scholarly journals A Systematic Ion Exchange Separation of Metallic Elements. I. Group Separation of Metallic Elements by Anion Exchange with Hydrochloric Acid

1962 ◽  
Vol 35 (3) ◽  
pp. 416-419 ◽  
Author(s):  
Jun Yoshimura ◽  
Hirohiko Waki
Keyword(s):  
Hydrochloric Acid ◽  
Ion Exchange ◽  
Anion Exchange ◽  
Metallic Elements ◽  
Group Separation ◽  
Ion Exchange Separation

Ion-exchange separation of radioiodine and its application to production of 124I by alpha particle induced reactions on antimony

2015 ◽  
Vol 103 (8) ◽  
Author(s):  
Md. Shuza Uddin ◽  
Syed M. Qaim ◽  
Alex Hermanne ◽  
Ingo Spahn ◽  
Stefan Spellerberg ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Anion Exchange ◽  
Alpha Particle ◽  
Radiochemical Separation ◽  
Anion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Ion Exchange Separation ◽  
Basic Parameters

AbstractThe basic parameters related to radiochemical separation of iodine from tellurium and antimony by anion-exchange chromatography using the resin Amberlyst A26 were studied. The separation yield of

ION Exchange Characterisation of Modified Zeolite

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2269-2272 ◽  
Author(s):  
Š Cerjan-Stefanovic ◽  
M. Kaštelan-Macan ◽  
T. Filipan
Keyword(s):  
Drinking Water ◽  
Ion Exchange ◽  
Anion Exchange ◽  
Natural Zeolite ◽  
Deionized Water ◽  
Isomorphous Substitution ◽  
Waste Waters ◽  
Modified Zeolite ◽  
Water Drinking

Isomorphous substitution of phosphorus into a natural zeolite affords the possibility to change the overall framework charge from negative to positive. The substances so created should be used for purification of waste waters. The work describes the preparation of phosphated zeolite, their characterisation and examples of their anion exchange of NO3 on observed in deionized water, drinking water and in the solution containing varying amounts of nitrate.

Decreasing waste brine volume from anion exchange with nanofiltration: implications for multiple treatment cycles

2021 ◽  
Author(s):  
Julie A. Korak ◽  
Leah C. Flint ◽  
Miguel Arias-Paić
Keyword(s):  
Ion Exchange ◽  
Anion Exchange ◽  
Hexavalent Chromium ◽  
Implementation Cost ◽  
Multiple Treatment ◽  
Brine Disposal ◽  
Brine Volume ◽  
Regeneration Cycle

Ion exchange (IX) removes hexavalent chromium from water, but waste brine disposal makes implementation cost-prohibitive in many communities. Nanofiltration treats waste brine for reuse in the next regeneration cycle.

scholarly journals Transport Characteristics of CJMAED™ Homogeneous Anion Exchange Membranes in Sodium Chloride and Sodium Sulfate Solutions

2021 ◽  
Vol 22 (3) ◽  
pp. 1415
Author(s):  
Veronika Sarapulova ◽  
Natalia Pismenskaya ◽  
Valentina Titorova ◽  
Mikhail Sharafan ◽  
Yaoming Wang ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Anion Exchange ◽  
Volume Fraction ◽  
Exchange Capacity ◽  
Polymer Materials ◽  
Transport Numbers ◽  
Anion Exchange Membranes ◽  
Microheterogeneous Model ◽  
Pass Through ◽  
Pes Membrane

The interplay between the ion exchange capacity, water content and concentration dependences of conductivity, diffusion permeability, and counterion transport numbers (counterion permselectivity) of CJMA-3, CJMA-6 and CJMA-7 (Hefei Chemjoy Polymer Materials Co. Ltd., China) anion-exchange membranes (AEMs) is analyzed using the application of the microheterogeneous model to experimental data. The structure–properties relationship for these membranes is examined when they are bathed by NaCl and Na2SO4 solutions. These results are compared with the characteristics of the well-studied homogenous Neosepta AMX (ASTOM Corporation, Japan) and heterogeneous AMH-PES (Mega a.s., Czech Republic) anion-exchange membranes. It is found that the CJMA-6 membrane has the highest counterion permselectivity (chlorides, sulfates) among the CJMAED series membranes, very close to that of the AMX membrane. The CJMA-3 membrane has the transport characteristics close to the AMH-PES membrane. The CJMA-7 membrane has the lowest exchange capacity and the highest volume fraction of the intergel spaces filled with an equilibrium electroneutral solution. These properties predetermine the lowest counterion transport number in CJMA-7 among other investigated AEMs, which nevertheless does not fall below 0.87 even in 1.0 eq L−1 solutions of NaCl or Na2SO4. One of the reasons for the decrease in the permselectivity of CJMAED membranes is the extended macropores, which are localized at the ion-exchange material/reinforcing cloth boundaries. In relatively concentrated solutions, the electric current prefers to pass through these well-conductive but nonselective macropores rather than the highly selective but low-conductive elements of the gel phase. It is shown that the counterion permselectivity of the CJMA-7 membrane can be significantly improved by coating its surface with a dense homogeneous ion-exchange film.

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