Synthesis and characterization of a crosslinked chitosan derivative with a complexing agent and its adsorption studies toward metal(II) ions

被引:56
作者
Krishnapriya, K. R. [1 ]
Kandaswamy, M. [1 ]
机构
[1] Univ Madras, Dept Inorgan Chem, Madras 600025, Tamil Nadu, India
关键词
Chitosan; Crosslinked chitosan; Complexing agent; Metal(II) adsorption; Sorbent material; Langmuir isotherm; AQUEOUS-SOLUTION; SCHIFF-BASES; CARBOXYMETHYL-CHITOSAN; COPPER(II) ADSORPTION; WASTE-WATER; REMOVAL; CU(II); KINETICS; BEHAVIOR; RESIN;
D O I
10.1016/j.carres.2009.05.025
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
A new chitosan derivative has been synthesized by crosslinking a metal complexing agent, [6,6'-piperazine-1,4-diyldimethylenebis (4-methyl-2-formyl) phenol] (L), with chitosan (CTS). The resulting material (CCTSL) was characterized by elemental (CHN), spectral (FTIR and solid-state NMR), thermal (TGA and DTA), and structural (powder XRD and SEM) analyses. Adsorption experiments (pH dependency, kinetics, and equilibrium) of CCTSL toward various metal ions such as Mn(II), Fe(II), Co(II), Cu(II), Ni(II), Cd(II), and Pb(II) were carried out at 25 degrees C. The results showed that the adsorption was dependent on the pH of the solution, with a maximum capacity between pHs 6.5 and 8.5. The kinetics was evaluated by applying the pseudo-first-order and pseudo-second-order equation models and the equilibrium data were analyzed by Langmuir isotherm model. The maximum adsorption capacity was 1.21 mmol g(-1) for Cu(II) and the order of adsorption capacities for the metal(II) ions studied was found to be Cu(II) > Ni(II) > Cd(II) >= Co(II) >= Mn(II) >= Fe(II) >= Pb(II). (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1632 / 1638
页数:7
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