CHARACTERIZATION OF SORBENT PRODUCED THROUGH IMMOBILIZATIONOF HUMIC ACID ON CHITOSAN USING GLUTARALDEHYDEAS CROSS-LINKING AGENT AND Pb(lI) ION AS ACTIVE SITE PROTECTOR
| Main Author: | Perpustakaan UGM, i-lib |
|---|---|
| Format: | Article NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2010
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/28097/ http://i-lib.ugm.ac.id/jurnal/download.php?dataId=11160 |
Daftar Isi:
- ABSTRACT Sorbent produced through immobilization of humic acid (HA) on chitosan using glutaraldehyde as cross-linking agent and Pb(lI) ions as active site protector has been characterized.Active sorption site of HA was protected by reacting HA with Pb(lI) ion, and the protected-HA was then activated by glutaraldehyde, crosslinked onto chitosan, and deprotected by 0.1 M disodium ethylenediamine tetra-acetic acid (Na2EDTA). The protected-crosslinking method enhanced the content of immobilized-HAand its chemical stability. Based on the FTIR spectra, crosslinking of HA on chitosan probably occurred through a chemical reaction. The sorption capacity of sorbent still remains unchanged after the second regeneration. but some of HA start to be soluble. The latter shows that cross-linking reaction between HA and chitosan is through formation an unstable product. The effectiveness of sorbent regeneration can also be identified by the XRD pattern. Keywords: immobilization, cross-linking, humic acid, chitosan, sorption