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Kim HN, Kim JH, Lee KJ, Kim I, Yoon IH. Enhanced removal of cesium from hydrobiotite using polyacrylonitrile (PAN)-based nickel ferrocyanide beads. JOURNAL OF HAZARDOUS MATERIALS 2023; 452:131360. [PMID: 37031671 DOI: 10.1016/j.jhazmat.2023.131360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/09/2023] [Accepted: 04/02/2023] [Indexed: 06/19/2023]
Abstract
The desorption of cesium (Cs) from contaminated clay minerals remains challenging because of the restricted efficiency of the removal process. Therefore, in the present study, a bead-type adsorbent was added during the conventional acid washing process to improve the removal of Cs+ from a clay mineral. As the Cs+ adsorbent, polyacrylonitrile-based nickel potassium hexacyanoferrate (NiFC-PAN) was used to selectively adsorb Cs+ in a strongly acidic solution containing competing ions. To prevent erosion of the adsorbent under harsh environmental conditions and to facilitate the separation of clay particles, PAN was deliberately constructed as large beads. The synthesized adsorbent (NiFC/PAN in a 2:1 ratio) showed high selectivity for Cs+, with a maximum capacity for Cs+ adsorption of 162.78 mg/g in 0.5 M HNO3 solution. Because the NiFC-PAN demonstrated greater Cs+ selectivity than the clay mineral (hydrobiotite, HBT), the addition of NiFC-PAN during the acid washing significantly increased Cs+ desorption (73.3%) by inhibiting the re-adsorption of Cs+ on the HBT. The radioactivity of 137Cs-HBT was substantially decreased from 209 to 27 Bq/g by the acid treatment in the presence of NiFC-PAN, corresponding to a desorption efficiency of 87.1%. Therefore, these results suggest that the proposed technique is a potentially useful and effective method for decontamination of radioactive clay.
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Affiliation(s)
- Hye-Nim Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeokdae-ro, Yuseong-gu, Daejeon 34057, Republic of Korea; Department of Chemical Engineering and Applied Chemistry, College of Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea
| | - June-Hyun Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeokdae-ro, Yuseong-gu, Daejeon 34057, Republic of Korea
| | - Kyung Jin Lee
- Department of Chemical Engineering and Applied Chemistry, College of Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea
| | - Ilgook Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeokdae-ro, Yuseong-gu, Daejeon 34057, Republic of Korea.
| | - In-Ho Yoon
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeokdae-ro, Yuseong-gu, Daejeon 34057, Republic of Korea.
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Liu H, Tong L, Su M, Chen D, Song G, Zhou Y. The latest research trends in the removal of cesium from radioactive wastewater: A review based on data-driven and visual analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 869:161664. [PMID: 36681337 DOI: 10.1016/j.scitotenv.2023.161664] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/10/2023] [Accepted: 01/13/2023] [Indexed: 06/17/2023]
Abstract
The widespread adoption of nuclear energy has increased the amount of radioactive cesium (Cs) that is discharged into waste streams, which can have environmental risks. In this paper, we provide a comprehensive summary of current advances in aqueous Cs removal by employing a bibliometric analysis. We collected 1580 articles related to aqueous Cs treatment that were published on the Web of Science database between 2012 and 2022. By applying bibliometric analysis combined with network analysis, we revealed the research distribution, knowledge base, research hotspots, and cutting-edge technologies in the field of aqueous Cs removal. Our findings indicate that China, Japan, and South Korea are the most productive countries with respect to Cs removal research. In addition, both historic events and environmental threats might have contributed to research in Asian countries having a higher focus on Cs removal as well as strong international cooperation between Asian countries. A detailed keyword analysis reveals the main knowledge base for aqueous Cs removal and highlights the potential of the adsorption-based method for treating Cs contamination. Furthermore, the results reveal that exploration of functional materials is a popular research topic in the field of Cs removal. Since 2012, novel materials, including Prussian blue, graphene oxide, hydrogel and nanocomposites, have been widely investigated because of their high capacity for Cs removal. On the basis of the detailed information, we report the latest research trends on aqueous Cs removal, and propose future research directions and describe the challenges related to effective Cs treatment. This scientometric review provides insights into current research hotspots and cutting-edge trends in addition to contributing to the development of this crucial research field.
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Affiliation(s)
- Heyao Liu
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Lizhi Tong
- South China Institute of Environmental Sciences, Ministry of Ecology and Environment, 7 West 12 Street, Yuancun, Guangzhou 510655, China
| | - Minhua Su
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China.
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Gang Song
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Ying Zhou
- Center for Water Research, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai 519087, China
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Suzuki M, Eguchi T, Azuma K, Nakao A, Kubo K, Fujimura S, Syaifudin M, Maruyama H, Watanabe T, Shinano T. The ratio of plant 137Cs to exchangeable 137Cs in soil is a crucial factor in explaining the variation in 137Cs transferability from soil to plant. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159208. [PMID: 36208746 DOI: 10.1016/j.scitotenv.2022.159208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/12/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
To mitigate radioactive cesium from soil to plant, increasing and maintaining the exchangeable potassium (ExK) level during growth is widely accepted after Tokyo Electric Company's Fukushima Dai-ichi Nuclear Plant accident in Japan. This is because the antagonistic relationship between soil solution K and 134Cs + 137Cs (RCs) concentrations changes the transfer factor (TF: designated as the ratio of radioactivity of plant organ to soil) of RCs. As the relationship between ExK and TF depends on the soil types, crop species, and other environmental factors, the required amount of ExK should be set to a safe side. Eleven years after the accident, as the activity of 134Cs was almost negligible, 137Cs became the main RCs in most of the agricultural fields in Fukushima Prefecture. We propose a new indicator, the concentration ratio of plant 137Cs to soil exchangeable 137Cs (Ex137Cs), instead of TF, which showed a better correlation with ExK even among soils with different properties (or mineralogy).
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Affiliation(s)
| | - Tetsuya Eguchi
- Agricultural Radiation Research Center, National Agriculture and Food Research Organization, Japan
| | - Kazuki Azuma
- Faculty of Life and Environmental Sciences, Kyoto Prefectural University, Japan
| | - Atsushi Nakao
- Faculty of Life and Environmental Sciences, Kyoto Prefectural University, Japan
| | - Katashi Kubo
- Agricultural Radiation Research Center, National Agriculture and Food Research Organization, Japan
| | - Shigeto Fujimura
- Agricultural Radiation Research Center, National Agriculture and Food Research Organization, Japan
| | | | | | | | - Takuro Shinano
- Graduate School of Agriculture, Hokkaido University, Japan.
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4
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Voegelin A, Wick S, Pfenninger N, Mangold S, Baeyens B, Fernandes MM. Thallium adsorption onto phyllosilicate minerals. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2022; 24:1343-1359. [PMID: 35608286 PMCID: PMC9491347 DOI: 10.1039/d2em00028h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The adsorption of thallium (Tl) onto phyllosilicate minerals plays a critical role in the retention of Tl in soils and sediments and the potential transfer of Tl into plants and groundwater. Especially micaceous minerals are thought to strongly bind monovalent Tl(I), in analogy to their strong binding of Cs. To advance the understanding of Tl(I) adsorption onto phyllosilicate minerals, we studied the adsorption of Tl(I) onto Na- and K-saturated illite and Na-saturated smectite, two muscovites, two vermiculites and a naturally Tl-enriched soil clay mineral fraction. Macroscopic adsorption isotherms were combined with the characterization of the adsorbed Tl by X-ray absorption spectroscopy (XAS). In combination, the results suggest that the adsorption of Tl(I) onto phyllosilicate minerals can be interpreted in terms of three major uptake paths: (i) highest-affinity inner-sphere adsorption of dehydrated Tl+ on a very low number of adsorption sites at the wedge of frayed particle edges of illite and around collapsed zones in vermiculite interlayers through complexation between two siloxane cavities, (ii) intermediate-affinity inner-sphere adsorption of partially dehydrated Tl+ on the planar surfaces of illite and muscovite through complexation onto siloxane cavities, (iii) low-affinity adsorption of hydrated Tl+, especially in the hydrated interlayers of smectite and expanded vermiculite. At the frayed edges of illite particles and in the vermiculite interlayer, Tl uptake can lead to the formation of new wedge sites that enable further adsorption of dehydrated Tl+. On the soil clay fraction, a shift in Tl(I) uptake from frayed edge sites (on illite) to planar sites (on illite and muscovite) was observed with increasing Tl(I) loading. The results from this study show that the adsorption of Tl(I) onto phyllosilicate minerals follows the same trends as reported for Cs and Rb and thus suggests that concepts to describe the retention of (radio)cesium by different types of phyllosilicate minerals in soils, sediments and rocks are also applicable to Tl(I).
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Affiliation(s)
- Andreas Voegelin
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, CH-8600 Duebendorf, Switzerland.
| | - Silvan Wick
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, CH-8600 Duebendorf, Switzerland.
| | - Numa Pfenninger
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, CH-8600 Duebendorf, Switzerland.
| | - Stefan Mangold
- Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Bart Baeyens
- Paul Scherrer Institute, Forschungsstrasse 111, CH-5232 Villigen PSI, Switzerland
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Herr S, Leybros A, Barre Y, Nikitenko S, Pflieger R. Desorption of Cs from vermiculite by ultrasound assisted ion exchange. CHEMOSPHERE 2022; 303:135175. [PMID: 35671818 DOI: 10.1016/j.chemosphere.2022.135175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/13/2022] [Accepted: 05/27/2022] [Indexed: 06/15/2023]
Abstract
Nuclear power plant accidents typically lead to the contamination of large volumes of soils with radioactive cesium. This element is hard to desorb from soil, especially when it is bound to mica minerals, and aggressive and energy-consuming techniques are often required. In this study, we investigated the use of ultrasound with Mg2+ cation exchange for the removal of a133Cs-contaminated vermiculite over a wide range of temperatures (20-200 °C). At room temperature, ultrasound was found to significantly accelerate Cs desorption but only reversibly adsorbed Cs species were removed. Under hydrothermal conditions and ultrasonic irradiation in contrast, the removal efficiency after 1 h was 50% at 100 °C and more than 95% at 200 °C, compared with only 50% without ultrasonication at 200 °C. Cs contamination can therefore be nearly totally removed, even from collapsed vermiculite sites where sorption is considered irreversible. Ultrasound waves and high temperatures both make trapped Cs more accessible by spreading the sheets and improving mass transfer. Acoustic noise spectra show that even at high pressure and temperature, cavitation bubbles form, oscillate and collapse, with the desired physical effects. These results demonstrate the potential of synergistic ultrasound and hydrothermal treatment for soil remediation.
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Affiliation(s)
- Sophie Herr
- ICSM, Univ Montpellier, UMR 5257, CEA, CNRS, ENSCM, Marcoule, France
| | | | - Yves Barre
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, France
| | - Sergueï Nikitenko
- ICSM, Univ Montpellier, UMR 5257, CEA, CNRS, ENSCM, Marcoule, France
| | - Rachel Pflieger
- ICSM, Univ Montpellier, UMR 5257, CEA, CNRS, ENSCM, Marcoule, France.
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6
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Latrille C, Bildstein O. Cs selectivity and adsorption reversibility on Ca-illite and Ca-vermiculite. CHEMOSPHERE 2022; 288:132582. [PMID: 34687680 DOI: 10.1016/j.chemosphere.2021.132582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/12/2021] [Accepted: 10/14/2021] [Indexed: 06/13/2023]
Abstract
For understanding and predicting the Cs behavior in soils and groundwater, Cs adsorption properties of illite and vermiculite were investigated under various pH conditions and Cs concentrations. Cs adsorption and desorption experiments have been conducted with Ca-homoionic illite and Ca-vermiculite in CaCl2 solution with an ionic strength of 0.03 and of 0.06 mol.L-1 respectively, by focusing on cation exchanges between Cs, proton and calcium at thermodynamic equilibrium. Ca-illite displayed more affinity for Cs than Ca-vermiculite. Cs adsorption was non-linear for both clay minerals and a multi-site exchange model approach was adopted to interpret and model adsorption isotherms. Each mineral reactivity was described by their sorption site properties expressed by their exchange capacity and ionic selectivity. High-selective and low-capacity sites were shown to control Cs uptake at concentrations below 10-8-10-7 mol.L-1 for both Ca-illite and Ca-vermiculite. Three high-capacity sites dominated Cs adsorption at higher concentrations. Cs adsorption reversibility was demonstrated for illite at Ca concentrations ranging from 5 10-2 to 10-9 mol.L-1. The partial irreversibility of Cs adsorption onto vermiculite at Cs concentrations greater than 10-5 mol.L-1 was related to interlayer collapse. Reversible adsorption may occur as long as the interlayer space stays open. The irreversible adsorbed fraction was quantified and taken into account in the modeling approach to calculate the selectivity coefficient of each site.
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Affiliation(s)
- Christelle Latrille
- Université Paris-Saclay, CEA, Service d'Etude du Comportement des Radionucléides, 91191, Gif-sur-Yvette, France.
| | - Olivier Bildstein
- CEA-DES-IRESNE-DTN Cadarache, F-13108, Saint-Paul-Lez-Durance, France
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7
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Kim JH, Anwer H, Kim YS, Park JW. Decontamination of radioactive cesium-contaminated soil/concrete with washing and washing supernatant- critical review. CHEMOSPHERE 2021; 280:130419. [PMID: 33940450 DOI: 10.1016/j.chemosphere.2021.130419] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 06/12/2023]
Abstract
We reviewed washing of radioactive Cs-contaminated concrete and soil based on the fate of Cs in concrete and soil, including sorption materials for treatment of supernatant solution. In non-aged cement materials (the calcium silicate hydration (C-S-H) phase), it was possible to decontaminate Cs using ion exchange with monovalent cations, such as NH4+. The clay components in the soil and aggregates were important factors in optimization of the efficiency and mechanism for Cs decontamination with washing solution. The parameters (reagent component, pH, and temperature) of the washing solution should be determined considering soil mineral type (here, weathered biotite (WB) with vermiculite), since monovalent cations such as NH4+ and K+ can inhibit Cs decontamination due to collapse of the hydrated and expanded interlayer regions with cation exchange. In this case, hydrothermal treatment or H2O2 dosing was necessary to expand the collapsed interlayer region for Cs removal by washing with cation exchange or organic acids. Acid and a chelating agent significantly enhanced Cs-release with dissolution of the adsorbent layer containing iron and aluminum oxides. The important characteristics of important and emerging sorption materials for treatment of the radioactive Cs-contaminated supernatant after washing treatment are discussed. Sorbents for treatment of washing supernatant are divided in to two main categories. Clay minerals, metal hexacyanoferrates, and ammonium molybdophosphates are discussed in the inorganic class of materials. Hypercrosslinked polymers, supramolecular sorbents, carbon nanotubes, and graphene oxide are covered in the carbon-based sorbents for Cs removal from water.
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Affiliation(s)
- Jung Hwan Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul, 04763, South Korea
| | - Hassan Anwer
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul, 04763, South Korea
| | - Yong Soo Kim
- Department of Nuclear Engineering, Hanyang University, 222 Wangsimni-ro, Seoul, 04763, South Korea
| | - Jae-Woo Park
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul, 04763, South Korea.
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8
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Zhang W, Liang Y. Effects of hydrothermal treatments on destruction of per- and polyfluoroalkyl substances in sewage sludge. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 285:117276. [PMID: 33964564 DOI: 10.1016/j.envpol.2021.117276] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 06/12/2023]
Abstract
Sewage sludge has become a sink of per- and polyfluoroalkyl substances (PFAS) due to the ineffectiveness of PFAS removal during conventional activated sludge treatment process. In this study, we evaluated the performance of an enhanced method for PFAS extraction from sewage sludge. Significant matrix effect was observed for samples derived from untreated and hydrothermally treated sludge. Extra steps for removing potential interferences were thus needed to reduce these matrix effects and improve the accuracy of PFAS quantification. Hydrothermal treatment at 165 °C for 0.5/2 h and 250 °C for 0.5 h increased the concentration of extractable PFAAs in treated sludge. Increasing the temperature to 300 °C resulted in complete degradation of PFCAs after hydrothermal processing, but still increased the concentrations of PFSAs and PFAA precursors. The concentration increase could be due to the conversion of PFAA precursors to PFAAs and the release of PFAAs from sewage sludge during thermal treatment. Ca(OH)2 addition to hydrothermal treatment completely removed PFAA precursors but significantly increased the extractable PFAAs, except PFHpA and PFHxS, at 165 °C and all PFSAs at 300 °C. This study revealed the difficulties in extracting and quantifying PFAS in sludge and demonstrated the need for further research on finding suitable solutions for complete removal or destruction of PFAS in highly heterogeneous sewage sludge.
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Affiliation(s)
- Weilan Zhang
- Department of Environmental and Sustainable Engineering, University at Albany, State University of New York, 1400 Washington Avenue, Albany, NY, 12222, USA.
| | - Yanna Liang
- Department of Environmental and Sustainable Engineering, University at Albany, State University of New York, 1400 Washington Avenue, Albany, NY, 12222, USA
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9
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Park SM, Kim JG, Kim HB, Kim YH, Baek K. Desorption technologies for remediation of cesium-contaminated soils: a short review. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:3263-3272. [PMID: 32705387 DOI: 10.1007/s10653-020-00667-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
This review summarizes the mechanisms for desorbing and extracting cesium (Cs+) from clay minerals and soil. Most techniques use ion exchange with acids, cations, polymers, and surfactants. Some improve desorption of Cs+ from clay minerals, while surfactants and polymers expand the interlayer. Mixtures of acids/polymers, acids/surfactants, cations/polymers, and cations/surfactants are therefore more effective agents for desorption of Cs+ from clay minerals. Hydrothermal treatment plays a role similar to that of polymers and surfactants in expanding the interlayer of clay minerals. The primary desorption mechanism expands the interlayer and desorbs Cs+, but multiple sequential extractions based on these techniques can more effectively desorb Cs+ from clay minerals and field-contaminated soils. Desorption techniques for Cs+ based on multiple sequential extractions can reportedly achieve an efficiency greater than 90%, and such approaches are likely to be important technologies for remediation of Cs+-contaminated soils and industrial accident sites, as well as the dismantling of nuclear power plants.
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Affiliation(s)
- Sang-Min Park
- Department of Environment and Energy & Soil Environment Research Center, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Jong-Gook Kim
- Department of Environment and Energy & Soil Environment Research Center, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Hye-Bin Kim
- Department of Environment and Energy & Soil Environment Research Center, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Young-Hun Kim
- Department of Environmental Engineering, Andong National University, 1375 Kyungdong-ro, Andong-si, Kyungsangbuk-do, 36729, Republic of Korea
| | - Kitae Baek
- Department of Environment and Energy & Soil Environment Research Center, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea.
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10
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Kwon S, Kim Y, Roh Y. Effective cesium removal from Cs-containing water using chemically activated opaline mudstone mainly composed of opal-cristobalite/tridymite (opal-CT). Sci Rep 2021; 11:15362. [PMID: 34321553 PMCID: PMC8319380 DOI: 10.1038/s41598-021-94832-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 07/14/2021] [Indexed: 12/04/2022] Open
Abstract
Opaline mudstone (OM) composed of opal-CT (SiO2·nH2O) has high potential use as a cesium (Cs) adsorbent, due to its high specific surface area (SSA). The objective of this study was to investigate the Cs adsorption capacity of chemically activated OM and the adsorption mechanism based on its physico-chemical properties. We used acid- and base-activation methods for the surface modification of OM. Both acid- and base- activations highly increased the specific surface area (SSA) of OM, however, the base-activation decreased the zeta potential value more (- 16.67 mV), compared to the effects of acid-activation (- 6.60 mV) or non-activation method (- 6.66 mV). Base-activated OM showed higher Cs adsorption capacity (32.14 mg/g) than the others (acid: 12.22 mg/g, non: 15.47 mg/g). These results indicate that base-activation generates pH-dependent negative charge, which facilitates Cs adsorption via electrostatic attraction. In terms of the dynamic atomic behavior, Cs cation adsorbed on the OM mainly exist in the form of inner-sphere complexes (IS) containing minor amounts of water molecules. Consequently, the OM can be used as an effective Cs adsorbent via base-activation as an economical and simple modification method.
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Affiliation(s)
- Sunki Kwon
- Department of Earth and Environmental Sciences, Chonnam National University, 77, Yongbong-ro, Buk-gu, Gwangju, 61186, Republic of Korea
| | - Yumi Kim
- Department of Earth and Environmental Sciences, Chonnam National University, 77, Yongbong-ro, Buk-gu, Gwangju, 61186, Republic of Korea
| | - Yul Roh
- Department of Earth and Environmental Sciences, Chonnam National University, 77, Yongbong-ro, Buk-gu, Gwangju, 61186, Republic of Korea.
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11
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Effective washing removal of radioactive cesium from soils using adsorbents: a proposed adsorbent-coexistence method. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07878-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Fukuda T, Takahashi R, Hara T, Ohara K, Kato K, Matsumura D, Inaba Y, Nakase M, Takeshita K. Mechanistic study on the removal of Cs from contaminated soil by rapid ion exchange in subcritical water. J NUCL SCI TECHNOL 2020. [DOI: 10.1080/00223131.2020.1830866] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | | | | | - Koji Ohara
- Japan Synchrotron Radiation Research Institute, Hyogo, Japan
| | - Kazuo Kato
- Japan Synchrotron Radiation Research Institute, Hyogo, Japan
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13
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Kim SM, Yoon IH, Kim IG, Park CW, Sihn Y, Kim JH, Park SJ. Cs desorption behavior during hydrothermal treatment of illite with oxalic acid. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:35580-35590. [PMID: 32594435 DOI: 10.1007/s11356-020-09675-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/09/2020] [Indexed: 06/11/2023]
Abstract
The desorption of radioactive cesium (Cs) in soil is influenced by the clay mineral type, adsorption site, and concentration of Cs. In this study, experiments to detect desorption of non-radioactive and radioactive Cs from illite using oxalic acid were performed for 2 days at 70 °C in hydrothermal conditions. The results showed that the 133Cs removal efficiency by oxalic acid and inorganic acid treatment was similar at high concentration (22.86 mmol/kg) of non-radioactive 133Cs. In the radioactive 137Cs experiment, the removal efficiency by oxalic acid was higher than that by inorganic acid at low concentration (0.79 × 10-6 mmol/kg) of radioactive 137Cs. Based on the illite hypothetical frayed edge site (FES) concentration of 0.612 mmol/kg, the results suggested that 137Cs was preferentially adsorbed to FES on illite. The 137Cs at low concentration was difficult to remove because it was irreversible adsorption to FES, while the non-radioactive Cs at high concentration was mainly adsorbed to planar sites, and so was easy to desorb by ion exchange. Based on the results of NMR, FTIR, and XPS analyses, we concluded that the higher efficiency of 137Cs removal at low concentration by oxalic acid treatment than by treatment with inorganic acid was because of chelation effects associated with the complexation of oxalic acid (ligands) and metal ions in irreversible site (FES).
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Affiliation(s)
- Sung-Man Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeokdae-ro, Yuseong-gu, Daejeon, 34057, Republic of Korea
- Department of Chemical Engineering and Applied Chemistry, College of Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - In-Ho Yoon
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeokdae-ro, Yuseong-gu, Daejeon, 34057, Republic of Korea.
| | - Il-Gook Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeokdae-ro, Yuseong-gu, Daejeon, 34057, Republic of Korea
| | - Chan Woo Park
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeokdae-ro, Yuseong-gu, Daejeon, 34057, Republic of Korea
| | - YoungHo Sihn
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeokdae-ro, Yuseong-gu, Daejeon, 34057, Republic of Korea
| | - June-Hyun Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeokdae-ro, Yuseong-gu, Daejeon, 34057, Republic of Korea
| | - So-Jin Park
- Department of Chemical Engineering and Applied Chemistry, College of Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Republic of Korea.
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Yin X, Zhang L, Harigai M, Wang X, Ning S, Nakase M, Koma Y, Inaba Y, Takeshita K. Hydrothermal-treatment desorption of cesium from clay minerals: The roles of organic acids and implications for soil decontamination. WATER RESEARCH 2020; 177:115804. [PMID: 32302807 DOI: 10.1016/j.watres.2020.115804] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 04/03/2020] [Accepted: 04/05/2020] [Indexed: 06/11/2023]
Abstract
The adsorption and desorption of cesium (Cs) on clays of contaminated soil in a rhizosphere zone can be greatly affected by various biogeochemical processes, the timespans of which are usually months to years. Herein, we present several representative scenarios of the binding of Cs on diverse sites of vermiculitized biotite by controlled Cs adsorption to particles of different sizes. We investigated whether and how the fixed Cs in the different scenarios is desorbed by ambient and hydrothermal treatments with several low-molecular-weight organic acids (LMWOAs). The results showed that the sorbed Cs was discriminatively retained in the un-collapsed, partially collapsed, and thoroughly collapsed structures of vermiculites. The desorption of the sorbed Cs by hydrothermal LMWOAs extractions was easily realized in the un-collapsed structure, but was limited or minimal in the partially collapsed and thoroughly collapsed structures. The Cs desorption varied in accord with the LMWOA species applied and increased with the acid concentration, temperature, and number of treating cycles. The analysis of Cs-desorbed specimens confirmed their partial destruction and interlayer expansion, suggesting that the underlying mechanism of Cs removal by LMWOAs involves not only acid dissolution and complexation but also the accelerated weathering of clays within a short time under hydrothermal conditions. Our findings contribute novel insights into the mobility, bioavailability, and fate of Cs in contaminated soils and its removal from these soils for environmental restorations.
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Affiliation(s)
- Xiangbiao Yin
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8550, Japan; Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency, 790-1 Otsuka, Motooka, Tomioka, Fukushima, 979-1195, Japan.
| | - Lijuan Zhang
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Miki Harigai
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Xinpeng Wang
- School of Resources, Environment and Materials, Guangxi University, 100 Daxue East Road, Nanning, 530004, PR China
| | - Shunyan Ning
- School of Resources, Environment and Materials, Guangxi University, 100 Daxue East Road, Nanning, 530004, PR China
| | - Masahiko Nakase
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Yoshikazu Koma
- Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency, 790-1 Otsuka, Motooka, Tomioka, Fukushima, 979-1195, Japan
| | - Yusuke Inaba
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Kenji Takeshita
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
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15
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Kim I, Kim JH, Kim SM, Park CW, Yoon IH, Yang HM, Lee KW. Desorption of cesium from hydrobiotite by hydrogen peroxide with divalent cations. JOURNAL OF HAZARDOUS MATERIALS 2020; 390:121381. [PMID: 31607579 DOI: 10.1016/j.jhazmat.2019.121381] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 09/30/2019] [Accepted: 10/01/2019] [Indexed: 06/10/2023]
Abstract
In this study, hydrogen peroxide (H2O2) was used to enhance the cation-exchange treatment for Cs+ desorption from clay minerals. Among various investigated clay minerals, hydrobiotite (HBT), which has interstratified layers of vermiculite and biotite, exhibited the highest Cs+ sorption capacity and the most favorable H2O2 activation because of its high Fe content. In X-ray diffraction analysis, HBT treated with H2O2 and 0.1 M Mg2+ showed substantial changes in its basal spacing, indicating expansion of the interlayer region induced by treatment of H2O2 and strongly hydrated divalent cations. In addition, more than 80% of the Cs+ was readily desorbed from HBT with 35% H2O2 solution and 0.1 M Mg2+ at room temperature. After three cycles under the same treatment conditions (35% H2O2 solution and 0.1 M Mg2+), approximately 99% removal of radioactive Cs+ was achieved. These results suggested that H2O2 treatment with solvated Mg2+ enhanced Cs+ desorption from HBT by altering the interlayer region through intercalation of hydrated divalent cations in conjunction with the H2O2 decomposition reaction.
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Affiliation(s)
- Ilgook Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeokdaero, Yuseong-gu, Daejeon, 305-353, Republic of Korea.
| | - June-Hyun Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeokdaero, Yuseong-gu, Daejeon, 305-353, Republic of Korea
| | - Sung-Man Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeokdaero, Yuseong-gu, Daejeon, 305-353, Republic of Korea
| | - Chan Woo Park
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeokdaero, Yuseong-gu, Daejeon, 305-353, Republic of Korea
| | - In-Ho Yoon
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeokdaero, Yuseong-gu, Daejeon, 305-353, Republic of Korea
| | - Hee-Man Yang
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeokdaero, Yuseong-gu, Daejeon, 305-353, Republic of Korea
| | - Kune-Woo Lee
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeokdaero, Yuseong-gu, Daejeon, 305-353, Republic of Korea
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16
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Sasaki T, Yamashita A, Terui N, Hattori T, Tanaka S. Evaluation of Removal Behavior of Cesium in Contaminated Soil Based on Speciation Analysis. ANAL SCI 2020; 36:589-594. [PMID: 32389935 DOI: 10.2116/analsci.19sbp12] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The removal efficiency of Cs from contaminated soil depends on its chemical species bound with the soil components. Therefore, in this study, we observed the elution behavior of Cs based on speciation analysis in a Cs removal experiment conducted on contaminated soils. The treatment method was optimized using simulated contaminated soil and applied to actual contaminated soil on a large scale as well. The elution rate of Cs was approximately 50% or more in both actual and simulated contaminated soil using the optimized treatment method. From the obtained results, a robust treatment method using an eluting reagent and a magnetic adsorbent with low energy costs is proposed. Additionally, the usefulness of speciation analysis in decontamination studies was confirmed.
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Affiliation(s)
- Takahiro Sasaki
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido.,Graduate School of Engineering, Muroran Institute of Technology.,Graduate School of Environmental Earth Science, Hokkaido University
| | - Ayano Yamashita
- Graduate School of Environmental Earth Science, Hokkaido University
| | - Norifumi Terui
- Department of Chemical Engineering, National Institute of Technology, Ichinoseki College
| | - Toshiaki Hattori
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology
| | - Shunitz Tanaka
- Graduate School of Environmental Earth Science, Hokkaido University
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17
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Yin X, Zhang L, Meng C, Inaba Y, Wang X, Nitta A, Koma Y, Takeshita K. Selective removal of radiocesium from micaceous clay for post-accident soil decontamination by temperature-controlled Mg-leaching in a column. JOURNAL OF HAZARDOUS MATERIALS 2020; 387:121677. [PMID: 31784126 DOI: 10.1016/j.jhazmat.2019.121677] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/07/2019] [Accepted: 11/11/2019] [Indexed: 06/10/2023]
Abstract
The effective and efficient removal of radioactive Cs from contaminated soil is highly urgent for the nuclear post-accident remediation. In present study, we achieved rapid Cs desorption from both a typical micaceous clay (i.e., vermiculitized biotite, VB) and actually contaminated soil by high-speed ion exchange through temperature-controlled continuous leaching with Mg-solutions in a column reactor. Cs-sorbed VB was firstly employed as a soil surrogate to explore the macro-Cs desorption process and micro-mechanism in detail. Results showed that VB sandwiched the adsorbed Cs to its interlayers within collapsed structure (10.7 Å) and prevent Cs release even by abundant extraction with H2O at 250 °C or Mg2+ at 25 °C. However, Mg2+-extracted Cs desorption boosted significantly with elevating temperatures and 100 % of sorbed-Cs was removed from Cs-VB leached above 150 °C. Further structural and composition analysis of the leached specimen ensured that solvated Mg2+ preferentially entered into Cs+-collapsed interlayers at 150 °C than K+-interlayers above 200 °C, leading to prior complete Cs removal over K from VB at lower temperatures. By contrast, the Cs-contaminated soil reduced by ∼39 % but ∼82 % of its initial radioactivity after equally leaching with same volumes of Mg2+-solution at 150 and 200 °C, respectively. These temperature-controlled Cs desorption validated that radioactive Cs in actual soil indeed be tightly trapped by micaceous clays nearly in the Cs-K co-collapsed interlayers, to which its extraction by other cations can conditionally occur above enough high leaching temperatures. These superior features would inspire new insights for the design of novel practical technologies for treatment and decontamination of the nuclear post-accident soils.
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Affiliation(s)
- Xiangbiao Yin
- Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency, 790-1 Otsuka, Motooka, Tomioka, Fukushima 979-1195, Japan; Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
| | - Lijuan Zhang
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
| | - Chenrui Meng
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
| | - Yusuke Inaba
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
| | - Xinpeng Wang
- College of Resources and Metallurgy, Guangxi University, 100 Daxue East Road, Nanning 530004, PR China.
| | - Ayako Nitta
- Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency, 790-1 Otsuka, Motooka, Tomioka, Fukushima 979-1195, Japan.
| | - Yoshikazu Koma
- Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency, 790-1 Otsuka, Motooka, Tomioka, Fukushima 979-1195, Japan.
| | - Kenji Takeshita
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
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18
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Kim JH, Kim SM, Yoon IH, Choi SJ, Kim I. Selective separation of Cs-contaminated clay from soil using polyethylenimine-coated magnetic nanoparticles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 706:136020. [PMID: 31841848 DOI: 10.1016/j.scitotenv.2019.136020] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 10/25/2019] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
We evaluated the feasibility of using magnetic nanoparticles (MNPs) coated with polyethylenimine (PEI), a cationic polymer, to remediate radioactive contaminated soil by separating Cs-contaminated clay from the soil. The influences of the solution pH, PEI-to-MNPs mass ratio, and the PEI-MNPs dose on the magnetic separation performance were systematically examined. The highest SE% of illite from solution through electrostatic attraction was approximately 100% at a mass ratio of 0.04 g-PEI-MNPs/g-clay. The PEI coating clearly enhanced the adhesion between MNPs and clay minerals by increasing the quantity of functional amine groups available for adsorbing negatively charged clay minerals. In separation experiments using a soil mixture, the PEI-coated MNPs selectively separated clay- and silt-sized fine particles smaller than 0.038 mm even in the presence of a large amount of sand when used at a low dose (mass ratio of 0.05 g-PEI-MNPs/g-clay) and without pH control. We also used the PEI-MNPs to separate 137Cs-contaminated illite from soil under an external magnetic field. After magnetic separation, the highest removal efficiency achieved for 137Cs removal from the treated soil was 81.7% at a low nanoparticle dosage, which resulted in satisfying the reduction of radioactivity and waste volume. The results clearly demonstrate that the selective separation of Cs-contaminated clay using PEI-coated MNPs is a promising technique for remediating radioactive soil.
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Affiliation(s)
- June-Hyun Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 111, Daedeok-daero 989beon-gil, Yuseong-gu, Daejeon, Republic of Korea; School of Architectural, Civil, Environmental, and Energy Engineering, KyungPook National University, 80 Daehak-ro, Sangyeok-dong, Buk-gu, Daegu, Republic of Korea
| | - Sung-Man Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 111, Daedeok-daero 989beon-gil, Yuseong-gu, Daejeon, Republic of Korea
| | - In-Ho Yoon
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 111, Daedeok-daero 989beon-gil, Yuseong-gu, Daejeon, Republic of Korea
| | - Sang-June Choi
- School of Architectural, Civil, Environmental, and Energy Engineering, KyungPook National University, 80 Daehak-ro, Sangyeok-dong, Buk-gu, Daegu, Republic of Korea
| | - Ilgook Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 111, Daedeok-daero 989beon-gil, Yuseong-gu, Daejeon, Republic of Korea.
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19
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Huang Y, Wang R. Highly Effective and Low-Cost Ion-Imprinted Polymers Loaded on Pretreated Vermiculite for Lithium Recovery. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01244] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yan Huang
- School of Environmental Science and Engineering, Shandong University, No. 72 Seaside Road, Jimo, Qingdao 266237, P. R. China
| | - Rui Wang
- School of Environmental Science and Engineering, Shandong University, No. 72 Seaside Road, Jimo, Qingdao 266237, P. R. China
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20
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Park SM, Yang JS, Tsang DCW, Alessi DS, Baek K. Enhanced irreversible fixation of cesium by wetting and drying cycles in soil. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2019; 41:149-157. [PMID: 30143907 DOI: 10.1007/s10653-018-0174-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 08/15/2018] [Indexed: 06/08/2023]
Abstract
The retention of radioactive cesium (Cs) in soil is significantly related to the types of clay minerals, while the weathering process affects the irreversible adsorption sites in clay minerals. In this study, the effect of weathering (exposure duration of Cs and repeated wetting and drying cycles) on fractionation of Cs in soils was investigated using fractionation analysis by the sequential extraction. The residual fraction of Cs increased slowly with exposure time but increased rapidly by repeated wetting and drying cycles. XRD analysis shows that a 1.43 nm of interlayer size for vermiculite is shortened to 1.00 nm, i.e., similar to that of illite. The change implies the potential that the structure of expandable clay minerals is transformed to the non-expandable structure by weathering process after Cs retention. Based on the result, the residual fraction of Cs, most stable form of Cs in the soil, reached relatively rapidly to a maximum. However, the process is much slower kinetically in the field because the bench-scale weathering process used in this study is more aggressive. This study implies that Cs fractionations in the soil are converted into a more stable fraction by weathering processes in the soil. Therefore, Cs removal should be conducted as soon as possible after accidental release of Cs in an environmental side.
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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-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Jung-Seok Yang
- Systems Biotechnology Research Center, KIST Gangneung Institute of Natural Products, 679 Saimdang-ro, Gangneung-si, Gangwon-do, 25451, Republic of Korea
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - 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-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea.
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21
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Wang K, Ma H, Pu S, Yan C, Wang M, Yu J, Wang X, Chu W, Zinchenko A. Hybrid porous magnetic bentonite-chitosan beads for selective removal of radioactive cesium in water. JOURNAL OF HAZARDOUS MATERIALS 2019; 362:160-169. [PMID: 30236936 DOI: 10.1016/j.jhazmat.2018.08.067] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 08/19/2018] [Accepted: 08/20/2018] [Indexed: 05/27/2023]
Abstract
Easy-to-obtain magnetic bentonite-chitosan hybrid beads (Bn-CTS) were prepared by immobilizing bentonite within a porous structure of chitosan beads to achieve a hybrid adsorption effect for the removal of cesium ion (Cs+) from water. The hybrid adsorbent, which had a porous structure and abundant binding sites contributed by both chitosan and bentonite, ensured superb adsorption characteristics. The paramagnetic character of the beads enabled their facile separation for recycling. The chitosan/bentonite ratio, pH and contact time were optimized to achieve the optimal Cs+ efficiency, and the adsorption kinetics and isotherms were thoroughly discussed. The adsorption kinetics obeyed the pseudo-second-order model, and the best fitted equation for equilibrium data was the Langmuir isotherm model. The maximum adsorption capacity of the bentonite-chitosan beads was 57.1 mg g-1. The adsorbent had excellent selectivity towards Cs+ adsorption in the presence of abundant cations (Li+, Na+, K+ and Mg2+). The adsorbent was able to be recycled by treating the beads with 0.1 mol L-1 of MgCl2 to quantitatively desorb Cs+ from the beads. Overall, the magnetic bentonite-chitosan beads can be used as a highly efficient adsorbent for radioactive waste disposal and management.
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Affiliation(s)
- Kexin Wang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Hui Ma
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China; Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej, 401871 Frederiksberg, Denmark
| | - Shengyan Pu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China; Department of Civil and Environment Engineering, The Hong Kong Polytechnic University, Hong Kong, PR China.
| | - Chun Yan
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Miaoting Wang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Jing Yu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Xiaoke Wang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Wei Chu
- Department of Civil and Environment Engineering, The Hong Kong Polytechnic University, Hong Kong, PR China
| | - Anatoly Zinchenko
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China; Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Japan.
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22
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Alginate impregnated ferric hexacyanoferrate(II) for effective decontamination of cesium from aquatic environment. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-6051-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Kim JM, Lee MH, Ko JA, Kang DH, Bae H, Park HJ. Influence of Food with High Moisture Content on Oxygen Barrier Property of Polyvinyl Alcohol (PVA)/Vermiculite Nanocomposite Coated Multilayer Packaging Film. J Food Sci 2018; 83:349-357. [PMID: 29369361 DOI: 10.1111/1750-3841.14012] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
This study investigates the potential complications in applying nanoclay-based waterborne coating to packaging films for food with high moisture content. Multilayer packaging films were prepared by dry laminating commercially available polyvinyl alcohol (PVA)/vermiculite nanocomposite coating films and linear low-density polyethylene film, and the changes in oxygen barrier properties were investigated according to different relative humidity using 3 types of food simulants. When the relative humidity was above 60%, the oxygen permeability increased sharply, but this was reversible. Deionized water and 3% acetic acid did not cause any large structural change in the PVA/vermiculite nanocomposite but caused a reversible deterioration of the oxygen barrier properties. In contrast, 50% ethanol, a simulant for the semifatty food, induced irreversible structural changes with deterioration of the oxygen barrier property. These changes are due to the characteristics of PVA rather than vermiculite. PRACTICAL APPLICATION We believe this manuscript would be of interest to the wide group of researchers, organizations, and companies in the field of developing nanoclay-based gas barrier packaging for foods with high moisture content. Hence, we wish to diffuse our knowledge to the scientific community.
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Affiliation(s)
- Jung Min Kim
- School of Life Sciences and Biotechnology, Korea Univ., 5-Ka, Anam-Dong, Sungbuk-Ku, Seoul 136-701, Republic of Korea
| | - Min Hyeock Lee
- School of Life Sciences and Biotechnology, Korea Univ., 5-Ka, Anam-Dong, Sungbuk-Ku, Seoul 136-701, Republic of Korea
| | - Jung A Ko
- School of Life Sciences and Biotechnology, Korea Univ., 5-Ka, Anam-Dong, Sungbuk-Ku, Seoul 136-701, Republic of Korea
| | - Dong Ho Kang
- Korea Packaging Center, Korea Inst. of Industrial Technology, Bucheon, Republic of Korea
| | - Hojae Bae
- Dept. of Stem Cell and Regenerative Biotechnology, KU Convergence Science and Technology Inst., Konkuk Univ., Hwayang-dong, Kwangjin-gu, Seoul 05029, Republic of Korea
| | - Hyun Jin Park
- School of Life Sciences and Biotechnology, Korea Univ., 5-Ka, Anam-Dong, Sungbuk-Ku, Seoul 136-701, Republic of Korea
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25
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Yin X, Wang X, Wu H, Takahashi H, Inaba Y, Ohnuki T, Takeshita K. Effects of NH 4+, K +, Mg 2+, and Ca 2+ on the Cesium Adsorption/Desorption in Binding Sites of Vermiculitized Biotite. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:13886-13894. [PMID: 29135229 DOI: 10.1021/acs.est.7b04922] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The reversibility of cesium adsorption in contaminated soil is largely dependent on its interaction with micaceous minerals, which may be greatly influenced by various cations. Herein, we systematically investigated the effects of NH4+, K+, Mg2+, and Ca2+ on the adsorption/desorption of Cs+ into different binding sites of vermiculitized biotite (VB). Original VB was initially saturated by NH4+, K+, or Mg2+; we then evaluated the adsorption of Cs+ on three treated VBs, and the desorption by extraction with NH4+, K+, Mg2+, or Ca2+ was further evaluated. Our structural analysis and Cs+ extractability determinations showed that NH4+ and K+ both collapsed the interlayers of VB, resulting in the dominant adsorption of Cs+ to external surface sites on which Cs+ was readily extracted by NH4+, K+, Mg2+, or Ca2+ irrespective of their species, whereas Mg2+ maintained the VB with expanded interlayers, leading to the overwhelming adsorption of Cs+ in collapsed interlayer sites on which the Cs+ desorption was difficult and varied significantly by the cations used in extraction. The order of Cs+ extraction ability from the collapsed interlayers was K+ ≫ Mg2+ ≈ Ca2+ ≫ NH4+. These results could provide important insights into Cs migration in soil and its decontamination for soil remediation.
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Affiliation(s)
- Xiangbiao Yin
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology , 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Xinpeng Wang
- College of Resources and Metallurgy, Guangxi University , 100 Daxue East Road, Nanning 530004, People's Republic of China
| | - Hao Wu
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology , 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Hideharu Takahashi
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology , 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Yusuke Inaba
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology , 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Toshihiko Ohnuki
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology , 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Kenji Takeshita
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology , 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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Yin X, Zhang L, Ochiai A, Utsunomiya S, Takahashi H, Ohnuki T, Takeshita K. Effect of Temperature on K+ and Mg2+ Extracted Desorption of Cs from Vermiculitized Biotite. CHEM LETT 2017. [DOI: 10.1246/cl.170551] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiangbiao Yin
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550
| | - Lijuan Zhang
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550
| | - Asumi Ochiai
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395
| | - Satoshi Utsunomiya
- Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395
| | - Hideharu Takahashi
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550
| | - Toshihiko Ohnuki
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550
| | - Kenji Takeshita
- Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550
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Mazloomi F, Jalali M. Adsorption of ammonium from simulated wastewater by montmorillonite nanoclay and natural vermiculite: experimental study and simulation. ENVIRONMENTAL MONITORING AND ASSESSMENT 2017; 189:415. [PMID: 28744669 DOI: 10.1007/s10661-017-6080-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 06/20/2017] [Indexed: 05/12/2023]
Abstract
In this research, montmorillonite nanoclay (MNC) and vermiculite were used to adsorb ammonium (NH4+) from simulated wastewater. The effect of organic acids, cations, and anions on adsorption of NH4+ was also studied using batch experiments. The presence of organic acids significantly decreased the NH4+ adsorption using both adsorbents and the reduction followed the order of citric acid > malic acid > oxalic acid. The presence of cations in wastewater could decrease the adsorption of NH4+ and the ion exchange selectivity on the MNC and vermiculite followed the orders Mg > Ca ≥ K > Na and Mg > > Ca > Na > K, respectively. Adsorption of NH4+ by adsorbents in the presence of sulfate (SO4) was higher than those in the presence of phosphate (PO4) and chloride (Cl) anions. Results indicated that MNC and vermiculite had good potential for NH4+ removal depending on adsorbent dosage, pH, contact time, and initial NH4+ concentration. The effect of pH on removal of NH4+ indicated that MNC would be more appropriate as the adsorbent than vermiculite at low pH values. Kinetic analysis demonstrated that the rate-controlling step adsorption for NH4+ by MNC and vermiculite was heterogeneous chemisorption and followed the pseudo-second-order model. The desorption experiments indicated that the adsorption of NH4+ by adsorbents was not fully reversible, and the total recovery of adsorbed NH4+ for MNC and vermiculite varied in the range of 72 to 94.6% and 11.5 to 45.7%, respectively. Cation exchange model (CEM) in PHREEQC program was used to simulate NH4+ adsorption. Agreement between measured and simulated data suggested that CEM was favored in simulating adsorption of NH4+ by clay minerals. The results indicated that MNC and vermiculite have good performance as economic and nature-friendly adsorbents that can ameliorate the water and environment quality.
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Affiliation(s)
- Farhad Mazloomi
- Department of Soil Science, College of Agriculture, Bu-Ali Sina University, Hamadan, Iran.
| | - Mohsen Jalali
- Department of Soil Science, College of Agriculture, Bu-Ali Sina University, Hamadan, Iran
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Honda M, Okamoto Y, Shimoyama I, Shiwaku H, Suzuki S, Yaita T. Mechanism of Cs Removal from Fukushima Weathered Biotite by Heat Treatment with a NaCl-CaCl 2 Mixed Salt. ACS OMEGA 2017; 2:721-727. [PMID: 31457466 PMCID: PMC6641079 DOI: 10.1021/acsomega.6b00372] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 01/19/2017] [Indexed: 05/31/2023]
Abstract
An in situ extended X-ray absorption fine structure (in situ EXAFS) spectroscopic analysis at high temperature was conducted to investigate the mechanism of Cs removal from weathered biotite (WB) from Fukushima, induced by heating with a mixed salt of NaCl and CaCl2. This indicated that most Cs remained in WB during heating at 200-700 °C. In addition, the in situ EXAFS spectra gradually changed on heating with the mixed salt and a completely different spectrum was observed for the sample after cooling from 700 °C to room temperature (RT). Ex situ EXAFS measurements and X-ray fluorescence analyses were also conducted on samples after heat treatment and removal of the mixed salt to clarify the temperature dependence of the Cs removal ratio. On the basis of the results of radial structure function analysis obtained from in situ EXAFS, we concluded that almost all of the Cs was removed from WB by heating at 700 °C with the mixed salt, and that Cs formed Cs-Cl bonds after cooling to RT from 700 °C. In contrast, although more than half of the Cs present was removed from WB by heat treatment at 500 °C, most Cs was surrounded by silica tetrahedrons, maintained by Cs-O bonds. On the basis of these results, different Cs removal processes are suggested for the high-temperature (600-700 °C) and low-temperature (400-500 °C) regions.
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Affiliation(s)
- Mitsunori Honda
- Materials
Sciences Research Center (MSRC), Japan Atomic
Energy Agency (JAEA), 2-4, Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - Yoshihiro Okamoto
- Materials
Sciences Research Center (MSRC), Japan Atomic
Energy Agency (JAEA), 2-4, Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - Iwao Shimoyama
- Materials
Sciences Research Center (MSRC), Japan Atomic
Energy Agency (JAEA), 2-4, Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - Hideaki Shiwaku
- Materials
Sciences Research Center (MSRC), Japan Atomic
Energy Agency (JAEA), 2-4, Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - Shinichi Suzuki
- Materials
Sciences Research Center (MSRC), Japan Atomic
Energy Agency (JAEA), 2-4, Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
- Fukushima
Environmental Safety Center, Japan Atomic
Energy Agency (JAEA), 6-6 Sakae-machi, Fukushima-shi, Fukushima 960-8031, Japan
| | - Tsuyoshi Yaita
- Materials
Sciences Research Center (MSRC), Japan Atomic
Energy Agency (JAEA), 2-4, Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
- Fukushima
Environmental Safety Center, Japan Atomic
Energy Agency (JAEA), 6-6 Sakae-machi, Fukushima-shi, Fukushima 960-8031, Japan
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