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Preparation of highly ordered cubic NaA zeolite from halloysite mineral for adsorption of ammonium ions.
J Hazard Mater. 2010 Jun 15; 178(1-3):658-64.JH

Abstract

Well-ordered cubic NaA zeolite was first synthesized using natural halloysite mineral with nanotubular structure as source material by hydro-thermal method. SEM and HRTEM images indicate that the synthesized NaA zeolite is cubic-shaped crystal with planar surface, well-defined edges and symmetrical and uniform pore channels. The adsorption behavior of ammonium ions (NH(4)(+)) from aqueous solution onto NaA zeolite was investigated as a function of parameters such as equilibrium time, pH, initial NH(4)(+) concentration, temperature and competitive cations. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. A maximum adsorption capacity of 44.3 mg g(-1) of NH(4)(+) was achieved. The regeneration and reusable ability of this adsorbent was evaluated, and the results indicated that the recovered adsorbent could be used again for NH(4)(+) removal with nearly constant adsorption capacity. Thermodynamic parameters such as change in free energy (DeltaG(0)), enthalpy (DeltaH(0)) and entropy (DeltaS(0)) were also determined, which indicated that the adsorption was a spontaneous and exothermic process at ambient conditions. Compared with other adsorbents, the as-synthesized NaA zeolite displays a faster adsorption rate and higher adsorption capacity, which implies potential application for removing NH(4)(+) pollutants from wastewaters.

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Authors+Show Affiliations

Zhao Y
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
Zhang B
No affiliation info available
Zhang X
No affiliation info available
Wang J
No affiliation info available
Liu J
No affiliation info available
Chen R
No affiliation info available

MeSH

AdsorptionAlgorithmsAluminum SilicatesCationsClayCold TemperatureHydrogen-Ion ConcentrationKineticsMicroscopy, Electron, ScanningMicroscopy, Electron, TransmissionQuaternary Ammonium CompoundsSpectroscopy, Fourier Transform InfraredTemperatureThermodynamicsX-Ray DiffractionZeolites

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20172651

Citation

Zhao, Yafei, et al. "Preparation of Highly Ordered Cubic NaA Zeolite From Halloysite Mineral for Adsorption of Ammonium Ions." Journal of Hazardous Materials, vol. 178, no. 1-3, 2010, pp. 658-64.
Zhao Y, Zhang B, Zhang X, et al. Preparation of highly ordered cubic NaA zeolite from halloysite mineral for adsorption of ammonium ions. J Hazard Mater. 2010;178(1-3):658-64.
Zhao, Y., Zhang, B., Zhang, X., Wang, J., Liu, J., & Chen, R. (2010). Preparation of highly ordered cubic NaA zeolite from halloysite mineral for adsorption of ammonium ions. Journal of Hazardous Materials, 178(1-3), 658-64. https://doi.org/10.1016/j.jhazmat.2010.01.136
Zhao Y, et al. Preparation of Highly Ordered Cubic NaA Zeolite From Halloysite Mineral for Adsorption of Ammonium Ions. J Hazard Mater. 2010 Jun 15;178(1-3):658-64. PubMed PMID: 20172651.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Preparation of highly ordered cubic NaA zeolite from halloysite mineral for adsorption of ammonium ions. AU - Zhao,Yafei, AU - Zhang,Bing, AU - Zhang,Xiang, AU - Wang,Jinhua, AU - Liu,Jindun, AU - Chen,Rongfeng, Y1 - 2010/02/02/ PY - 2009/10/09/received PY - 2010/01/27/revised PY - 2010/01/27/accepted PY - 2010/2/23/entrez PY - 2010/2/23/pubmed PY - 2010/7/14/medline SP - 658 EP - 64 JF - Journal of hazardous materials JO - J Hazard Mater VL - 178 IS - 1-3 N2 - Well-ordered cubic NaA zeolite was first synthesized using natural halloysite mineral with nanotubular structure as source material by hydro-thermal method. SEM and HRTEM images indicate that the synthesized NaA zeolite is cubic-shaped crystal with planar surface, well-defined edges and symmetrical and uniform pore channels. The adsorption behavior of ammonium ions (NH(4)(+)) from aqueous solution onto NaA zeolite was investigated as a function of parameters such as equilibrium time, pH, initial NH(4)(+) concentration, temperature and competitive cations. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. A maximum adsorption capacity of 44.3 mg g(-1) of NH(4)(+) was achieved. The regeneration and reusable ability of this adsorbent was evaluated, and the results indicated that the recovered adsorbent could be used again for NH(4)(+) removal with nearly constant adsorption capacity. Thermodynamic parameters such as change in free energy (DeltaG(0)), enthalpy (DeltaH(0)) and entropy (DeltaS(0)) were also determined, which indicated that the adsorption was a spontaneous and exothermic process at ambient conditions. Compared with other adsorbents, the as-synthesized NaA zeolite displays a faster adsorption rate and higher adsorption capacity, which implies potential application for removing NH(4)(+) pollutants from wastewaters. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/20172651/Preparation_of_highly_ordered_cubic_NaA_zeolite_from_halloysite_mineral_for_adsorption_of_ammonium_ions_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(10)00172-X DB - PRIME DP - Unbound Medicine ER -