Evaluation study on silica/polymer-based CA-BTP adsorbent for the separation of minor actinides from simulated high-level liquid wastes

Ning, Shunyan; Zou, Qing; Wang, Xinpeng; Liu, Rui‐Qin; Wei, Yuezhou; Zhao, Yaping; Ding, Ya

doi:10.1007/s10967-015-4248-5

Cited by 26 publications

(7 citation statements)

References 18 publications

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“…The results above indicates that Me 2 -CA-BTP/SiO 2 -P has the potential to directly separate MA from high nitric acid (3 M) HLLW. The adsorption ability and the applicable acidity range of Me 2 -CA-BTP/SiO 2 -P towards Am(III) has been improved and enlarged compared with CA-BTP which only exhibited good adsorption ability towards Am(III) in 0.5–1 M HNO 3 and CyMe 4 -BTBP whose adsorption ability towards Am(III) increased as HNO 3 concentration increased in 0.1–2 M HNO 3 and isoHex-BTP which only exhibited good adsorption towards 241 Am(III) in ≥ 2 M HNO 3 solution 28 , 37 , 38 .…”

Section: Resultsmentioning

confidence: 99%

Direct separation of minor actinides from high level liquid waste by Me 2 -CA-BTP/SiO2-P adsorbent

Ning

Wang

Zou

et al. 2017

Sci Rep

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Directly separating minor actinides (MA: Am, Cm, etc.) from high level liquid waste (HLLW) containing lanthanides and other fission products is of great significance for the whole nuclear fuel cycle, especially in the aspects of reducing long-term radioactivity and simplifying the post-processing separation process. Herein, a novel silica-based adsorbent Me2-CA-BTP/SiO2-P was prepared by impregnating Me2-CA-BTP (2,6-bis(5,6,7,8-tetrahydro-5,8,9,9-tetramethyl-5,8-methano-1,2,4-benzotriazin-3-yl)pyridine) into porous silica/polymer support particles (SiO2-P) under reduced pressure. It was found Me2-CA-BTP/SiO2-P exhibited good adsorption selectivity towards 241Am(III) over 152Eu(III) in a wide nitric acid range, acceptable adsorption kinetic, adequate stability against γ irradiation in 1 and 3 M HNO3 solutions, and successfully separated 241Am(III) from simulated 3 M HNO3 HLLW. In sum, considering the good overall performance of Me2-CA-BTP/SiO2-P adsorbent, it has great application potential for directly separating MA from HLLW, and is expected to establish an advanced simplified MA separation process, which is very meaningful for the development of nuclear energy.

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Section: Resultsmentioning

confidence: 99%

Direct separation of minor actinides from high level liquid waste by Me 2 -CA-BTP/SiO2-P adsorbent

Ning

Wang

Zou

et al. 2017

Sci Rep

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“…BTPs have received wide attention due to their high selectivity of MA(III) over Ln (III) from nitrate solutions. BTPs have been developed by modifications with branched alkyl groups, such isopropyl-BTP, isobutyl-BTP, and isohexyl-BTP [120,121], in addition to BTPs with cyclic structures, e.g., CA-BTP, CyMe 4 -BTP, and Me 2 -CA-BTP [60,122,123], which have been designed and synthesized for the purpose of improving the stability. Based on BTPs’ solubilities, Wei et al proposed and designed a compact and effective chromatographic extraction process using a BTP/SiO 2 -P adsorbent to separate MA(III) from High-level radioactive waste liquid (HLLW).…”

Section: Porous Silica-based Nanoparticles Modified By Organic Matmentioning

confidence: 99%

“…Moreover, dry CA-BTP/SiO 2 -P demonstrated no instability when the radiation dose was up to 161 kGy. The CA-BTP/SiO 2 -P adsorbent is a potential candidate for separating 241 Am (III), 239 Pu (IV), and 99 Tc (VII) from high-level radioactive waste liquid [ 60 ].…”

Section: Porous Silica-based Nanoparticles Modified By Organic Matmentioning

confidence: 99%

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Functionalized Porous Silica-Based Nano/Micro Particles for Environmental Remediation of Hazard Ions

Wang

Jiao

et al. 2019

Nanomaterials

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The adsorption and separation of hazard metal ions, radioactive nuclides, or minor actinides from wastewater and high-level radioactive waste liquids using functional silica-based nano/micro-particles modified with various inorganic materials or organic groups, has attracted significant attention since the discovery of ordered mesoporous silica-based substrates. Focusing on inorganic and organic modified materials, the synthesis methods and sorption performances for specific ions in aqueous solutions are summarized in this review. Three modification methods for silica-based particles, the direct synthesis method, wetness impregnation method, and layer-by-layer (LBL) deposition, are usually adopted to load inorganic material onto silica-based particles, while the wetness impregnation method is currently used for the preparation of functional silica-based particles modified with organic groups. Generally, the specific synthesis method is employed based on the properties of the loading materials and the silicon-based substrate. Adsorption of specific toxic ions onto modified silica-based particles depends on the properties of the loaded material. The silicon matrix only changes the thermodynamic and mechanical properties of the material, such as the abrasive resistance, dispersibility, and radiation resistance. In this paper, inorganic loads, such as metal phosphates, molybdophosphate, titanate-based materials, and hydrotalcite, in addition to organic loads, such as 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-Calix{4}arene (Calix {4}) arene-R14 and functional 2,6-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-pyridines(BTP) are reviewed. More specifically, we emphasize on the synthesis methods of such materials, their structures in relation to their capacities, their selectivities for trapping specific ions from either single or multi-component aqueous solutions, and the possible retention mechanisms. Potential candidates for remediation uses are selected based on their sorption capacities and distribution coefficients for target cations and the pH window for an optimum cation capture.

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“…26 To overcome the disadvantages of liquid-liquid extraction, systems based on solid phase extractants have been proposed. [23][24][25][26][27][28] We have recently developed and reported magnetic nanoparticle (MNP) and silica gel-based solid phase extractants ( Figure. 2), where we have demonstrated that immobilized BTPhen type ligands could be used either to extract both An(III) and Ln(III) at low concentrations of HNO3 or to extract An(III) selectively over Ln(III) at high concentrations of HNO3. 29,30 Previously, we reported a partitioning process for minor actinides and lanthanides based on a column separation technique using the novel tetra(4-hydroxyphenyl)-BTPhen-functionalized SiO2 gel 5.…”

mentioning

confidence: 99%

Separation of Minor Actinides from Lanthanides Using Immobilized Ligand Systems: The Role of the Counterion

Afsar¹,

Distler²,

Harwood³

et al. 2019

HETEROCYCLES

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A CyMe4-BTPhen functionalized silica gel that selectively extracts Am(III) over Eu(III) from 4 M HNO3 with a separation factor > 154 has been developed. Evidence is presented that the counterion surrounding the M(III) in the proposed 1:1 [BTPhen:M(III)] complex plays an important role in the complexation of Am(III) and Eu(III). Separation of minor actinides (Am/Cm) from lanthanides is a key step in the reduction of radiotoxicity and thermal emission of nuclear waste. 1 The removal of these elements, which account for ~ 0.1% by

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Evaluation study on silica/polymer-based CA-BTP adsorbent for the separation of minor actinides from simulated high-level liquid wastes

Cited by 26 publications

References 18 publications

Direct separation of minor actinides from high level liquid waste by Me 2 -CA-BTP/SiO2-P adsorbent

Direct separation of minor actinides from high level liquid waste by Me 2 -CA-BTP/SiO2-P adsorbent

Functionalized Porous Silica-Based Nano/Micro Particles for Environmental Remediation of Hazard Ions

Separation of Minor Actinides from Lanthanides Using Immobilized Ligand Systems: The Role of the Counterion

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