Adsorption of divalent heavy metal ion by mesoporous-high surface area chitosan/poly (ethylene oxide) nanofibrous membrane.

Autor: Shariful MI; Centre of Advanced Materials, Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia. Electronic address: sharifulislam.mamun@gmail.com., Sharif SB; Centre of Advanced Materials, Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia. Electronic address: sbsjoh@yahoo.com., Lee JJL; Centre of Advanced Materials, Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia. Electronic address: jacky_ljl@hotmail.com., Habiba U; Centre of Advanced Materials, Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia. Electronic address: habiba_buet@yahoo.com., Ang BC; Centre of Advanced Materials, Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia. Electronic address: amelynang@um.edu.my., Amalina MA; Centre of Advanced Materials, Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia. Electronic address: amalina@um.edu.my.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2017 Feb 10; Vol. 157, pp. 57-64. Date of Electronic Publication: 2016 Sep 21.
DOI: 10.1016/j.carbpol.2016.09.063
Abstrakt: In this study, chitosan/poly (ethylene oxide) nanofibres were fabricated at different chitosan:PEO weight ratio by electrospinning process. The effects of chitosan/PEO composition onto adsorption capability for Cu(II), Zn(II) and Pb(II) ions were studied. Formation of beadless fibres were achieved at 60:40 chitosan:PEO ratio. Average fiber diameter, maximum tensile strength and the specific surface area of the beadless fibres were found to be 115±31nm, 1.58MPa and 218m 2 /g, respectively. Chitosan/PEO composition that produced beadless fibres tend to possess higher hydrophilicity and maximum specific surface area. These characteristics lead the beadless fibres to the maximum adsorption capability. Adsorption equilibrium data were analysed by Langmuir and Freundlich isotherm. Freundlich isotherm showed the better fit with the experimental data and proved the existence of the monolayer adsorption conditions. The maximum adsorption capacity of the beadless fibres for Cu(II), Zn(II) and Pb(II) ions were found to be 120, 117 and 108mgg -1 , respectively.
(Copyright © 2016. Published by Elsevier Ltd.)
Databáze: MEDLINE
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