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Preparation and characterization of surfactant-modified hydroxyapatite/zeolite composite and its adsorption behavior toward humic acid and copper(II).
Environ Sci Pollut Res Int. 2013 Apr; 20(4):2512-26.ES

Abstract

A novel composite material, i.e., surfactant-modified hydroxyapatite/zeolite composite, was used as an adsorbent to remove humic acid (HA) and copper(II) from aqueous solution. Hydroxyapatite/zeolite composite (HZC) and surfactant-modified HZC (SMHZC) were prepared and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and field emission scanning electron microscope. The adsorption of HA and copper(II) on SMHZC was investigated. For comparison purposes, HA adsorption onto HZC was also investigated. SMHZC exhibited much higher HA adsorption capacity than HZC. The HA adsorption capacity for SMHZC decreased slightly with increasing pH from 3 to 8 but decreased significantly with increasing pH from 8 to 12. The copper(II) adsorption capacity for SMHZC increased with increasing pH from 3 to 6.5. The adsorption kinetic data of HA and copper(II) on SMHZC obeyed a pseudo-second-order kinetic model. The adsorption of HA and copper(II) on SMHZC took place in three different stages: fast external surface adsorption, gradual adsorption controlled by both film and intra-particle diffusions, and final equilibrium stage. The equilibrium adsorption data of HA on SMHZC better fitted to the Langmuir isotherm model than the Freundlich isotherm model. The equilibrium adsorption data of copper(II) on SMHZC could be described by the Langmuir, Freundlich, and Dubinin-Radushkevich isotherm models. The presence of copper(II) in solution enhanced HA adsorption onto SMHZC. The presence of HA in solution enhanced copper(II) adsorption onto SMHZC. The mechanisms for the adsorption of HA on SMHZC at pH 7 may include electrostatic attraction, organic partitioning, hydrogen bonding, and Lewis acid-base interaction. The mechanisms for the adsorption of copper(II) on SMHZC at pH 6 may include surface complexation, ion exchange, and dissolution-precipitation. The obtained results indicate that SMHZC can be used as an effective adsorbent to simultaneously remove HA and copper(II) from water.

Authors+Show Affiliations

College of Marine Science, Shanghai Ocean University, No.999 Hucheng Huan Road, Pudong District, 201306, Shanghai, China.No affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

22961484

Citation

Zhan, Yanhui, et al. "Preparation and Characterization of Surfactant-modified Hydroxyapatite/zeolite Composite and Its Adsorption Behavior Toward Humic Acid and Copper(II)." Environmental Science and Pollution Research International, vol. 20, no. 4, 2013, pp. 2512-26.
Zhan Y, Lin J, Li J. Preparation and characterization of surfactant-modified hydroxyapatite/zeolite composite and its adsorption behavior toward humic acid and copper(II). Environ Sci Pollut Res Int. 2013;20(4):2512-26.
Zhan, Y., Lin, J., & Li, J. (2013). Preparation and characterization of surfactant-modified hydroxyapatite/zeolite composite and its adsorption behavior toward humic acid and copper(II). Environmental Science and Pollution Research International, 20(4), 2512-26. https://doi.org/10.1007/s11356-012-1136-1
Zhan Y, Lin J, Li J. Preparation and Characterization of Surfactant-modified Hydroxyapatite/zeolite Composite and Its Adsorption Behavior Toward Humic Acid and Copper(II). Environ Sci Pollut Res Int. 2013;20(4):2512-26. PubMed PMID: 22961484.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Preparation and characterization of surfactant-modified hydroxyapatite/zeolite composite and its adsorption behavior toward humic acid and copper(II). AU - Zhan,Yanhui, AU - Lin,Jianwei, AU - Li,Jia, Y1 - 2012/09/08/ PY - 2012/06/28/received PY - 2012/08/22/accepted PY - 2012/9/11/entrez PY - 2012/9/11/pubmed PY - 2013/5/15/medline SP - 2512 EP - 26 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 20 IS - 4 N2 - A novel composite material, i.e., surfactant-modified hydroxyapatite/zeolite composite, was used as an adsorbent to remove humic acid (HA) and copper(II) from aqueous solution. Hydroxyapatite/zeolite composite (HZC) and surfactant-modified HZC (SMHZC) were prepared and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and field emission scanning electron microscope. The adsorption of HA and copper(II) on SMHZC was investigated. For comparison purposes, HA adsorption onto HZC was also investigated. SMHZC exhibited much higher HA adsorption capacity than HZC. The HA adsorption capacity for SMHZC decreased slightly with increasing pH from 3 to 8 but decreased significantly with increasing pH from 8 to 12. The copper(II) adsorption capacity for SMHZC increased with increasing pH from 3 to 6.5. The adsorption kinetic data of HA and copper(II) on SMHZC obeyed a pseudo-second-order kinetic model. The adsorption of HA and copper(II) on SMHZC took place in three different stages: fast external surface adsorption, gradual adsorption controlled by both film and intra-particle diffusions, and final equilibrium stage. The equilibrium adsorption data of HA on SMHZC better fitted to the Langmuir isotherm model than the Freundlich isotherm model. The equilibrium adsorption data of copper(II) on SMHZC could be described by the Langmuir, Freundlich, and Dubinin-Radushkevich isotherm models. The presence of copper(II) in solution enhanced HA adsorption onto SMHZC. The presence of HA in solution enhanced copper(II) adsorption onto SMHZC. The mechanisms for the adsorption of HA on SMHZC at pH 7 may include electrostatic attraction, organic partitioning, hydrogen bonding, and Lewis acid-base interaction. The mechanisms for the adsorption of copper(II) on SMHZC at pH 6 may include surface complexation, ion exchange, and dissolution-precipitation. The obtained results indicate that SMHZC can be used as an effective adsorbent to simultaneously remove HA and copper(II) from water. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/22961484/Preparation_and_characterization_of_surfactant_modified_hydroxyapatite/zeolite_composite_and_its_adsorption_behavior_toward_humic_acid_and_copper_II__ L2 - https://dx.doi.org/10.1007/s11356-012-1136-1 DB - PRIME DP - Unbound Medicine ER -