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Jia, Guanqing; Belli, M.; Sansone, U.; Rosamilia, Silvia; Ocone, R.; Gaudino, Stefania

doi:10.1023/a:1020413302019

Cited by 45 publications

(6 citation statements)

References 16 publications

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“…Radiometric techniques, such as alpha spectrometry, quantify U in natural systems down to 0.22 mBq/L and provide isotopic ratios of the materials [27]. These methods, however, do not reveal chemical information on speciation or bonding.…”

Section: Introduction To Uranium Chemistrymentioning

confidence: 99%

“…Given the complexity of uranium chemistry in natural waters, it is important to develop tools to assess speciation, characterize solid phases, understand surface processes, and probe chemical mechanisms. Radiometric techniques, such as alpha spectrometry, quantify U in natural systems down to 0.22 mBq/L and provide isotopic ratios of the materials [27]. These methods, however, do not reveal chemical information on speciation or bonding.…”

Section: Introduction To Uranium Chemistrymentioning

confidence: 99%

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Detection and identification of solids, surfaces, and solutions of uranium using vibrational spectroscopy

Haes

Forbes

2018

Coordination Chemistry Reviews

133

128

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The purpose of this review is to provide an overview of uranium speciation using vibrational spectroscopy methods including Raman and IR. Uranium is a naturally occurring, radioactive element that is utilized in the nuclear energy and national security sectors. Fundamental uranium chemistry is also an active area of investigation due to ongoing questions regarding the participation of 5f orbitals in bonding, variation in oxidation states and coordination environments, and unique chemical and physical properties. Importantly, uranium speciation affects fate and transportation in the environment, influences bioavailability and toxicity to human health, controls separation processes for nuclear waste, and impacts isotopic partitioning and geochronological dating. This review article provides a thorough discussion of the vibrational modes for U(IV), U(V), and U(VI) and applications of infrared absorption and Raman scattering spectroscopies in the identification and detection of both naturally occurring and synthetic uranium species in solid and solution states. The vibrational frequencies of the uranyl moiety, including both symmetric and asymmetric stretches are sensitive to the coordinating ligands and used to identify individual species in water, organic solvents, and ionic liquids or on the surface of materials. Additionally, vibrational spectroscopy allows for the in situ detection and real-time monitoring of chemical reactions involving uranium. Finally, techniques to enhance uranium species signals with vibrational modes are discussed to expand the application of vibrational spectroscopy to biological, environmental, inorganic, and materials scientists and engineers.

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Section: Introduction To Uranium Chemistrymentioning

confidence: 99%

Section: Introduction To Uranium Chemistrymentioning

confidence: 99%

Detection and identification of solids, surfaces, and solutions of uranium using vibrational spectroscopy

Haes

Forbes

2018

Coordination Chemistry Reviews

133

128

View full text Add to dashboard Cite

show abstract

“…For the last two decades, efforts to address this fundamental issue have led to the birth of a new research area called ‘speciation’. In the specific case of uranium (U), many studies were conducted to identify the extent and nature of contamination because of U particulate matter spreads in the environment following a nuclear accident, nuclear activities, and use of depleted U as anti‐tank penetrators during recent conflicts …”

Section: Introductionmentioning

confidence: 99%

Use of micro‐Raman spectrometry coupled with scanning electron microscopy to determine the chemical form of uranium compounds in micrometer‐size particles

Pointurier

Marie

2013

J Raman Spectroscopy

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In the frame of nuclear safeguards, knowledge of the chemical form (stoichiometry) of the uranium compounds present in the micrometric particulate material sampled by wiping surfaces in an inspected nuclear facility may point out the industrial process implemented in the installation. Micro-Raman spectroscopy (MRS) coupled with scanning electron microscopy (SEM) has been used for the first time to analyze micrometer-size particles of various uranium oxides [UO 2 , U 3 O 8 , UO 3 , and UO 4 · 4(H 2 O)] deposited on carbon disks. Uranium particles are detected by means of SEM, and Raman analysis is then directly carried out inside the SEM measurement chamber without moving the carbon disk from SEM to MRS. When particles are deposited on appropriate carbon disks (sticky carbon tapes), despite a loss of signal-to-noise ratio of about an order of magnitude with regard to the stand-alone MRS, all uranium oxides are successfully identified in particles by in-SEM Raman analysis, obtaining similar characteristic bands as the ones obtained with the stand-alone MRS. Moreover, with the SEM-MRS coupling, particles as small as 1 μm can be analyzed, whereas, without the SEM-MRS coupling, only particles larger than~5 μm are efficiently analyzed, after localization inside the SEM, transfer of the sample holder into the MRS, and relocation of the particles inside the MRS.Additional supporting information may be found in the online version of this article at the publisher's web site.Determining the chemical form of uranium compounds using micro-Raman spectrometry

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“…Its detection limit is typically 100 to 1000 times lower than γ-spectrometry [4]. This technique is mostly used for detection and analysis of U as well as Th radioisotopes, particularly in the environmental samples, such as natural waters, which are characterized with low radioactivity concentration levels [3,5].…”

Section: Introductionmentioning

confidence: 99%

Measurements of Natural Radioactivity in Some Granite Samples Using Alpha Spectrometric Analysis

Diab¹,

Monged²,

Khattab³

2013

OJAppS

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Alpha spectrometry using pulse height analysis has been used for the determination of uranium concentrations in different environmental samples. The concentration of 238 U was measured by both destructive and non-destructive techniques with a detection limit of less than 1.8 mBq/kg. However, because of the extremely low 234 U concentrations in environmental samples, it was necessary to use a destructive technique to separate U from the sample matrices as well as remove interfering elements from the sample solution to determine 238 U/ 234 U ratio. In this study, the uranium was separated from the environmental samples using anion exchangers in (Dowex 1 × 8 Cl − form) and purified via co-precipitation with Lanthanum fluorides (LaF 3) and the alpha source prepared by electrodeposition. The results obtained were validated using some certified reference samples.

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Untitled

Cited by 45 publications

References 16 publications

Detection and identification of solids, surfaces, and solutions of uranium using vibrational spectroscopy

Detection and identification of solids, surfaces, and solutions of uranium using vibrational spectroscopy

Use of micro‐Raman spectrometry coupled with scanning electron microscopy to determine the chemical form of uranium compounds in micrometer‐size particles

Measurements of Natural Radioactivity in Some Granite Samples Using Alpha Spectrometric Analysis

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