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Removal of cesium ions from A-type zeolites using sodium tetrakis(4-fluorophenyl)borate and sodium tetraphenylborate. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-020-07514-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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2
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Gwak GH, Yamaguchi T, Kim MK, Park JK, Oh JM. Silver nanoplate-pillared mesoporous nano-clays for surface enhanced raman scattering. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.05.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Park SM, Alessi DS, Baek K. Selective adsorption and irreversible fixation behavior of cesium onto 2:1 layered clay mineral: A mini review. JOURNAL OF HAZARDOUS MATERIALS 2019; 369:569-576. [PMID: 30818121 DOI: 10.1016/j.jhazmat.2019.02.061] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 01/19/2019] [Accepted: 02/18/2019] [Indexed: 06/09/2023]
Abstract
In this study, we reviewed the selective adsorption and irreversible fixation of cesium (Cs+) on clay minerals. The selective adsorption of Cs+ results from reactions with frayed edge sites (FES) of clay minerals. The content of FES is about 0.1-2.0% of the total cation exchange capacity (CEC). The fractionation of Cs+ in actual accident sites mainly exists as a residue, which is important because it is closely related to the strong binding between Cs+ and soils. Cs+ adsorbed onto FES can move into the deeper interlayer via weathering processes, thereby Cs+ can be irreversibly fixed in the interlayer of non-expanding 2:1 layered clay mineral. Additionally, Cs+ can be adsorbed in the interlayer of the expanding clay mineral and can be fixed by interlayer collapse. For this reason, Cs+ adsorption onto FES is defined as 'selective adsorption' subsequent sorption in the interlayer as 'irreversible fixation'. Furthermore, the extended X-ray absorption fine structure (EXAFS) analysis can confirm that Cs+ bound to illite is coordinated with the outer surface (OOS) and interlayer surface oxygens (OIS) through FES or interlayer sites. Through these processes, Cs+ is adsorbed selectively onto FES, while Cs+ can subsequently move into the interlayer and become more strongly fixed.
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Affiliation(s)
- Sang-Min Park
- Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, Jeollabukdo, 561-756, Republic of Korea
| | - Daniel S Alessi
- Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, T6G 2E3, Canada
| | - Kitae Baek
- Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, Jeollabukdo, 561-756, Republic of Korea.
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4
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Kim D, Jo A, Yang HM, Seo BK, Lee KW, Lee TS. Colorimetric detection and removal of radioactive Co ions using sodium alginate-based composite beads. JOURNAL OF HAZARDOUS MATERIALS 2017; 326:69-76. [PMID: 27987452 DOI: 10.1016/j.jhazmat.2016.12.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 11/15/2016] [Accepted: 12/02/2016] [Indexed: 06/06/2023]
Abstract
We demonstrate a simple method for the visual determination and removal of Co ions using a bead-shaped, capturing probe based on hybridized sodium alginate. For Co ions, the designed protocol consisted of three main constituents: an azopyridine-based Co ion-probe for visual detection; sodium alginate as an adsorbent for the Co ion and a bead construct for removal and structure; silica as a linker for the probe and the alginate, leading to a robust structure. When the composite beads were exposed to Co ions, the yellow color of the beads turned to intensive violet and the color intensity was associated with the Co ion concentration. The color variation was quantified using red-green-blue (RGB) color values that were obtained with a scanner and evaluated with Photoshop. The technique achieved both visual recognition with obvious color change of the beads and efficient removal of the radioactive 60Co ion. The sensing and removal of any radioactive isotope could be achieved with an appropriate sensing probe, to provide a simple and universal platform for remediation.
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Affiliation(s)
- Daigeun Kim
- Organic and Optoelectronic Materials Laboratory, Department of Organic Materials Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Ara Jo
- Organic and Optoelectronic Materials Laboratory, Department of Organic Materials Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Hee-Man Yang
- Decontamination and Decommissioning Research Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
| | - Bum-Kyoung Seo
- Decontamination and Decommissioning Research Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
| | - Kune-Woo Lee
- Decontamination and Decommissioning Research Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
| | - Taek Seung Lee
- Organic and Optoelectronic Materials Laboratory, Department of Organic Materials Engineering, Chungnam National University, Daejeon 34134, Republic of Korea.
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Michel C, Barré Y, de Dieuleveult C, Grandjean A, De Windt L. Cs ion exchange by a potassium nickel hexacyanoferrate loaded on a granular support. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2015.07.043] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Miller A, Kruichak J, Mills M, Wang Y. Iodide uptake by negatively charged clay interlayers? JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2015; 147:108-114. [PMID: 26057987 DOI: 10.1016/j.jenvrad.2015.05.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 05/21/2015] [Accepted: 05/26/2015] [Indexed: 06/04/2023]
Abstract
Understanding iodide interactions with clay minerals is critical to quantifying risk associated with nuclear waste disposal. Current thought assumes that iodide does not interact directly with clay minerals due to electrical repulsion between the iodide and the negatively charged clay layers. However, a growing body of work indicates a weak interaction between iodide and clays. The goal of this contribution is to report a conceptual model for iodide interaction with clays by considering clay mineral structures and emergent behaviors of chemical species in confined spaces. To approach the problem, a suite of clay minerals was used with varying degrees of isomorphic substitution, chemical composition, and mineral structure. Iodide uptake experiments were completed with each of these minerals in a range of swamping electrolyte identities (NaCl, NaBr, KCl) and concentrations. Iodide uptake behaviors form distinct trends with cation exchange capacity and mineral structure. These trends change substantially with electrolyte composition and concentration, but do not appear to be affected by solution pH. The experimental results suggest that iodide may directly interact with clays by forming ion-pairs (e.g., NaI(aq)) which may concentrate within the interlayer space as well as the thin areas surrounding the clay particle where water behavior is more structured relative to bulk water. Ion pairing and iodide concentration in these zones is probably driven by the reduced dielectric constant of water in confined space and by the relatively high polarizability of the iodide species.
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Affiliation(s)
- Andrew Miller
- Emporia State University, 1 Kellogg Circle, Emporia, KS, 66801, United States.
| | - Jessica Kruichak
- Sandia National Laboratories, 1515 Eubank SE, Albuquerque, NM, 87185-0779, United States
| | - Melissa Mills
- Sandia National Laboratories, 1515 Eubank SE, Albuquerque, NM, 87185-0779, United States
| | - Yifeng Wang
- Sandia National Laboratories, 1515 Eubank SE, Albuquerque, NM, 87185-0779, United States
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8
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Borisover M, Davis JA. Adsorption of Inorganic and Organic Solutes by Clay Minerals. NATURAL AND ENGINEERED CLAY BARRIERS 2015. [DOI: 10.1016/b978-0-08-100027-4.00002-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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9
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Tamura K, Sato H, Yamagishi A. Desorption of Cs+ ions from a vermiculite by exchanging with Mg2+ ions: effects of Cs+-capturing ligand. J Radioanal Nucl Chem 2014. [DOI: 10.1007/s10967-014-3744-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Pallagi A, Bajnóczi ÉG, Canton SE, Bolin T, Peintler G, Kutus B, Kele Z, Pálinkó I, Sipos P. Multinuclear complex formation between Ca(II) and gluconate ions in hyperalkaline solutions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:6604-6611. [PMID: 24865662 DOI: 10.1021/es501067w] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Alkaline solutions containing polyhydroxy carboxylates and Ca(II) are typical in cementitious radioactive waste repositories. Gluconate (Gluc(-)) is a structural and functional representative of these sugar carboxylates. In the current study, the structure and equilibria of complexes forming in such strongly alkaline solutions containing Ca(2+) and gluconate have been studied. It was found that Gluc(-) significantly increases the solubility of portlandite (Ca(OH)2(s)) under these conditions and Ca(2+) complexes of unexpectedly high stability are formed. The mononuclear (CaGluc(+) and [CaGlucOH](0)) complexes were found to be minor species, and predominant multinuclear complexes were identified. The formation of the neutral [Ca2Gluc(OH)3](0) (log β213 = 8.03) and [Ca3Gluc2(OH)4](0) (log β324 = 12.39) has been proven via H2/Pt-electrode potentiometric measurements and was confirmed via XAS, (1)H NMR, ESI-MS, conductometry, and freezing-point depression experiments. The binding sites of Gluc(-) were identified from multinuclear NMR measurements. Besides the carboxylate group, the O atoms on the second and third carbon atoms were proved to be the most probable sites for Ca(2+) binding. The suggested structure of the trinuclear complex was deduced from ab initio calculations. These observations are of relevance in the thermodynamic modeling of radioactive waste repositories, where the predominance of the binuclear Ca(2+) complex, which is a precursor of various high-stability ternary complexes with actinides, is demonstrated.
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Affiliation(s)
- Attila Pallagi
- Department of Inorganic and Analytical Chemistry and ‡Materials and Solution Structure Research Group, University of Szeged , Dóm tér 7, Szeged, H-6720 Hungary
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Tachi Y, Yotsuji K, Suyama T, Ochs M. Integrated sorption and diffusion model for bentonite. Part 2: porewater chemistry, sorption and diffusion modeling in compacted systems. J NUCL SCI TECHNOL 2014. [DOI: 10.1080/00223131.2014.914453] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ding D, Lei Z, Yang Y, Feng C, Zhang Z. Nickel oxide grafted andic soil for efficient cesium removal from aqueous solution: adsorption behavior and mechanisms. ACS APPLIED MATERIALS & INTERFACES 2013; 5:10151-10158. [PMID: 24045068 DOI: 10.1021/am402836b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
An andic soil, akadama clay, was modified with nickel oxide and tested for its potential application in the removal of cesium from aqueous solution. Scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), and powder X-ray diffraction (XRD) results revealed the nickel oxide was successfully grafted into akadama clay. N2 adsorption-desorption isotherms indicated the surface area decreased remarkably after modification while the portion of mesopores increased greatly. Thermogravimetric-differential thermal analysis (TG-DTA) showed the modified akadama clay had better thermostability than the pristine akadama clay. Decreases in cation exchange capacity (CEC) and ζ-potential were also detected after the modification. Adsorption kinetic and isotherm studies indicated the adsorption of Cs+ on the modified akadama clay was a monolayer adsorption process. Adsorption capacity was greatly enhanced for the modified akadama clay probably due to the increase in negative surface charge caused by the modification. The adsorption of Cs+ on the modified akadama clay was dominated by an electrostatic adsorption process. Results of this work are of great significance for the application of akadama clay as a promising adsorbent material for cesium removal from aqueous solutions.
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Affiliation(s)
- Dahu Ding
- Graduate School of Life and Environmental Sciences, University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
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Churakov SV. Mobility of Na and Cs on montmorillonite surface under partially saturated conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:9816-9823. [PMID: 23909661 DOI: 10.1021/es401530n] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Cs migration in soils at contaminated sites or in clay-rich backfill of waste disposal sites can take place under partially saturated conditions. To understand the molecular mechanism of Cs migration in partially saturated clays, Grand Canonical Monte Carlo simulations were applied to model adsorption of water films onto external surfaces of Cs and Na montmorillonites as function of partial water pressure. The surface complexation and diffusivity of Cs and Na at different partial water pressure was obtained by molecular dynamics simulations. The results suggest that ion mobility in adsorbed water films on external basal surfaces of clay is similar to that in the near-surface water of a saturated pore as far as the thickness of the adsorbed water film is more than two water layers. At lower partial water pressure (i.e., in thinner water films) the ion mobility dramatically decreases. In contrast, the average water mobility in thin water film is higher than in the water-saturated system due to enhanced mobility of water molecules close to vapor-film interface. The results of the simulations were applied to interpret recent laboratory measurements of tritiated water and Cs diffusivity in Callovo-Oxfordian Claystones under partially saturated conditions.
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Affiliation(s)
- Sergey V Churakov
- Laboratory for Waste Management, Paul Scherrer Institute , 5232 Villigen-PSI, Switzerland
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Miller AW, Wang Y. Radionuclide interaction with clays in dilute and heavily compacted systems: a critical review. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:1981-1994. [PMID: 22257091 DOI: 10.1021/es203025q] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Given the unique properties of clays (i.e., low permeability and high ion sorption/exchange capacity), clays or clay formations have been proposed either as an engineered material or as a geologic medium for nuclear waste isolation and disposal. A credible evaluation of such disposal systems relies on the ability to predict the behavior of these materials under a wide range of thermal-hydrological-mechanical-chemical (THMc) conditions. Current model couplings between THM and chemical processes are simplistic and limited in scope. This review focuses on the uptake of radionuclides onto clay materials as controlled by mineral composition, structure, and texture (e.g., pore size distribution), and emphasizes the connections between sorption chemistry and mechanical compaction. Variable uptake behavior of an array of elements has been observed on various clays as a function of increasing compaction due to changes in pore size and structure, hydration energy, and overlapping electric double layers. The causes for this variability are divided between "internal" (based on the fundamental structure and composition of the clay minerals) and "external" (caused by a force external to the clay). New techniques need to be developed to exploit known variations in clay mineralogy to separate internal from external effects.
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Affiliation(s)
- Andrew W Miller
- Sandia National Laboratory, Albuquerque, New Mexico 87123, United States.
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15
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Influence of montmorillonite tactoid size on Na–Ca cation exchange reactions. J Colloid Interface Sci 2011; 364:443-54. [DOI: 10.1016/j.jcis.2011.07.039] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 07/12/2011] [Accepted: 07/13/2011] [Indexed: 11/18/2022]
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Glaus MA, Frick S, Rossé R, Van Loon LR. Consistent interpretation of the results of through-, out-diffusion and tracer profile analysis for trace anion diffusion in compacted montmorillonite. JOURNAL OF CONTAMINANT HYDROLOGY 2011; 123:1-10. [PMID: 21194786 DOI: 10.1016/j.jconhyd.2010.11.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Revised: 11/22/2010] [Accepted: 11/26/2010] [Indexed: 05/30/2023]
Abstract
Literature data for anion diffusion in compacted swelling clays contain systematic inconsistencies when the results of through-diffusion tests are compared with those of out-diffusion or tracer profile analysis. In the present work we investigated whether these inconsistencies can be explained by taking into account heterogeneities in the compacted samples; in particular increased porosities at the clay boundaries. Based on the combined results of out-diffusion, tracer profile analysis and the spatial distribution of the electrolyte anion in the clay, we conclude that the inconsistencies can indeed be resolved by taking into account a heterogeneous distribution of the total and the anion-accessible porosity. This, by definition, leads to a position dependence of the effective diffusion coefficient. Neglecting these effects results in a rather subordinate systematic error in the determination of effective diffusion coefficients of anions from through-diffusion tests with clay thicknesses in the centimetre range. However, stronger errors in terms of absolute values and conceptual interpretation may be introduced in out-diffusion tests and profile analyses of the diffused tracer. We recommend that anion diffusion tests should be accompanied by measurements of the total and anion-accessible porosity as a function of position in the direction of diffusion.
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Affiliation(s)
- Martin A Glaus
- Laboratory for Waste Management, Paul Scherrer Institut, CH-5232 Villigen, Switzerland.
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Rotenberg B, Marry V, Malikova N, Turq P. Molecular simulation of aqueous solutions at clay surfaces. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:284114. [PMID: 21399286 DOI: 10.1088/0953-8984/22/28/284114] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report a molecular simulation study of aqueous solutions at montmorillonite clay surfaces. Unlike most previous studies, ours does not focus on the interlayer nanopores, but looks at both kinds of external surfaces of clay particles: basal surfaces along the clay layers, and lateral surfaces through which interlayer and larger interparticle pores are linked. We present results on structural, dynamic and thermodynamic properties and phenomena, including hydration complexes of ions, H bonding networks, modification of the water dynamics with respect to the bulk, and the role of water in the cation exchange between interlayer and interparticle pores.
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Affiliation(s)
- B Rotenberg
- UPMC Université, Paris-06 and CNRS, PECSA, UMR 7195, F-75005, Paris, France.
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A theoretical study of the hydration of Rb+ by Monte Carlo simulations with refined ab initio-based model potentials. Theor Chem Acc 2009. [DOI: 10.1007/s00214-009-0644-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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