Ammonium removal from aqueous solutions by using natural Chinese (Chende) zeolite as adsorbent

This paper presents a study of the removal of ammonium ion from aqueous solutions using natural Chinese (Chende) zeolite. A series of experiments was conducted to examine the effects of solution pH, particle size, contact time, adsorbent dosage, and the presence of other cation- and anion species on...

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Bibliographic Details
Published in:Journal of hazardous materials 2010-03, Vol.175 (1), p.247-252
Main Authors: Huang, Haiming, Xiao, Xianming, Yan, Bo, Yang, Liping
Format: Article
Language:English
Subjects:
Adsorption
Adsorption kinetic
Ammonium adsorption
Ammonium removal
Anions
Applied sciences
Cations
Chemical engineering
Equilibrium isotherm
Exact sciences and technology
Hydrogen-Ion Concentration
Ions
Kinetics
Particle Size
Pollution
Quaternary Ammonium Compounds - chemistry
Quaternary Ammonium Compounds - isolation & purification
Solutions
Time Factors
Waste Disposal, Fluid - methods
Water - metabolism
Water Pollutants, Chemical - isolation & purification
Water Purification - methods
Zeolite
Zeolites - chemistry
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Summary:This paper presents a study of the removal of ammonium ion from aqueous solutions using natural Chinese (Chende) zeolite. A series of experiments was conducted to examine the effects of solution pH, particle size, contact time, adsorbent dosage, and the presence of other cation- and anion species on ammonium removal. The findings indicated that these parameters named had a significant effect on the removal of ammonium by the zeolite. The effect of other cations on the removal of ammonium followed the order of preference Na + > K + > Ca 2+ > Mg 2+ at identical mass concentrations, and the effect of the presence of individual anions followed the order of preference carbonate > chloride > sulfate > phosphate at identical mass concentrations of ammonium ions. Kinetic analysis showed that the adsorption of ammonium on zeolite at different ranges of particle size well followed the pseudo-second-order model and followed the intra-particle diffusion model only during the initial 60 min of the adsorption process. Equilibrium isotherm data was fitted to the linear Langmuir- and Freundlich models with the latter model providing the better description of the process ( R 2 = 0.991–0.997) compared to the former ( R 2 = 0.902–0.989).
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2009.09.156