Kajian Adsorpsi Cd (II) pada Kitosan-Alumina
ABSTRACT: One techniques to
reduce the concentration of heavy metal Cd(II) in aqueous solution is
adsorption by chitosan. To modify the surface textures and expose the active
binding sites, composite biosorbent has been prepared by coating chitosan onto
alumina. The aims of this research were to identify the functional group of
chitosan-alumina, to characterize adsorption of Cd(II) by using chitosan-alumina
adsorbent including optimum pH, optimum agitation time, and to determine the
adsorption capacity of the adsorbent. The functional group of chitosan-alumina
was identified by infrared spectrophotometer. Determination of the optimum
condition was carried out at 40 ppm Cd(II), 125 rpm and 0,1 g adsorbent.
Calculation of adsorpted Cd(II) based on its concentration in aqueous phase
before and after adsorption process. The concentrations of Cd(II) in aqueous
phase after adsorption process were
determined by using Atomic Absorption Spectroscopy (AAS). Identified functional
groups of chitosan-alumina were -OH (3466.39 cm-1), -NH amine (1625.15 cm-1),
C=O (1703.30 cm-1), and Al-O (1302.07 cm-1). The optimum pH was reached at pH
7, optimum agitation time at 15 minutes, and adsorption capacity of
chitosan-alumina was 15.35 ± 0.05 mg/g.
Penulis: Darjito, Danar
Purwonugroho, Siti Nasirotun Nisa
Kode Jurnal: jpkimiadd060071
