

Liu

et al. 2009

Separation Science and Technology

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“…In this paper, we use potassium copper hexacyanoferrate (KCuHCF), as an example of a MHCF. KCuHCF shows excellent Cs adsorption performance, even in high-pH conditions, [29][30][31][32] and has a low fabrication cost. In general, an increase in the surface area of the adsorbent improves the adsorption performance.…”

Section: Introductionmentioning

confidence: 99%

Efficient synthesis of size-controlled open-framework nanoparticles fabricated with a micro-mixer: route to the improvement of Cs adsorption performance

et al. 2015

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We demonstrated an efficient method for size-controlled nanoparticles of the open framework coordination polymer potassium copper hexacyanoferrate (KCuHCF) using only aqueous solutions of the raw materials and a Y-type micro-mixer. Despite the high viscosity of the synthesized NP slurry, the micromixer provides continuous synthesis without clogging for a few hours with a high flow rate of 100 mL min −1 , i.e. a linear velocity of 94 m s −1 . The crystallite size, evaluated by the Scherrer equation using X-ray diffraction measurements, can be controlled by changing the flow rate. With the highest flow rate of 100 mL min −1 , the smallest NPs with a size of ∼11 nm were obtained, less than half of the NP size obtained using the batch method. By downsizing the nanoparticles (NPs) using the micro-mixer synthesis, the Cs adsorption performance of potassium copper hexacyanoferrate (KCuHCF) was drastically improved. The KCuHCF with the smallest primary particles showed the fastest Cs adsorption: 1.4 times in the saturated capacity, 3.9 times in the distribution coefficient, and 7.7 times in the rate constant for the pseudo-second order adsorption theory, compared with the batch-synthesized sample.

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“…The details of other sorption studies are presented elsewhere [Jha, et al, 1966;Sebastian, et al, 1973;Lee, 1974;Komarneni and Roy, 1978, 1979,1981Plecas, et al, 1990;Tymochowicz, 1981;Vejmelka et al, 1990;Gelis and Kozlitin, 1993;Singh et al, 1995;Bors et al, 1996;Gougar et al, 1996;Doilnitsyn et al, 1997;Huang and Wu, 1999;Doh and Lee, 2001]. …”

Section: Vermiculitementioning

confidence: 99%

State of the Art Report on High-Level Waste Tank Closure

Langton¹

2002

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Improvement of Cs leaching resistance of solidified radwastes with copper ferrocyanide (CFC)-vermiculite

Cited by 17 publications

References 8 publications

Supporting of Potassium Copper Hexacyanoferrate on Porous Activated Carbon Substrate for Cesium Separation

Supporting of Potassium Copper Hexacyanoferrate on Porous Activated Carbon Substrate for Cesium Separation

Efficient synthesis of size-controlled open-framework nanoparticles fabricated with a micro-mixer: route to the improvement of Cs adsorption performance

State of the Art Report on High-Level Waste Tank Closure

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