Abstract
This article deals with the determination of the adsorption properties of metal ions and humic acid in water on crosslinked chitosan derivatives (carboxymethylchitosan) which were formed using the irradiation technique without any additives. The solubility test of these crosslinked materials were investigated in acidic, alkaline media, distilled water, and certain organic solvents. Scanning electron microscopic (SEM) images showed that the crosslinked chitosan derivatives possessed a porous morphological structure. Charged characteristic analyses demonstrated typically pH-dependent properties of the crosslinked materials. The adsorption studies were carried out by the batch method at room temperature. Adsorption of heavy metal ions (such as Cu2+, Cd2+) and humic acid onto crosslinked samples was found to be strongly pH-dependent. Adsorption kinetic studies indicated the rapid removal of metal ions, and humic acid from the aqueous solutions. Moreover, isothermal adsorption data revealed that Cu2+, Cd2+, and humic acid were removed by these crosslinked materials with high efficiency. Adsorption isothermal data were interpreted well by the Langmuir equation. These crosslinked carboxymethylated chitosan derivatives indicate favorable adsorption of metal ions and humic acid. © 2007 Shanghai Institute of Applied Physics.
| Original language | English |
|---|---|
| Pages (from-to) | 42-49 |
| Number of pages | 7 |
| Journal | Nuclear Science and Techniques/Hewuli |
| Volume | 18 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Feb 2007 |
Keywords
- Adsorption
- Carboxymethylchitosan
- Crosslinking
- Humic acid
- Irradiation
- Metal ion
- O631.3+4
- X703.1