Sorption of Heavy Metals onto Selective Ion-Exchange Resins with Aminophosphonate Functional Groups

2001 ◽  
Vol 40 (21) ◽  
pp. 4570-4576 ◽  
Author(s):  
Randolf Kiefer ◽  
Wolfgang H. Höll
Keyword(s):  
Heavy Metals ◽  
Ion Exchange ◽  
Functional Groups ◽  
Ion Exchange Resins ◽  
Exchange Resins

CO2 Absorption over Ion Exchange Resins: The Effect of Amine Functional Groups and Microporous Structures

2020 ◽  
Vol 59 (38) ◽  
pp. 16507-16515
Author(s):  
Xueru Wang ◽  
Juzheng Song ◽  
Yan Chen ◽  
Hang Xiao ◽  
Xiaoyang Shi ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Functional Groups ◽  
Ion Exchange Resins ◽  
Co2 Absorption ◽  
Exchange Resins

A model for the thermal regeneration of ion-exchange resins, Part II

1971 ◽  
Vol 24 (12) ◽  
pp. 2439 ◽  
Author(s):  
SD Hamann
Keyword(s):  
Ion Exchange ◽  
Functional Groups ◽  
Ionization Constant ◽  
Ion Pairs ◽  
Ion Exchange Resins ◽  
Thermal Regeneration ◽  
Degree Of Ionization ◽  
Titration Curves ◽  
Two Factors ◽  
Exchange Resins

The model described in Part I1 has been extended to allow for two factors which may explain the abnormally flat titration curves of some amine ion-exchange resins. They are (a) the possible formation of ion pairs within a resin and (b) a possible increase in the ionization constant of the functional groups in a resin as its degree of ionization increases. It is suggested that the change (b) may occur if the di- electric constant of a resin is increased sufficiently by the absorption of ions and water as titration proceeds. ��� Calculations have been made of the influence of both effects on thermal regeneration equilibria.

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