Imobilisasi Asam Humat pada Kitosan Menggunakan Metode Reaksi Pengikatan-Silang Terproteksi dan Aplikasinya sebagai Adsorben Pb(II), Cd(II), dan Cr(III)
ABSTRACT: Immobilization of
humic acid (HA) on chitosan has been done by using a protected cross-linking
reaction method and the product was then utilized as sorbent for Pb(II),
Cd(II), and Cr(III). HA was cross-linked with chitosan by using glutaraldehyde
in order to obtain sorbent insoluble in aqueous acidic and basic solution. Protection
of the active sites of HA was carried out by interacting HA with Pb(II) before
performing the cross-lingking reaction in order to maintain its adsorption
capacity The result showed that the amount of immobilized HA on chitosan was
99.7% by weight. The solubility of the immobilized HA were < 0.5% at pH 6
and < 1.0% at pH 12. The amount of immobilized HA and its solubility
indicated that the protection pretreatment did not interfere the cross-linking
reaction between HA and chitosan. The adsorption capacity of the sorbent for
Pb(II), Cd(II), and Cr(III) were 416.7 mg/g, 332.3 mg/g, dan 714.3 mg/g,
respectively.
Penulis: Uripto Trisno
Santoso, Dewi Umaningrum, Utami Irawati, Radna Nurmasari
Kode Jurnal: jpkimiadd080113
