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Ren S, Dong F, Liu J, Bekele TG, Wang Y, Zhao H, Chen J, Tan F, Wang X. Development of diffusive gradients in thin film technique for seasonal monitoring of benzophenone-type UV filters in coastal waters. WATER RESEARCH 2022; 222:118944. [PMID: 35963135 DOI: 10.1016/j.watres.2022.118944] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 07/30/2022] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
Benzophenone(BP)-type UV filters are continuously released into various aquatic environments via the effluent discharge of wastewater treatment plants (WWTPs) and recreational activities in coastal beaches. In this study, we developed a robust and reliable sampling approach, diffusive gradients in thin-films (DGT), for seasonal monitoring of six BP derivatives in coastal waters to investigate their occurrence and environmental risk. The binding capacities of both XAD-2 and HLB gels for test BPs were over 252 μg with no significant deterioration in marine environment, suggesting that theoretically, DGT is capable of sampling for at least 3 months effectively. The diffusion coefficients of BPs in freshwater and seawater were determined for the first time. The sampling performance showed no dependence on environmental conditions including pH (4.0-8.5), ionic strength (0.0001-0.5 M) and dissolved organic matter (0-20 mg L-1). The developed DGT samplers were successfully applied in a river estuary linked to a WWTP and a bathing beach at different periods of one year. Results showed that the concentrations of BPs in the coastal waters were dependent on seasonal variation. The highest level in summer and the ecological risk should be considered based on the risk quotient values. These results demonstrated that the present DGT method is suitable for measuring, characterization, and risk assessment of BPs in freshwater and marine environment.
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Affiliation(s)
- Suyu Ren
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Fan Dong
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jinghua Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Tadiyose Girma Bekele
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yan Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Hongxia Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jingwen Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Feng Tan
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
| | - Xiaochun Wang
- College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
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Smolíková V, Pelcová P, Ridošková A, Leermakers M. Diffusive Gradients in Thin-films technique for uranium monitoring along a salinity gradient: A comparative study on the performance of Chelex-100, Dow-PIWBA, Diphonix, and Lewatit FO 36 resin gels in the Scheldt estuary. Talanta 2021; 240:123168. [PMID: 34954614 DOI: 10.1016/j.talanta.2021.123168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/10/2021] [Accepted: 12/21/2021] [Indexed: 10/19/2022]
Abstract
Monitoring of uranium in the environment using the Diffusive Gradients in Thin-films (DGT) technique gains in importance as it can provide unique information about the bioavailability of the element and allows its long-term in-situ measurement. Hence, in this study, four DGT binding phases (Chelex-100, Dow-PIWBA, Diphonix, and Lewatit FO 36 resins) were evaluated for uranium monitoring to assess the robustness of their performance in estuarine and marine environments. These DGTs were deployed along the Scheldt estuary (Belgium and the Netherlands) over four campaigns between 2014 and 2021. The DGT performance (ratio of the DGT-determined vs. dissolved U concentration in grab water sample) varied with the water salinity. The Chelex-100 DGTs generally provided good performance in freshwater (median ratios close to 1.0), but an inverse correlation with the increasing salinity was observed (median ratios 0.7 at the stations with salinity >5). The Lewatit FO 36 DGTs provided good performance in the salinity range 0-18 (median ratios 1.0). However, a strong negative influence was observed at stations with high salinity levels (>18, ratio 0.6) and during the long-term deployment in seawater (ratios <0.5 over deployment periods ≥2 days). The Dow-PIWBA and Diphonix DGTs provided overall similar results with excellent performances along the whole salinity gradient (median ratios 1.1 and 1.0, respectively). Nevertheless, the long-term deployment trial in seawater (salinity ∼27) revealed the robustness of Diphonix DGTs that provided outstanding results even after 28 days of deployment (ratio 1.0). The differences in the performance of tested DGT resins were mostly given by the changes of U speciation along the salinity gradient. The speciation modelling of U showed that calcium uranyl carbonate complexes dominate along the Scheldt estuary (from 97 to 86% seawards) with increasing fraction of UO2(CO3)34- (from 2 to 14%) towards the mouth.
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Affiliation(s)
- Vendula Smolíková
- Analytical, Environmental and Geochemistry, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium; Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic
| | - Pavlína Pelcová
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic
| | - Andrea Ridošková
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic
| | - Martine Leermakers
- Analytical, Environmental and Geochemistry, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium.
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Chaplin JD, Warwick PE, Cundy AB, Bochud F, Froidevaux P. Novel DGT Configurations for the Assessment of Bioavailable Plutonium, Americium, and Uranium in Marine and Freshwater Environments. Anal Chem 2021; 93:11937-11945. [PMID: 34432435 DOI: 10.1021/acs.analchem.1c01342] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Plutonium, americium, and uranium contribute to the radioactive contamination of the environment and are risk factors for elevated radiation exposure via ingestion through food or water. Due to the significant environmental inventory of these radioelements, a sampling method to accurately monitor their bioavailable concentrations in natural waters is necessary, especially since physicochemical factors can cause significant temporal fluctuations in their waterborne concentrations. To this end, we engineered novel diffusive gradients in thin-film (DGT) configurations using resin gels, which are selective for UO22+, Pu(IV + V), and Am(III) among an excess of extraneous cations. In this work, we also report an improved synthesis of our in-house ion-imprinted polymer resin, which we used to manufacture a resin gel to capture Am(III). The effective diffusion coefficients of Pu, Am, and U in agarose cross-linked polyacrylamide were determined in freshwater and seawater simulants and in natural seawater, to calibrate these configurations for environmental deployments.
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Affiliation(s)
- Joshua D Chaplin
- Institute of Radiation Physics, Lausanne University Hospital and University of Lausanne, 1 Rue du Grand-Pré, CH-1007 Lausanne, Switzerland
| | - Phillip E Warwick
- School of Ocean and Earth Science, University of Southampton, National Oceanography Centre, European Way, Southampton SO14 3ZH, United Kingdom
| | - Andrew B Cundy
- School of Ocean and Earth Science, University of Southampton, National Oceanography Centre, European Way, Southampton SO14 3ZH, United Kingdom
| | - François Bochud
- Institute of Radiation Physics, Lausanne University Hospital and University of Lausanne, 1 Rue du Grand-Pré, CH-1007 Lausanne, Switzerland
| | - Pascal Froidevaux
- Institute of Radiation Physics, Lausanne University Hospital and University of Lausanne, 1 Rue du Grand-Pré, CH-1007 Lausanne, Switzerland
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4
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Chen G, Wang H, Han L, Yang N, Hu B, Qiu M, Zhong X. Highly efficient removal of U(VI) by a novel biochar supported with FeS nanoparticles and chitosan composites. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114807] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Gao L, Gao B, Xu D, Liu L. DGT: A promising technology for in-situ measurement of metal speciation in the environment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 715:136810. [PMID: 32007878 DOI: 10.1016/j.scitotenv.2020.136810] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 01/15/2020] [Accepted: 01/17/2020] [Indexed: 06/10/2023]
Abstract
Toxicity, bioavailability, and mobility of a metal depend on its speciation rather than its total concentration. In this discussion, we emphasize the need for field-based metal speciation analysis methods, given the flaws of traditional techniques. We express a science-based opinion that the diffusive gradients in thin-films (DGT) is a promising and powerful technique for performing in-situ measurement of metal species or speciation in different environmental samples. Several limitations and challenges in further application of DGT are also highlighted in this discussion.
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Affiliation(s)
- Li Gao
- State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Department of Water Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
| | - Bo Gao
- State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Department of Water Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China.
| | - Dongyu Xu
- Department of Water Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
| | - Linghua Liu
- State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Department of Water Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
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Zhao J, Cornett RJ, Chakrabarti CL. Assessing the uranium DGT-available fraction in model solutions. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121134. [PMID: 31732352 DOI: 10.1016/j.jhazmat.2019.121134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 08/31/2019] [Accepted: 09/01/2019] [Indexed: 06/10/2023]
Abstract
The uranium speciation in humic acid (HA) and fulvic acid (FA) model solutions was investigated by diffusive gradients in thin films (DGT). A reference solution was used to normalize the DGT data from different samples. This approach was used to assess uranium DGT-available fraction (FU), which was calculated from experimental data and reflect both the mobility and lability of uranium species. FU decreased with increasing HA or FA concentrations, because more uranium was able to bind the strong binding sites of HA or FA. When copper was spiked, FU increased due to the competition between copper and uranium. In HA model solutions, an increase of ionic strength could increase FU, and when pH was greater than 7, FU increased significantly. The DGT uptake factor (φ), which can be obtained from data fitting, is the ratio of the product of diffusion coefficient and lability degree of the unknown sample to that of the reference solution. In U-HA-NaHCO3 solutions, UO2(CO3)22- had a relatively high φ value and might be the most DGT-available species. This approach allows the comparison of DGT data from different samples, and combining with a data fitting procedure, it can be used to investigate the distribution of metal species.
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Affiliation(s)
- Jiujiang Zhao
- Key Laboratory of Eco-Geochemistry, Ministry of Natural Resources, National Research Center for Geoanalysis, 26 Baiwanzhuang Street, Beijing, 100037, China; Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada.
| | - R J Cornett
- Department of Earth and Environmental Sciences, University of Ottawa, ON K1N 6N5, Canada
| | - C L Chakrabarti
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
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Zhang YY, Lv JW, Dong XJ, Fang Q, Tan WF, Wu XY, Deng QW. Influence on Uranium(VI) migration in soil by iron and manganese salts of humic acid: Mechanism and behavior. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 256:113369. [PMID: 31662254 DOI: 10.1016/j.envpol.2019.113369] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 09/23/2019] [Accepted: 10/08/2019] [Indexed: 06/10/2023]
Abstract
Soil contains large amounts of humic acid (HA), iron ions and manganese ions, all of which affect U(VI) migration in the soil. HA interacts with iron and manganese ions to form HA salts (called HA-Fe and HA-Mn in this paper); however, the effects of HA-Fe and HA-Mn on the migration of U(VI) is not fully understood. In this study, HA-Fe and HA-Mn were compounded by HA interactions with ferric chloride hexahydrate and manganese chloride tetrahydrate, respectively. The influence of HA, HA-Fe and HA-Mn on U(VI) immobilization and migration was investigated by bath adsorption experiments and adsorption-desorption experiments using soil columns. The results showed that the presence of HA, HA-Fe and HA-Mn retarded the migration of U(VI) in soil. Supported by X-ray photoelectron spectroscopy (XPS) and BCR sequential extraction analyses, a plausible explanation for the retardation was that HA-Fe and HA-Mn could reduce hexavalent uranium to stable tetravalent uranium and increase the specific gravity of Fe/Mn oxide-bound uranium and organic/sulfide-bound uranium, which made it difficult for them to longitudinally migrate in soil. Scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and surface area and pore size analyses indicated that the complex formed between the hydroxyl, amino and carboxyl groups of HA-Fe and U(VI) increased the crystallinity of HA-Fe. The reaction between U(VI) and the hydroxyl, amino, aldehyde, keto and chlorine-containing groups of HA-Mn had no effect on the crystallinity of HA-Mn. Notably, the column desorption experiment found that the U(VI) immobilized in the soil remigrated under the effect of rain leaching, and acid rain promoted uranium remigration better than neutral rain. The findings provide some guidance for the decommissioning disposal of uranium contaminated site and it's risk assessments.
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Affiliation(s)
- Yuan-Yuan Zhang
- School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China
| | - Jun-Wen Lv
- School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China; Hengyang Key Laboratory of Contamination Control and Remediation, Hengyang 421001, China.
| | - Xue-Jie Dong
- School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China
| | - Qi Fang
- School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China; Hengyang Key Laboratory of Contamination Control and Remediation, Hengyang 421001, China
| | - Wen-Fa Tan
- School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China; Hengyang Key Laboratory of Contamination Control and Remediation, Hengyang 421001, China
| | - Xiao-Yan Wu
- School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China; Hengyang Key Laboratory of Contamination Control and Remediation, Hengyang 421001, China
| | - Qin-Wen Deng
- School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China; Hengyang Key Laboratory of Contamination Control and Remediation, Hengyang 421001, China
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Menegário AA, Yabuki LNM, Luko KS, Williams PN, Blackburn DM. Use of diffusive gradient in thin films for in situ measurements: A review on the progress in chemical fractionation, speciation and bioavailability of metals in waters. Anal Chim Acta 2017; 983:54-66. [DOI: 10.1016/j.aca.2017.06.041] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 06/23/2017] [Accepted: 06/24/2017] [Indexed: 11/16/2022]
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9
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Pedrobom JH, Eismann CE, Menegário AA, Galhardi JA, Luko KS, Dourado TDA, Kiang CH. In situ speciation of uranium in treated acid mine drainage using the diffusion gradients in thin films technique (DGT). CHEMOSPHERE 2017; 169:249-256. [PMID: 27880923 DOI: 10.1016/j.chemosphere.2016.11.082] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 11/04/2016] [Accepted: 11/15/2016] [Indexed: 05/27/2023]
Abstract
The exchange membranes P81 and DE81 and Chelex-100 resin were used to perform in situ speciation of uranium in treated acid mine drainage at the Osamu Utsumi mining site, Poços de Caldas city, Southeast Brazil. To investigate possible chemical modifications in the samples during analysis, the three ligands were deployed in situ and in a laboratory (in lab). The results obtained in situ were also compared to a speciation performed using Visual MINTEQ software. Chelex-100 retained total labile U for a period of up to 48 h. The labile U fraction determined by Chelex 100 ranged from 107 ± 6% to 147 ± 44% in situ and from 115 ± 22% to 191 ± 5% in lab. DE81 retained anionic U species up to 8 h, with labile fractions ranging from 37 ± 2% to 76 ± 3% in situ and 34 ± 12% to 180 ± 17% in lab. P81 exhibited a lower efficiency in retaining U species, with concentrations ranging from 6± 2% to 19± 2% in situ and 3± 2% to 18± 2% in lab. The speciation obtained from MINTEQ suggests that the major U species were UO2OH+, UO2(OH)3-, UO2(OH)2(aq), Ca2UO2(CO3)3(aq), CaUO2(CO3)32-, UO2(CO3)22-, and UO2(CO3)34-. This result is in accordance with the results obtained in situ. Differences concerning speciation and the total and soluble U concentrations were observed between the deployments performed in situ and in the laboratory, indicating that U speciation must be performed in situ.
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Affiliation(s)
- Jorge Henrique Pedrobom
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
| | - Carlos Eduardo Eismann
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
| | - Amauri A Menegário
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil.
| | - Juliana Aparecida Galhardi
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
| | - Karen Silva Luko
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
| | - Thiago de Araujo Dourado
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
| | - Chang Hung Kiang
- Laboratório de Estudos de Bacias - LEBAC, Instituto de Geociências e Ciências Exatas - IGCE, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
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Wang Y, Ding S, Gong M, Xu S, Xu W, Zhang C. Diffusion characteristics of agarose hydrogel used in diffusive gradients in thin films for measurements of cations and anions. Anal Chim Acta 2016; 945:47-56. [DOI: 10.1016/j.aca.2016.10.003] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 09/15/2016] [Accepted: 10/01/2016] [Indexed: 10/20/2022]
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Drozdzak J, Leermakers M, Gao Y, Phrommavanh V, Descostes M. Novel speciation method based on Diffusive Gradients in Thin Films for in situ measurement of uranium in the vicinity of the former uranium mining sites. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 214:114-123. [PMID: 27070846 DOI: 10.1016/j.envpol.2016.04.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 03/23/2016] [Accepted: 04/01/2016] [Indexed: 06/05/2023]
Abstract
The Diffusive Gradients in Thin Films (DGT) technique using PIWBA resin (The Dow Chemical Company) was developed and validated for the measurement of uranium (U) concentration in natural and uranium mining influenced waters. The U uptake on the PIWBA resin gel was 97.3 ± 0.4% (batch method; Vsol = 5 mL; [U] = 20 μg L(-1); 0.01 M NaNO3; pH = 7.0 ± 0.2). The optimal eluent was found to be HNO3conc/70 °C with an elution efficiency of 88.9 ± 1.4%. The laboratory DGT investigation demonstrated that the PIWBA resin gel exhibits a very good performance across a wide range of pH (3-9) and ionic strength (0.001-0.7 M NaNO3) at different time intervals. Neither effect of PO4(3-) (up to 1.72 × 10(-4) M), nor of HCO3(-) (up to 8.20 × 10(-3) M) on the quantitative measurement of uranium by DGT-PIWBA method were observed. Only at very high Ca(2+) (2.66 × 10(-4) M), and SO4(2-) (5.55 × 10(-4) M) concentration, the U uptake on DGT-PIWBA was appreciably lessened. In-situ DGT field evaluation was carried out in the vicinity of three former uranium mining sites in France (Loire-Atlantique and Herault departments), which employ different water treatment technologies and have different natural geochemical characteristics. There was a similar or inferior U uptake on DGT-Chelex(®)-100 in comparison with the U accumulation on a DGT-PIWBA sampler. Most likely, the performance of Chelex(®)-100 was negatively affected by a highly complex matrix of mining waters. The high concentration and identity of co-accumulating analytes, typical for the mining environment, did not have a substantial impact on the quantitative uptake of labile U species on DGT- PIWBA. The use of the polyphenol impregnated anion exchange resin leads to a significant advancement in the application and development of the DGT technique for determination of U in the vicinity of the former uranium mining sites.
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Affiliation(s)
- Jagoda Drozdzak
- Analytical, Environmental and Geochemistry (AMGC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium.
| | - Martine Leermakers
- Analytical, Environmental and Geochemistry (AMGC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Yue Gao
- Analytical, Environmental and Geochemistry (AMGC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Vannapha Phrommavanh
- AREVA Mines, R&D Dpt., Tour AREVA, 1 Place Jean Millier, 92084 Paris La Défense, France
| | - Michael Descostes
- AREVA Mines, R&D Dpt., Tour AREVA, 1 Place Jean Millier, 92084 Paris La Défense, France
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Suárez CA, de Simone TV, Menegário AA, Rolisola AM, Luko KS, Gastmans D, da Conceição FT, Kiang CH. In situ redox speciation analysis of chromium in water by diffusive gradients in thin films using a DE81 anion exchange membrane. Talanta 2016; 154:299-303. [DOI: 10.1016/j.talanta.2016.03.085] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 03/23/2016] [Accepted: 03/25/2016] [Indexed: 10/22/2022]
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13
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Uranium aqueous speciation in the vicinity of the former uranium mining sites using the diffusive gradients in thin films and ultrafiltration techniques. Anal Chim Acta 2016; 913:94-103. [DOI: 10.1016/j.aca.2016.01.052] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 01/26/2016] [Accepted: 01/31/2016] [Indexed: 11/19/2022]
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14
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Ding S, Wang Y, Zhang L, Xu L, Gong M, Zhang C. New holder configurations for use in the diffusive gradients in thin films (DGT) technique. RSC Adv 2016. [DOI: 10.1039/c6ra19677b] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study reports two new holder configurations that can be used in the diffusive gradients in thin films (DGT) technique, including a dual-mode holder and a new flat-type holder.
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Affiliation(s)
- Shiming Ding
- State Key Laboratory of Lake Science and Environment
- Nanjing Institute of Geography and Limnology
- Chinese Academy of Sciences
- Nanjing 210008
- China
| | - Yan Wang
- State Key Laboratory of Lake Science and Environment
- Nanjing Institute of Geography and Limnology
- Chinese Academy of Sciences
- Nanjing 210008
- China
| | - Liping Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Ministry of Education
- College of Environment
- Hohai University
- Nanjing 210098
| | - Lv Xu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Ministry of Education
- College of Environment
- Hohai University
- Nanjing 210098
| | - Mengdan Gong
- State Key Laboratory of Lake Science and Environment
- Nanjing Institute of Geography and Limnology
- Chinese Academy of Sciences
- Nanjing 210008
- China
| | - Chaosheng Zhang
- GIS Centre
- Ryan Institute
- School of Geography and Archaeology
- National University of Ireland
- Galway
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15
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Drozdzak J, Leermakers M, Gao Y, Phrommavanh V, Descostes M. Evaluation and application of Diffusive Gradients in Thin Films (DGT) technique using Chelex®-100, Metsorb™ and Diphonix® binding phases in uranium mining environments. Anal Chim Acta 2015; 889:71-81. [DOI: 10.1016/j.aca.2015.07.057] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 07/17/2015] [Accepted: 07/30/2015] [Indexed: 11/29/2022]
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Omanović D, Pižeta I, Vukosav P, Kovács E, Frančišković-Bilinski S, Tamás J. Assessing element distribution and speciation in a stream at abandoned Pb-Zn mining site by combining classical, in-situ DGT and modelling approaches. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 511:423-34. [PMID: 25569578 DOI: 10.1016/j.scitotenv.2014.12.076] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Revised: 12/17/2014] [Accepted: 12/22/2014] [Indexed: 05/16/2023]
Abstract
The distribution and speciation of elements along a stream subjected to neutralised acid mine drainage (NAMD) effluent waters (Mátra Mountain, Hungary; Toka stream) were studied by a multi-methodological approach: dissolved and particulate fractions of elements were determined by HR-ICPMS, whereas speciation was carried out by DGT, supported by speciation modelling performed by Visual MINTEQ. Before the NAMD discharge, the Toka is considered as a pristine stream, with averages of dissolved concentrations of elements lower than world averages. A considerable increase of element concentrations caused by effluent water inflow is followed by a sharp or gradual concentration decrease. A large difference between total and dissolved concentrations was found for Fe, Al, Pb, Cu, Zn and As in effluent water and at the first downstream site, with high correlation factors between elements in particulate fraction, indicating their common behaviour, governed by the formation of ferri(hydr)oxides (co)precipitates. In-situ speciation by the DGT technique revealed that Zn, Cd, Ni, Co, Mn and U were predominantly present as a labile, potentially bioavailable fraction (>90%). The formation of strong complexes with dissolved organic matter (DOM) resulted in a relatively low DGT-labile concentration of Cu (42%), while low DGT-labile concentrations of Fe (5%) and Pb (12%) were presumably caused by their existence in colloidal (particulate) fraction which is not accessible to DGT. Except for Fe and Pb, a very good agreement between DGT-labile concentrations and those predicted by the applied speciation model was obtained, with an average correlation factor of 0.96. This study showed that the in-situ DGT technique in combination with model-predicted speciation and classical analysis of samples could provide a reasonable set of data for the assessment of the water quality status (WQS), as well as for the more general study of overall behaviour of the elements in natural waters subjected to high element loads.
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Affiliation(s)
- Dario Omanović
- Division for Marine and Environmental Research, Ruđer Bošković Institute, P.O. Box 180, HR-10002 Zagreb, Croatia.
| | - Ivanka Pižeta
- Division for Marine and Environmental Research, Ruđer Bošković Institute, P.O. Box 180, HR-10002 Zagreb, Croatia
| | - Petra Vukosav
- Division for Marine and Environmental Research, Ruđer Bošković Institute, P.O. Box 180, HR-10002 Zagreb, Croatia
| | - Elza Kovács
- Institute of Water and Environmental Management, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi 138, H-4032 Debrecen, Hungary
| | | | - János Tamás
- Institute of Water and Environmental Management, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi 138, H-4032 Debrecen, Hungary
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Drobot B, Steudtner R, Raff J, Geipel G, Brendler V, Tsushima S. Combining luminescence spectroscopy, parallel factor analysis and quantum chemistry to reveal metal speciation - a case study of uranyl(vi) hydrolysis. Chem Sci 2015; 6:964-972. [PMID: 29560182 PMCID: PMC5811152 DOI: 10.1039/c4sc02022g] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 10/24/2014] [Indexed: 12/17/2022] Open
Abstract
This study of aqueous metal speciation is an advanced combination of theoretical and experimental methods. Continuous wave (CW) and time-resolved laser-induced fluorescence spectroscopy (TRLFS) data of uranyl(vi) hydrolysis were analyzed using parallel factor analysis (PARAFAC). Distribution patterns of five major species were thereby derived under a fixed uranyl concentration (10-5 M) over a wide pH range from 2 to 11. UV (180 nm to 370 nm) excitation spectra were extracted for individual species. Time-dependent density functional theory (TD-DFT) calculations revealed ligand excitation (water, hydroxo, oxo) in this region and ligand-to-metal charge transfer (LMCT) responsible for luminescence. Thus excitation in the UV region is extreme ligand sensitive and specific. Combining findings from PARAFAC and DFT the [UO2(H2O)5]2+ cation (aquo complex 1 : 0) and four hydroxo complexes (1 : 1, 3 : 5, 3 : 7 and 1 : 3) were identified. The methodological concept used here is applicable to luminescent metals in general and thus enables acquisition of refined structural and thermodynamical data of lanthanide and actinide complexation.
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Affiliation(s)
- Björn Drobot
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
| | - Robin Steudtner
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
| | - Johannes Raff
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
- Helmholtz Zentrum Dresden Rossendorf , Helmholtz Institute Freiberg for Resource Technology , Halsbrücker Straße 34 , 09599 Freiberg , Germany
| | - Gerhard Geipel
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
| | - Vinzenz Brendler
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
| | - Satoru Tsushima
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
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Evaluation of diffusive gradients in thin-films using a Diphonix® resin for monitoring dissolved uranium in natural waters. Anal Chim Acta 2015; 854:78-85. [DOI: 10.1016/j.aca.2014.11.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 11/07/2014] [Accepted: 11/15/2014] [Indexed: 10/24/2022]
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19
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Destro Colaço C, Nozomi Marques Yabuki L, Marta Rolisola A, Antonio Menegário A, de Almeida E, Alfredo Suárez C, Gao Y, Corns WT, do Nascimento Filho VF. Determination of mercury in river water by diffusive gradients in thin films using P81 membrane as binding layer. Talanta 2014; 129:417-21. [DOI: 10.1016/j.talanta.2014.05.025] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 05/14/2014] [Accepted: 05/18/2014] [Indexed: 11/29/2022]
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20
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Cusnir R, Steinmann P, Bochud F, Froidevaux P. A DGT technique for plutonium bioavailability measurements. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:10829-34. [PMID: 25141175 DOI: 10.1021/es501149v] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The toxicity of heavy metals in natural waters is strongly dependent on the local chemical environment. Assessing the bioavailability of radionuclides predicts the toxic effects to aquatic biota. The technique of diffusive gradients in thin films (DGT) is largely exploited for bioavailability measurements of trace metals in waters. However, it has not been applied for plutonium speciation measurements yet. This study investigates the use of DGT technique for plutonium bioavailability measurements in chemically different environments. We used a diffusion cell to determine the diffusion coefficients (D) of plutonium in polyacrylamide (PAM) gel and found D in the range of 2.06-2.29 × 10(-6) cm(2) s(-1). It ranged between 1.10 and 2.03 × 10(-6) cm(2) s(-1) in the presence of fulvic acid and in natural waters with low DOM. In the presence of 20 ppm of humic acid of an organic-rich soil, plutonium diffusion was hindered by a factor of 5, with a diffusion coefficient of 0.50 × 10(-6) cm(2) s(-1). We also tested commercially available DGT devices with Chelex resin for plutonium bioavailability measurements in laboratory conditions and the diffusion coefficients agreed with those from the diffusion cell experiments. These findings show that the DGT methodology can be used to investigate the bioaccumulation of the labile plutonium fraction in aquatic biota.
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Affiliation(s)
- Ruslan Cusnir
- Institute of Radiation Physics, Lausanne University Hospital , Lausanne, Switzerland
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21
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Hong Y, Dan NP, Kim E, Choi HJ, Han S. Application of diffusive gel-type probes for assessing redox zonation and mercury methylation in the Mekong Delta sediment. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2014; 16:1799-1808. [PMID: 24877160 DOI: 10.1039/c3em00728f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The vertical profiles of PO4(3-), Mn, Fe, S(2-), Hg, and CH3Hg(+) in sediment pore water were investigated using DGT and DET probes in the Tien River, the northern branch of Vietnam's Mekong Delta. Although some of the DGT measurements could be lower than the actual pore water concentrations due to the depletion of the species, the measurements provided information for understanding redox zonation and Hg methylation. The gradual increases in the measured species concentrations with the sediment depth were observed and the diffusive fluxes of the species to overlying water were expected. The vertical profiles suggested that (1) SO4(2-) seemed to be reduced before Fe(3+), or the two electron acceptors were reduced simultaneously; (2) the release of PO4(3-) was more closely related to S(2-) than Fe release; and (3) Hg methylation was active in the micro-niche between the aerobic and anaerobic transition zones. The maximum pore water CH3Hg(+) concentrations were observed at depths just above where the maximum S(2-) concentrations were detected. Hence, the maximum CH3Hg(+) concentration was observed near surficial sediments (less than 1 cm from the surface) in brackish water, and at a depth of 3 cm in fresh water. The different vertical profiles led to a CH3Hg(+) diffusive flux eight-times greater in brackish than in fresh water. The present study showed that the in situ application of DGT and DET probes was helpful to understand coupled biogeochemical reactions and mercury methylation by measuring pore water redox species.
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Affiliation(s)
- Yongseok Hong
- Department of Environmental Engineering, Daegu University, Daegu, Republic of Korea
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22
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Turner GSC, Mills GA, Bowes MJ, Burnett JL, Amos S, Fones GR. Evaluation of DGT as a long-term water quality monitoring tool in natural waters; uranium as a case study. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2014; 16:393-403. [PMID: 24448308 DOI: 10.1039/c3em00574g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The performance of the diffusive gradient in thin film technique (DGT) was evaluated as a tool for the long-term monitoring of water quality, using uranium as a case study. DGTs with a Metsorb™ (TiO2) sorbent were deployed consecutively at two alkaline freshwater sites, the River Enborne and the River Lambourn, UK for seven-day intervals over a five-month deployment period to obtain time weighted average concentrations. Weekly spot samples were taken to determine physical and chemical properties of the river water. Uranium was measured in these spot samples and after extraction from the DGT devices. The accuracy of the DGT device time weighted average concentrations to averaged spot water samples in both rivers was 86% (27 to 205%). The DGT diffusive boundary layer (DBL) (0.037-0.141 cm - River Enborne and 0.062-0.086 cm - River Lambourn) was affected by both water flow and biofouling of the diffusion surface. DBL thicknesses found at both sites were correlated with flow conditions with an R(2) value of 0.614. Correlations were also observed between the DBL thickness and dissolved organic carbon (R(2) = 0.637) in the River Lambourn, indicating the potential presence of a complex zone of chemical interactions at the surface of the DGT. The range of DBL thicknesses found at the River Lambourn site were also attributed to of the development of macro-flora on the active sampling surface, indicating that the DBL thickness cannot be assumed to be water flow dependant only. Up to a 57% under-estimate of uranium DGT concentration was observed compared to spot sample concentrations if the DBL was neglected. This study has shown that the use of DGT can provide valuable information in environmental monitoring schemes as part of a 'tool-box' approach when used alongside conventional spot sampling methods.
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Affiliation(s)
- Geraldine S C Turner
- School of Earth and Environmental Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth, Hampshire, UK.
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23
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de Oliveira RLF, Pedrobom JH, Menegário AA, Domingos RN, Py DA, Kiang CH. Determination of in situ speciation of manganese in treated acid mine drainage water by using multiple diffusive gradients in thin films devices. Anal Chim Acta 2013; 799:23-8. [DOI: 10.1016/j.aca.2013.09.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 09/05/2013] [Accepted: 09/09/2013] [Indexed: 10/26/2022]
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24
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Sui DP, Fan HT, Li J, Li Y, Li Q, Sun T. Application of poly (ethyleneimine) solution as a binding agent in DGT technique for measurement of heavy metals in water. Talanta 2013; 114:276-82. [DOI: 10.1016/j.talanta.2013.05.027] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Revised: 05/06/2013] [Accepted: 05/11/2013] [Indexed: 11/30/2022]
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25
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Stockdale A, Bryan ND. Application of DGT to high pH environments: uptake efficiency of radionuclides of different oxidation states onto Chelex binding gel. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2013; 15:1087-1091. [PMID: 23507761 DOI: 10.1039/c3em00088e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The DGT Chelex binding phase has not been tested for binding efficiency over the extreme high pH range (i.e., 10 to 13). Here, we examined the uptake efficiency of the gel-encapsulated Chelex cation exchange resin binding phase when in direct contact with solutions of radionuclides of different oxidation states over the circumneutral to high pH range (∼7 to 13). Results show that the Chelex binding gel is suitable for Eu(3+) for circumneutral pH, for UO2(2+) up to at least pH 10.7 and for NpO2(+) up to at least pH 11.7. Application may be appropriate at higher pH values but testing of complete solution deployment units will be required. This work provides the framework to use DGT as a tool for the study of high pH radionuclide systems.
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Affiliation(s)
- Anthony Stockdale
- Centre for Radiochemistry Research, School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
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26
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High resolution characterization of uranium in sediments by DGT and DET techniques ACA-S-12-2197. Anal Chim Acta 2013; 763:50-6. [DOI: 10.1016/j.aca.2012.12.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 11/30/2012] [Accepted: 12/02/2012] [Indexed: 11/18/2022]
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27
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Liu XY, Wang LH, Zheng Z, Kang ML, Li C, Liu CL. Molecular dynamics simulation of the diffusion of uranium species in clay pores. JOURNAL OF HAZARDOUS MATERIALS 2013; 244-245:21-28. [PMID: 23246937 DOI: 10.1016/j.jhazmat.2012.11.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2012] [Revised: 11/01/2012] [Accepted: 11/13/2012] [Indexed: 06/01/2023]
Abstract
Molecular dynamics simulations were carried out to investigate the diffusive behavior of aqueous uranium species in montmorillonite pores. Three uranium species (UO(2)(2+), UO(2)CO(3), UO(2)(CO(3))(2)(2-)) were confirmed in both the adsorbed and diffuse layers. UO(2)(CO(3))(3)(4-) was neglected in the subsequent analysis due to its scare occurrence. The species-based diffusion coefficients in montmorillonite pores were then calculated, and compared with the water mobility and their diffusivity in aqueous solution/feldspar nanosized fractures. Three factors were considered that affected the diffusive behavior of the uranium species: the mobility of water, the self-diffusion coefficient of the aqueous species, and the electrostatic forces between the negatively charged surface and charged molecules. The mobility of U species in the adsorbed layer decreased in the following sequence: UO(2)(2+)>UO(2)CO(3)>UO(2)(CO(3))(2)(2-). In the diffuse layer, we obtained the highest diffusion coefficient for UO(2)(CO(3))(2)(2-) with the value of 5.48×10(-10) m(2) s(-1), which was faster than UO(2)(2+). For these two charged species, the influence of electrostatic forces on the diffusion of solutes in the diffuse layer is overwhelming, whereas the influence of self-diffusion and water mobility is minor. Our study demonstrated that the negatively charged uranyl carbonate complex must be addressed in the safety assessment of potential radioactive waste disposal systems.
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Affiliation(s)
- Xiao-yu Liu
- Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry Molecular Engineering, Peking University, Beijing 100871, China
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28
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Hutchins CM, Panther JG, Teasdale PR, Wang F, Stewart RR, Bennett WW, Zhao H. Evaluation of a titanium dioxide-based DGT technique for measuring inorganic uranium species in fresh and marine waters. Talanta 2012; 97:550-6. [DOI: 10.1016/j.talanta.2012.05.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 05/03/2012] [Accepted: 05/08/2012] [Indexed: 11/24/2022]
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29
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Turner GS, Mills GA, Teasdale PR, Burnett JL, Amos S, Fones GR. Evaluation of DGT techniques for measuring inorganic uranium species in natural waters: Interferences, deployment time and speciation. Anal Chim Acta 2012; 739:37-46. [DOI: 10.1016/j.aca.2012.06.011] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Revised: 06/06/2012] [Accepted: 06/07/2012] [Indexed: 11/29/2022]
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30
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Comparing dissolved reactive phosphorus measured by DGT with ferrihydrite and titanium dioxide adsorbents: Anionic interferences, adsorbent capacity and deployment time. Anal Chim Acta 2011; 698:20-6. [DOI: 10.1016/j.aca.2011.04.049] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Revised: 04/13/2011] [Accepted: 04/25/2011] [Indexed: 11/16/2022]
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31
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32
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Gregusova M, Docekal B. New resin gel for uranium determination by diffusive gradient in thin films technique. Anal Chim Acta 2011; 684:142-6. [DOI: 10.1016/j.aca.2010.11.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Revised: 10/26/2010] [Accepted: 11/01/2010] [Indexed: 10/18/2022]
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33
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Duquène L, Vandenhove H, Tack F, Van Hees M, Wannijn J. Diffusive gradient in thin FILMS (DGT) compared with soil solution and labile uranium fraction for predicting uranium bioavailability to ryegrass. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2010; 101:140-147. [PMID: 19822385 DOI: 10.1016/j.jenvrad.2009.09.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2009] [Revised: 09/10/2009] [Accepted: 09/11/2009] [Indexed: 05/28/2023]
Abstract
The usefulness of uranium concentration in soil solution or recovered by selective extraction as unequivocal bioavailability indices for uranium uptake by plants is still unclear. The aim of the present study was to test if the uranium concentration measured by the diffusive gradient in thin films (DGT) technique is a relevant substitute for plant uranium availability in comparison to uranium concentration in the soil solution or uranium recovered by ammonium acetate. Ryegrass (Lolium perenne L. var. Melvina) is grown in greenhouse on a range of uranium spiked soils. The DGT-recovered uranium concentration (C(DGT)) was correlated with uranium concentration in the soil solution or with uranium recovered by ammonium acetate extraction. Plant uptake was better predicted by the summed soil solution concentrations of UO(2)(2+), uranyl carbonate complexes and UO(2)PO(4)(-). The DGT technique did not provide significant advantages over conventional methods to predict uranium uptake by plants.
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Affiliation(s)
- L Duquène
- SCK*CEN, Biosphere Impact Studies, Boeretang 200, B-2400 Mol, Belgium
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34
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Impact of organic matter and speciation on the behaviour of uranium in submerged ultrafiltration. J Memb Sci 2010. [DOI: 10.1016/j.memsci.2009.10.056] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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35
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Li W, Wang F, Zhang W, Evans D. Measurement of Stable and Radioactive Cesium in Natural Waters by the Diffusive Gradients in Thin Films Technique with New Selective Binding Phases. Anal Chem 2009; 81:5889-95. [DOI: 10.1021/ac9005974] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weijia Li
- Worsfold Water Quality Centre, Trent University, 1600 West Bank Drive, Peterborough, Ontario, K9J 7B8, Canada, Department of Environment and Geography, and Department of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada, and Radiation Protection Bureau, Health Canada, A.L.:6302D1, 775 Brookfield Road, Ottawa, Ontario, K1A 1C1, Canada
| | - Feiyue Wang
- Worsfold Water Quality Centre, Trent University, 1600 West Bank Drive, Peterborough, Ontario, K9J 7B8, Canada, Department of Environment and Geography, and Department of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada, and Radiation Protection Bureau, Health Canada, A.L.:6302D1, 775 Brookfield Road, Ottawa, Ontario, K1A 1C1, Canada
| | - Weihua Zhang
- Worsfold Water Quality Centre, Trent University, 1600 West Bank Drive, Peterborough, Ontario, K9J 7B8, Canada, Department of Environment and Geography, and Department of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada, and Radiation Protection Bureau, Health Canada, A.L.:6302D1, 775 Brookfield Road, Ottawa, Ontario, K1A 1C1, Canada
| | - Douglas Evans
- Worsfold Water Quality Centre, Trent University, 1600 West Bank Drive, Peterborough, Ontario, K9J 7B8, Canada, Department of Environment and Geography, and Department of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada, and Radiation Protection Bureau, Health Canada, A.L.:6302D1, 775 Brookfield Road, Ottawa, Ontario, K1A 1C1, Canada
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Li W, Li C, Zhao J, Cornett RJ. Diffusive gradients in thin films technique for uranium measurements in river water. Anal Chim Acta 2007; 592:106-13. [PMID: 17499077 DOI: 10.1016/j.aca.2007.04.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2007] [Revised: 04/05/2007] [Accepted: 04/06/2007] [Indexed: 11/30/2022]
Abstract
The diffusive gradients in thin films technique (DGT) was used for uranium measurements in water. DGT devices with Dowex resin binding phase (Dow DGT) were tested in synthetic river water, which gave 84% response to total uranium concentration. The devices were also deployed in natural river water and compared to devices with other types of binding phases, Chelex 100 resin beads imbedded in polyacrylamide hydrogel (Chelex DGT) and DE 81 anion exchange membrane (DE DGT), deployed in the same location at the same time. The measurement by Dow DGT was the lowest among the different types of the DGT devices, 45% of total uranium, while measurement by DE DGT was the highest, 98% of total uranium. The results achieved by the three types of DGT devices were explained by three DGT working mechanisms, equilibrium between complexes of resin/uranyl carbonates and complexes of resin/competitive ligands in water, effective reduction of uranyl carbonate concentration by the binding phase and dissociation of UO2(CO3)2(2-) and UO2(CO3)3(4-) within the diffusive layer in a DGT device. It is hoped that by deploying the DGT devices with different binding phases in natural waters, additional information on uranium speciation could be obtained.
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Affiliation(s)
- Weijia Li
- Radiation Protection Bureau, Health Canada, A.L.:6302D1, 775 Brookfield Rd, Ottawa, ON, K1A 1C1, Canada. weijia
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37
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Vandenhove H, Antunes K, Wannijn J, Duquène L, Van Hees M. Method of diffusive gradients in thin films (DGT) compared with other soil testing methods to predict uranium phytoavailability. THE SCIENCE OF THE TOTAL ENVIRONMENT 2007; 373:542-55. [PMID: 17241652 DOI: 10.1016/j.scitotenv.2006.12.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2006] [Revised: 12/01/2006] [Accepted: 12/04/2006] [Indexed: 05/13/2023]
Abstract
The measurement of diffusive gradients in thin films (DGT) has been proposed as a surrogate for metal uptake by plants. A small-scale experiment was performed to test the predictive capacity of the DGT method with respect to uranium availability and uptake by ryegrass. Correlation analyses were performed to compare the results obtained with the DGT device with more conventional bioavailability indices - concentration of uranium in pore water or in selective extracts. Six soils with different uranium contamination history and with distinct soil characteristics were used for the availability tests and the uptake experiment. The four uranium bioavailability indices screened were highly correlated, indicating that at least partially comparable uranium pools were assessed. The uranium concentration in the pore water was a better predictor for uranium uptake by ryegrass than amounts of uranium recovered following extraction with 0.11 M CH3COOH or 0.4 M MgCl2, the fractions considered exchangeable according to, respectively, the BCR or NIST standardized sequential extraction methods. The DGT measured concentration, C(DGT), was also highly correlated with plant uptake but the significance level was sensitive to the value of the diffusion coefficient (pH depend or not) used to calculate C(DGT). From the results obtained it could not be concluded that the DGT method would have an additional value in assessing uranium bioavailability.
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Affiliation(s)
- H Vandenhove
- Belgian Nuclear Research Centre, Environment Health and Safety, Biosphere Impact Studies, Boeretang 200, 2400 Mol, Belgium.
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