TY - JOUR T1 - Ammonium removal from aqueous solutions by using natural Chinese (Chende) zeolite as adsorbent. AU - Huang,Haiming, AU - Xiao,Xianming, AU - Yan,Bo, AU - Yang,Liping, Y1 - 2009/10/06/ PY - 2009/05/19/received PY - 2009/08/03/revised PY - 2009/09/30/accepted PY - 2009/10/31/entrez PY - 2009/10/31/pubmed PY - 2010/4/30/medline SP - 247 EP - 52 JF - Journal of hazardous materials JO - J Hazard Mater VL - 175 IS - 1-3 N2 - 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). SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19875231/Ammonium_removal_from_aqueous_solutions_by_using_natural_Chinese__Chende__zeolite_as_adsorbent_ DB - PRIME DP - Unbound Medicine ER -