Uranium mobility in organic matter-rich sediments: A review of geological and geochemical processes

Cumberland, Susan A.; Douglas, Grant; Grice, Kliti; Moreau, John W.

doi:10.1016/j.earscirev.2016.05.010

Cited by 304 publications

(185 citation statements)

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“…This is important for modeling uranium transport in natural waters, but also has importance in Mn hydroxide precipitation steps during radiochemical separations protocols [214,215]. In addition, U(VI) species readily interacts with organic matter associated with soil particles [209] and adsorbs to the organic ligands present in separation columns [216]. Vibrational spectra can provide chemical insight via band frequencies and bandwidths, both of which that aid in the characterization of uranyl surface species and local environmental conditions.…”

Section: Surface Speciation Studied By Ir and Raman Spectroscopiesmentioning

confidence: 99%

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

Haes

Forbes

2018

Coordination Chemistry Reviews

120

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: Surface Speciation Studied By Ir and Raman Spectroscopiesmentioning

confidence: 99%

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

Haes

Forbes

2018

Coordination Chemistry Reviews

120

128

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“…Using the basic Th/U plot, and the dysoxic/oxic boundary at Th/U ~3 in shales, then not only were most of the Khunamuh argillites and some limestones in the dysoxic field, but so were almost all the Zewan sandstones, which have no other evidence for dysoxia ( Figure 23). Using Th/U ratios as indicators of anoxia, however, is more complex than earlier studies indicated , and the importance of organic matter in U geochemistry is only now being thoroughly investigated (Cumberland et al, 2016). Using Th/U ratios as indicators of anoxia, however, is more complex than earlier studies indicated , and the importance of organic matter in U geochemistry is only now being thoroughly investigated (Cumberland et al, 2016).…”

Section: Redox Conditionsmentioning

confidence: 99%

“…Disregarding the Zewan sandstones, there is a rapid shift towards dysoxia (just after a short oxic phase) above the Late Permian Event Horizon (LPEH) at Guryul as there is elsewhere (Brennecka et al, 2011). Using Th/U ratios as indicators of anoxia, however, is more complex than earlier studies indicated , and the importance of organic matter in U geochemistry is only now being thoroughly investigated (Cumberland et al, 2016).…”

Section: Redox Conditionsmentioning

confidence: 99%

Palaeoenvironments and elemental geochemistry across the marine Permo‐Triassic boundary section, Guryul Ravine (Kashmir, India) and a comparison with other North Indian passive margin sections

Brookfield

Stebbins

Williams

et al. 2019

The Depositional Record

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The Guryul Permian-Triassic sediments were deposited on a passive margin in a partially enclosed basin, at a latitude of about 45°S along the southern margin of the Neotethys Ocean. The closest modern analogy is the Japan Sea rotated into a southern hemisphere orientation. Guryul element variations are subdued, mostly lithological, and take place across the change from the dominantly sandy shallow-water Permian Zewan Formation into the dominantly shaly deeper-water latest Permian-Triassic Khunamuh Formation, and not at the palaeontological Permian-Triassic boundary.The overall geochemistry of the Guryul sediments is very similar to that of the Ulleung Basin in the Japan Sea, where the sediments are 40%-60% eolian from loess and redeposited loess in the North China Basin. The overall Guryul geochemistry indicates that the sediments were derived from dominantly silica-rich continental rather than silica-poor sources although with some more silica-poor inputs at times. Element ratios suggest increasing aridity and wind abrasion across the Permian-Triassic boundary. Various geochemical redox proxies suggest mainly oxic depositional conditions, with episodes of anoxia, but with little systematic variation across the extinction boundary. Productivity proxies suggest a slight decrease across the Permian-Triassic boundary, and at least one more decreased interval in the Early Triassic. The similar geochemistry of other localities indicate that the Guryul geochemical changes are regional in extent and representative of the North Indian Permian-Triassic passive margin. The lack of consistent element geochemical changes across the boundary accompanied by significant C, S, and other isotopic changes suggests that atmospheric and oceanic chemistry rather than physical changes, such as provenance, climate and sea-level changes, drove the Permian-Triassic environmental changes and extinctions at least on the mid-latitude Tethyan shelf of northern India. K E Y W O R D S Extinction, geochemistry, Kashmir, Permian-Triassic 76 | BROOKFIELD Et aL. F I G U R E 1 Late Permian palaeogeography (courtesy of Chris Scotese): Early Triassic "dead zone" from Sun et al. (2012); Winds from Kiehl and Shields (2005). Locations of cited Permo-Triassic boundary section in open circles with names in bold face 78 | BROOKFIELD Et aL. F I G U R E 8 Biostratigraphy of the Guryul Permian-Triassic boundary section showing stratigraphic range of fossils and number of species in each subdivision (data from Nakazawa et al., 1975). Bryo -bryozoans. Gastr -gastropods. Note that there is little extinction at the Zewan-Khunamuh Formation boundary and the main extinction (and new species appearance) is at the FAD of Hindeodus parvus, and the first inferred anoxic level marked by pyrite framboids.

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“…Accumulated uranium is located within the cell, either in the periplasm or cytoplasm, but must have traversed at least one membrane (Figure 2.4). Like biosorption, Cellulomonas [72] and fungi [16] have been shown to accumulate impressive amounts of uranium.…”

Section: Accumulationmentioning

confidence: 99%

“…An open question for researchers in the field has been whether these transformations are detoxification, resistance or just accidents of chemistry? Previous reviews have discussed uranium reduction [12], uranium bioremediation methods [13] [15], uranium geochemistry, mineralization and groundwater transport [3] [16]. While all substantial and important reviews, the previous work has focused only on the most well-known organisms and do not consider the drivers of these processes or the biological benefit to the microbe beyond mentions of possible detoxification.…”

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confidence: 99%

Uranium Bio-Transformations: Chemical or Biological Processes?

Majumder¹,

Wall²

2017

OJIC

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Uranium bio-transformations are the many and varying types of interactions that microbes can have with uranium encountered in their environment. In this review, bio-transformations, including reduction, oxidation, respiration, sorption, mineralization, accumulation, precipitation, biomarkers, and sensors are defined and discussed. Consensus and divergences are noted in bioavailability, mechanism of uranium reduction, environment, metabolism and the type of organism. The breadth of organisms with characterized bio-trans formations is also cataloged and discussed. We further debate if uranium biotransformations provide bio-protection or bio-benefit to the microbe and highlight the need for more work in the field to understand if microbes use uranium reduction for energy gain and growth, as having the ability is separate from exercising it. The presentation centers on the fundamental drivers for these processes with an additional exposition of the essential contribution of inorganic chemistry techniques to the molecular characterization of these biological processes.

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Uranium mobility in organic matter-rich sediments: A review of geological and geochemical processes

Cited by 304 publications

References 315 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

Palaeoenvironments and elemental geochemistry across the marine Permo‐Triassic boundary section, Guryul Ravine (Kashmir, India) and a comparison with other North Indian passive margin sections

Uranium Bio-Transformations: Chemical or Biological Processes?

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