The hydrothermal uranium and some other metal deposits of the extensional faulting during the advanced opening of the Red Sea, Central Eastern Desert, Egypt

Mahmoud, Soliman Abu Elatta A.; Mansour, Gehad

doi:10.1016/j.bjbas.2018.11.002

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…Furthermore, our results show a positive relationship of 222 Rn with post-transition metals Al and Pb, which are also related to U activity concentration . The predominant relationship of all these metals with U (and 222 Rn) has been extensively described in the scientific literature, as most of these compounds co-occur, for example, in polymetallic deposits of hydrothermal origin …”

Section: Resultssupporting

confidence: 64%

“…50 The predominant relationship of all these metals with U (and 222 Rn) has been extensively described in the scientific literature, as most of these compounds co-occur, for example, in polymetallic deposits of hydrothermal origin. 51 The results from Kendall's τ correlation highlight the complexities associated with predicting 222 Rn activity concentration based on ancillary geochemical data. The analysis indicates that the potential for the host aquifer to produce 222 Rn is the principal factor controlling 222 Rn activity in groundwater.…”

Section: Resultsmentioning

confidence: 98%

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Patterns in Radon Activity in California Groundwater

Grande

Moran

2021

ACS EST Water

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Naturally occurring radon-222 ( 222 Rn) is an effective marker of groundwater inflow to streams, lakes, and coastal environments. However, 222 Rn activity in groundwater is difficult to predict, and existing data are rarely interpreted in a hydrogeologic context. A total of 3582 dissolved 222 Rn samples in groundwater, 302 streamwater samples, and 10 samples from springs across California were used to understand the large-scale patterns of 222 Rn in the state's groundwater. In addition to 222 Rn activity, 54 additional analytes for the same samples together with surficial geology and well depth were used to assess controls on 222 Rn in groundwater. The results show that the lithology of the host formation is the most reliable predictor of 222 Rn activity in groundwater and that 222 Rn activity in groundwater is correlated most strongly with radiological (parent) constituents, further implicating the importance of the host lithology/mineralogy. We created a map of interpolated 222 Rn activity in groundwater across California, which should be a valuable reference for investigations of surface water−groundwater exchanges and potential health effects of 222 Rn in drinking water. The interpolated values from the map provide a rough approximation for experimental planning purposes and for assessing groundwater flux to surface water in areas where groundwater samples are inaccessible.

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Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 98%

Patterns in Radon Activity in California Groundwater

Grande

Moran

2021

ACS EST Water

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“…The concentration of strontium reaches up to 1% (as SrSO 4 mineral). The Quseir-Marsa Alam area is regularly exposed to violent and short rains during the winter season, forming torrents that lead to the transfer of many blocks and/or fragments of rocks (containing SrSO 4 ) to the Red Sea, in addition to natural drainage of strontium-containing solutions [ 118 , 119 ].…”

Section: Appendix A1 Sem and Sem-edx Characterizationsmentioning

confidence: 99%

New Process for the Sulfonation of Algal/PEI Biosorbent for Enhancing Sr(II) Removal from Aqueous Solutions—Application to Seawater

Hamza

Guibal²,

Althumayri

et al. 2022

Molecules

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Sulfonic resins are highly efficient cation exchangers widely used for metal removal from aqueous solutions. Herein, a new sulfonation process is designed for the sulfonation of algal/PEI composite (A*PEI, by reaction with 2-propylene-1-sulfonic acid and hydroxylamine-O-sulfonic acid). The new sulfonated functionalized sorbent (SA*PEI) is successfully tested in batch systems for strontium recovery first in synthetic solutions before investigating with multi-component solutions and final validation with seawater samples. The chemical modification of A*PEI triples the sorption capacity for Sr(II) at pH 4 with a removal rate of up to 7% and 58% for A*PEI and SA*PEI, respectively (with SD: 0.67 g L−1). FTIR shows the strong contribution of sulfonate groups for the functionalized sorbent (in addition to amine and carboxylic groups from the support). The sorption is endothermic (increase in sorption with temperature). The sulfonation improves thermal stability and slightly enhances textural properties. This may explain the fast kinetics (which are controlled by the pseudo-first-order rate equation). The sulfonated sorbent shows a remarkable preference for Sr(II) over competitor mono-, di-, and tri-valent metal cations. Sorption properties are weakly influenced by the excess of NaCl; this can explain the outstanding sorption properties in the treatment of seawater samples. In addition, the sulfonated sorbent shows excellent stability at recycling (for at least 5 cycles), with a loss in capacity of around 2.2%. These preliminary results show the remarkable efficiency of the sorbent for Sr(II) removal from complex solutions (this could open perspectives for the treatment of contaminated seawater samples).

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