Abstract：
:Crosslinked chitosan beads were grafted with N-vinyl-2-pyrrolidone (NVP) using ammonium persulfate (APS) as free radical initiator. Important variables on graft copolymerization such as temperature, reaction time, concentration of initiator and concentration of monomer were optimized. The results revealed optimum conditions for maximum grafting of NVP on 1g crosslinked chitosan as follows: reaction temperature, 60°C; reaction time, 2h and concentrations of APS and NVP of 2.63×10-1M and 26.99×10-1M, respectively. The modified chitosan beads were characterized by FTIR spectroscopy, 13C NMR, SEM and BET to provide evidence of successful crosslinking and grafting reactions. The resulting material (cts(x)-g-PNVP) was evaluated as adsorbent for the removal of Cu(II) ions from aqueous solutions in a batch experiment. The Langmuir and Freundlich adsorption models were also applied to describe the equilibrium isotherms. The results showed that the adsorption of the copper ions onto the beads agreed well with Langmuir model with the maximum capacity (qmax) of 122mgg-1.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Sutirman ZA,Sanagi MM,Abd Karim J,Abu Naim A,Wan Ibrahim WAdoi
10.1016/j.ijbiomac.2017.09.061subject
Has Abstractpub_date
2018-02-01 00:00:00pages
891-897issue
Pt Aeissn
0141-8130issn
1879-0003pii
S0141-8130(17)30506-8journal_volume
107pub_type
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