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Zhang L, Li L, Chen K, Zhang Q, Shao J, Cui Y, Zhu J, Zhang A, Yang S. Adsorption-desorption of 241Am(Ⅲ) on montmorillonite colloids and quartz sand: Effects of pH, ionic strength, colloid concentration and grain size. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2024; 275:107430. [PMID: 38615506 DOI: 10.1016/j.jenvrad.2024.107430] [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: 01/25/2024] [Revised: 03/22/2024] [Accepted: 03/30/2024] [Indexed: 04/16/2024]
Abstract
Clay colloids in the subsurface environment have a strong adsorption capacity for radionuclides, and the mobile colloids will carry the nuclides for migration, which would promote the movability of radionuclides in the groundwater environment and pose a threat to the ecosphere. The investigations of the adsorption/desorption behaviors of radionuclides in colloids and porous media are significant for the evaluation of the geological disposal of radioactive wastes. To illustrate the adsorption/desorption behaviors of 241Am(Ⅲ) in Na-montmorillonite colloid and/or quartz sand systems at different pH (5, 7 and 9), ionic strengths (0, 0.1 and 5 mM), colloid concentrations (300 and 900 mg/L), nuclide concentrations (500, 800, 1100 and 1400 Bq/mL) and grain sizes (40 and 60 mesh), a series of batch sorption-desorption experiments were conducted. Combining the analysis of the physical and chemical properties of Na-montmorillonite with the Freundlich model, the influencing mechanism of different controlling factors is discussed. The experimental results show that the adsorption/desorption behaviors of 241Am(Ⅲ) in Na-montmorillonite colloid and/or quartz sand strongly are influenced by the pH value and ionic strength of a solution, the colloid concentration as well as quartz sand grain size. The adsorption and desorption isotherms within all the experimental conditions could be well-fitted by the Freundlich model and the correlation coefficients (R2) are bigger than 0.9. With the increase in pH, the adsorption partition coefficient (Kd) at 241Am(Ⅲ)-Na-montmorillonite colloid two-phase system and 241Am(Ⅲ)-Na-montmorillonite colloid-quartz sand three-phase system presents a trend which increases firstly followed by decreasing, due to the changes in the morphology of Am with pH. The Kd of 241Am(Ⅲ) adsorption on montmorillonite colloid and quartz sand decreases with increasing in ionic strength, which is mainly attributed to the competitive adsorption, surface complexation and the reduction of surface zeta potential. Additionally, the Kd increases with increasing colloid concentrations because of the increase in adsorption sites. When the mean grain diameter changes from 0.45 to 0.3 mm, the adsorption variation trends of 241Am(Ⅲ) remain basically unchanged. The research results obtained in this work are meaningful and helpful in understanding the migration behaviors of radionuclides in the underground environment.
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Affiliation(s)
- Linlin Zhang
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, China
| | - Ling Li
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, China
| | - Ke Chen
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, China
| | - Qiulan Zhang
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, China
| | - Jingli Shao
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, China
| | - Yali Cui
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, China
| | - Jun Zhu
- Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences, Beijing, China; China Institute for Radiation Protection, Taiyuan, China.
| | - Aiming Zhang
- China Institute for Radiation Protection, Taiyuan, China
| | - Song Yang
- China Institute for Radiation Protection, Taiyuan, China
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2
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Cai F, Ma F, Zhang X, Reimus P, Qi L, Wang Y, Lu D, Thanh HV, Dai Z. Investigating the influence of bentonite colloids on strontium sorption in granite under various hydrogeochemical conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 900:165819. [PMID: 37506897 DOI: 10.1016/j.scitotenv.2023.165819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 07/08/2023] [Accepted: 07/24/2023] [Indexed: 07/30/2023]
Abstract
The disposal of high-level radioactive waste in deep geological repositories is a critical environmental issue. The presence of bentonite colloids generated in the engineering barrier can significantly impact the transport of radionuclides, but their effect on radionuclide sorption in granite remains poorly understood. This study aimed to investigate the sorption characteristics of strontium (Sr) on granite as well as on the coexistence system of granite and colloids under various hydrogeochemical conditions, through batch experiments. Fourier transform infrared spectroscopy was employed to analyze the sorption forms of Sr on granite before and after sorption. Several hydrogeochemical factors were examined, including contact time, pH, ionic strength, coexisting ions, and bentonite and humic acid colloid concentration. Among these factors, the concentration of bentonite colloids exhibited a significant effect on Sr sorption. Within a specific range of colloid concentration, the sorption of Sr on the solid system increased linearly with the bentonite colloid concentration. pH and ionic strength were also found to play crucial roles in the sorption process. At low pH, Sr sorption primarily occurred through the outer sphere's surface complexation and Na+/H+ ion exchange. However, at high pH, inner sphere surface complexation dominated the process. As the ionic strength increased, electrostatic repulsion gradually increased, resulting in fewer binding sites for particle aggregation and Sr sorption on bentonite colloids. The results also indicate that with increasing pH, the predominant forms of Sr in the solution transitioned from SrHCO3+ and SrCl+ to SrCO3 and SrCl+. This was mainly due to the ion exchange of Ca2+/Mg2+ in plagioclase and biotite, forming SrCO3 precipitation. These findings provide valuable insights into the transport behavior of radionuclides in the subsurface environment of the repository and highlight the importance of considering bentonite colloids and other hydrogeochemical factors when assessing the environmental impact of high-level radioactive waste disposal.
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Affiliation(s)
- Fangfei Cai
- College of Construction Engineering, Jilin University, Changchun 130026, China
| | - Funing Ma
- College of Construction Engineering, Jilin University, Changchun 130026, China.
| | - Xiaoying Zhang
- College of Construction Engineering, Jilin University, Changchun 130026, China.
| | - Paul Reimus
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Linlin Qi
- College of Construction Engineering, Jilin University, Changchun 130026, China
| | - Yu Wang
- Institute of Nuclear and New Technology, Tsinghua University, Beijing 100084, China
| | - Di Lu
- Yantai Customs Technology Center, Yantai 264000, China
| | - Hung Vo Thanh
- Laboratory for Computational Mechanics, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Viet Nam; MEU Research Unit, Middle East University, Amman, Jordan
| | - Zhenxue Dai
- College of Construction Engineering, Jilin University, Changchun 130026, China
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3
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Zuo R, Xu Z, Wang X, Yang J, Du X, Du C, Cai W, Xu Y, Wu Z. Adsorption characteristics of strontium by bentonite colloids acting on claystone of candidate high-level radioactive waste geological disposal sites. ENVIRONMENTAL RESEARCH 2022; 213:113633. [PMID: 35700766 DOI: 10.1016/j.envres.2022.113633] [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: 03/13/2022] [Revised: 05/30/2022] [Accepted: 06/05/2022] [Indexed: 06/15/2023]
Abstract
The bentonite colloid produced in the deep geological repository of high-level radioactive waste can directly affect the migration of radionuclide strontium when it acts on claystone. The adsorption characteristics of strontium were investigated on claystone with the presence or absence of bentonite colloids from the Suhongtu area of China. The effects of different influencing factors, such as pH and solid content, on the adsorption process were investigated by batch adsorption experiments, and spectroscopic techniques were used to characterize the samples before and after adsorption of strontium. The results show that the presence of bentonite colloids can promote the adsorption of strontium on claystone under alkaline conditions. and the general order kinetic model provided the best fit to the experimental data. Strontium is adsorbed on the surface of claystone and bentonite colloid by ion exchange and surface complexation. Most of the Sr2+ formed SrCO3 with CO32- after ion exchange with Ca2+ and Mg2+ in plagioclase and dolomite, and a small amount of Sr2+ was adsorbed by complexation with -OH, Al-O and Si-O. These results provide a scientific basis for predicting the migration of strontium in subsurface porous media and the siting of high-level radioactive waste repositories.
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Affiliation(s)
- Rui Zuo
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
| | - Zuorong Xu
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
| | - Xin Wang
- Jinan Rail Transit Group Co., Ltd., Jinan, 250000, China
| | - Jie Yang
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China.
| | - Xiaofeng Du
- Shandong Rail Transit Engineering Consulting Co., Ltd., Jinan, 250000, China
| | - Can Du
- Development and Research Center, China Geological Survey, Beijing, 100037, China
| | - Weihai Cai
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
| | - Yunxiang Xu
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
| | - Ziyi Wu
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
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4
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Wang Y, Jiang Q, Yang Y, Cheng J, Bao C, Pan Y, Liu Y, Yang G, Leng Y, Tuo X. Adsorption Properties of Cs(I) and Co(II) on GMZ Bentonite Colloids. NUCL TECHNOL 2022. [DOI: 10.1080/00295450.2022.2083749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Yanhui Wang
- Chengdu University of Technology, Nuclear Technology Automation Process Academy, Chengdu 610059, Sichuan, China
| | - Qiao Jiang
- Chengdu University of Technology, Nuclear Technology Automation Process Academy, Chengdu 610059, Sichuan, China
| | - Yexin Yang
- Chengdu University of Technology, Nuclear Technology Automation Process Academy, Chengdu 610059, Sichuan, China
| | - Jianfeng Cheng
- Chengdu University of Technology, Nuclear Technology Automation Process Academy, Chengdu 610059, Sichuan, China
| | - Chenyang Bao
- Southwest University of Science and Technology, School of National Defense Science and Technology, Mianyang 621000, Sichuan, China
| | - Yuelong Pan
- China Nuclear Power Engineering Co Ltd, Shenzhen 518124, Guandong, China
| | - Yu Liu
- China Nuclear Power Engineering Co Ltd, Shenzhen 518124, Guandong, China
| | - Gang Yang
- Chengdu University of Technology, Nuclear Technology Automation Process Academy, Chengdu 610059, Sichuan, China
| | - Yangchun Leng
- Southwest University of Science and Technology, School of National Defense Science and Technology, Mianyang 621000, Sichuan, China
| | - Xianguo Tuo
- Chengdu University of Technology, Nuclear Technology Automation Process Academy, Chengdu 610059, Sichuan, China
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5
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Wang C, Myshkin VF, Khan VA, Panamareva AN. A review of the migration of radioactive elements in clay minerals in the context of nuclear waste storage. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08394-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Li Y, Guo N, Xian D, Zhou W, Shi Y, Wang J, Chen Y, Liu C. Bentonite colloids immobilization and release in quartz column and its influence on selenite migration. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 820:152833. [PMID: 35007589 DOI: 10.1016/j.scitotenv.2021.152833] [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: 08/04/2021] [Revised: 12/08/2021] [Accepted: 12/28/2021] [Indexed: 06/14/2023]
Abstract
Immobilization and release of colloids are important for colloids-facilitated migrations, and in the safety assessment of geological disposal for high-level radioactive waste, the association between the immobilization and release process of the bentonite colloids with selenite migration has not been well revealed. In this work, the migration of bentonite colloids under different conditions is evaluated, and the effects of colloids immobilization and release on selenite migration are studied. In addition, the cases of in-migration (colloids are immobilized in the quartz sand, and then selenite migrates through the quartz sand with immobilized colloids) and co-migration (colloids bearing selenite are immobilized in the quartz sand) are investigated. The results show that in the systems containing 3.0 mM Mg2+, the mobility of the colloids is highly hindered and the colloids are immobilized in the quartz sand mainly by straining effect. The immobilization of bentonite colloids affects selenite migration differently according to the immobilization process (in-migration or co-migration). A more significant retardation effect is observed in the co-migration process than in-migration due to the additional inner-sphere complexed selenite in the co-migration. The immobilized colloids can be more easily released by alkaline DI-water (pH 11.0) than acidic one (pH 6.0) as a result of the more negative surface charges of the immobilized bentonite colloids. The average size of the released colloids is larger than the initial colloids at the same pH. Selenite is found to be released ahead of colloids in either in- or co-migration process, and part of selenite is discovered migrating with released colloids in co-migration process. Since colloids immobilization and release would influence radionuclides migration, further research about colloids immobilization and release with broad range of pH and ionic strength in the host rock and its influence on the migration of other radionuclides are needed.
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Affiliation(s)
- Yao Li
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry & Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Ning Guo
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry & Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Dongfan Xian
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry & Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Wanqiang Zhou
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry & Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Yanling Shi
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry & Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Jingyi Wang
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry & Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Yawen Chen
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry & Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Chunli Liu
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry & Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
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7
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Study on the release of GMZ bentonite colloids by static multiple light scattering technique. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Neill T, Morris K, Pearce CI, Sherriff NK, Bryan N, Rigby B, Shaw S. Sorption of Strontium to Uraninite and Uranium(IV)-Silicate Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:3090-3097. [PMID: 35226492 PMCID: PMC9098169 DOI: 10.1021/acs.langmuir.1c02927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 02/06/2022] [Indexed: 06/14/2023]
Abstract
Spent nuclear fuel contains both uranium (U) and high yield fission products, including strontium-90 (90Sr), a key radioactive contaminant at nuclear facilities. Both U and 90Sr will be present where spent nuclear fuel has been processed, including in storage ponds and tanks. However, the interactions between Sr and U phases under ambient conditions are not well understood. Over a pH range of 4-14, we investigate Sr sorption behavior in contact with two nuclear fuel cycle relevant U(IV) phases: nano-uraninite (UO2) and U(IV)-silicate nanoparticles. Nano-UO2 is a product of the anaerobic corrosion of metallic uranium fuel, and UO2 is also the predominant form of U in ceramic fuels. U(IV)-silicates form stable colloids under the neutral to alkaline pH conditions highly relevant to nuclear fuel storage ponds and geodisposal scenarios. In sorption experiments, Sr had the highest affinity for UO2, although significant Sr sorption also occurred to U(IV)-silicate phases at pH ≥ 6. Extended X-ray absorption fine structure (EXAFS) spectroscopy, transmission electron microscopy, and desorption data for the UO2 system suggested that Sr interacted with UO2 via a near surface, highly coordinated complex at pH ≥ 10. EXAFS measurements for the U(IV)-silicate samples showed outer-sphere Sr sorption dominated at acidic and near-neutral pH with intrinsic Sr-silicates forming at pH ≥ 12. These complex interactions of Sr with important U(IV) phases highlight a largely unrecognized control on 90Sr mobility in environments of relevance to spent nuclear fuel management and storage.
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Affiliation(s)
- Thomas
S. Neill
- Research
Centre for Radwaste Disposal and Williamson Research Centre, School
of Earth & Environmental Sciences, The
University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Katherine Morris
- Research
Centre for Radwaste Disposal and Williamson Research Centre, School
of Earth & Environmental Sciences, The
University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Carolyn I. Pearce
- Pacific
Northwest National Laboratory, Richland, Washington 99354, United States
| | - Nicholas K. Sherriff
- National
Nuclear Laboratory, Chadwick
House, Warrington Road, Birchwood Park, Warrington WA3 6AE, U.K.
| | - Nick Bryan
- National
Nuclear Laboratory, Chadwick
House, Warrington Road, Birchwood Park, Warrington WA3 6AE, U.K.
| | - Bruce Rigby
- Sellafield
Ltd., Hinton House, Birchwood Park Avenue, Risley, Warrington, Cheshire WA3
6GR, U.K.
| | - Samuel Shaw
- Research
Centre for Radwaste Disposal and Williamson Research Centre, School
of Earth & Environmental Sciences, The
University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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Zhang Z, Heng J, Jin Q, Chen Z, Wu W, Guo Z. Co-transport of bentonite colloid and U(VI) in particulate granite column: role of colloid concentration, ionic strength, pH and flow rate. RADIOCHIM ACTA 2022. [DOI: 10.1515/ract-2021-1096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
China is considering Beishan granitic formation (Gansu Province, China) as the site for high-level radioactive waste (HLW) repositories. Thus, it is crucial to understand the transport behavior of radionuclide in Beishan granitic media under disposal conditions. In this context, the co-transport of U(VI) (as the representative of radionuclides) and bentonite colloid (BC, from erosion of compacted bentonite) in particulate Beishan granite was studied as a function of important in-situ factors, such as BC concentration, ionic strength, pH and flow rate. We found that the increase of BC concentration (BC = 240–480 mg/L) did not affect the transport of individual BC, whereas it significantly facilitated the transport of U(VI). The increase of ionic strength (I = 0.001–0.01 M NaCl) or decrease of pH (pH = 7.50–5.40) obviously inhibited the BC transport, where these inhibiting effects were relatively slight for the transport of U(VI). The increase of flow rate significantly facilitated both the transport of BC and U(VI). Finally, a two-site kinetic attachment/detachment model was applied to describe the breakthrough curves of individual and co-transport of BC. The experimental and modeling results of this study have a significant implication on the safety assessment of HLW repositories built in granitic formation.
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Affiliation(s)
- Zhen Zhang
- Radiochemistry Laboratory , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P. R. China
| | - Jiaxi Heng
- Radiochemistry Laboratory , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P. R. China
| | - Qiang Jin
- Frontiers Science Center for Rare Isotopes , Lanzhou University , 730000 Lanzhou , P. R. China
- Radiochemistry Laboratory , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P. R. China
- The Key Laboratory of Special Function Materials and Structure Design , Ministry of Education, Lanzhou University , 730000 Lanzhou , P. R. China
| | - Zongyuan Chen
- Frontiers Science Center for Rare Isotopes , Lanzhou University , 730000 Lanzhou , P. R. China
- Radiochemistry Laboratory , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P. R. China
- The Key Laboratory of Special Function Materials and Structure Design , Ministry of Education, Lanzhou University , 730000 Lanzhou , P. R. China
| | - Wangsuo Wu
- Frontiers Science Center for Rare Isotopes , Lanzhou University , 730000 Lanzhou , P. R. China
- Radiochemistry Laboratory , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P. R. China
- The Key Laboratory of Special Function Materials and Structure Design , Ministry of Education, Lanzhou University , 730000 Lanzhou , P. R. China
| | - Zhijun Guo
- Frontiers Science Center for Rare Isotopes , Lanzhou University , 730000 Lanzhou , P. R. China
- Radiochemistry Laboratory , School of Nuclear Science and Technology, Lanzhou University , 730000 Lanzhou , P. R. China
- The Key Laboratory of Special Function Materials and Structure Design , Ministry of Education, Lanzhou University , 730000 Lanzhou , P. R. China
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10
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Xu Z, Niu Z, Pan D, Zhao X, Wei X, Li X, Tan Z, Chen X, Liu C, Wu W. Mechanisms of bentonite colloid aggregation, retention, and release in saturated porous media: Role of counter ions and humic acid. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 793:148545. [PMID: 34328966 DOI: 10.1016/j.scitotenv.2021.148545] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 06/13/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
In the subsurface environment, colloids play an important role in pollutant transport by acting as the carriers. Understanding colloid release, transport, and deposition in porous media is a prerequisite for evaluating the potential role of colloids in subsurface contaminant transport. In this work, the aggregation, retention, and release of bentonite colloid in saturated porous sand media were investigated by kinetic aggregation and column experiments, the correlation and mechanism of these processes were revealed by combining colloid filtration theory, interaction energy calculation and density functional theory. The results showed that the retention and release of colloids were closely related to the dispersion stability and filtration effect. Multivalent cations with higher mineral affinity reduced the colloid stability, and the dispersion stability and mobility of the colloid were greatly improved by humic acid due to the enhancement of electrostatic repulsion and steric hindrance effects. The primary minimum interaction was found to contribute more to irreversible colloid retention in a Ca2+ system, while the secondary energy minimum was found to be responsible for colloid release with the occurrence of transient solution chemistry. The deposited colloid aggregates could be redistributed and released when the solution chemistry became favorable towards dispersion. These findings provide essential insight into the environmental colloid fate as well as a vital reference for the risk of colloid-driven transport of contaminants in the subsurface aquifer environment.
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Affiliation(s)
- Zhen Xu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Zhiwei Niu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Duoqiang Pan
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China.
| | - Xiaodong Zhao
- Department of Chemistry, Washington State University, Pullman, WA 99164, United States
| | - Xiaoyan Wei
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Xiaolong Li
- China Academy of Engineering Physics, Mianyang 621000, China
| | - Zhaoyi Tan
- China Academy of Engineering Physics, Mianyang 621000, China
| | - Ximeng Chen
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Chunli Liu
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry and Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Wangsuo Wu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China
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11
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Xu Z, Niu Z, Tang Q, Wei X, Chen X, Pan D, Wu W. Adsorption characteristics of Eu(III) on colloidal bentonite particles in aqueous solution: impact of colloid concentration, pH, foreign ions, and temperature. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07976-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Kusaka R, Watanabe M. Application of photoluminescence microspectroscopy: a study on transfer of uranyl and europium ions on dry silica gel plate. J NUCL SCI TECHNOL 2020. [DOI: 10.1080/00223131.2020.1755734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Ryoji Kusaka
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency (JAEA), Tokai, Japan
| | - Masayuki Watanabe
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency (JAEA), Tokai, Japan
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13
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14
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15
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Zang J, Wang J, Han X, Yao H, Fu B, Zhao J, Li B, Chen J. Sorption and desorption of Sr onto a rough single fractured granite. JOURNAL OF CONTAMINANT HYDROLOGY 2020; 228:103558. [PMID: 31740008 DOI: 10.1016/j.jconhyd.2019.103558] [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: 03/18/2019] [Revised: 08/24/2019] [Accepted: 09/29/2019] [Indexed: 06/10/2023]
Abstract
To investigate the migration behavior of Sr (strontium) in granite, a rough-walled single fracture of granite was prepared with the self-built rock splitting apparatus. Surface roughness angle and hydraulic aperture of the fracture were measured by 3D laser scanning and fluid flow experiment, respectively. The sorption and desorption breakthrough experiments of Sr in the single fracture were conducted at different flow rates and initial concentrates of Sr, and the important transport parameters were derived by fitting the BTCs and DPCs. The results suggested that the sorption of Sr onto the fracture surface was a linear and reversible ion-exchange process, unaffected by the variation of flow rate and initial concentrate of Sr.
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Affiliation(s)
- Jianzheng Zang
- Northwest Institute of Nuclear Technology, Xi'an City, Shaanxi Province 710024, China.
| | - Jinlong Wang
- Northwest Institute of Nuclear Technology, Xi'an City, Shaanxi Province 710024, China
| | - Xiaoyuan Han
- Northwest Institute of Nuclear Technology, Xi'an City, Shaanxi Province 710024, China
| | - Haibo Yao
- Northwest Institute of Nuclear Technology, Xi'an City, Shaanxi Province 710024, China
| | - Baofeng Fu
- Northwest Institute of Nuclear Technology, Xi'an City, Shaanxi Province 710024, China
| | - Jian Zhao
- Northwest Institute of Nuclear Technology, Xi'an City, Shaanxi Province 710024, China
| | - Bo Li
- Northwest Institute of Nuclear Technology, Xi'an City, Shaanxi Province 710024, China
| | - Jie Chen
- Northwest Institute of Nuclear Technology, Xi'an City, Shaanxi Province 710024, China
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Zuo R, Chen M, Lin Y, Yang J, Jin S, Yue W, Wang J, Teng Y. Effect of a humic acid colloid on the sorption behaviour of Sr onto soil in a candidate high-level radioactive waste geological disposal site. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:25235-25246. [PMID: 31256394 DOI: 10.1007/s11356-019-05545-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 05/21/2019] [Indexed: 06/09/2023]
Abstract
We explored the effect of the presence or absence of humic acid (HA) on the sorption behaviour of Sr onto soil. We examined three different experimental cases for Sr sorption: (1) sorption in the presence of only colloidal HA, (2) sorption in the presence of only soil and (3) sorption in the presence of both colloidal HA and soil (HS). A batch technique was used to study the influencing factors, including the amount of colloidal HA, solid content, pH, initial concentration of Sr and contact time. The experiments showed that the influencing factors significantly affected the sorption process. For example, in the case of soil and HS, the sorption percentage increased rapidly with increasing solid content at m/V < 20 g/L, changing from 8.35% and 37.54% to 49.09% and 77.03%, respectively. Moreover, scanning electron microscopy and Fourier transform infrared spectroscopy were used to characterize samples. The kinetics and isotherms of Sr were best described by the pseudo-second-order and Langmuir models, which indicated that the process was controlled by chemisorption and uniform monolayer sorption with constant energy on the outer surface. These findings provide valuable information for predicting strontium migration in radioactive waste disposal sites.
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Affiliation(s)
- Rui Zuo
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China
- Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
| | - Minhua Chen
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China
- Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
| | - Yuanhui Lin
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China
- Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
| | - Jie Yang
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China
- Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
| | - Shuhe Jin
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China
- Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
| | - Weifeng Yue
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China
- Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
| | - Jinsheng Wang
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China
- Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China
| | - Yanguo Teng
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China.
- Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing, 100875, China.
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Videnská K, Gondolli J, Štamberg K, Havlová V. Retention of selenium and caesium on crystalline rock: the effect of redox conditions and mineralogical composition. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-014-3885-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Albarran N, Missana T, Alonso U, García-Gutiérrez M, López T. Analysis of latex, gold and smectite colloid transport and retention in artificial fractures in crystalline rock. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.02.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Jović-Jovičić NP, Milutinović-Nikolić AD, Zunić MJ, Mojović ZD, Banković PT, Gržetić IA, Jovanović DM. Synergic adsorption of Pb2+ and reactive dye--RB5 on two series of organomodified bentonites. JOURNAL OF CONTAMINANT HYDROLOGY 2013; 150:1-11. [PMID: 23624568 DOI: 10.1016/j.jconhyd.2013.03.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 03/14/2013] [Accepted: 03/18/2013] [Indexed: 06/02/2023]
Abstract
Two series of organobentonites (OBs) were synthesized from Na(+)-exchanged bentonite clay from Bogovina, Serbia. In the first series the starting material was modified using hexadecyltrimethylammonium (HDTMA(+)) ion in the amounts corresponding to 0.2, 0.5, 1.0 and 2.0 of the CEC value. The second series was obtained using quaternary alkyl ammonium cations (QAACs) with different alkyl chain lengths: hexadecyltrimethylammonium (HDTMA(+)), dodecyltrimethylammonium (DDTMA(+)) and tetramethylammonium (TMA(+)) ions. The synthesized OBs were characterized. The adsorption of anionic reactive dye Reactive Black 5 (RB5) and Pb(2+) from single component solutions and their bi-component solution was investigated for both series of OBs. The adsorptive properties of the OBs were correlated to the amount and type of incorporated QAACs. The correlation was tested using different mathematical models and best fits were found. Experimental results showed that simultaneous adsorption of RB5 and Pb(2+) exhibited synergic effect. The adsorption capacity for both RB5 and Pb(2+) was higher in their bi-component solution than in single-component solutions. These results indicate the creation of new adsorption sites during the simultaneous adsorption.
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Affiliation(s)
- N P Jović-Jovičić
- University of Belgrade, Institute of Chemistry, Technology and Metallurgy, Department of Catalysis and Chemical Engineering, Njegoševa 12, 11000 Belgrade, Serbia.
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