Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/45610
標題: Removal of zinc(II) from aqueous solution by purified carbon nanotubes: Kinetics and equilibrium studies
作者: Lu, C.S.
盧重興
Chiu, H.
Liu, C.T.
關鍵字: activated carbon
adsorption
water
sorption
copper
nickel
waste
ions
期刊/報告no:: Industrial & Engineering Chemistry Research, Volume 45, Issue 8, Page(s) 2850-2855.
摘要: Single-walled carbon nanotubes (SWCNTs) and multiwalled carbon nanotubes (MWCNTs) were purified by sodium hypochlorite solutions and were employed as sorbents to study the kinetics and equilibrium of Zn2+ sorption from aqueous solution. The amount of Zn2+ sorbed onto CNTs increased with a rise in temperature. Using the same conditions, the Zn2+ sorption capacity of CNTs was much greater than that of commercially available powdered activated carbon, reflecting that SWCNTs and MWCNTs are effective sorbents. The thermodynamic analysis revealed that the sorption of Zn2+ onto CNTs is endothermic and spontaneous. The sorption/desorption study showed that the Zn2+ ions could be easily removed from the surface site of SWCNTs and MWCNTs by a 0.1 mol/L nitric acid solution and the sorption capacity was maintained after 10 cycles of the sorption/desorption process. This suggests that both CNTs can be reused through many cycles of water treatment and regeneration.
URI: http://hdl.handle.net/11455/45610
ISSN: 0888-5885
文章連結: http://dx.doi.org/10.1021/ie051206h
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