Characteristics of ammonium adsorption by the natural clinoptilotite
The kinetics of NH<sub>4</sub><sup>+</sup> adsorption and desorption by a natural zeolite clinoptilotite were investigated. Kinetic models evaluated at different equilibrium NH4<sup>+</sup> concentrations included the first-order kinetics, modified Freundlich, par...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2001-01-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/1008-9209.2001.01.0028 |
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| Summary: | The kinetics of NH<sub>4</sub><sup>+</sup> adsorption and desorption by a natural zeolite clinoptilotite were investigated. Kinetic models evaluated at different equilibrium NH4<sup>+</sup> concentrations included the first-order kinetics, modified Freundlich, parabolic diffusion, and heterogeneous diffusion. They described the NH<sub>4</sub><sup>+</sup> adsorption process well, with r<sup>2</sup> values ranging from 0.843 to 0.997. The desorption of the adsorbed NH<sub>4</sub><sup>+</sup> was far more rapid than the adsorption. The influence of pH on adsorption depends on the buffer solution used and its concentration. |
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| ISSN: | 1008-9209 2097-5155 |