Synthesis and characterization of ammonium molybdophosphate–silica nano-composite (AMP–SiO2) as a prospective sorbent for the separation of 137Cs from nuclear waste

Ingale, S. V.; Ram, Ramu; Sastry, P. U.; Wagh, P. B.; Kumar, Ratanesh; Niranjan, Ram; Phapale, S.; Tewari, R.; Dash, Ashutosh; Gupta, Satish C.

doi:10.1007/s10967-014-3143-9

Cited by 19 publications

(4 citation statements)

References 26 publications

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“…The procedure of preparing AMP/SiO 2 was adapted from other works [29][30][31] in slightly modified form. The AMP compound is known to be easily decomposed in basic solution [14] and thus ammonia solution was used to dissolve AMP with the addition of silica gel support.…”

Section: Preparation Of Amp/siomentioning

confidence: 99%

“…In order to solve this problem, AMP can be immobilized on inert supporting materials. Over the past 40 years, various approaches to immobilize AMP on an acceptable support matrix for column operation have been investigated, including alumina [22], zirconium phosphate [23], polyacrylonitrile [24][25][26][27][28], and porous silica gel [29][30][31]. Sebesta et al developed a mechanically durable compound by binding AMP with polyacrylonitrile (PAN) [24,25].…”

Section: Introductionmentioning

confidence: 99%

“…Others investigated the possibility to immobilize AMP on silica gel (SiO 2 ) to produce a more stable form. Their results showed that AMP/SiO 2 is a potentially efficient material for Cs-removal [18,[29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Selective Cs-removal from highly acidic spent nuclear fuel solutions

et al. 2020

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AbstractThirty liters of highly acidic spent nuclear fuel solutions need to be disposed at the “Hot Laboratory (hotlab)” facility in Paul Scherrer Institut (PSI), Switzerland. In order to significantly reduce the γ dose rate before proper disposal treatment, 137Cs must be removed. In the here presented sub-project, the ion-exchange method was evaluated. Two promising sorbents, CLEVASOL® and AMP (ammonium molybdophosphate), and two derived products AMP_PAN (AMP immobilized in polyacrylonitrile) and AMP/SiO2 (AMP immobilized on silica gel) were tested by the batch method using model solutions of important high-yield fission products (Cs, Eu, Zr, Ru, Pd and Ag), as well as U and Pu. The results showed that AMP, AMP/SiO2 and AMP_PAN have higher selectivity for Cs than CLEVASOL® in 0.1–8 M (mol/L) HNO3 solutions. 4 M HNO3 solution was identified as the most suitable condition for Cs-removal with AMP, AMP_PAN and AMP/SiO2 due to the still sufficiently high separation factor of Cs from other metal ions and an acceptable volume increase factor after dilution. The follow-up kinetic studies on AMP, AMP_PAN and AMP/SiO2 indicated that although Cs exchange on AMP and AMP/SiO2 is faster than on AMP_PAN in the first 5 min, they all nearly reach equilibrium after 30 min of contacting time. The isotherm curves of Cs adsorption on AMP, AMP_PAN and AMP/SiO2 in 4 M HNO3 showed that the maximum sorption capacity of Cs is reached asymptotically. The results from Langmuir isotherm modeling agree with results from other publications.

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Section: Preparation Of Amp/siomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Selective Cs-removal from highly acidic spent nuclear fuel solutions

et al. 2020

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“…As AMP is a fine powder with a microcrystalline structure, it is not conducive to separation from an aqueous solution after adsorption. Thus, materials with good hydrodynamic properties are used as a support or binding material for AMP particles, such as AMP@Al 2 O 3 , AMP@calcium alginate, and AMP@PAN . However, these materials have adsorption capacity below the theoretical adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Efficient Selective Adsorption of Rubidium and Cesium from Practical Brine Using a Metal–Organic Framework-Based Magnetic Adsorbent

Wang,

Zhang,

et al. 2024

Langmuir

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Rubidium (Rb) and cesium (Cs) have important applications in highly technical fields. Salt lakes contain huge reserves of Rb and Cs with industrial significance, which can be utilized after extraction. In this study, a composite magnetic adsorbent (Fe 3 O 4 @ZIF-8@AMP, AMP = ammonium phosphomolybdate) was prepared and its adsorption properties for Rb + and Cs + were studied in simulated and practical brine. The structure of the adsorbent was characterized by SEM, XRD, N 2 adsorption− desorption, FT-IR, and vibrating sample magnetometer (VSM). The adsorbent had good adsorption affinity for Rb + and Cs + . The Langmuir model and pseudo-second-order dynamics described the adsorbing isotherm and kinetic dates, respectively. The adsorption capacity and adsorption rate of Fe 3 O 4 @ZIF-8@AMP were increased by 1.86-and 2.5-fold compared with those of powdered crystal AMP, owing to the large specific surface area and high dispersibility of the adsorbent in the solution. The adsorbent was rapidly separated from the solution within 17 s using an applied magnetic field owing to the good magnetic properties. The composite adsorbent selectively adsorbed Rb + and Cs + from the practical brine even in the presence of a large number of coexisting ions. The promising adsorbent can be used to extract Rb + and Cs + from aqueous solutions.

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