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Ammonium removal from aqueous solution by zeolite X synthesized from halloysite mineral.
Water Sci Technol. 2010; 62(4):937-46.WS

Abstract

Zeolite X was successfully synthesized from natural halloysite mineral by hydrothermal method. The synthesized zeolite X was characterized by XRD, SEM, TEM and HRTEM. The characterization indicated that zeolite X had high crystallinity together with symmetrical and uniform pore channels. Ammonium (NH₄+) adsorption properties of zeolite X were studied using batch experiments. The results revealed that high initial concentration and low temperature favored NH₄+ adsorption on zeolite X. Both Langmuir and Freundlich isotherms fit well with the equilibrium data. Kinetic studies showed that the adsorption followed pseudo-second-order model. Intra-particle diffusion analysis demonstrated that NH₄+ diffused quickly among the particles at the initial 20 min of the adsorption process, and then the diffusion slowed down and stabilized. Thermodynamic parameters such as change in free energy (ΔG⁰), enthalpy (ΔH⁰) and entropy (ΔS⁰) indicated that the adsorption was spontaneous and exothermic at ambient conditions. The reusable ability of zeolite X was also evaluated. Due to its low cost, high adsorption capacity and fast adsorption rate, zeolite X synthesized from halloysite could be used as an effective and environmental-friendly adsorbent for NH₄+ removal.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Zhao Y
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China. zhaoyafei007@126.com
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

Aluminum SilicatesClayKineticsMicroscopy, ElectronMicroscopy, Electron, ScanningNickelQuaternary Ammonium CompoundsSolutionsThermodynamicsWaterX-Ray DiffractionZeolites

Pub Type(s)

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

Language

eng

PubMed ID

20729599

Citation

Zhao, Yafei, et al. "Ammonium Removal From Aqueous Solution By Zeolite X Synthesized From Halloysite Mineral." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 62, no. 4, 2010, pp. 937-46.
Zhao Y, Zhang B, Zhang X, et al. Ammonium removal from aqueous solution by zeolite X synthesized from halloysite mineral. Water Sci Technol. 2010;62(4):937-46.
Zhao, Y., Zhang, B., Zhang, X., Wang, J., Liu, J., & Chen, R. (2010). Ammonium removal from aqueous solution by zeolite X synthesized from halloysite mineral. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 62(4), 937-46. https://doi.org/10.2166/wst.2010.301
Zhao Y, et al. Ammonium Removal From Aqueous Solution By Zeolite X Synthesized From Halloysite Mineral. Water Sci Technol. 2010;62(4):937-46. PubMed PMID: 20729599.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ammonium removal from aqueous solution by zeolite X synthesized from halloysite mineral. AU - Zhao,Yafei, AU - Zhang,Bing, AU - Zhang,Xiang, AU - Wang,Jinhua, AU - Liu,Jindun, AU - Chen,Rongfeng, PY - 2010/8/24/entrez PY - 2010/8/24/pubmed PY - 2010/11/17/medline SP - 937 EP - 46 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 62 IS - 4 N2 - Zeolite X was successfully synthesized from natural halloysite mineral by hydrothermal method. The synthesized zeolite X was characterized by XRD, SEM, TEM and HRTEM. The characterization indicated that zeolite X had high crystallinity together with symmetrical and uniform pore channels. Ammonium (NH₄+) adsorption properties of zeolite X were studied using batch experiments. The results revealed that high initial concentration and low temperature favored NH₄+ adsorption on zeolite X. Both Langmuir and Freundlich isotherms fit well with the equilibrium data. Kinetic studies showed that the adsorption followed pseudo-second-order model. Intra-particle diffusion analysis demonstrated that NH₄+ diffused quickly among the particles at the initial 20 min of the adsorption process, and then the diffusion slowed down and stabilized. Thermodynamic parameters such as change in free energy (ΔG⁰), enthalpy (ΔH⁰) and entropy (ΔS⁰) indicated that the adsorption was spontaneous and exothermic at ambient conditions. The reusable ability of zeolite X was also evaluated. Due to its low cost, high adsorption capacity and fast adsorption rate, zeolite X synthesized from halloysite could be used as an effective and environmental-friendly adsorbent for NH₄+ removal. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/20729599/Ammonium_removal_from_aqueous_solution_by_zeolite_X_synthesized_from_halloysite_mineral_ DB - PRIME DP - Unbound Medicine ER -