| Summary: | The adsorption properties of copper ion imprinted chitosan have been
studied through formation of chitosan-copper complex then followed by
crosslinking with glutaraldehyde and release of metal ion precursor with
Na2EDTA. Characterizations of KTI(Cu) were done by identification of
functional group and gas sorption analyzer to determine its specific surface area.
Adsorbent stabilities has been studied in acid medium with variations of pH. The
adsorption of Cu(II) was conducted by using batch adsorption method as a
function pH, and variety of Cu(II) ion concentrations. Adsorption selectivities of
the adsorbents have studied in metal mixtures (Cu2+, Ca2+, and Zn2+). The analysis
of Cu(II), Ca(II), and Zn(II) ions before and after adsorption were done by using
atomic absorption spectrometry (AAS) method.
The results showed that the characterization of the modification of
chitosan into IIC(Cu) using FTIR gave information that the IIC(Cu) contained
amine groups (NH2) and imine groups (C=N). Gas sorption analyzer confirmed
that the IIC(Cu) has a smaller specific surface area, in the ranging from 1.38 m2/g
to 1.56 m2 / g than cross-linked chitosan, CC which was in the range from 1.51
m2/g to 1.65 m2 / g. Adsorbent stabilities towards acid indicated that CC and
IIC(Cu) were more stable (96.6 to 97%) than commercial chitosan (3%).
Optimum condition for Cu(II) adsorption for each adsorbent occurred at pH 5.
The adsorption capacities of Cu(II) ion based on Langmuir adsorption isoterm
model showed that the largest adsorption capacity of Cu(II) with the amount of
44.22 mg/g was achieved by IIC(Cu) C (10000 mg/L Cu2+ and 1%
glutaraldehyde) and CC (C) (1% glutaraldehyde) with the amount of 26.48 mg/g.
The selective multimetal adsorption showed that IIC(Cu) has a high selectivity
toward metal ion Cu(II) while CC has a low selectivity metal ion Cu(II) at
different concentration of Cu(II)
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