| |
| Web URL(s): | https://acsess.onlinelibrary.wiley.com/doi/10.2136/sssaj1998.03615995006200030011x
Last checked: 03/01/2024
Access conditions: Item is within a limited-access website
Notes: Abstract only
https://acsess.onlinelibrary.wiley.com/doi/epdf/10.2136/sssaj1998.03615995006200030011x
Last checked: 03/01/2024
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Kithome, M.;
Paul, J. W.;
Lavkulich, L. M.;
Bomke, A. A. |
|---|
| Author Affiliation: | Kithome & Paul: Agriculture and Agri-Food Canada, Pacific Agri-Food Research Centre, P.O. Box 1000, Agassiz, BC, Canada V0M 1A0. Lavkulich & Bomke: Department of Soil Science, University of British Columbia, Vancouver, BC, Canada V6T 1Z4. |
|---|
| Title: | Kinetics of ammonium adsorption and desorption by the natural zeolite clinoptilolite |
|---|
| Section: | Division S-2 - soil chemistry
Other records with the "Division S-2 - soil chemistry" Section
|
|---|
| Source: | Soil Science Society of America Journal. Vol. 62, No. 3, May/June 1998, p. 622-629. |
|---|
| Publishing Information: | Madison, WI: Soil Science Society of America |
|---|
| # of Pages: | 8 |
|---|
| Keywords: | TIC Keywords: Kinetics; Adsorption; Desorption; Zeolites; Clinoptilolite; Nitrogen; Models; Ammonia
|
|---|
| Abstract/Contents: | "The kinetics of NH₄⁺ adsorption and desorption were investigated on the natural zeolite clinoptilolite to ascertain its ability to adsorb and release the important plant nutrient N in its NH₄⁺ form at various pH values and initial NH₄⁺ concentrations. Kinetics of NH₄⁺ adsorption were evaluated on the samples using solutions containing 140.1, 280.2, 560.4, and 840.6 mg L⁻¹ of NH₄⁺-N at pH 4, 5, 6, and 7, equilibrated for 5, 10, 15, 20, 30, 45, 60, 75, 90, and 120 min. Samples for NH₄⁺ desorption were equilibrated with 70.1, 280.2, 560.4, and 140[.]1 mg L⁻¹ NH₄⁺-N solution at pH 4, 5, 6, and 7 for 2.5 h, and adsorbed NH₄⁺ extracted with 2 M KCl for 5, 10, 20, 30, 45, 60, 90, 120, 150, 180, and 300 min. Equilibrium time for NH₄⁺ adsorption ranged from 60 min for 140.1 mg L⁻¹ initial NH₄⁺ concentration at pH 4 to 120 min for 840.6 mg L⁻¹ initial NH₄⁺ concentration at pH 7. Desorption was nearly complete in 150 min for low initial NH₄⁺ concentrations and 200 min for high initial NH₄⁺ concentrations. Amounts of NH₄⁺ sorbed increased with increasing pH and initial NH₄⁺ concentrations. Models evaluated included the first-order kinetics, modified Freundlich, parabolic diffusion, Elovich, and heterogenous diffusion. All the models adequately described the NH₄⁺ adsorption process, with r² values ranging from 0.955 to 0.999. With the exception of first-order kinetics, they also described the desorption process well, with r² values ranging from 0.897 to 0.999, for all pH and initial NH₄⁺ concentrations. Reaction rate coefficients (k) were calculated from the modified Freundlich model and ranged from 0.134 to 0.193 min⁻¹ for the adsorption process, and 0.129 to 0.226 min⁻¹ for the desorption process. The models indicated that NH₄⁺ adsorption and desorption by the zeolite was diffusion controlled. Data from this study indicated the potential use of the tested natural zeolite as an NH₄⁺ adsorbent and a controlled-release NH₄⁺ fertilizer." |
|---|
| Language: | English |
|---|
| References: | 52 |
|---|
| Note: | Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kithome, M., J. W. Paul, L. M. Lavkulich, and A. A. Bomke. 1998. Kinetics of ammonium adsorption and desorption by the natural zeolite clinoptilolite. Soil Sci. Soc. Am. J. 62(3):p. 622-629. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=53133 |
| If there are problems with this record, send us feedback about record 53133. |
| Choices for finding the above item: |
|---|
| Web URL(s):
https://acsess.onlinelibrary.wiley.com/doi/10.2136/sssaj1998.03615995006200030011x
Last checked: 03/01/2024
Access conditions: Item is within a limited-access website
Notes: Abstract only
https://acsess.onlinelibrary.wiley.com/doi/epdf/10.2136/sssaj1998.03615995006200030011x
Last checked: 03/01/2024
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: S 590 .S65 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
