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Title: Highly enhanced adsorption of lead ions on chitosan granules functionalized with poly(acrylic acid)
Authors: Li, N. 
Bai, R. 
Issue Date: 8-Nov-2006
Citation: Li, N., Bai, R. (2006-11-08). Highly enhanced adsorption of lead ions on chitosan granules functionalized with poly(acrylic acid). Industrial and Engineering Chemistry Research 45 (23) : 7897-7904. ScholarBank@NUS Repository.
Abstract: Cross-linked chitosan granules (denoted as CTS) were surface-functionalized with poly(acrylic acid) (PAAc) and examined for the adsorption of lead ions from aqueous solutions. PAAc was successfully grafted on CTS through a simple two-step reaction in a solution. The PAAc-functionalized chitosan granules (denoted as CTS-PAAc) snowed significantly greater adsorption capacities for lead ions than CTS, and the performance improved with the increase of pH in the pH range of 1-6 examined. An adsorption isotherm and kinetic study conducted at pH 4 and room temperature showed a maximum adsorption capacity of 294.12 mg/g and an adsorption equilibrium time of less than 5 h for lead ions on CTS-PAAC, in contrast to only 95.15 mg/g and up to 8 h on CTS. Mechanism study revealed that the excellent adsorption performance of CTS-PAAc for lead ions was attributed to the many carboxyl groups grafted on CTS-PAAc. It was found that adsorbed lead ions on CTS-PAAc can be effectively desorbed and the regenerated CTS-PAAc can be reused almost without any loss of adsorption capacity. © 2006 American Chemical Society.
Source Title: Industrial and Engineering Chemistry Research
ISSN: 08885885
DOI: 10.1021/ie060514s
Appears in Collections:Staff Publications

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