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Na S, Jeong H, Kim I, Hong SM, Shim J, Yoon IH, Cho KH. Distribution coefficient prediction using multimodal machine learning based on soil adsorption factors, XRF, and XRD spectrum data. JOURNAL OF HAZARDOUS MATERIALS 2024; 478:135285. [PMID: 39121738 DOI: 10.1016/j.jhazmat.2024.135285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 07/08/2024] [Accepted: 07/20/2024] [Indexed: 08/12/2024]
Abstract
The distribution coefficient (Kd) plays a crucial role in predicting the migration behavior of radionuclides in the soil environment. However, Kd depends on the complexities of geological and environmental factors, and existing models often do not reflect the unique soil properties. We propose a multimodal technique to predict Kd values for radionuclide adsorption in soils surrounding nuclear facilities in Republic of Korea. We integrated and trained three sub-networks reflecting different data domains: soil adsorption factors for physicochemical conditions, X-ray fluorescence (XRF) data, and X-ray diffraction (XRD) spectra for inherent soil properties. Our multimodal model achieved high performance, with a coefficient of determination (R2) of 0.84 and root mean squared error (RMSE) of 0.89 for natural log-transformed Kd. This is the first study to develop a multimodal model that simultaneously incorporates inherent soil properties and adsorption factors to predict Kd. We investigated influential peaks in XRD spectra and also revealed that pH and calcium oxide (CaO) were significant variables in soil adsorption factors and XRF data, respectively. These results promote the use of a multimodal model to predict Kd values by integrating data from different domains, providing a cost-effective and novel approach to elucidate the mechanisms of radionuclide adsorption in soil.
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Affiliation(s)
- Seongyeon Na
- Department of Civil, Urban, Earth and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Heewon Jeong
- Future and Fusion Lab of Architectural, Civil and Environmental Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Ilgook Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
| | - Seok Min Hong
- Department of Civil, Urban, Earth and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jaegyu Shim
- Department of Civil, Urban, Earth and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - In-Ho Yoon
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea.
| | - Kyung Hwa Cho
- School of Civil, Environmental, and Architectural Engineering, Korea University, Seoul 02841, Republic of Korea.
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Wan H, Liu D, Shao L, Sheng Z, Liu N, Wu Z, Luo W, Zhan P, Zhang L. Simple and scalable preparation of lignin based porous carbon coated nano-clay composites and their efficient removal for the diversified iodine. Int J Biol Macromol 2024; 270:132091. [PMID: 38718990 DOI: 10.1016/j.ijbiomac.2024.132091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 03/14/2024] [Accepted: 05/02/2024] [Indexed: 05/20/2024]
Abstract
Here, lignin and nano-clay were used to prepare novel composite adsorbents by one-step carbonization without adding activators for radioactive iodine capture. Specially, 1D nano-clay such as halloysite (Hal), palygorskite (Pal) and sepiolite (Sep) were selected as skeleton components, respectively, enzymatic hydrolysis lignin (EHL) as carbon source, lignin based porous carbon/nano-clay composites (ELC-X) were prepared through ultrasonic impregnation, freeze drying, and carbonization. Characterization results indicated lignin based porous carbon (ELC) well coated on the surface of nano-clay, and made its surface areas increase to 252 m2/g. These composites appeared the micro-mesoporous hierarchical structure, considerable N doping and good chemical stability. Results of adsorption experiments showed that the introduction of ELC could well promote iodine vapor uptake of nano-clay, and up to 435.0 mg/g. Meanwhile, the synergistic effect between lignin based carbon and nano-clay was very significant for the adsorption of iodine/n-hexane and iodine ions, their capacity were far exceed those of a single material, respectively. The relevant adsorption kinetic and thermodynamics, and mechanism of ELC-X composites were clarified. This work provided a class of low-cost and environmentally friendly adsorbents for radioactive iodine capture, and opened up ideas for the comprehensive utilization of waste lignin and natural clay minerals.
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Affiliation(s)
- Huan'ai Wan
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Dandan Liu
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Lishu Shao
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Zhiyuan Sheng
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Na Liu
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha 410004, China
| | - Zhiping Wu
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha 410004, China
| | - Weihua Luo
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha 410004, China
| | - Peng Zhan
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha 410004, China
| | - Lin Zhang
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha 410004, China
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Li X, Tan K, Liu L, Li Y, Meng S, Li X, Li C, Wang X, Tian Y. Dynamics of radionuclide electromigration in intact granite: An kinetic adsorption-advection-dispersion model and its application. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 937:173534. [PMID: 38802020 DOI: 10.1016/j.scitotenv.2024.173534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/04/2024] [Accepted: 05/24/2024] [Indexed: 05/29/2024]
Abstract
Granite, as the natural barrier for the disposal of high-level radioactive waste, plays an important role in ensuring environmental and public safety. The safety assessment of the repository depends on the reliable migration parameters of radionuclides in granite. In this study, we developed a kinetic adsorption-advection-dispersion model based on first-order adsorption kinetics. It introduces a first-order adsorption rate coefficient to describe the kinetics of adsorption process and accounts for other crucial mechanisms affecting the migration of radionuclide ions, namely, the electromigration, electroosmosis, and dispersion. This model is then applied to interpret the experimental results of electromigration of tracer ions in intact granite. The results show that for the weakly adsorbed radionuclides studied, iodide and selenite, the effective diffusion coefficients and formation factors calculated by this model are in constant with those derived from the classical advection-dispersion model based on linear adsorption equilibrium. By contrast, for the moderately or strongly adsorbed tracer ions studied, including cobalt, cesium, and strontium, the migration parameters calculated by this model exhibit significantly less uncertainty than those obtained from the advection-dispersion model simulations. The advection-dispersion model based on the first order adsorption kinetics introduces the first order adsorption rate coefficient, and considers the influence of electromigration, electroosmosis and dispersion mechanism, which helps to explain the migration mechanism of nuclide ions in intact granite more accurately.
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Affiliation(s)
- Xiaojie Li
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
| | - Kaixuan Tan
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China.
| | - Longcheng Liu
- R&D and Modelling Center for Treatment and Disposal of Radioactive Waste, University of South China, Hengyang 421001, China; School of Nuclear Science and Technology, University of South China, Hengyang 421001, China.
| | - Yongmei Li
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China; R&D and Modelling Center for Treatment and Disposal of Radioactive Waste, University of South China, Hengyang 421001, China
| | - Shuo Meng
- R&D and Modelling Center for Treatment and Disposal of Radioactive Waste, University of South China, Hengyang 421001, China; School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
| | - Xiaodong Li
- Department of Chemistry-Radiochemistry, University of Helsinki, 00014 Helsinki, Finland
| | - Chunguang Li
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China; R&D and Modelling Center for Treatment and Disposal of Radioactive Waste, University of South China, Hengyang 421001, China
| | - Xinyu Wang
- School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
| | - Yunting Tian
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
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Yoon IH, Lee SH, Kim I, Kim SM. A comparative study on the Cs adsorption/desorption and structural changes in different clay minerals. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:25342-25355. [PMID: 38472574 DOI: 10.1007/s11356-024-32826-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 03/04/2024] [Indexed: 03/14/2024]
Abstract
We investigated the structural changes in clay minerals after Cs adsorption and understood their low desorption efficiency using an ion-exchanger. We focused on the role of interlayers in Cs adsorption and desorption in 2:1 clay minerals, namely illite, hydrobiotite, and montmorillonite, using batch experiments and XRD and EXAFS analyses. The adsorption characteristics of the clay minerals were analyzed using cation exchange capacity (CEC), maximum adsorption isotherms (Qmax), and radiocesium interception potential (RIP) experiments. Although illite showed a low CEC value, it exhibited high selectivity for Cs with a relatively high RIP/CEC ratio. The Cs desorption efficiency after treatment with a NaCl ion exchanger was the highest for illite (74.3%), followed by hydrobiotite (45.5%) and montmorillonite (30.3%); thus, Cs adsorbed onto planar sites, rather than on interlayers or frayed edge sites (FESs), is easily desorbed. After NaCl treatment, XRD analysis showed that the low desorption efficiency was due to the collapse of the interlayer-fixed Cs, which tightly narrowed the interlayers' hydrobiotite due to the ion exchange of divalent cations (Mg2+ or Ca2+) into the monovalent cation (Na+). Moreover, EXAFS analysis showed that hydrobiotite formed inner-sphere structures after NaCl desorption, indicating that it was difficult to remove Cs from NaCl desorption due to the collapsed hydrobiotite and montmorillonite interlayers as well as the strong bonding in FESs of illite. In contrast, chelation desorption using oxalic acid effectively dissolved the narrowed interlayers of hydrobiotite (98%) and montmorillonite (85.26%), enhancing the desorption efficiency. Therefore, low desorption efficiency for Cs clays using an ion exchanger was caused by the collapsed interlayer due to the exchange between monovalent cation and divalent cation.
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Affiliation(s)
- In-Ho Yoon
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeok-Daero, Yuseong-Gu, Daejeon, 34057, Republic of Korea.
| | - Sang-Ho Lee
- Disposal Performance Demonstration Research Division, Korea Atomic Energy Research Institute, Daedeok-Daero 989-111, Yuseong-Gu, Daejeon, 305-353, Republic of Korea
| | - Ilgook Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeok-Daero, Yuseong-Gu, Daejeon, 34057, Republic of Korea
| | - Sung Man Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111, Daedeok-Daero, Yuseong-Gu, Daejeon, 34057, Republic of Korea
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Sekudewicz I, Syczewski M, Rohovec J, Matoušková Š, Kowalewska U, Blukis R, Geibert W, Stimac I, Gąsiorowski M. Geochemical behavior of heavy metals and radionuclides in a pit lake affected by acid mine drainage (AMD) in the Muskau Arch (Poland). THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168245. [PMID: 37918728 DOI: 10.1016/j.scitotenv.2023.168245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 10/03/2023] [Accepted: 10/29/2023] [Indexed: 11/04/2023]
Abstract
Pit lakes in the 'anthropogenic lake district' in the Muskau Arch (western Poland; central Europe) are strongly affected by acid mine drainage (AMD). The studied acidic pit lake, ŁK-61 (pH <3), is also exposed to floods due to its location in the flood hazard area, which may significantly influence the geochemical behavior of elements. The elemental compositions of water and lake sediment samples were measured with ICP-OES and ICP-MS. The sediment profile was also examined for 137Cs and 210Po activity concentrations using gamma and alpha spectrometry, respectively. Grain size distribution, mineralogical composition, diatoms, and organic matter content in the collected core were also determined. The key factors responsible for the distribution of selected heavy metals (e.g., Cu, Ni, Pb, Zn) and radioisotopes (137Cs and 210Po) in the bottom sediments of Lake ŁK-61 are their coprecipitation/precipitation with Fe and Al secondary minerals and their sorption onto authigenic and allogenic phases. These processes are likely driven by the lake tributary, which is an important source of dissolved elements. The data also showed that the physiochemical parameters of Lake ŁK-61 water changed during an episodic depositional event, i.e., the flood of the Nysa Łużycka River in the summer of 2010. The flood caused an increase in the water pH, as interpreted from the subfossil diatom studies. The down-core profiles of the studied heavy metal and radionuclide (HMRs) contents were probably affected by this depositional event, which prevented a detailed age determination of the collected lake sediments with 137Cs and 210Pb dating methods. Geochemical modeling indicates that the flood-related shift in the physicochemical parameters of the lake water could have caused the scavenging of dissolved elements by the precipitation of fresh secondary minerals. Moreover, particles contaminated with HMRs have also possibly been delivered by the river, along with the nutrients (e.g., phosphorus and nitrogen).
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Affiliation(s)
- Ilona Sekudewicz
- Institute of Geological Sciences, Polish Academy of Sciences, 00818 Warszawa, Twarda 51/55, Poland.
| | - Marcin Syczewski
- Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany
| | - Jan Rohovec
- Institute of Geology, Czech Academy of Sciences, 16500 Praha, Rozvojová 269, Czech Republic
| | - Šárka Matoušková
- Institute of Geology, Czech Academy of Sciences, 16500 Praha, Rozvojová 269, Czech Republic
| | - Urszula Kowalewska
- Institute of Geological Sciences, Polish Academy of Sciences, 00818 Warszawa, Twarda 51/55, Poland
| | - Roberts Blukis
- Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany; Leibniz-Institut für Kristallzüchtung, Max-Born-Str. 2, 12489 Berlin, Germany
| | - Walter Geibert
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany
| | - Ingrid Stimac
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany
| | - Michał Gąsiorowski
- Institute of Geological Sciences, Polish Academy of Sciences, 00818 Warszawa, Twarda 51/55, Poland
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Semenkova A, Izosimova Y, Rzhevskaia A, Skryleva P, Vlasova I, Romanchuk A, Kalmykov S, Tolpeshta I. The features of Cs sorption onto peaty-podzolic-gleyic soil. CHEMOSPHERE 2023; 339:139580. [PMID: 37480949 DOI: 10.1016/j.chemosphere.2023.139580] [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: 05/13/2023] [Revised: 07/16/2023] [Accepted: 07/18/2023] [Indexed: 07/24/2023]
Abstract
This article studies sorption regularities and estimates the strength of 137Cs fixation by various soil horizons in peaty-podzolic-gleyic soils under a model experiment. The interaction time varied from 1 week to 3 months while Cs concentration varied from trace to micromolar concentrations. To understand the interaction mechanisms of cesium with individual soil components, we used the method of sequential removal of organic matter and non-silicate iron compounds from the soil before the sorption experiment. Illite and vermiculite were found to be the main soil components for radiocesium sorption in the mineral soil horizons. The highly selective positions (FES - frayed edge sites) of the abovementioned minerals fixed radiocesium so strongly that even strong acid solutions could not extract it from soil. Organic matter significantly contributed to the fixation of radiocesium in the soil only in the ELih horizon which contained 4.71% Corg. In the ELg horizon, a small amount of organic matter was able to inhibit sorption by blocking highly selective to radiocesium FES. The Tessier sequential extraction method of radiocesium revealed that all the studied soil samples could strongly fix the radionuclide. Increasing the interaction period up to three months under periodic wetting and drying contributed to the increased proportion of strongly bound 137Cs. The results of sorption experiments carried out before and after the removal of non-silicate iron compounds from the soil indicate that 137Cs has little or no sorption on the surface of iron hydroxides.
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Affiliation(s)
- Anna Semenkova
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory 1/3, 119991, Moscow, Russia
| | - Yulia Izosimova
- Lomonosov Moscow State University, Department of Soil Science, Leninskie Gory 1/12, 119991, Moscow, Russia
| | - Aleksandra Rzhevskaia
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory 1/3, 119991, Moscow, Russia
| | - Polina Skryleva
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory 1/3, 119991, Moscow, Russia
| | - Irina Vlasova
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory 1/3, 119991, Moscow, Russia
| | - Anna Romanchuk
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory 1/3, 119991, Moscow, Russia.
| | - Stepan Kalmykov
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory 1/3, 119991, Moscow, Russia
| | - Inna Tolpeshta
- Lomonosov Moscow State University, Department of Soil Science, Leninskie Gory 1/12, 119991, Moscow, Russia
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Wang W, Shi L, Wu H, Ding Z, Liang J, Li P, Fan Q. Interactions between micaceous minerals weathering and cesium adsorption. WATER RESEARCH 2023; 238:119918. [PMID: 37121199 DOI: 10.1016/j.watres.2023.119918] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 03/24/2023] [Accepted: 03/25/2023] [Indexed: 05/17/2023]
Abstract
The environmental behavior of radioactive cesium (RCs) in contaminated areas is generally governed by soil and sediment components and natural weathering conditions. In this study, desorption tests and spectroscopic approaches were used to explore the interaction between the weathering of micaceous minerals (i.e., biotite and phlogopite) and the adsorption of Cs+ and the critical role of weathering in the environmental behavior of RCs. Results showed that the reaction sequence between weathering and Cs+ adsorption significantly affected the surface species of Cs+ and the structure of biotite and phlogopite. Regardless of whether it occurred before, after, or during Cs+ adsorption, weathering generated more high-affinity adsorption sites, namely, interlayer sites (ITs) and frayed edge sites (FESs), to different extents, and then facilitated the uptake of Cs+ at FESs and ITs on micaceous minerals in a poorly exchangeable state. Cs+ stabilized the micaceous mineral structure once it was absorbed within collapsed interlayers by hindering cation exchange and preventing further destruction during weathering. As important weathering factors, high temperature and Ca2+ content promoted the binding of Cs+ in the interlayers of biotite and phlogopite by enhancing interlayer cation exchange. These findings are beneficial for a better understanding of the environmental behaviors of RCs in the hydrosphere and pedosphere.
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Affiliation(s)
- Wei Wang
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China; Key Laboratory of Strategic Mineral Resources of the Upper Yellow River, Ministry of Natural Resources, Lanzhou 730046, China
| | - Leiping Shi
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China; Key Laboratory of Strategic Mineral Resources of the Upper Yellow River, Ministry of Natural Resources, Lanzhou 730046, China
| | - Hanyu Wu
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Zhe Ding
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China; Key Laboratory of Strategic Mineral Resources of the Upper Yellow River, Ministry of Natural Resources, Lanzhou 730046, China
| | - Jianjun Liang
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China; Key Laboratory of Strategic Mineral Resources of the Upper Yellow River, Ministry of Natural Resources, Lanzhou 730046, China
| | - Ping Li
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China; Key Laboratory of Strategic Mineral Resources of the Upper Yellow River, Ministry of Natural Resources, Lanzhou 730046, China
| | - Qiaohui Fan
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China; Key Laboratory of Strategic Mineral Resources of the Upper Yellow River, Ministry of Natural Resources, Lanzhou 730046, China.
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Ma C, Qi C, Wei D, Jiang Z, Guo Y, Belzile N, Deng T. Novel Zr-Doped Thiostannate Spinning Fiber (Fiber-KZrTS) for Highly Efficient and Renewable Recovery of Cesium and Strontium from Geothermal Water. ACS APPLIED MATERIALS & INTERFACES 2023; 15:13589-13599. [PMID: 36864004 DOI: 10.1021/acsami.2c21397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The efficient and renewable recovery of cesium and strontium by absorption from a new type of geothermal water liquid mineral resource is highly desirable but still challenging. In this work, a new Zr-doped layered potassium thiostannate adsorbent (KZrTS) was first synthesized and used for Cs+ and Sr2+ green and efficient adsorption. It was found that KZrTS had very fast adsorption kinetics toward both Cs+ and Sr2+ with an equilibrium reached within 1 min, and the theoretical maximum adsorption capacities for Cs+ and Sr2+ were 402.84 and 84.88 mg/g, respectively. Moreover, to solve the loss problem of the engineering application of the powdered adsorbent KZrTS, KZrTS was uniformly coated with polysulfone by wet spinning technology to form micrometer-level filament-like absorbents (Fiber-KZrTS), whose adsorption equilibrium rates and capacities toward Cs+ and Sr2+ are almost the same as that of powder. Furthermore, Fiber-KZrTS showed excellent reusability, and the adsorption performance remained virtually unchanged after 20 cycles. Therefore, Fiber-KZrTS has potential application for green and efficient cesium and strontium recovery from geothermal water.
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Affiliation(s)
- Chi Ma
- Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Chenyu Qi
- Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Dingbo Wei
- Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Zhenzhen Jiang
- Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, PR China
- Central Laboratory of Tibet Autonomous Region Bureau of Geological & Mineral Resources, Lasa 850033, PR China
| | - Yafei Guo
- Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Nelson Belzile
- School of Natural Sciences, Laurentian University, Sudbury, Ontario P3E 2C6, Canada
| | - Tianlong Deng
- Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, PR China
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Eun S, Han YS, Kim H, Kim M, Ryu J, Park JH, Lim JM, Kim S. Photoinduced enhancement of 137Cs removal by NiFe Prussian blue analogue-alginate hydrogel. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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10
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Dubus J, Leonhardt N, Latrille C. Multi-cation exchanges involved in cesium and potassium sorption mechanisms on vermiculite and micaceous structures. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:1579-1594. [PMID: 35918581 DOI: 10.1007/s11356-022-22321-4] [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: 03/28/2022] [Accepted: 07/27/2022] [Indexed: 06/15/2023]
Abstract
Vermiculite and micaceous minerals are relevant Cs+ sorbents in soils and sediments. To understand the bioavailability of Cs+ in soils resulting from multi-cation exchanges, sorption of Cs+ onto clay minerals was performed in batch experiments with solutions containing Ca2+, Mg2+, and K+. A sequence between a vermiculite and various micaceous structures has been carried out by conditioning a vermiculite at various amounts of K. Competing cation exchanges were investigated as function of Cs+ concentration. The contribution of K+ on trace Cs+ desorption is probed by applying different concentrations of K+ on Cs-doped vermiculite and micaceous structures. Cs sorption isotherms at chemical equilibrium were combined with elemental mass balances in solution and structural analyses. Cs+ replaces easily Mg2+ > Ca2+ and competes scarcely with K+. Cs+ is strongly adsorbed on the various matrix, and a K/Cs ratio of about a thousand is required to remobilize Cs+. Cs+ is exchangeable as long as the clay interlayer space remains open to Ca2+. However, an excess of K+, as well as Cs+, in solution leads to the collapse of the interlayer spaces that locks the Cs into the structure. Once K+ and/or Cs+ collapse the interlayer space, the external sorption sites are then particularly involved in Cs sorption. Subsequently, Cs+ preferentially exchanges with Ca2+ rather than Mg2+. Mg2+ is extruded from the interlayer space by Cs+ and K+ adsorption, excluded from short interlayer space and replaced by Ca2+ as Cs+ desorbs.
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Affiliation(s)
- Julien Dubus
- Service d'Etude du Comportement Des Radionucléides, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
- CEA, CNRS, BIAM, Aix Marseille Université, 13108, Saint-Paul-Lez-Durance, France
| | - Nathalie Leonhardt
- CEA, CNRS, BIAM, Aix Marseille Université, 13108, Saint-Paul-Lez-Durance, France
| | - Christelle Latrille
- Service d'Etude du Comportement Des Radionucléides, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette, France.
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11
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Shahinpour A, Tanhaei B, Ayati A, Beiki H, Sillanpää M. Binary dyes adsorption onto novel designed magnetic clay-biopolymer hydrogel involves characterization and adsorption performance: Kinetic, equilibrium, thermodynamic, and adsorption mechanism. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120303] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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12
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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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13
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Cao Y, Zhou L, Ren H, Zou H. Determination, Separation and Application of 137Cs: A Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph191610183. [PMID: 36011815 PMCID: PMC9408292 DOI: 10.3390/ijerph191610183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/13/2022] [Accepted: 08/14/2022] [Indexed: 05/21/2023]
Abstract
In the context of the rapid development of the world's nuclear power industry, it is necessary to establish background data on radionuclides of different samples from different regions, and the premise of obtaining such basic data is to have a series of good sample processing and detection methods. The radiochemical analysis methods of low-level radionuclides 137Cs (Cesium) in environmental and biological samples are introduced and reviewed in detail. The latest research progress is reviewed from the five aspects of sample pretreatment, determination, separation, calculation, application of radioactive cesium and the future is proposed.
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14
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Jiang Q, Wang Y, Cheng J, Pan Y, Ren J, Leng Y, Liu Y, Bao C, Wang L, Tuo X. Sorption of cesium on surrounding granite of Chinese low- and medium-level nuclear waste repository in the groundwater environment. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08280-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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15
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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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16
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Manikandan S, Subbaiya R, Saravanan M, Ponraj M, Selvam M, Pugazhendhi A. A critical review of advanced nanotechnology and hybrid membrane based water recycling, reuse, and wastewater treatment processes. CHEMOSPHERE 2022; 289:132867. [PMID: 34774910 DOI: 10.1016/j.chemosphere.2021.132867] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 10/20/2021] [Accepted: 11/08/2021] [Indexed: 05/28/2023]
Abstract
One of the modern challenges is to provide clean and affordable drinking water. Water scarcity is caused by the growing population in the world and pollutants contaminate all remaining water sources. Innovative water treatment solutions have been provided by nanotechnology. Microorganisms, organic suspensions, and inorganic heavy metal ions, among other things, are common water contaminants. Since antiquity, a wide range of water clean-up methods have been employed to address this issue. Breakthroughs in water purification procedures have occurred during the previous four decades, with the most significant one being the use of nanomaterials and nanomembranes. Nanoparticles and nanomembranes (polymeric membranes) have recently been used in engineered materials (TiO2, ZnO, CuO, Ag, CNT's and mixed oxide nanoparticles, for example). Engineered nanomembranes, nanocomposites and nanoparticles have been used in this review article's discussion of water purification technologies. The review also discusses the risk and solutions of using nanoparticles and nanocomposites in the future.
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Affiliation(s)
- Sivasubramanian Manikandan
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Nagar, Thandalam, Chennai, 602 105, Tamil Nadu, India
| | - Ramasamy Subbaiya
- Department of Biological Sciences, School of Mathematics and Natural Sciences, The Copperbelt University, Riverside, Jambo Drive, P O Box, 21692, Kitwe, Zambia
| | - Muthupandian Saravanan
- Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, 60007, Chennai, India.
| | - Mohanadoss Ponraj
- Department of Biological Sciences, School of Mathematics and Natural Sciences, The Copperbelt University, Riverside, Jambo Drive, P O Box, 21692, Kitwe, Zambia
| | - Masilamani Selvam
- Department of Biotechnology, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Chennai, 600 095, Tamil Nadu, India
| | - Arivalagan Pugazhendhi
- School of Renewable Energy, Maejo University, Chiang Mai, Thailand; College of Medical and Health Science, Asia University, Taichung, Taiwan.
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17
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Huang T, Zhou L, Zhang SW, Li A. Uptake of cesium by the hydroxysulfate green rust-modified composite aluminosilicate materials, mathematical modeling, and mechanisms. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127314] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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18
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Jung Y, Choi US, Ko YG. Securely anchored Prussian blue nanocrystals on the surface of porous PAAm sphere for high and selective cesium removal. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126654. [PMID: 34329079 DOI: 10.1016/j.jhazmat.2021.126654] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 07/02/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
Prussian blue (PB) has been well known as a pigment crystal to selectively sequestrate the radioactive cesium ion released from aqueous solutions owing to PB cage size similar to the cesium ion. Because the small size of PB is hard to deal with, the adsorbents containing PB have been prepared in the form of composites causing low sequestration efficiency of cesium. In this study, securely anchored PB nanocrystals on the surface of millimeter-sized porous polyacrylamide (PAAm) spheres (PB@PAAm) have been prepared by the crystallization of PB on the Fe3+ adsorbed PAAm. The securely anchored PB nanocrystals have been demonstrated to be selective and efficient adsorbents for sequestration of the radioactive cesium. The well-interconnected-spherical pores and millimeter-sized diameter of the PB@PAAm adsorbents facilitated permeation of Cs+ into the adsorbent and ease of handling respectively. Especially the well-interconnected-spherical pores allowed that PB@PAAm showed 90% of its maximum Cs+ adsorption capacity within 30 min. The PB@PAAm showed an outstanding Cs+ capture ability of 374 mg/g, high removal efficiency of 85% even at low concentration of Cs+ (10 ng/L), and superior selectivity of Cs+ against interference ions of Na+, K+, Mg2+, and Ca2+.
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Affiliation(s)
- Youngkyun Jung
- Division of Energy & Environment Technology, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea; National Agenda Research Division, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Ung Su Choi
- Division of Energy & Environment Technology, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea; National Agenda Research Division, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Young Gun Ko
- Department of Chemical Engineering and Materials Science, Sangmyung University, Hongjimun 2-gil 20, Jongno-gu, Seoul, Republic of Korea.
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19
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Yamasaki S, Utsunomiya S. A review of efforts for volume reduction of contaminated soil in the ten years after the accident at the Fukushima Daiichi Nuclear Power Plant. J NUCL SCI TECHNOL 2021. [DOI: 10.1080/00223131.2021.1974596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Shinya Yamasaki
- Department of Chemistry, Faculty of Pure and Applied Sciences and Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, Tsukuba, Ibaraki, Japan
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20
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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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21
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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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22
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Sun Y, Li X, Wang T, Ji Y, Yue Y, Li Y, Wang S. Novel multi-hydroxyl containing organo-vermiculite for effective removal of 2-Naphthol: adsorption studies and model calculations. SEP SCI TECHNOL 2021. [DOI: 10.1080/01496395.2021.1972009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Yaxun Sun
- Department of Physics, Innovation Center of Materials for Energy and Environment Technologies, College of Science, Tibet University, Lhasa, China
- Institute of Oxygen Supply, Center of Tibetan Studies (Everest Research Institute), Tibet University, Lhasa, China
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, Lhasa, China
| | - Xin Li
- Department of Physics, Innovation Center of Materials for Energy and Environment Technologies, College of Science, Tibet University, Lhasa, China
- Institute of Oxygen Supply, Center of Tibetan Studies (Everest Research Institute), Tibet University, Lhasa, China
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, Lhasa, China
- Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic, Shenzhen, China
| | - Tingting Wang
- Department of Physics, Innovation Center of Materials for Energy and Environment Technologies, College of Science, Tibet University, Lhasa, China
- Institute of Oxygen Supply, Center of Tibetan Studies (Everest Research Institute), Tibet University, Lhasa, China
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, Lhasa, China
- Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic, Shenzhen, China
| | - Yaxiong Ji
- Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic, Shenzhen, China
| | - Yihang Yue
- Department of Physics, Innovation Center of Materials for Energy and Environment Technologies, College of Science, Tibet University, Lhasa, China
- Institute of Oxygen Supply, Center of Tibetan Studies (Everest Research Institute), Tibet University, Lhasa, China
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, Lhasa, China
| | - Yong Li
- Department of Physics, Innovation Center of Materials for Energy and Environment Technologies, College of Science, Tibet University, Lhasa, China
- Institute of Oxygen Supply, Center of Tibetan Studies (Everest Research Institute), Tibet University, Lhasa, China
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, Lhasa, China
| | - Shifeng Wang
- Department of Physics, Innovation Center of Materials for Energy and Environment Technologies, College of Science, Tibet University, Lhasa, China
- Institute of Oxygen Supply, Center of Tibetan Studies (Everest Research Institute), Tibet University, Lhasa, China
- Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, Lhasa, China
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Park CW, Kim T, Yang HM, Lee Y, Kim HJ. Active and selective removal of Cs from contaminated water by self-propelled magnetic illite microspheres. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126226. [PMID: 34492980 DOI: 10.1016/j.jhazmat.2021.126226] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 04/29/2021] [Accepted: 05/23/2021] [Indexed: 06/13/2023]
Abstract
We report the fabrication of clay-mineral-based Janus microspheres that exhibit remotely steerable self-propulsion in water, facilitating their selective and active removal of radiocesium from a contaminated solution. The spray-drying of slurries of intrinsically Cs-selective illite containing iron oxide nanoparticles led to magnetic illite microspheres with superior 137Cs adsorption capability and superparamagnetic behavior. The Janus micromotor adsorbent was prepared by depositing catalytic Pt onto the half-surface of magnetic illite microspheres. The micromotor adsorbents exhibited self-propulsion at speeds as high as ~265 µm/s via asymmetric bubble generation in water containing H2O2 as a fuel. The self-propulsion of the adsorbent improved the Cs adsorption kinetics six-folds compared with the kinetics in the corresponding stationary liquid. The magnetic properties of the micromotor adsorbent enabled convenient separation and direction control of the adsorbents under an external magnetic field. In particular, the micromotor adsorbent could successfully remove more than 98.6% of 137Cs from aqueous media containing competing ions including K+, Na+, Ca2+ and Mg2+.
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Affiliation(s)
- Chan Woo Park
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon, Republic of Korea.
| | - Taeeun Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon, Republic of Korea; Department of Environmental Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea
| | - Hee-Man Yang
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon, Republic of Korea
| | - Yeonsoo Lee
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon, Republic of Korea; Department of Organic Materials Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea
| | - Hyung-Ju Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon, Republic of Korea
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24
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Park CW, Kim SM, Kim I, Yoon IH, Hwang J, Kim JH, Yang HM, Seo BK. Sorption behavior of cesium on silt and clay soil fractions. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2021; 233:106592. [PMID: 33774591 DOI: 10.1016/j.jenvrad.2021.106592] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 01/07/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
The effect of clay mineral composition on Cs adsorption behavior of silt and clay fractions (SC-fractions) of soil was investigated. Surface soil samples were collected within 2 km of Kori and Wolsong nuclear power plants in South Korea, and SC-fractions (<20 μm) were separated. The physicochemical properties of SC-fractions and types of clay minerals contained in the SC-fractions were analyzed. The cesium adsorption capacity of the SC-fractions, and affinity between the SC-fractions and Cs, were investigated by isothermal adsorption analysis using the dual-site Langmuir adsorption model. To understand selective adsorption of Cs, the radiocesium interception potential and distribution coefficient of the SC-fractions were analyzed in the presence or absence of competing ions. The radiocesium distribution coefficient of the SC-fractions showed a trend similar to that of the Langmuir sorption coefficient of high-affinity binding sites for Cs in the SC-fractions. The SC-fractions of Kori soils that contain only non-expandable clay minerals including highly weathered mica had low Cs adsorption capacity. However, the SC-fractions of Kori soils showed higher Cs adsorption selectivity compared to the SC-fractions of Wolsong soils containing expandable clay minerals and micaceous mineral with a low degree of weathering. It is predicted that the highly weathered micas have high affinity to Cs, and such clay minerals contribute the most to the adsorption process in dilute solutions.
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Affiliation(s)
- Chan Woo Park
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero, 989-111, Yuseong-gu, Daejeon, Republic of Korea.
| | - Sung-Man Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero, 989-111, Yuseong-gu, Daejeon, Republic of Korea
| | - Ilgook Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero, 989-111, Yuseong-gu, Daejeon, Republic of Korea
| | - In-Ho Yoon
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero, 989-111, Yuseong-gu, Daejeon, Republic of Korea
| | - Juri Hwang
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero, 989-111, Yuseong-gu, Daejeon, Republic of Korea
| | - June-Hyun Kim
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero, 989-111, Yuseong-gu, Daejeon, Republic of Korea
| | - Hee-Man Yang
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero, 989-111, Yuseong-gu, Daejeon, Republic of Korea
| | - Bum Kyung Seo
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero, 989-111, Yuseong-gu, Daejeon, Republic of Korea
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Chen S, Yang X, Wang Z, Hu J, Han S, Guo Y, Deng T. Prussian blue analogs-based layered double hydroxides for highly efficient Cs + removal from wastewater. JOURNAL OF HAZARDOUS MATERIALS 2021; 410:124608. [PMID: 33243651 DOI: 10.1016/j.jhazmat.2020.124608] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/14/2020] [Accepted: 11/16/2020] [Indexed: 06/11/2023]
Abstract
In this work, novel Prussian blue analogs-based layered double hydroxide (PBA@ZnTi-LDH) was in situ synthesized and used for radioactive Cs+ removal from wastewater. The results suggested that this PBA@ZnTi-LDH prepared using LDH as skeleton and transition metal source showed higher adsorption capacity (243.9 mg/g) and water stability than conventional PBAs, and promising application in scale-up Cs+ removal. Thus, it was granulated by calcium alginate and the PBA@ZnTi-LDH/CaALG exhibited favorable post-separation and fixed-bed adsorption ability at different Cs+ concentrations and flow rates, highlighting its application perspective on Cs+ removal from various kinds of wastewater. Moreover, the real-world Cs+ removal was preliminarily explored using natural complex Cs+-containing water. As a result, this stable and easily separated PBA@ZnTi-LDH/CaALG showed high removal efficiency, selectivity and good reusability, which was promising in scale-up Cs+ removal from the real-world wastewater.
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Affiliation(s)
- Shangqing Chen
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Xiaonan Yang
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Zheng Wang
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Jiayin Hu
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China.
| | - Senjian Han
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Yafei Guo
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China.
| | - Tianlong Deng
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China
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Wang Y, Guo H, Wang S, Zhang J, Zhu Z, Li X, Dong H. Sulfuric acid modified expanded vermiculite cover for reducing ammonia emissions from animal slurry storage. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123954. [PMID: 33264998 DOI: 10.1016/j.jhazmat.2020.123954] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/22/2020] [Accepted: 09/05/2020] [Indexed: 06/12/2023]
Abstract
Animal slurry storage is an important source of NH3 emission which has raised a high attention regarding its influence on air quality and environment health. There is an urgent need to develop an efficient, green and safe technology for reducing NH3 emission. This study introduced a novel method of reducing NH3 emission from dairy slurry storage using H2SO4 modified expanded vermiculite cover (H2SO4-VM1). Results showed that NH3 mitigation of 87% was achieved in the treatment of H2SO4-VM1 during 77 days of slurry storage, which could be mainly caused by conversion of free NH3 to NH4+ in acidified slurry surface and vermiculite layer, the cover barrier for gases emissions, NH4+ adsorption by vermiculite cover, and direct adsorption of free NH3 in the vermiculite layer. The NH3 mitigation of H2SO4-VM1 was comparable to that (90%) of the traditional method of H2SO4 acidification for slurry storage (H2SO4-AC1). The N2O emission, H2S emission, and H2SO4 consumption in H2SO-VM1 were 28, 93 and 39% lower than those in H2SO4-AC1, respectively. Economic cost calculated based on material input in H2SO-VM1 method was 0.40 USD m-2 slurry. It's suggested that H2SO4-VM1 can be a possible alternative for reducing NH3 emissions from animal slurry storage.
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Affiliation(s)
- Yue Wang
- Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100087, China
| | - He Guo
- Urban Construction School, Beijing City University, Beijing 100083, China
| | - Shunli Wang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jianan Zhang
- College of Resources and Environment Science, Hebei Agricultural University, Baoding 071000, China
| | - Zhiping Zhu
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Xinrong Li
- Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100087, China
| | - Hongmin Dong
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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A review on emerging composite materials for cesium adsorption and environmental remediation on the latest decade. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117340] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Varley A, Tyler A, Wilson C. Near real-time soil erosion mapping through mobile gamma-ray spectroscopy. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2020; 223-224:106400. [PMID: 32937266 DOI: 10.1016/j.jenvrad.2020.106400] [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: 06/01/2020] [Revised: 08/05/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
Soil erosion has been associated with various negative environmental impacts foremost of which is the potential pressure it could impose on global food security. The poor conditions of our agricultural soil can be attributed to years of unsustainable farming practices occurring throughout history that has placed significant pressure on the environment. Moreover, climate change scenarios indicate further intensification which is likely making prediction and assessment of erosion processes critical for long term agricultural sustainability. This study demonstrates the potential of mobile gamma-ray spectrometry with large volume NaI(Tl) detectors to identify, at high spatial resolution, changes in 137Cs soil concentration within the ploughed layer of soil and enabling the soil erosion processes to be quantified. This technique represents a significant advantage over conventional spatially-isolated point measurements such as soil sampling as it offers real time mapping at the field scale. However, spectral signal derived from measurements in the field are highly dependent on the calibration procedure used and are particularly sensitive to source-detector changes such as the presence of a vehicle, ground curvature and soil moisture content. Conventional calibration procedures tend to not consider these potential sources of uncertainty potentially leaving the system vulnerable to systematic uncertainties, especially when 137Cs concentrations are low. This study used Monte Carlo simulations to investigate such changes utilising additional information including a high-resolution digital terrain model. The method was demonstrated on a ploughed site in Scotland, revealing a mixture of tillage and water erosion patterns supported by soil core data. Findings showed that the sites topography had relatively little effect (<10%) on calculated erosion rates, but moisture content could be the determining factor, albeit very difficult to measure reliably throughout a survey.
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Affiliation(s)
- Adam Varley
- Department of Biological and Environmental Sciences, University of Stirling, Stirling, FK9 4LA, United Kingdom.
| | - Andrew Tyler
- Department of Biological and Environmental Sciences, University of Stirling, Stirling, FK9 4LA, United Kingdom
| | - Clare Wilson
- Department of Biological and Environmental Sciences, University of Stirling, Stirling, FK9 4LA, United Kingdom
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29
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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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30
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Tachi Y, Sato T, Takeda C, Ishidera T, Fujiwara K, Iijima K. Key factors controlling radiocesium sorption and fixation in river sediments around the Fukushima Daiichi Nuclear Power Plant. Part 2: Sorption and fixation behaviors and their relationship to sediment properties. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 724:138097. [PMID: 32247124 DOI: 10.1016/j.scitotenv.2020.138097] [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: 10/30/2019] [Revised: 03/15/2020] [Accepted: 03/19/2020] [Indexed: 06/11/2023]
Abstract
We systematically investigated the sorption and fixation behaviors of radiocesium (137Cs) for sediments taken from the rivers of Ukedo and Odaka around the Fukushima Daiichi Nuclear Power Plant. By comparing the Cs sorption and sequential desorption results at various Cs concentrations, across a range of sediment properties, we were able to understand the different contributions at frayed edge sites (FESs) and regular exchange sites (RESs) of the clay minerals, and their relationships with the Cs concentrations and the contents of organic matter (OM). The Cs sorption and fixation were dominated by FESs at trace Cs concentrations, and by ion exchange at RES and the collapse of interlayers at higher Cs concentrations. The Cs sorption at lower Cs concentration was strongly related to radiocesium interception potential (RIP); however, Cs fixation was more related to clay mineralogy (i.e. contents of mica, vermiculite and hydroxy-interlayered vermiculite) rather than the RIP. The first-order kinetic constants for time-dependent Cs sorption at low Cs concentrations were correlated negatively to the ratio between the total organic carbon and RIP values. This implies that Cs access to FESs requires a relatively long duration that is dependent on the contents of the OM. From these results, the sorption and fixation mechanisms were confirmed to be significantly different at different Cs concentrations. Then, the prediction of Cs transport should be based on the key mechanisms that are dominant at the actual trace levels of Cs. A significant difference between the Cs fixation behaviors at the Ukedo River and Odaka River may be understood by considering the differences in their clay mineralogy, due to the different geological settings and weathering stages of both catchments.
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Affiliation(s)
- Yukio Tachi
- Japan Atomic Energy Agency, 4-33 Muramatsu, Tokai, Ibaraki 319-1194, Japan.
| | - Tomofumi Sato
- Japan Atomic Energy Agency, 4-33 Muramatsu, Tokai, Ibaraki 319-1194, Japan
| | - Chizuko Takeda
- Tokyo Nuclear Service Inc., Midorigahara 4-19-2, Tsukuba, Ibaraki 300-2646, Japan
| | - Takamitsu Ishidera
- Japan Atomic Energy Agency, 4-33 Muramatsu, Tokai, Ibaraki 319-1194, Japan
| | - Kenso Fujiwara
- Japan Atomic Energy Agency, 10-2 Fukasaku, Miharu, Tamura, Fukushima 963-7700, Japan
| | - Kazuki Iijima
- Japan Atomic Energy Agency, 10-2 Fukasaku, Miharu, Tamura, Fukushima 963-7700, Japan
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31
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Goyal N, Gao P, Wang Z, Cheng S, Ok YS, Li G, Liu L. Nanostructured chitosan/molecular sieve-4A an emergent material for the synergistic adsorption of radioactive major pollutants cesium and strontium. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122494. [PMID: 32193120 DOI: 10.1016/j.jhazmat.2020.122494] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 03/06/2020] [Accepted: 03/07/2020] [Indexed: 06/10/2023]
Abstract
A fresh adsorbent nanostructured chitosan/molecular sieve 4A hybrid (NSC@MS-4A) was fabricated for the rapid adsorption of strontium (Sr2+) and cesium (Cs+) ions from aqueous solutions. The as-obtained NSC@MS-4A were thoroughly characterized by XRD, FE-SEM, EDS, BET, XPS and FT-IR. The physio-chemical properties and structural aspects revealed that NSC@MS-4A acquires fine surface area (72 m2/g), porous structure as well as compatible functional groups (-P-O-P and -C-O-C) for the admission of Cs+ and Sr2+ ions. The batch adsorption studies concluded that prepared adsorbent displayed a maximum adsorption of 92-94 % within 40 min. Fast adsorption of Cs+ and Sr2+ was achieved at neutral pH (6-7), ambient temperature (25-30 °C) and slow agitation speed (50-60 rpm) which could propose vast benefits such as little power utilization and uncomplicated operation. Among six types of adsorption isotherms, Freundlich isotherm showed the best fit with R2>0.997. Pseudo-second order made a better agreement as compare to other kinetic models. The thermodynamic coefficients suggested the passage of Cs+ and Sr2+ ions through the liquid solid boundary is exothermic and spontaneous. The NSC@MS-4A displayed excellent regenerability properties over five repetitive adsorption/desorption cycles, which specified that as-obtained NSC@MS-4A is a sustainable as well as efficient adsorbent for practical decontamination of radioactive liquid waste.
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Affiliation(s)
- Nitin Goyal
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China
| | - Peng Gao
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China
| | - Zhe Wang
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China
| | - Shuwen Cheng
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China
| | - Yong Sik Ok
- Korea Biochar Research Center, O-Jeong Eco-Resilience Institute (OJERI) & Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea; Sustainable Minerals Institute, The University of Queensland, Brisbane, Australia
| | - Gang Li
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China; Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia.
| | - Liying Liu
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China.
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32
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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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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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Pipíška M, Ballová S, Frišták V, Ďuriška L, Horník M, Demčák Š, Holub M, Soja G. Potassium nickel(II) hexacyanoferrate(III)-functionalized biochar for selective separation of radiocesium from liquid wastes. JOURNAL OF RADIATION RESEARCH AND APPLIED SCIENCES 2020. [DOI: 10.1080/16878507.2020.1740394] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- M. Pipíška
- Department of Chemistry, Faculty of Education, Trnava University in Trnava, Trnava, Slovak Republic
| | - S. Ballová
- Department of Ecochemistry and Radioecology, Faculty of Natural Sciences, University of SS. Cyril and Methodius in Trnava, Trnava, Slovak Republic
| | - V. Frišták
- Department of Chemistry, Faculty of Education, Trnava University in Trnava, Trnava, Slovak Republic
| | - L. Ďuriška
- Institute of Materials Science, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in Bratislava, Trnava, Slovak Republic
| | - M. Horník
- Department of Ecochemistry and Radioecology, Faculty of Natural Sciences, University of SS. Cyril and Methodius in Trnava, Trnava, Slovak Republic
| | - Š. Demčák
- Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Košice, Košice, Slovak Republic
| | - M. Holub
- Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Košice, Košice, Slovak Republic
| | - G. Soja
- Energy Department, AIT Austrian Institute of Technology GmbH, Tulln an Der Donau, Austria
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35
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Yang G, Zhou L. Montmorillonite-catalyzed conversions of carbon dioxide to formic acid: Active site, competitive mechanisms, influence factors and origin of high catalytic efficiency. J Colloid Interface Sci 2020; 563:8-16. [PMID: 31865051 DOI: 10.1016/j.jcis.2019.12.064] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 12/10/2019] [Accepted: 12/15/2019] [Indexed: 11/30/2022]
Abstract
Design of heterogeneous catalysts for CO2 conversions to value-added chemicals is highly desirable. Montmorillonite and other clay minerals have been used widely in catalytic reactions including CO2 hydrogenation, while a molecular-level understanding remains lacking. In this study, periodic density functional theory calculations are employed and a comprehensive understanding about montmorillonite-catalyzed CO2 hydrogenation to formic acid is given, including active site, mechanism, influence factors, competitive reaction paths, and origin of superior catalysis. Catechol that is readily available and can also be considered as a fragment of abundantly distributed humic substances is an effective hydrogen source. The penta-coordinated M3+ (M2+) sites of edge surfaces are active sites, and reactions occur preferentially at M2+ rather than M3+ sites. The catalytic activities depend strongly on the identity of M2+ (M3+) cations, and all reaction paths follow the concerted mechanisms transferring two hydrogen atoms in one step, with those producing formate being highly preferred. M2+/Al3+ substitutions and substituent effects are two critical factors to affect catalytic activities, and with synergy of Mg2+/Al3+ substitutions and -NMe2 substituent, reactions are exergonic (-0.09 eV) and activation barriers are so low (0.48 eV) that formate can be facilely produced at ambient conditions. Edge surfaces of clay minerals are bifunctional catalysts, with M2+ cations showing Lewis acids and MOH groups playing similar effects as basic additives. Results provide new insights about heterogeneous catalysis of CO2 hydrogenation and other reactions.
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Affiliation(s)
- Gang Yang
- College of Resources and Environment & Chongqing Key Laboratory of Soil Multi-scale Interfacial Process, Southwest University, Chongqing 400715, China; State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
| | - Lijun Zhou
- College of Resources and Environment & Chongqing Key Laboratory of Soil Multi-scale Interfacial Process, Southwest University, Chongqing 400715, China
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Liu WT, Tsai SC, Tsai TL, Lee CP, Lee CH. An EXAFS study for characterizing the time-dependent adsorption of cesium on bentonite. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2019; 21:930-937. [PMID: 31089603 DOI: 10.1039/c9em00124g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Bentonite is considered for use as a buffer material in the final disposal repositories of radioactive waste. Long-lived 135Cs with a half-life of 2.3 × 106 years is a key radionuclide in high-level waste, and lots of 137Cs with a half-life of 30.2 years exists in low-level waste. Therefore, the adsorption of Cs on bentonite is a critical issue in evaluating the long-term safety of radioactive waste disposal. In this study, EXAFS techniques were used to characterize the time-dependent process from the beginning of adsorption to equilibrium. From the results of this study, we found changes including to the Cs adsorption sites, the Cs-O distance between Cs and the oxygen atom, and that the adsorption of Cs ions occurred before the reaction reached equilibrium. The fraction of OS complexes when Cs was adsorbed on bentonite can refer to the CN (Cs-O1st)/CN (Cs-O2nd) ratio of coordination numbers, and this study found that the OS complex was the major adsorption species when Cs adsorbed onto bentonite. In addition to the ratio CN (Cs-O1st)/CN (Cs-O2nd) providing information on the adsorption site, we also discussed the change of Cs-O1st and Cs-O2nd bond distances to identify the adsorption sites at different times. Comparing the XRD patterns of montmorillonite and bentonite, we found that the interlayer collapsed after Cs was adsorbed onto montmorillonite, but it expanded after Cs was adsorbed onto bentonite. From the results of EXAFS fitting, we found that the movement of Cs ions was from regular interlayer sites to expanded interlayer sites, which caused the interatomic distance of Cs-O2nd to decrease with an increase in time. It was revealed that the adsorption of Cs on bentonite occurred in two steps. The first step includes the rapid uptake of Cs by attachment to the oxygen atoms of the H2O molecules at the regular interlayer sites, especially for the OS complexes. The second step includes a slower process where dehydrated Cs ions move from the regular interlayer sites to the expanded interlayer sites. In this study, Cs L3-edge EXAFS spectroscopy was conducted for the Cs adsorbed on bentonite to identify the Cs adsorption sites over time, as this is important in evaluating the mobility of Cs in the environment. These results are beneficial in finding the process of Cs adsorption on bentonite, which could be used for the design of the final disposal of spent nuclear fuel.
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Affiliation(s)
- Wey-Tsang Liu
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan.
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Claverie M, Garcia J, Prevost T, Brendlé J, Limousy L. Inorganic and Hybrid (Organic⁻Inorganic) Lamellar Materials for Heavy metals and Radionuclides Capture in Energy Wastes Management-A Review. MATERIALS 2019; 12:ma12091399. [PMID: 31035735 PMCID: PMC6539926 DOI: 10.3390/ma12091399] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/18/2019] [Accepted: 04/24/2019] [Indexed: 02/03/2023]
Abstract
The energy industry (nuclear, battery, mining industries, etc.) produces a large quantity of hazardous effluents that may contain radionuclides (137Cs and 90Sr in particular) and heavy metals. One of the hardest tasks of environmental safety and sustainable development is the purification of wastewater holding these pollutants. Adsorption is one of the most powerful methods for extracting toxic compounds from wastewater. This study reviews the usefulness of clay minerals as adsorbent for removing these hazardous elements to clean up energy production processes. Phyllosilicates are able to extract several heavy metals from effluent, as widely examined. A particular focus is given to synthetic phyllosilicates and their abilities to entrap heavy metals with a special attention paid to those synthesized by sol-gel route. Indeed, this method is attractive since it allows the development of organic–inorganic hybrids from organosilanes presenting various functions (amino, thiol, etc.) that can interact with pollutants. Regarding these pollutants, a part of this review focuses on the interaction of lamellar materials (natural and synthetic phyllosilicates as well as layered double hydroxide) with heavy metals and another part deals with the adsorption of specific radionuclides, cesium and strontium.
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Affiliation(s)
- Marie Claverie
- Institut de Science des Matériaux de Mulhouse CNRS UMR 7361, Université de Haute-Alsace, Université de Strasbourg, 3b rue Alfred Werner, 68093 Mulhouse, Cedex, France.
| | - Justo Garcia
- Orano, Tour Areva, 1 place Jean Millier, 92400 Courbevoie, France.
| | - Thierry Prevost
- Orano, Tour Areva, 1 place Jean Millier, 92400 Courbevoie, France.
| | - Jocelyne Brendlé
- Institut de Science des Matériaux de Mulhouse CNRS UMR 7361, Université de Haute-Alsace, Université de Strasbourg, 3b rue Alfred Werner, 68093 Mulhouse, Cedex, France.
| | - Lionel Limousy
- Institut de Science des Matériaux de Mulhouse CNRS UMR 7361, Université de Haute-Alsace, Université de Strasbourg, 3b rue Alfred Werner, 68093 Mulhouse, Cedex, France.
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