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Rana D, Jha V, Patnaik RL, Singh MK, Jha SK, Kulkarni MS. A numerical model for the prediction of radon flux from uranium mill tailings at Jaduguda, India. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:24951-24960. [PMID: 38460038 DOI: 10.1007/s11356-024-32674-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 02/23/2024] [Indexed: 03/11/2024]
Abstract
Solid process fine waste or tailings of a uranium mill is a potential source of release of radiologically significant gaseous radon (222Rn). A number of variables such as radium (226Ra) content, porosity, moisture content, and tailings density can affect the extent of emanation from the tailings. Further, if a cover material is used for remediation purposes, additional challenges due to changes in the matrix characteristics in predicting the radon flux can be anticipated. The uranium mill tailings impoundment systems at Jaduguda have been in use for the long-term storage of fine process waste (tailings). A pilot-scale remediation exercise of one of the tailings ponds has been undertaken with 30 cm soil as a cover material. For the prediction of the radon flux, a numerical model has been developed to account for the radon exhalation process at the remediated site. The model can effectively be used to accommodate both the continuous and discrete variable inputs. Depth profiling and physicochemical characterization for the remediated site have been done for the required input variables of the proposed numerical model. The predicted flux worked out is well below the reference level of 0.74 Bq m-2 s-1 IAEA (2004).
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Affiliation(s)
- Dibyendu Rana
- Health Physics Unit, Bhabha Atomic Research Centre, Jaduguda, 832102, Jharkhand, India.
- Health Physics Division, Bhabha Atomic Research Centre, Trombay, 400094, Maharastra, India.
| | - Vivekanand Jha
- Health Physics Unit, Bhabha Atomic Research Centre, Jaduguda, 832102, Jharkhand, India
- Health Physics Division, Bhabha Atomic Research Centre, Trombay, 400094, Maharastra, India
| | - RLokeswara Patnaik
- Health Physics Unit, Bhabha Atomic Research Centre, Jaduguda, 832102, Jharkhand, India
- Health Physics Division, Bhabha Atomic Research Centre, Trombay, 400094, Maharastra, India
| | - Manish Kumar Singh
- Health Physics Unit, Bhabha Atomic Research Centre, Jaduguda, 832102, Jharkhand, India
- Health Physics Division, Bhabha Atomic Research Centre, Trombay, 400094, Maharastra, India
| | - Sanjay Kumar Jha
- Health Physics Division, Bhabha Atomic Research Centre, Trombay, 400094, Maharastra, India
| | - Mukund S Kulkarni
- Health Physics Division, Bhabha Atomic Research Centre, Trombay, 400094, Maharastra, India
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Li W, Deng Y, Wang H, Hu Y, Cheng H. Potential risk, leaching behavior and mechanism of heavy metals from mine tailings under acid rain. CHEMOSPHERE 2024; 350:140995. [PMID: 38128738 DOI: 10.1016/j.chemosphere.2023.140995] [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: 11/01/2023] [Revised: 12/13/2023] [Accepted: 12/18/2023] [Indexed: 12/23/2023]
Abstract
The leaching of heavy metals from abandoned mine tailings can pose a severe threat to surrounding areas, especially in the regions influenced by acid rain with high frequency. In this study, the potential risks of heavy metals in the tailings collected from a small-scale abandoned multi-metal mine was assessed, and their leaching behavior and mechanism were investigated by batch, semi-dynamic and in situ leaching experiments under simulated and natural rainfall conditions. The results suggested that Zn, Cu, Pb, and Cd in the tailings could cause high/very high risks. Both batch and semi-dynamic leaching tests consistently confirmed that the leaching of heavy metals (particularly Cd) could lead to serious pollution of the surrounding environment. The leaching rates of heavy metals were pH-dependent and related to their chemical speciations in the mine tailings. The leaching behavior of Cu and Cd was dominated by surface wash-off, Zn was controlled by diffusion initially and then surface wash-off, and the leaching mechanisms of Pb and As varied with the pH conditions. It was estimated that acid rain could greatly elevate the release fluxes of Zn (20.8%), Cu (36.7%), Pb (49.9%) and Cd (35.3%) in the study area. These findings could improve the understanding of the leaching behavior of heavy metals from mine tailings and assist in developing appropriate management strategies.
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Affiliation(s)
- Wei Li
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Yu Deng
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Hao Wang
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Yuanan Hu
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China.
| | - Hefa Cheng
- MOE Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China
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Ma Q, Lei J, He J, Chen Z, Li W. Epoxy resin for solidification/stabilization of soil contaminated with copper (II): Leaching, mechanical, and microstructural characterization. ENVIRONMENTAL RESEARCH 2024; 240:117512. [PMID: 37914008 DOI: 10.1016/j.envres.2023.117512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 10/20/2023] [Accepted: 10/24/2023] [Indexed: 11/03/2023]
Abstract
Among different types of heavy metal-contaminated soil, copper (Cu)-contaminated soil is very serious, and the Cu concentration in it is usually very high. It is common to solidify/stabilize Cu-contaminated soil using alkaline cementitious material. However, the remediated Cu-contaminated soil fails to meet the requirements of environmental safety and load-bearing capacity. This dilemma in the remediation of Cu-contaminated soil hinders the effective utilization of land resources. In this study, epoxy resin (EP) was utilized to solidify/stabilize Cu-contaminated soil due to its stable and rapid curing performance and excellent resistance to acid, alkali, and salt erosion. The mechanical properties, environmental effects, and curing mechanism of EP-cured Cu-contaminated soil were investigated. The results showed that the application of EP significantly enhanced the unconfined compressive strength (UCS), cohesion and internal friction angle of Cu-contaminated soil. All specimens met the UCS criterion specified by the United States Environmental Protection Agency (USPEA), namely no less than 0.35 MPa, which indicated that those EP-cured Cu-contaminated soil were qualified for practical engineering applications. According to the toxicity characteristic leaching procedure (TCLP), the application of EP enhanced the stability of Cu in Cu-contaminated soil. The leaching index of Cu ranged from 11 to 14. A high leaching index showed that the S/S treatment was safe and effective and the remediated Cu-contaminated soil satisfied the environmental requirement for heavy metals. This study confirmed the feasibility of utilizing EP in the solidification/stabilization (S/S) technology to convert high-concentration Cu-contaminated soil into secure and stable engineering materials. The remediation of Cu-contaminated soil by EP lays a solid foundation for the safe treatment and reuse of heavy metal-contaminated land resources.
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Affiliation(s)
- Qiang Ma
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, China; Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan, 430068, China.
| | - Jingjie Lei
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, China; Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan, 430068, China.
| | - Jun He
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, China; Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan, 430068, China.
| | - Zhi Chen
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, China; Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan, 430068, China.
| | - Wentao Li
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, China; Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan, 430068, China.
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Reymond M, Descostes M, Besançon C, Leermakers M, Billon S, Cherfallot G, Muguet M, Beaucaire C, Smolikova V, Patrier P. Assessment of 226Ra and U colloidal transport in a mining environment. CHEMOSPHERE 2023; 338:139497. [PMID: 37451635 DOI: 10.1016/j.chemosphere.2023.139497] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 07/05/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
The colloidal transport of trace (Fe, Al, Ba, Pb, Sr, U) and ultra-trace (226Ra) elements was studied in a mining environment. An original approach combining 0.45 μm filtered water sampling, the Diffusive Gradient in Thin films (DGT) technique, mineralogical characterization, and geochemical modelling was developed and tested at 17 sampling points. DGT was used for the truly dissolved fraction of the elements of interest, while the 0.45 μm filtration includes both colloidal and truly dissolved fractions (together referred to as total dissolved fraction). Results indicated a colloidal fraction for Al (up to 50%), Ba (up to 86%), and Fe (up to 99%) explained by the presence of submicrometric grains of kaolinite, barite, and ferrihydrite, respectively. Furthermore, the total dissolved 226Ra concentration in the water samples reached up to 10-25 Bq/L (1.2-3.0 10-12 mol/L) at 3 sampling points, while the truly dissolved aqueous 226Ra concentrations were in the mBq/L range. Such high total dissolved concentrations are explained by retention on colloidal barite, accounting for 95% of the total dissolved 226Ra concentration. The distribution of 226Ra between the truly dissolved and colloidal fractions was accurately reproduced using a (Rax,Ba1-x)SO4 solid solution, with values of the Guggenheim parameter a0 close to ideality. 226Ra sorption on ferrihydrite and kaolinite, other minerals well known for their retention properties, could not explain the measured colloidal fractions despite their predominance. This illustrates the key role of barite in such environments. The measured concentrations of total dissolved U were very low at all the sampling points (<4.5 10-10 mol/L) and the colloidal fraction of U accounted for less than 65%. U sorption on ferrihydrite could account for the colloidal fraction. This original approach can be applied to other trace and ultra-trace elements to complement when necessary classical environmental surveys usually performed by filtration on 0.45 μm.
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Affiliation(s)
- Marine Reymond
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), UMR 7285, Université de Poitiers, CNRS, HydrASA, F-86073, Poitiers, France
| | - Michael Descostes
- Orano Environmental R&D Dpt, 125 avenue de Paris, 92320, Châtillon, France; Centre de Géosciences, MINES Paris, PSL University, 35 rue St Honoré, 77300, Fontainebleau, France
| | - Clémence Besançon
- Orano Environmental R&D Dpt, 125 avenue de Paris, 92320, Châtillon, France.
| | - Martine Leermakers
- Analytical, Environmental & Geo-Chemistry (AMGC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050, Brussels, Belgium
| | - Sophie Billon
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), UMR 7285, Université de Poitiers, CNRS, HydrASA, F-86073, Poitiers, France
| | - Gaël Cherfallot
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), UMR 7285, Université de Poitiers, CNRS, HydrASA, F-86073, Poitiers, France
| | - Marie Muguet
- Orano Environmental R&D Dpt, 125 avenue de Paris, 92320, Châtillon, France.
| | | | - Vendula Smolikova
- Analytical, Environmental & Geo-Chemistry (AMGC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050, Brussels, Belgium
| | - Patricia Patrier
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), UMR 7285, Université de Poitiers, CNRS, HydrASA, F-86073, Poitiers, France
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Huang B, Liu Z, Wang Y, Zhou L, Wang C, Ye T. Release behavior and mechanism of uranium and thorium from Ta-Nb tailings under simulated rainfall in Jiangxi Province, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:57466-57478. [PMID: 35352230 DOI: 10.1007/s11356-022-19931-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
Tantalum-niobium ore belongs to associated radioactive ore, which is accompanied by a certain amount of radioactive uranium and thorium. The remaining slag is enriched with a large number of radionuclides; after weathering, natural rainfall, and surface water scouring, radioactive elements such as uranium, thorium, and some heavy metal elements are exposed or washed into the soil, which poses a threat to the ecological environment and human health. In this study, for characterization analysis during, before, and after leaching, dynamic simulation experiment was carried out on a Ta-Nb slag sample in Jiangxi, China. From SEM analysis, the soluble substances adsorbed on the slag surface dissolve into the solution after leaching in simulated rainfall, and the remained slag becomes smooth with different particle sizes. The XRD diffraction analysis of the sample showed that after leaching in simulated rainfall, the existing forms of elements are different. pH of the leachate of Ta-Nb slag is 1.79; Ta-Nb slag contains many rare metal elements, nonmetal elements, radioactive elements, and some salt compounds; and the content of thorium is higher than that of uranium by EDS analysis. The release of uranium and thorium is obviously affected by the amount of leachate and pH. Under the lower pH of leaching solution, the release of uranium and thorium is more effective. The results of Fick diffusion theory and Elovich equation show that the release and migration mode of uranium and thorium in Ta-Nb slag are mainly surface elution; under acidic conditions, the release and migration of uranium and thorium are faster. This study provides basic data and scientific information for solving the key problems of pollution control of associated radioactive waste in environmental protection.
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Affiliation(s)
- Bin Huang
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, China
| | - Zhirong Liu
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China.
- School of Chemistry, Biological and Materials Science, East China University of Technology, Nanchang, People's Republic of China.
| | - Yun Wang
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China
| | - Limin Zhou
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China
- School of Chemistry, Biological and Materials Science, East China University of Technology, Nanchang, People's Republic of China
| | - Changfu Wang
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, China
| | - Tianzhen Ye
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China
- School of Chemistry, Biological and Materials Science, East China University of Technology, Nanchang, People's Republic of China
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El-Afandy AH, Yousif AM, Mubark AE. Subsequent Separation of Niobium (Nb), Thorium (Th), Rare Earth Elements (REEs), Zirconium (Zr), and Uranium (U) from Abu Rusheid Cataclastic Concentrate, South Eastern Desert, Egypt. RADIOCHEMISTRY 2022. [DOI: 10.1134/s1066362222020175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zhang WJ, Lin MF. Influence of redox potential on leaching behavior of a solidified chromium contaminated soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 733:139410. [PMID: 32446097 DOI: 10.1016/j.scitotenv.2020.139410] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 05/10/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
Cement-based solidification/stabilization (S/S) technology is often used to remediate chromium (Cr) contaminated soils. The valence state and mobility of Cr in soils are closely related with redox potential (EH). However, Cr mobilization from the solidified soils influenced by EH has received little attention. In this study, semi-dynamic leaching tests and the toxicity characteristic leaching procedure (TCLP) were performed on a S/S treated Cr contaminated soil under various EH conditions. The effective diffusion coefficient and leachability index were obtained from the leaching data to investigate the leaching behavior of Cr from the S/S treated soil. Speciation of Cr remained in the sample after the leaching process was obtained through the sequential extraction procedures. The results show that an increase in EH increases the effective diffusion coefficient of Cr and, therefore, the amount of Cr leached. This result is attributed to immobile Cr(III) being oxidized to highly mobile Cr(VI). The leachability index results indicate that the cement solidification of Cr contaminated soil may not be appropriate under oxidizing conditions. For the TCLP and sequential extraction procedures, the leached amount of Cr exhibits a strong dependence on EH. As EH increases, the content of Cr remaining in the soil in unstable phases reduced, and more Cr was released to leachant.
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Affiliation(s)
- Wen-Jie Zhang
- Department of Civil Engineering, Shanghai University, 200444 Shanghai, China.
| | - Ming-Feng Lin
- Department of Civil Engineering, Shanghai University, 200444 Shanghai, China
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Cuccia V, Freire CB, Ladeira ACQ. Radwaste oil immobilization in geopolymer after non-destructive treatment. PROGRESS IN NUCLEAR ENERGY 2020. [DOI: 10.1016/j.pnucene.2020.103246] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ceballos MR, García-Tenorio R, Estela JM, Cerdà V, Ferrer L. An integrated automatic system to evaluate U and Th dynamic lixiviation from solid matrices, and to extract/pre-concentrate leached analytes previous ICP-MS detection. Talanta 2017; 175:507-513. [PMID: 28842025 DOI: 10.1016/j.talanta.2017.07.061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 07/17/2017] [Accepted: 07/20/2017] [Indexed: 11/19/2022]
Abstract
Leached fractions of U and Th from different environmental solid matrices were evaluated by an automatic system enabling the on-line lixiviation and extraction/pre-concentration of these two elements previous ICP-MS detection. UTEVA resin was used as selective extraction material. Ten leached fraction, using artificial rainwater (pH 5.4) as leaching agent, and a residual fraction were analyzed for each sample, allowing the study of behavior of U and Th in dynamic lixiviation conditions. Multivariate techniques have been employed for the efficient optimization of the independent variables that affect the lixiviation process. The system reached LODs of 0.1 and 0.7ngkg-1 of U and Th, respectively. The method was satisfactorily validated for three solid matrices, by the analysis of a soil reference material (IAEA-375), a certified sediment reference material (BCR- 320R) and a phosphogypsum reference material (MatControl CSN-CIEMAT 2008). Besides, environmental samples were analyzed, showing a similar behavior, i.e. the content of radionuclides decreases with the successive extractions. In all cases, the accumulative leached fraction of U and Th for different solid matrices studied (soil, sediment and phosphogypsum) were extremely low, up to 0.05% and 0.005% of U and Th, respectively. However, a great variability was observed in terms of mass concentration released, e.g. between 44 and 13,967ngUkg-1.
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Affiliation(s)
- Melisa Rodas Ceballos
- Environmental Radioactivity Laboratory (LaboRA), University of the Balearic Islands, 07122 Palma de Mallorca, Spain; Sciware Systems, Spin-Off UIB-004, 07193 Bunyola, Spain
| | - Rafael García-Tenorio
- Dpto. Física Aplicada II, Universidad de Sevilla, ETSA, Avda. Reina Mercedes s/n, 41012 Seville, Spain
| | - José Manuel Estela
- Environmental Analytical Chemistry Laboratory (LQA(2)), University of the Balearic Islands, 07122 Palma de Mallorca, Spain
| | - Víctor Cerdà
- Environmental Analytical Chemistry Laboratory (LQA(2)), University of the Balearic Islands, 07122 Palma de Mallorca, Spain
| | - Laura Ferrer
- Environmental Radioactivity Laboratory (LaboRA), University of the Balearic Islands, 07122 Palma de Mallorca, Spain.
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Liu B, Peng T, Sun H. Leaching behavior of U, Mn, Sr, and Pb from different particle-size fractions of uranium mill tailings. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:15804-15815. [PMID: 28534266 DOI: 10.1007/s11356-017-8921-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Accepted: 03/23/2017] [Indexed: 06/07/2023]
Abstract
Pollution by the release of heavy metals from tailings constitutes a potential threat to the environment. To characterize the processes governing the release of Mn, Sr, Pb, and U from the uranium mill tailings, a dynamic leaching test was applied for different size of uranium mill tailings samples. Inductively coupled plasma atomic emission spectroscopy (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS) were performed to determine the content of Mn, Sr, Pb, and U in the leachates. The release of mobile Mn, Sr, Pb, and U fraction was slow, being faster in the initial stage and then attained a near steady-state condition. The experimental results demonstrate that the release of Mn, Sr, Pb, and U from uranium mill tailings with different size fractions is controlled by a variety of mechanisms. Surface wash-off is the release mechanism for Mn. The main release mechanism of Sr and Pb is the dissolution in the initial leaching stage. For U, a mixed process of wash-off and diffusion is the controlling mechanism.
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Affiliation(s)
- Bo Liu
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, People's Republic of China
- Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Ministry of Education, Mianyang, 621010, Sichuan, People's Republic of China
| | - Tongjiang Peng
- Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Ministry of Education, Mianyang, 621010, Sichuan, People's Republic of China.
| | - Hongjuan Sun
- Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Ministry of Education, Mianyang, 621010, Sichuan, People's Republic of China
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11
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Zhang W, Wang J. Leaching performance of uranium from the cement solidified matrices containing spent radioactive organic solvent. ANN NUCL ENERGY 2017. [DOI: 10.1016/j.anucene.2016.09.055] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Kumar A, Rout S, Pandey M, Mishra DG, Mishra MK, Ravi PM, Tripathi RM. Understanding and modeling of the vertical downward migration of 238U within the soil profile of south-western (SW) Punjab, India. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-015-4549-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Zhu R, Ma G, Cai Y, Chen Y, Yang T, Duan B, Xue Z. Ceramic tiles with black pigment made from stainless steel plant dust: Physical properties and long-term leaching behavior of heavy metals. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (1995) 2016; 66:402-411. [PMID: 26757095 DOI: 10.1080/10962247.2016.1140096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
UNLABELLED Stainless steel plant dust is a hazardous by-product of the stainless steelmaking industry. It contains large amounts of Fe, Cr, and Ni, and can be potentially recycled as a raw material of inorganic black pigment in the ceramic industry to reduce environmental contamination and produce value-added products. In this paper, ceramic tiles prepared with black pigment through recycling of stainless steel plant dust were characterized in terms of physical properties, such as bulk density, water absorption, apparent porosity, and volume shrinkage ratio, as well as the long-term leaching behavior of heavy metals (Cr, Ni, Pb, Cd, and Zn). The results show that good physical properties of ceramic tiles can be obtained with 8% pigments addition, sample preparation pressure of 25 MPa, and sintering at 1200 ºC for 30 min. The major controlling leaching mechanism for Cr and Pb from the ceramic tiles is initial surface wash-off, while the leaching behavior of Cd, Ni, and Zn from the stabilized product is mainly controlled by matrix diffusion. The reutilization process is safe and effective to immobilize the heavy metals in the stainless steel plant dust. IMPLICATIONS Stainless steel plant dust is considered as a hazardous material, and it can be potentially recycled for black pigment preparation in the ceramic industry. This paper provides the characteristics of the ceramic tiles with black pigment through recycling stainless steel plant dust, and the long-term leaching behavior and controlling leaching mechanisms of heavy metals from the ceramic tile. The effectiveness of the treatment process is also evaluated.
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Affiliation(s)
- Renbo Zhu
- a State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan , People's Republic of China
| | - Guojun Ma
- a State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan , People's Republic of China
| | - Yongsheng Cai
- a State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan , People's Republic of China
| | - Yuxiang Chen
- a State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan , People's Republic of China
| | - Tong Yang
- a State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan , People's Republic of China
| | - Boyu Duan
- a State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan , People's Republic of China
| | - Zhengliang Xue
- a State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan , People's Republic of China
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Saleh MA, Ramli AT, bin Hamzah K, Alajerami Y, Mhareb MHA, Aliyu AS, Hanifah NZHBA. Natural environmental radioactivity and the corresponding health risk in Johor Bahru District, Johor, Malaysia. J Radioanal Nucl Chem 2014. [DOI: 10.1007/s10967-014-3631-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Caetano AL, Marques CR, Gavina A, Carvalho F, Gonçalves F, da Silva EF, Pereira R. Contribution for the derivation of a soil screening value (SSV) for uranium, using a natural reference soil. PLoS One 2014; 9:e108041. [PMID: 25353962 PMCID: PMC4212963 DOI: 10.1371/journal.pone.0108041] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 08/25/2014] [Indexed: 11/19/2022] Open
Abstract
In order to regulate the management of contaminated land, many countries have been deriving soil screening values (SSV). However, the ecotoxicological data available for uranium is still insufficient and incapable to generate SSVs for European soils. In this sense, and so as to make up for this shortcoming, a battery of ecotoxicological assays focusing on soil functions and organisms, and a wide range of endpoints was carried out, using a natural soil artificially spiked with uranium. In terrestrial ecotoxicology, it is widely recognized that soils have different properties that can influence the bioavailability and the toxicity of chemicals. In this context, SSVs derived for artificial soils or for other types of natural soils, may lead to unfeasible environmental risk assessment. Hence, the use of natural regional representative soils is of great importance in the derivation of SSVs. A Portuguese natural reference soil PTRS1, from a granitic region, was thereby applied as test substrate. This study allowed the determination of NOEC, LOEC, EC20 and EC50 values for uranium. Dehydrogenase and urease enzymes displayed the lowest values (34.9 and <134.5 mg U Kg, respectively). Eisenia andrei and Enchytraeus crypticus revealed to be more sensitive to uranium than Folsomia candida. EC50 values of 631.00, 518.65 and 851.64 mg U Kg were recorded for the three species, respectively. Concerning plants, only Lactuca sativa was affected by U at concentrations up to 1000 mg U kg1. The outcomes of the study may in part be constrained by physical and chemical characteristics of soils, hence contributing to the discrepancy between the toxicity data generated in this study and that available in the literature. Following the assessment factor method, a predicted no effect concentration (PNEC) value of 15.5 mg kg−1dw was obtained for U. This PNEC value is proposed as a SSV for soils similar to the PTRS1.
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Affiliation(s)
- Ana Luisa Caetano
- Department of Biology, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
- CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
- * E-mail:
| | - Catarina R. Marques
- Department of Biology, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
- CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Ana Gavina
- CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - Fernando Carvalho
- Nuclear and Technological Institute (ITN) Department of Radiological Protection and Nuclear Safety, Sacavém, Portugal
| | - Fernando Gonçalves
- Department of Biology, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
- CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Eduardo Ferreira da Silva
- Department of Geosciences, University of Aveiro, GeoBioTec Research Center, Campus Universitário de Santiago, Aveiro, Portugal
| | - Ruth Pereira
- Department of Biology, Faculty of Sciences of the University of Porto, Porto, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
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Asselin S, Ingram JC. Uranium Leaching from Contaminated Soil Utilizing Rhamnolipid, EDTA, and Citric Acid. APPLIED AND ENVIRONMENTAL SOIL SCIENCE 2014; 2014:462514. [PMID: 29176990 PMCID: PMC5699500 DOI: 10.1155/2014/462514] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Biosurfactants have recently gained attention as "green" agents that can be used to enhance the remediation of heavy metals and some organic matter in contaminated soils. The overall objective of this paper was to investigate rhamnolipid, a microbial produced biosurfactant, and its ability to leach uranium present in contaminated soil from an abandoned mine site. Soil samples were collected from two locations in northern Arizona: Cameron (site of open pit mining) and Leupp (control-no mining). The approach taken was to first determine the total uranium content in each soil using a hydrofluoric acid digestion, then comparing the amount of metal removed by rhamnolipid to other chelating agents EDTA and citric acid, and finally determining the amount of soluble metal in the soil matrix using a sequential extraction. Results suggested a complex system for metal removal from soil utilizing rhamnolipid. It was determined that rhamnolipid at a concentration of 150 μM was as effective as EDTA but not as effective as citric acid for the removal of soluble uranium. However, the rhamnolipid was only slightly better at removing uranium from the mining soil compared to a purified water control. Overall, this study demonstrated that rhamnolipid ability to remove uranium from contaminated soil is comparable to EDTA and to a lesser extent citric acid, but, for the soils investigated, it is not significantly better than a simple water wash.
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Affiliation(s)
- Sara Asselin
- Department of Chemistry and Biochemistry, Northern Arizona University, Flagstaff, AZ, USA
- Deerpoint Group, Inc., Fresno, CA, USA
| | - Jani C. Ingram
- Department of Chemistry and Biochemistry, Northern Arizona University, Flagstaff, AZ, USA
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Kim JS, Chung KW, Lee HI, Yoon HS, Kumar JR. Leaching behavior of uranium and vanadium using strong sulfuric acid from Korean black shale ore. J Radioanal Nucl Chem 2013. [DOI: 10.1007/s10967-013-2732-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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