scholarly journals Thermodynamic and structural aspects of the aqueous uranium(iv) system – hydrolysis vs. sulfate complexation

2019 ◽  
Vol 48 (48) ◽  
pp. 17898-17907
Author(s):  
Susanne Lehmann ◽  
Harald Foerstendorf ◽  
Thomas Zimmermann ◽  
Michael Patzschke ◽  
Frank Bok ◽  
...  
Keyword(s):  
Quantum Chemical Calculations ◽  
Optical Spectroscopy ◽  
Quantum Chemical ◽  
Sulfate Solution ◽  
Thermodynamic Modelling ◽  
Acidic Sulfate ◽  
Acidic Sulfate Solution ◽  
Structural Aspects

The aquatic speciation of U(iv) in acidic sulfate solution were studied by optical spectroscopy, quantum-chemical calculations, and thermodynamic modelling.

The Electrochemical Corrosion of Bulk Nanocrystalline Ingot Iron in Acidic Sulfate Solution

2006 ◽  
Vol 110 (1) ◽  
pp. 377-382 ◽  
Author(s):  
S. G. Wang ◽  
C. B. Shen ◽  
K. Long ◽  
T. Zhang ◽  
F. H. Wang ◽  
...  
Keyword(s):  
Electrochemical Corrosion ◽  
Sulfate Solution ◽  
Acidic Sulfate ◽  
Acidic Sulfate Solution ◽  
Bulk Nanocrystalline

scholarly journals The Anodic Dissolution Behavior of Oxide Films Formed on Annealed Stainless Steels in Acidic Sulfate Solution

1993 ◽  
Vol 42 (9) ◽  
pp. 576-584 ◽  
Author(s):  
Ryo Matsuhashi ◽  
Satoshi Ito ◽  
Michio Nakata ◽  
Yuusuke Oikawa ◽  
Keiichi Ohmura
Keyword(s):  
Anodic Dissolution ◽  
Stainless Steels ◽  
Oxide Films ◽  
Sulfate Solution ◽  
Dissolution Behavior ◽  
Acidic Sulfate ◽  
Acidic Sulfate Solution

Performance evaluation of hollow fiber renewal liquid membrane for extraction of uranium(VI) from acidic sulfate solution

2018 ◽  
Vol 106 (3) ◽  
pp. 181-189 ◽  
Author(s):  
Fazel Zahakifar ◽  
Amir Charkhi ◽  
Meisam Torab-Mostaedi ◽  
Reza Davarkhah
Keyword(s):  
Flow Rate ◽  
Hollow Fiber ◽  
Liquid Membrane ◽  
Sulfate Solution ◽  
Shell Side ◽  
Alamine 336 ◽  
Acidic Sulfate ◽  
Acidic Sulfate Solution ◽  
Side Flow ◽  
Acceptor Phase

AbstractThe performance of the hollow fiber renewal liquid membrane (HFRLM) in the continuous and recycling modes for the extraction of uranium(VI) from the acidic sulfate solution has been investigated. Alamine 336 diluted in kerosene was used as a carrier in liquid membrane (LM) phase. In the batch experiments, the effects of sulfuric acid, extractant and uranium(VI) concentration were studied and the optimum concentration of the donor and LM phases were determined 0.15 mol L−1and 0.0125 mol L−1, respectively. Various parameters affecting the HFRLM performance including the lumen and shell side flow rate, organic/aqueous volume ratio, acceptor phase type and concentration of carrier and acceptor phase were studied. The mass transfer flux increases with increasing the lumen side flow rates and the shell side flow rate did not have any significant effect. The uranium transfer flux increases with increasing O/A ratio, acceptor and Alamine 336 concentration, and reaches a maximum value at 1/20, 0.5 mol L−1and 0.0125 mol L−1, respectively. Further increase in these parameters result in uranium transfer decrement. The results show that liquid membrane phase is a rate-controlling step. Among the investigated acceptor phases, 0.5 mol L−1NH4Cl result in 60.35% uranium(VI) recovery in the recycling mode.

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