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Isotherm, kinetic, and thermodynamic equations for cefalexin removal from liquids using activated carbon synthesized from loofah sponge

Kong, Qiang, Wang, Yan-na, Shu, Li and Miao, Ming-sheng 2016, Isotherm, kinetic, and thermodynamic equations for cefalexin removal from liquids using activated carbon synthesized from loofah sponge, Desalination and water treatment, vol. 57, no. 17, pp. 7933-7942, doi: 10.1080/19443994.2015.1052991.

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Title Isotherm, kinetic, and thermodynamic equations for cefalexin removal from liquids using activated carbon synthesized from loofah sponge
Author(s) Kong, Qiang
Wang, Yan-na
Shu, Li
Miao, Ming-sheng
Journal name Desalination and water treatment
Volume number 57
Issue number 17
Start page 7933
End page 7942
Total pages 10
Publisher Taylor & Francis
Place of publication London, Eng.
Publication date 2016
ISSN 1944-3994
1944-3986
Keyword(s) Activated carbon
Adsorption
Cefalexin
Loofah sponge
Summary Activated carbon (AC) developed from loofah sponge with phosphoric acid activation was applied to absorb cefalexin (CEX) in aqueous solution. AC was characterized by N2 adsorption–desorption isotherms and Fourier transform infrared spectroscopy (FTIR). Factors influencing the adsorption process were investigated. The equilibrium adsorption isotherms and kinetics of CEX were also studied. The results showed that AC prepared from loofah sponge had rough surface and abundant pores. The determination results of specific surface area (810.12 m2/g) and average pore size (5.28 nm) suggested the high adsorption capability. At low concentration, the AC could adsorb about 95% of CEX. The adsorption effect was independent of the temperature and pH. The maximum adsorption amount of CEX was about 55.11 mg/g at 308 K. The equilibrium data agreed well with Freundlich isotherm equation (R2 = 0.9957) at 308 K, which indicated multilayer adsorption. FTIR analysis suggested the existence of phosphorus-containing functional groups, C–O bond, and C=C bond on the surface of AC of which the peak intensity of AC after adsorption was slightly lower after adsorption, indicating that the AC surface groups interacted with or were covered by the CEX species.
Language eng
DOI 10.1080/19443994.2015.1052991
Field of Research 090404 Membrane and Separation Technologies
Socio Economic Objective 829803 Management of Liquid Waste from Plant Production (excl. Water)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Balaban Desalination Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30074917

Document type: Journal Article
Collection: School of Engineering
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