scholarly journals Study of effectiveness of strongly basic anion exchange resins in the process of uranium extraction from the underground leaching productive solution

2018 ◽  
pp. 10-15
Author(s):  
Nurgul Nursapina ◽  
Fatima Meiirman ◽  
Gulsana Amanova ◽  
Ilona Matveyeva
Keyword(s):  
Anion Exchange ◽  
Dynamic Condition ◽  
High Sorption Capacity ◽  
Uranium Extraction ◽  
Anion Exchange Resins ◽  
High Sorption ◽  
Basic Anion ◽  
Exchange Resins ◽  
Productive Solution ◽  
Sorption Characteristics

The process of uranium sorption is one of the important stages in the production of uranium. This stage affects uranium extraction effectiveness from productive solutions. The sorption and desorption characteristic of anion exchange resins in dynamic condition were investigated in order to study the effectiveness of resins, which were used for extraction of uranium from sulfuric acid productive solution. The sorption and desorption of uranium from the productive solution on anion exchange resins AB-17 and DOWEX 1X8 200 was carried out in laboratory conditions. The sorption characteristics were investigated. The determined sorption capacities of the resins were 1.47 and 14.4 mg/mL, respectively. The most efficient anion exchanger is DOWEX 1X8 200 that has a high sorption capacity as well as good desorption characteristics, which make it possible to obtain solutions having 23 times higher uranium concentrations than in productive solutions.

scholarly journals Remazol Black B removal from aqueous solutions and wastewater using weakly basic anion exchange resins

2011 ◽  
Vol 9 (5) ◽  
pp. 867-876 ◽  
Author(s):  
Monika Wawrzkiewicz ◽  
Zbigniew Hubicki
Keyword(s):  
Anion Exchange ◽  
Phenol Formaldehyde ◽  
Reactive Dye ◽  
Anion Exchangers ◽  
Phase Contact Time ◽  
Anion Exchange Resins ◽  
Remazol Black B ◽  
Basic Anion ◽  
Exchange Resins ◽  
Remazol Black

AbstractIn this study, the use of the weakly basic anion exchange resins of phenol-formaldehyde (Amberlyst A 23), polyacrylate (Amberlite IRA 67) and polystyrene (Lewatit MonoPlus MP 62) matrices for removal of the reactive dye Remazol Black B (RBB) from aqueous solution and wastewater were investigated. RBB sorption on the anion exchangers was a time dependent process. Color reduction percentiles of 75.2, 33.9 and 25.1% in wastewater treatment were found after 216 h of phase contact time with Lewatit MonoPlus MP 62, Amberlyst A 23 and Amberlite IRA 67, respectively. Inorganic salts and anionic surfactant action influenced RBB uptake by the anion exchangers. The amounts of dye retained by the anion exchangers increased with a rise in temperature. The maximum sorption capacities calculated from the Langmuir model were 66.4, 282.1 and 796.1 mg g−1 for Amberlite IRA 67, Amberlyst A 23 and Lewatit MonoPlus MP 62, respectively. Regeneration of phenol-formaldehyde and polystyrene resins were possible using 1 M NaOH, 2 M KSCN, 1M KSCN in 40–60% methanol as well as 1 M NaOH in 60% methanol.

scholarly journals Inside Cover: Aldol Condensations Catalyzed by Basic Anion-Exchange Resins (ChemCatChem 23/2016)

ChemCatChem ◽  
2016 ◽  
Vol 8 (23) ◽  
pp. 3558-3558
Author(s):  
Werner Bonrath ◽  
Yann Pressel ◽  
Jan Schütz ◽  
Erich Ferfecki ◽  
Klaus-Dieter Topp
Keyword(s):  
Anion Exchange ◽  
Anion Exchange Resins ◽  
Basic Anion ◽  
Exchange Resins
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