| Summary: | The adsorption study of Cu(II) on the ionic-imprinted-bentonite prepared via
grafting method with 3-aminopropyltrimethoxysilane (3-APTMS) has been
conducted. The research was initialized by characterizing the bentonite, including the
identification of functional group, structure and and surface analysis. The adsorption
properties were then studied, including the determination of optimum condition,
capacity, energy, kinetic and selectivity.
Synthesis of ionic-imprinted-bentonite was conducted by using grafting
method on the layer with the Cu(II). The results showed that the adsorption was
optimum at pH of 4 and followed Langmuir isotherm with the capacity of 37.75 and
13.22 mg g-1 for ionic-imprinted- and acid-activated-bentonites, respectively. The
adsorption energies were 34.20 and 31.13 kJ mol-1 for ionic-imprinted- and acidactivated-
bentonites, respectively. The adsorption kinetics followed the pseudo 2nd
order and reached the equilibrium at120 min. The adsorption rate constants were
6,24x10-3 and 40,47x10-3g mg-1min-1 for ionic-imprinted- and acid-activatedbentonites,
respectively. The study of selectivity showed that the ionic-imprintedbentonite
was more selective to Cu(II) than to Mg(II), Zn(II) and Cd(II) comparing
to the acid-activated-bentonite.
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