Equilibrium studies of sodium-ammonium potassium-ammonium, and calcium-ammonium exchanges on clinoptilolite zeolite
Abstract
Forward and reverse ion-exchange isotherms for the binary sodium-ammonium, potassium-ammonium, and calcium-ammonium systems on clinoptilolite have been measured in aqueous solutions at a total concentration of 0.1 equiv/dm{sup 3} and at 298 K. Prior to exchange experiments it was attempted to prepare homoionic forms of the zeolite by exhaustive treatments with appropriate salt solutions of cations. With no binary exchanges, full replacement of the cation by the ammonium ion is observed, which conflicts with some earlier work on clinoptilolite. Despite the observed partial exchange levels, clinoptilolite shows a very high preference for ammonium ion over sodium and calcium but not over potassium. Thermodynamic values for the exchanges were calculated and compared with data in the literature. Both the selectivity and thermodynamic affinity sequence, in agreement with previous work reported in the literature, are K{sup +} > NH{sub 4}{sup +} > Na{sup +} > Ca{sup 2+}.
- Authors:
-
- Middle East Technical Univ., Ankara (Turkey)
- Publication Date:
- OSTI Identifier:
- 6108840
- Resource Type:
- Journal Article
- Journal Name:
- Separation Science and Technology; (USA)
- Additional Journal Information:
- Journal Volume: 24:15; Journal ID: ISSN 0149-6395
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; AMMONIA; SEPARATION PROCESSES; AMMONIUM COMPOUNDS; CLINOPTILOLITE; EXPERIMENTAL DATA; ION EXCHANGE MATERIALS; THERMODYNAMIC PROPERTIES; WASTE WATER; WATER POLLUTION; DATA; HYDRIDES; HYDROGEN COMPOUNDS; INFORMATION; INORGANIC ION EXCHANGERS; LIQUID WASTES; MATERIALS; MINERALS; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; NUMERICAL DATA; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POLLUTION; SILICATE MINERALS; WASTES; WATER; ZEOLITES; 540320* - Environment, Aquatic- Chemicals Monitoring & Transport- (1990-)
Citation Formats
Jama, M A, and Yuecel, H. Equilibrium studies of sodium-ammonium potassium-ammonium, and calcium-ammonium exchanges on clinoptilolite zeolite. United States: N. p., 1989.
Web. doi:10.1080/01496398908050659.
Jama, M A, & Yuecel, H. Equilibrium studies of sodium-ammonium potassium-ammonium, and calcium-ammonium exchanges on clinoptilolite zeolite. United States. https://doi.org/10.1080/01496398908050659
Jama, M A, and Yuecel, H. 1989.
"Equilibrium studies of sodium-ammonium potassium-ammonium, and calcium-ammonium exchanges on clinoptilolite zeolite". United States. https://doi.org/10.1080/01496398908050659.
@article{osti_6108840,
title = {Equilibrium studies of sodium-ammonium potassium-ammonium, and calcium-ammonium exchanges on clinoptilolite zeolite},
author = {Jama, M A and Yuecel, H},
abstractNote = {Forward and reverse ion-exchange isotherms for the binary sodium-ammonium, potassium-ammonium, and calcium-ammonium systems on clinoptilolite have been measured in aqueous solutions at a total concentration of 0.1 equiv/dm{sup 3} and at 298 K. Prior to exchange experiments it was attempted to prepare homoionic forms of the zeolite by exhaustive treatments with appropriate salt solutions of cations. With no binary exchanges, full replacement of the cation by the ammonium ion is observed, which conflicts with some earlier work on clinoptilolite. Despite the observed partial exchange levels, clinoptilolite shows a very high preference for ammonium ion over sodium and calcium but not over potassium. Thermodynamic values for the exchanges were calculated and compared with data in the literature. Both the selectivity and thermodynamic affinity sequence, in agreement with previous work reported in the literature, are K{sup +} > NH{sub 4}{sup +} > Na{sup +} > Ca{sup 2+}.},
doi = {10.1080/01496398908050659},
url = {https://www.osti.gov/biblio/6108840},
journal = {Separation Science and Technology; (USA)},
issn = {0149-6395},
number = ,
volume = 24:15,
place = {United States},
year = {Fri Dec 01 00:00:00 EST 1989},
month = {Fri Dec 01 00:00:00 EST 1989}
}