Copper Absorption by Glass Derived Hydroxyapatite Scaffolds Prepared by Dipping with Polymer Foam

Gu, Dong Lin; Ou, Hai Peng; Wang, Jiao Jiao; Rüssel, Christian; Liang, Wen

doi:10.4028/www.scientific.net/AMM.275-277.2333

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Copper Absorption by Glass Derived Hydroxyapatite Scaffolds Prepared by Dipping with Polymer Foam
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials ICopper Absorption by Glass Derived Hydroxyapatite...

Copper Absorption by Glass Derived Hydroxyapatite Scaffolds Prepared by Dipping with Polymer Foam

Abstract:

Sodium calcium borate glass derived hydroxyapatite (G-HAP) scaffolds were prepared by dipping with polymer foam. The effects of glasses and ethyl-cellulose (EC) content on the porosity and compressive strength of the scaffolds were studied. The effects of different initial pH value and ions concentration on adsorption performance of copper ions in aqueous solutions were also investigated. The results showed that G-HAP scaffolds could immobilize copper ions in solution effectively. The mechanism of G-HAP scaffolds in immobilizing Cu2+ ions from aqueous solutions was investigated by the X-ray diffraction, Infrared Spectra and Scanning electron microscopy-Energy Dispersive Spectrometer.

Info:

Periodical:

Applied Mechanics and Materials (Volumes 275-277)

Main Theme:

Applied Mechanics and Materials I

Edited by:

Guangfan Li and Chaohe Chen

Pages:

2333-2337

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.275-277.2333

Citation:

D. L. Gu et al., "Copper Absorption by Glass Derived Hydroxyapatite Scaffolds Prepared by Dipping with Polymer Foam", Applied Mechanics and Materials, Vols. 275-277, pp. 2333-2337, 2013

Online since:

January 2013

Authors:

Dong Lin Gu, Hai Peng Ou, Jiao Jiao Wang, Christian Rüssel, Wen Liang

Keywords:

Adsorption, Cu²⁺, Glass Derived Hydroxyapatite (G-HAP) Scaffolds

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Paper TitlePages

Adsorption of Ag⁺ from Aqueous Solutions by Rice Husk

Authors: Xiao Qing Luo, Xiao Yan Lin, Xue Gang Luo, An Kai Luo, Xuan Liang

Abstract: This paper reports the feasibility of using rice husk to remove Ag+ from synthetic wastewater. Effect of various adsorption parameters, namely, pH, adsorbent dose, initial silver concentration and contact time has been studied in batch systems. The results indicated that rice husk offered high removal efficiency, fast adsorption rate and high uptake capacity for Ag+ ions. The equilibrium was attained within 20 min and the maximum removal efficiency at 11g/L rice husk and at pH 2 was found to be 99.76%. The kinetic data was fitted well to pseudo-second order model. The isotherm adsorption data was well described by the Langmuir isotherm model and the maximum uptake capacity of Ag+ ions onto rice husk was found to be 42.43 mg/g.

Hydroxyapatite Nanoparticles: Synthesis by Sonochemical Method and Assessment of Processing Parameters via Experimental Design

Authors: Lívia Fernandes Cóta, Karla Patricia Macedo Licona, Juliana do Nascimento Lunz, Alexandre Antunes Ribeiro, Lizette Morejón Alonso, Marize Varella de Oliveira, Luiz Carlos Pereira

Abstract: Hydroxyapatite (HAp) has been synthesized by different techniques, and sonochemical methods have shown to be useful in the HAp nanopartcicles production for biomedical applications such as bone graft substitute. In addition, experimental design is an appropriate tool for planning and evaluating a study to meet specified objectives. Then, this work aimed to synthesize HAp nanosized powders by a sonochemical method and assess the processing parameters via experimental design, in order to obtain dense samples. HAp nanopowders were characterized by X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscope/Field Emission Gun (SEM/FEG). For densification analysis, HAp samples were processed with different parameters, such as: compaction pressure (200 or 400 MPa), sintering temperature (900 or 1100°C), sintering heating rate (2 or 20 °C/min), and sintering time (2 or 4 hours). The samples were analyzed by SEM/FEG, whereas the linear shrinkage and density were considered the response variables for the experimental design. The results indicated that the sonochemical method successfully produced HAp nanoparticles with sphere-like morphology. Further, the experimental design showed that sintering temperature was the variable that most influenced the densification of samples.

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