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Expósito-Suárez VM, Suárez-Navarro JA, Aguado-Herreros CM, Sanz MB, Suárez-Navarro MJ, Caro A. Increasing the recovery and selectivity of 238U, 235U, and 234U extraction with tri-n-butyl phosphate in mine tailing samples with a high copper content. Anal Chim Acta 2023; 1259:341183. [PMID: 37100480 DOI: 10.1016/j.aca.2023.341183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 03/26/2023] [Accepted: 04/05/2023] [Indexed: 04/28/2023]
Abstract
Abandoned Cu mine tailings may be associated high concentrations of U. However, the presence of stable cations such as Cu, Fe, Al, Ca, or Mg, etc. in high concentrations can reduce the chemical efficiency of the liquid-liquid extraction method with tri-n-butyl phosphate (TBP); it can also inhibit the electrodeposition of U on the stainless steel planchet where the sample is measured. In this work we studied an initial stage of complexation with ethylenediaminetetraacetic acid (EDTA) and a back extraction with different solutions: H2O, Na2CO3, and (NH4)2CO3 at room temperature and at 80 °C. The sensitivity of the method was 4.9·10-4 Bq for 238U and 234U, and 2.3·10-5 Bq for 235U. The validation of the method achieved 95% of the results when using a |ζ-score| ≤ ± 2.0 and a relative bias (RB[%]) ≤ ± 20% as the acceptance criteria. The recoveries obtained with the proposed method were higher than those achieved with the extraction method without initial complexation and re-extraction with H2O for water samples. Finally, this method was applied in practice to study the tailing of an abandoned Cu mine and the activity concentrations of 238U and 235U were compared with those obtained by gamma spectrometry for 234Th and 235U. The means and variances of both methods showed no significant differences between these two isotopes.
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Affiliation(s)
| | | | | | - M B Sanz
- CIEMAT, Avenida Complutense 40, 28040, Madrid, Spain
| | - M J Suárez-Navarro
- Universidad Politécnica de Madrid (UPM), E.T.S.I. Caminos, Canales y Puertos, Professor Aranguren s/n, 28040, Madrid, Spain
| | - A Caro
- CIEMAT, Avenida Complutense 40, 28040, Madrid, Spain
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Zhang L, Jia M, Wang X, Gao L, Zhang B, Wang L, Kong J, Li L. A novel fluorescence sensor for uranyl ion detection based on a dansyl-modified peptide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 292:122403. [PMID: 36708634 DOI: 10.1016/j.saa.2023.122403] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 01/06/2023] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
It is of great significance to sensitively and selectively detect uranyl ion (UO22+) in environmental and biological samples due to the high risks of UO22+ to human health. However, such suitable sensors are still scarce. A novel fluorescence sensor based on a dansyl-modified peptide, Dansyl-Glu-Glu-Pro-Glu-Trp-COOH (D-P5), was efficiently synthesized by Fmoc solid phase peptide synthesis. As the first linear peptide-based fluorescence sensor for UO22+, D-P5 exhibited high selectivity and sensitivity to UO22+ over 27 metal ions (UO22+, Cr3+, Cu2+, Ba2+, Hg2+, Pb2+, Co2+, Ag+, Fe3+, Ca2+, K+, Mg2+, Mn2+, Na+, Ni2+, Cd2+, Zn2+, Al3+, Dy3+, Er3+, Gd2+, Ho3+, La3+, Lu3+, Pr3+, Sm3+, Tm3+) by a turn-off fluorescence response in 10 mM HEPES buffer (pH 6.3). The effects of anions such as S2-, NO3-, SO42- CO32-, HCOO-, antioxidant ascorbic acid and 4-nitrophenyl acetate on the selectivity for UO22+ detection were also studies. D-P5 sensor could be used for detecting UO22+ in a good linear relationship with concentration in the range of 0-8.0 μM with a low limit of detection of 83.2 nM. Furthermore, the interaction of the sensor with UO22+ was characterized by ESI-MS, IR, XPS and ITC measurements. The 1:1 binding stoichiometry between the sensor and UO22+ was measured by the job's plot and further verified by ESI-MS. The binding constant of the sensor with UO22+ was calculated to be 9.8 × 104 M-1 by modified Benesi-Hildebrand equation. ITC results showed that theΔHθ andΔSθ for the interaction of D-P5 with UO22+ were -(7.167 ± 1.25) kJ·mol-1 and 66.5 J·mol-1·K-1, respectively. Time-resolved fluorescence spectroscopy indicated that the mechanism of fluorescence quenching of D-P5 by UO22+ ion was static quenching process. In addition, this sensor displayed a good practicality for UO22+ detection in lake water sample without tedious sample pretreatment.
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Affiliation(s)
- Lianshun Zhang
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, PR China
| | - Mengqing Jia
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, PR China
| | - Xi Wang
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, PR China
| | - Lei Gao
- Zhong Yuan Academy of Biological Medicine, Liaocheng People's Hospital, Liaocheng 252000, PR China
| | - Bo Zhang
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, PR China
| | - Lei Wang
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, PR China
| | - Jinming Kong
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, PR China
| | - Lianzhi Li
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, PR China.
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Gęca I, Korolczuk M. A Novel Eco-Friendly and Highly Sensitive Solid Lead-Tin Microelectrode for Trace U(VI) Determination in Natural Water Samples. SENSORS (BASEL, SWITZERLAND) 2023; 23:2552. [PMID: 36904757 PMCID: PMC10007126 DOI: 10.3390/s23052552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
For the first time a solid state lead-tin microelectrode (diameter ϕ 25 µm) was utilized for U(VI) ion determination by adsorptive stripping voltammetry. The described sensor is characterized by high durability, reusability and eco-friendly features, as the need for using lead and tin ions for metal film preplating has been eliminated, and consequently, the amount of toxic waste has been limited. The advantages of the developed procedure resulted also from the utilization of a microelectrode as a working electrode, because a restricted amount of metals is needed for its construction. Moreover, field analysis is possible to perform thanks to the fact that measurements can be carried out from unmixed solutions. The analytical procedure was optimized. The proposed procedure is characterized by two orders of magnitude linear dynamic range of U(VI) determination from 1 × 10-9 to 1 × 10-7 mol L-1 (120 s of accumulation). The detection limit was calculated to be 3.9 × 10-10 mol L-1 (accumulation time of 120 s). RSD% calculated from seven subsequent U(VI) determinations at a concentration of 2 × 10-8 mol L-1 was 3.5%. The correctness of the analytical procedure was confirmed by analyzing a natural certified reference material.
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Tyszczuk-Rotko K, Olchowski R, Kozak J, Sekerzh-Zenkovich O, Dobrowolski R. Modified Mesoporous Carbon Material (Pb-N-CMK-3) Obtained by a Hard-Templating Route, Dicyandiamide Impregnation and Electrochemical Lead Particles Deposition as an Electrode Material for the U(VI) Ultratrace Determination. MATERIALS 2021; 14:ma14216490. [PMID: 34772017 PMCID: PMC8585121 DOI: 10.3390/ma14216490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/16/2021] [Accepted: 10/26/2021] [Indexed: 11/24/2022]
Abstract
In this paper, a dicyandiamide-impregnated mesoporous carbon (N-CMK-3), electrochemically modified in situ with lead film (Pb-N-CMK-3), was tested as an electrode material for U(VI) ultratrace determination. The prepared carbon material was characterized by XRD, SEM-EDX, Raman, FT-IR, XPS analysis and nitrogen sorption measurements. The changes of electrochemical properties of glassy carbon electrodes (GCE) after the N-CMK-3 and Pb-N-CMK-3 modification were studied using CV and EIS methods. The modification of the GCE surface by the N-CMK-3 material and Pb film increases the electroactive area of the electrode and decreases the charge transfer residence and is likely responsible for the electrochemical improvement of the U(VI) analytical signal. Using square-wave adsorptive stripping voltammetry (SWAdSV), two linear calibration ranges extending from 0.05 to 1.0 nM and from 1.0 to 10.0 nM were observed, coupled with the detection and quantification limits of 0.014 and 0.047 nM, respectively. The Pb-N-CMK-3/GCE was successfully applied for U(VI) determination in reference materials (estuarine water SLEW-3 and trace elements in natural water SRM 1640a).
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Mahmoud MA. Sorption of U(VI) ions from aqueous solution by eggplant leaves: Isotherm, kinetics and thermodynamics studies. PROGRESS IN NUCLEAR ENERGY 2021. [DOI: 10.1016/j.pnucene.2021.103829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Cantaluppi C, Zannoni D, Cianchi A, Giacetti W, Lovisetto B, Pagnin E, Favero T. Methods for radioactivity measurements in drinking water using gamma spectrometry. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2021; 232:106566. [PMID: 33689935 DOI: 10.1016/j.jenvrad.2021.106566] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 02/15/2021] [Accepted: 02/19/2021] [Indexed: 06/12/2023]
Abstract
In this study, three methods to measure activity concentrations of radionuclides through high resolution gamma spectrometry are developed, optimized, and tested on drinking water samples. Two pre-concentration methods (partial evaporation and ion-exchange resins) were optimized for accuracy, precision, detection limits, costs, preparation, and measurements times. A new sampling method for 222Rn was designed and optimized to directly sample water from the tap, reducing and minimizing losses of radon during the sampling. A total number of 85 water samples were collected between 2017 and 2019 in collaboration with two drinking water suppliers in a wide area (~2000 km2) of the Veneto region, northeast Italy. These are the first results of radionuclides activity concentration in drinking water concerning a large extension in the foothill Veneto region. Finally, this study provides a first attempt of determining the spatial distribution and seasonal variations of radon activity concentration in drinking water in the study area.
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Affiliation(s)
- C Cantaluppi
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia, Consiglio Nazionale delle Ricerche, C.so Stati Uniti 4, Padova, 35127, Italy.
| | - D Zannoni
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia, Consiglio Nazionale delle Ricerche, C.so Stati Uniti 4, Padova, 35127, Italy; Geophysical Institute, University of Bergen, Bergen, Norway
| | - A Cianchi
- Qualified Expert of Radiation Protection, Via G. Pepe 12, 30172, Mestre, VE, Italy
| | - W Giacetti
- ETRA SpA Energia Territorio Risorse Ambientali, Largo Parolini 82, 36061, Bassano del Grappa, VI, Italy
| | - B Lovisetto
- ETRA SpA Energia Territorio Risorse Ambientali, Largo Parolini 82, 36061, Bassano del Grappa, VI, Italy
| | - E Pagnin
- Alto Trevigiano Servizi, Via Schiavonesca Priula, 86 Montebelluna, TV, Italy
| | - T Favero
- Alto Trevigiano Servizi, Via Schiavonesca Priula, 86 Montebelluna, TV, Italy
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Mahmoud MA. Preparation of magnetic nanomaterial for U (VI) uptake from the aqueous solution. JOURNAL OF SAUDI CHEMICAL SOCIETY 2021. [DOI: 10.1016/j.jscs.2021.101214] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Ionic liquid-multi-walled carbon nanotubes modified screen-printed electrodes for sensitive electrochemical sensing of uranium. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-020-07573-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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El Gammal EM, Ahmed SH. Comparison of four analytical techniques for determining uranium in different rock samples. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06911-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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10
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Abutaleb A, Tayeb AM, Mahmoud MA, Daher AM, Desouky OA, Bakather OY, Farouq R. Removal and recovery of U(VI) from aqueous effluents by flax fiber: Adsorption, desorption and batch adsorber proposal. J Adv Res 2019; 22:153-162. [PMID: 31969996 PMCID: PMC6965726 DOI: 10.1016/j.jare.2019.10.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 10/10/2019] [Accepted: 10/27/2019] [Indexed: 11/08/2022] Open
Abstract
Removal and recovery of uranium were investigated in a batch process. Adsorbent characteristics were scientifically analyzed. The maximum obtained U(VI) removal was ≈94.50% at pH of 4 and adsorbent dose of 1.2 g. Adsorption data were analyzed using kinetic, isotherm and thermodynamic models. Full scale batch adsorber unit was recommended.
Flax fiber (Linen fiber), a valuable and inexpensive material was used as sorbent material in the uptake of uranium ion for the safe disposal of liquid effluent. Flax fibers were characterized using BET, XRD, TGA, DTA and FTIR analyses, and the results confirmed the ability of flax fiber to adsorb uranium. The removal efficiency reached 94.50% at pH 4, 1.2 g adsorbent dose and 100 min in batch technique. Adsorption results were fitted well to the Langmuir isotherm. The recovery of U (VI) to form yellow cake was investigated by precipitation using NH4OH (33%). The results show that flax fibers are an acceptable sorbent for the removal and recovery of U (VI) from liquid effluents of low and high initial concentrations. The design of a full scale batch unit was also proposed and the necessary data was suggested.
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Affiliation(s)
- A Abutaleb
- Chemical Engineering Department, College of Engineering, Jazan University, Jazan, Saudi Arabia
| | - Aghareed M Tayeb
- Minia University, College of Engineering, Chemical Engineering Department, Egypt
| | - Mohamed A Mahmoud
- Chemical Engineering Department, College of Engineering, Jazan University, Jazan, Saudi Arabia.,Nuclear Material Authority, Cairo, Egypt
| | - A M Daher
- Nuclear Material Authority, Cairo, Egypt
| | | | - Omer Y Bakather
- Chemical Engineering Department, College of Engineering, Jazan University, Jazan, Saudi Arabia.,Chemical Engineering Department, College of Engineering, Hadhramout University, Mukalla, Yemen
| | - Rania Farouq
- Petrochemical Engineering Department, Pharos University, Alexandria, Egypt
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Role of biomolecules in selective extraction of U(VI) using an aqueous biphasic system. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06494-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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12
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Al-Muqrin A, El-Sharkawy A, Abdellah WM. Uranium content in groundwater by laser fluorimetry; method validation and dose assessment. JOURNAL OF RADIOLOGICAL PROTECTION : OFFICIAL JOURNAL OF THE SOCIETY FOR RADIOLOGICAL PROTECTION 2018; 38:1140-1146. [PMID: 30063218 DOI: 10.1088/1361-6498/aad71e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this study, the total uranium concentration was determined in groundwater samples used for irrigation and/or drinking purposes and collected from private wells in Al Sharqiya region, Saudi Arabia. The uranium concentrations were measured by laser fluorimetry preceded by radiochemical treatment to eliminate the quenching effect due to the high total dissolved solids content in the groundwater samples. For method validation, some of the measured samples were analyzed for uranium isotopic activities and measured by alpha spectrometry. The results of the uranium concentrations obtained by laser fluorimetry and alpha spectrometry were in good agreement. The uranium concentrations in all the samples were below the World Health Organization (WHO) recommended limit of 30 μg L-1. Two different approaches were followed to assess the annual effective dose from the ingestion of uranium in the analyzed groundwater samples. The annual effective doses determined by the two approaches were found to be in agreement, and varied from 2.9 to 10.2 μSv y-1, with a mean value of 6.1 μSv y-1, which is far below the WHO recommended level of 100 μSv/y. The modified laser fluorimetric procedure was found to be a good tool compared with other techniques for direct measurement of uranium concentrations in high total dissolved solids groundwater samples at low levels.
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Affiliation(s)
- A Al-Muqrin
- Physics Department, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428 , Riyadh11671, Saudi Arabia
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Sensitive quantification of uranium using cloud point extraction coupled with inductively coupled plasma-optical emission spectrometry. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5642-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Determination of specific alpha-emitting radionuclides (uranium, plutonium, thorium and polonium) in water using [Ba+Fe]-coprecipitation method. Appl Radiat Isot 2017; 130:162-171. [PMID: 28968588 DOI: 10.1016/j.apradiso.2017.09.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 07/27/2017] [Accepted: 09/22/2017] [Indexed: 11/23/2022]
Abstract
The indicative dose (ID) is one of the parameters established in the current European directive for water intended for human consumption. To determine the ID, it is necessary to know the activity concentration of: 238U, 234U, 226Ra, 210Po, 239,240Pu and 241Am. The existing methods to determine these radionuclides involve complex radiochemical separations (ionic exchange columns, extraction chromatography, etc.), followed by measurements with a semiconductor detector, laboratory procedures that are time-consuming and costly. As a lower cost alternative that reduces measuring and preparation times, avoids the need for a self-absorption correction and the use of tracers, and above all that can be used in any laboratory, methods based on liquid-liquid extraction and selective co-precipitation were developed. These methodologies offer high separation recovery and selectivity, and the measurements are made using a gas proportional counter or a solid ZnS(Ag) scintillation counter. The separation factor ranged between 91.4% and 100.0% for all alpha-emitting radionuclides across the different methods. The activity concentration for each method was computed through linear equations that represent the relationship between the activity and selectivity of the different alpha-emitting radionuclides. This mathematical procedure simplifies the radiochemical separations and provides more accurate activity concentrations. The results of the internal and external validation studies proved that the proposed method is suitable for determining 241Am, 226Ra, uranium, plutonium, thorium and 210Po in water samples.
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Comparison of radiometric and non-radiometric methods for uranium determination in groundwater of Punjab, India. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-4132-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Determination of uranium concentration and speciation in natural granitic groundwater using TRLFS. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-3971-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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A comparative study for the determination of uranium and uranium isotopes in granitic groundwater. J Radioanal Nucl Chem 2014. [DOI: 10.1007/s10967-014-3699-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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18
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On-site monitoring of uranium in low level liquid waste streams using U-Br-PADAP strip indicator paper technique. J Radioanal Nucl Chem 2014. [DOI: 10.1007/s10967-014-3664-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Standardization of solvent extraction procedure for determination of uranium in seawater. J Radioanal Nucl Chem 2014. [DOI: 10.1007/s10967-014-3410-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Radioanalytical techniques for the determination of 238U, 226Ra and 210Pb in the environment. ACTA ACUST UNITED AC 2013. [DOI: 10.1524/ract.2013.2052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Summary
Different radiometric techniques for the determination of 238U, 226Ra and 210Pb are presented and compared in terms of detection limits with mass spectrometric techniques. It can be concluded that when samples with low activity concentrations have to be measured, the method of choice in the case of 238U should be either RNAA/INAA or alpha particle spectrometry. In the case of 226Ra and 210Pb the best performance can be expected by the alpha spectrometry, whereas drawback of waiting for establishing secular radioactive equilibrium of 210Pb with 210Po makes techniques like beta counting and LSC more attractive for the determination of 210Pb. In addition, a case study on monitoring the former uranium mine Žirovski vrh is presented along with the used methodology and the summarised measurement results.
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Davarani SSH, Moazami HR, Keshtkar AR, Banitaba MH, Nojavan S. A selective electromembrane extraction of uranium (VI) prior to its fluorometric determination in water. Anal Chim Acta 2013; 783:74-9. [DOI: 10.1016/j.aca.2013.04.045] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2013] [Revised: 04/13/2013] [Accepted: 04/15/2013] [Indexed: 10/26/2022]
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Shrivastava A, Sharma J, Soni V. Various electroanalytical methods for the determination of uranium in different matrices. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.bfopcu.2012.09.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Uranium determination using atomic spectrometric techniques: An overview. Anal Chim Acta 2010; 674:143-56. [DOI: 10.1016/j.aca.2010.06.010] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Revised: 06/08/2010] [Accepted: 06/09/2010] [Indexed: 11/24/2022]
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Kalyan Y, Pandey AK, Naidu GRK, Reddy AVR. Membrane optode for uranium(VI) ions preconcentration and quantification based on a synergistic combination of 4-(2-thiazolylazo)-resorcinol with 8-hydroxyquinaldine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 74:1235-1241. [PMID: 19879185 DOI: 10.1016/j.saa.2009.09.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2009] [Revised: 08/27/2009] [Accepted: 09/25/2009] [Indexed: 05/28/2023]
Abstract
A membrane optode was developed utilizing the 8-hydroxyquinaldine (HQ) facilitated preconcentration of UO(2)(2+) ions and subsequent colored complex formation of UO(2)(2+) with 4-(2-thiazolylazo)-resorcinol (TAR) in optode matrix. The composition of the membrane optode was optimized by scanning several extractants immobilized in different plasticized polymer matrices. It was observed that the chelating agent HQ along with an indicator TAR immobilized in the tri-(2-ethylhexyl)phosphate (TEHP) plasticized cellulose triacetate matrix (CTA) was best suited as an optode for the UO(2)(2+) ions in aqueous samples. On sorption of UO(2)(2+) in the optode matrix, TAR changes color of the optode from yellow to magenta having a maximum absorbance (lambda(max)) at 546 nm. The uptake of UO(2)(2+) ions in the optode was found to be pH dependent and was maximum (>90%) at pH above 3. The acetate buffer (0.1 mol L(-1) sodium acetate + 0.1 mol L(-1) acetic acid) was found to be necessary for the stable response. The optimum equilibration time for the optode (2 cm x 1 cm) was found to be 30 min in 10 mL aqueous sample containing acetate buffer (pH 4.75). The equilibration time was found to increase with increase in aqueous sample volume. The optode response was found to be linear in the UO(2)(2+) ions concentration range of 0.01-0.11 micromol L(-1) in tap water as well as aqueous solutions containing 0.1 mol L(-1) NaCl or NaNO(3). The tolerance to the presence of several cations and anions in the determination of UO(2)(2+) ion was studied. It was observed that the optode in the presence of buffer can tolerate presence of large amounts of interfering cations (Ce(4+), V(4+), Eu(3+), Al(3+), Fe(3+), Ni(2+), Cd(2+), Co(2+), Pb(2+), Hg(2+), Cu(2+) and Th(4+) ions) without hindering the sorption of UO(2)(2+) ions in the optode matrix. The present work indicated that 50 ppb UO(2)(2+) ions in 100 mL sample can easily be quantified using this optode. The optode was found to be fully reversible, can readily be regenerated by equilibrating it with 0.1 mol L(-1) HNO(3) and reusable up to three cycles. The applicability of the developed optode in real samples was studied by determining uranium in the ground water samples spiked with a known quantity of UO(2)(2+) ions.
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Affiliation(s)
- Y Kalyan
- Department of Environmental Sciences, S.V. University, Tirupati 517 502, India
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Sahoo SK, Mohapatra S, Chakrabarty A, Sumesh CG, Jha VN, Tripathi RM, Puranik VD. Distribution of uranium in drinking water and associated age-dependent radiation dose in India. RADIATION PROTECTION DOSIMETRY 2009; 136:108-113. [PMID: 19700497 DOI: 10.1093/rpd/ncp147] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Exposure due to natural radiation is of particular importance because it accounts for the largest contribution (nearly 85 %) to the total collective dose of the world population. An attempt has been made to present the feasibility of uranium occurrence in drinking water samples from different states of India, by laser-induced fluorimetry. The associated age-dependent radiation dose was estimated by taking the prescribed water intake values of different age groups. The concentration of uranium obtained, i.e. 0.1 +/- 0.01 to 19.6 +/- 1.8 microg l(-1), is well below the drinking water guideline value of 30 microg l(-1). The annual ingestion dose due to uranium in drinking water for various age groups is found to vary from 0.14 to 48 microSv y(-1).
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Affiliation(s)
- S K Sahoo
- Environmental Assessment Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
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Galindo C, Mougin L, Nourreddine A. An improved radiochemical separation of uranium and thorium in environmental samples involving peroxide fusion. Appl Radiat Isot 2007; 65:9-16. [PMID: 16831555 DOI: 10.1016/j.apradiso.2006.05.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2005] [Revised: 04/19/2006] [Accepted: 05/17/2006] [Indexed: 11/22/2022]
Abstract
A radiochemical procedure for the accurate determination of uranium and thorium using peroxide fusion followed by ion exchange and extraction chromatography is described. The method of extraction of the element from solid samples is the most important factor in the investigation. It is demonstrated, by measuring a number of reference materials, that fusion with Na(2)O(2) ensures a complete destruction of the mineral lattice and greatly improves the determination of the true activity of actinides.
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Affiliation(s)
- C Galindo
- Institut Pluridisciplinaire Hubert-Curien UMR 7178 CNRS and Université Louis Pasteur 23, rue du Loess, BP28, 67037 Strasbourg Cedex 2, France.
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