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Dwi Siswanta
Department of Chemistry, Faculty of Mathematics and Natural Sciences,Universitas Gadjah Mada, Jl. Sekip Utara, Pos Box: BLS 21, Yogyakarta 55281
Chemical Engineering, Chemistry & Bioengineering Chemistry

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CHARACTERIZATION OF SORBENT PRODUCED THROUGH IMMOBILIZATION OF HUMIC ACID ON CHITOSAN USING GLUTARALDEHYDE AS CROSS-LINKING AGENT AND Pb(II) ION AS ACTIVE SITE PROTECTOR Uripto Trisno Santoso; Sri Juari Santosa; Dwi Siswanta; Bambang Rusdiarso; Shogo Shimazu
Indonesian Journal of Chemistry Vol 10, No 3 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (181.878 KB) | DOI: 10.22146/ijc.21434

Abstract

Sorbent produced through immobilization of humic acid (HA) on chitosan using glutaraldehyde as cross-linking agent and Pb(II) ions as active site protector has been characterized. Active sorption site of HA was protected by reacting HA with Pb(II) 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-HA and 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.
Co-Authors Bambang Rusdiarso Shogo Shimazu Sri Juari Santosa Uripto Trisno Santoso