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Huang FY, Wang Z, Yi FC, Liu Y, Wu YD, Luo Y, Jia WJ. Sorption Behavior and Mechanism of Simulated Radionuclide Nd(III) from Aqueous Solution by Bentonite. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422050107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Yang J, Shi K, Sun X, Gao X, Zhang P, Niu Z, Wu W. An approach for the efficient immobilization of 79Se using Fe-OOH modified GMZ bentonite. RADIOCHIM ACTA 2019. [DOI: 10.1515/ract-2019-3151] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Abstract
Because of high mobility, the immobilization of long-lived fission product 79Se (often existed as 79Se(IV) and 79Se(VI) anions) is a critical consideration in the repository of high-level radioactive waste. In this work, a Fe-OOH modified bentonite (Fe-OOH-bent) was synthesized as a potential filling material in the repository site for effective adsorption and present the migration of different species of 79Se. The adsorbent was characterized using FT-IR, XRD, XFS, zeta potential and BET to clarify its physical properties, compositions and structures. A good thermal and radiation stabilities of Fe-OOH-bent was confirmed by its stable uptake ratio for Se(IV) and Se(VI) compared to original samples. The batch experimental results show that Se(IV) and Se(VI) can be efficiently removed from aqueous by Fe-OOH-bent within 60 min with maximum adsorption capacities of 68.45 mg/g for Se(IV) and 40.47 mg/g for Se(VI) in the optimal conditions, indicating its high potential application in consideration of its simple synthesis process, low cost and high adsorption capacity in view of immobilization of 79Se. The surface species and variation of oxide state of Fe as well as Se(IV) and Se(VI) onto Fe-OOH-bent were investigated by XPS analysis. The values of relative area of Se(IV)–O and Se(VI)–O in XPS spectra followed the same tendency as their adsorption ratio with the variation of system pH, suggesting that the formation of complexes between selenium species and Fe-OOH-bent surface.
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Affiliation(s)
- Junqiang Yang
- Radiochemistry Lab , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P.R. China
| | - Keliang Shi
- Radiochemistry Lab , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P.R. China
- Key Laboratory of Special Function Materials and Structure Design , Ministry of Education, Lanzhou University , 730000 Lanzhou , P.R. China , Tel.: +86 931 8913278, Fax: +86 931 8913551
| | - Xuejie Sun
- Radiochemistry Lab , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P.R. China
| | - Xiaoqing Gao
- Radiochemistry Lab , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P.R. China
- Environmental Monitor Center of Gansu Province , 730000 Lanzhou , P.R. China
| | - Peng Zhang
- Radiochemistry Lab , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P.R. China
| | - Zhiwei Niu
- Radiochemistry Lab , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P.R. China
- Key Laboratory of Special Function Materials and Structure Design , Ministry of Education, Lanzhou University , 730000 Lanzhou , P.R. China
| | - Wangsuo Wu
- Radiochemistry Lab , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P.R. China
- Key Laboratory of Special Function Materials and Structure Design , Ministry of Education, Lanzhou University , 730000 Lanzhou , P.R. China , Tel.: +86 931 8913278, Fax: +86 931 8913551
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Removal of U(VI) and Th(IV) from aqueous solutions by organically modified diatomaceous earth: Evaluation of equilibrium, kinetic and thermodynamic data. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.minpro.2017.08.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kaynar ÜH, Ayvacıklı M, Hiçsönmez Ü, Kaynar SÇ. Removal of thorium (IV) ions from aqueous solution by a novel nanoporous ZnO: Isotherms, kinetic and thermodynamic studies. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2015; 150:145-151. [PMID: 26322940 DOI: 10.1016/j.jenvrad.2015.08.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 08/14/2015] [Accepted: 08/20/2015] [Indexed: 06/04/2023]
Abstract
The adsorption of thorium (IV) from aqueous solutions onto a novel nanoporous ZnO particles prepared by microwave assisted combustion was studied using batch methods under different experimental conditions. The effect of contact time, solution pH, initial concentration and temperature on adsorption process was studied. The ability of this material to remove Th (IV) from aqueous solution was characterises by Langmuir, Freunlinch and Temkin adsorption isotherms. The adsorption percent and distribution coefficient for nanoporous ZnO powders in optimum conditions were 97% ± 1.02; 8080 L kg(-1)for Th (IV), respectively. Based on the Langmuir model, the maximum adsorption capacity of nanoporous ZnO for Th (IV) was found to be 1500 g kg(-1). Thermodynamic parameters were determined and discussed. The results indicated that nanoporous ZnO was suitable as sorbent material for recovery and adsorption of Th (IV) ions from aqueous solutions. The radioactive Th (VI) in surface water, sea water and waste waters from technologies producing nuclear fuels, mining (uranium and thorium) and laboratories working with radioactive materials (uranium and thorium) can be removed with this nanoporous ZnO.
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Affiliation(s)
- Ümit H Kaynar
- Celal Bayar University, Education Faculty, Primary School Science Teaching, Demirci, Manisa, Turkey.
| | | | - Ümran Hiçsönmez
- Celal Bayar University, Department of Chemistry, Manisa, Turkey
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Boggs MA, Dai Z, Kersting AB, Zavarin M. Plutonium(IV) sorption to montmorillonite in the presence of organic matter. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2015; 141:90-96. [PMID: 25562752 DOI: 10.1016/j.jenvrad.2014.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 12/11/2014] [Accepted: 12/12/2014] [Indexed: 06/04/2023]
Abstract
The effect of altering the order of addition in a ternary system of plutonium(IV), organic matter (fulvic acid, humic acid and desferrioxamine B), and montmorillonite was investigated. A decrease in Pu(IV) sorption to montmorillonite in the presence of fulvic and humic acid relative to the binary Pu-montmorillonite system, is attributed to strong organic aqueous complex formation with aqueous Pu(IV). No dependence on the order of addition was observed. In contrast, in the system where Pu(IV) was equilibrated with desferrioxamine B (DFOB) prior to addition of montmorillonite, an increase in Pu(IV) sorption was observed relative to the binary system. When DFOB was equilibrated with montmorillonite prior to addition of Pu(IV), Pu(IV) sorption was equivalent to the binary system. X-ray diffraction and transmission electron microscopy revealed that DFOB accumulated in the interlayer of montmorillonite. The order of DFOB addition plays an important role in the observed sorption/desorption behavior of Pu. The irreversible nature of DFOB accumulation in the montmorillonite interlayer leads to an apparent dependence of Pu sorption on the order of addition in the ternary system. This work demonstrates that the order of addition will be relevant in ternary systems in which at least one component exhibits irreversible sorption behavior.
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Affiliation(s)
- Mark A Boggs
- Glenn T. Seaborg Institute, Physical and Life Sciences, Lawrence Livermore National Laboratory, PO Box 808 L-231, 94550 CA, USA.
| | - Zurong Dai
- Glenn T. Seaborg Institute, Physical and Life Sciences, Lawrence Livermore National Laboratory, PO Box 808 L-231, 94550 CA, USA
| | - Annie B Kersting
- Glenn T. Seaborg Institute, Physical and Life Sciences, Lawrence Livermore National Laboratory, PO Box 808 L-231, 94550 CA, USA
| | - Mavrik Zavarin
- Glenn T. Seaborg Institute, Physical and Life Sciences, Lawrence Livermore National Laboratory, PO Box 808 L-231, 94550 CA, USA
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Carrier facilitated transport of thorium from HCl medium using Cyanex 923 in n-dodecane containing supported liquid membrane. J Radioanal Nucl Chem 2013. [DOI: 10.1007/s10967-013-2576-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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