Journal
CENTRAL EUROPEAN JOURNAL OF CHEMISTRY
Volume 10, Issue 4, Pages 1349-1359Publisher
SCIENDO
DOI: 10.2478/s11532-012-0055-9
Keywords
Hydrogel; Adsorption; Heavy-metal ions; Glow-discharge electrolysis plasma (GDEP); Poly(ethylene glycol) (PEG)
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Funding
- Education Ministry [00250]
- Natural Science Foundation of Gansu Province [3ZS041-A25-028, 096RJZA120]
- Gansu Key Lab of Polymer Materials, China
- Gansu Key Lab of Bioelectrochemistry and Environmental Analysis
- [NWNU-LKQN-10-16]
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An acrylic acid/poly(ethylene glycol) (AAc/PEG) hydrogel was synthesized in aqueous solution by a simple one-step method using glow-discharge electrolysis plasma (GDEP) technique. The structure of AAc/PEG hydrogel was characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). Factors influencing the adsorption of heavy-metal ions such as solution pH, contact time, initial heavy-metal ion concentration were examined systematically by batch experiments. Results showed that both chemical complexation and ion exchange played an important role for heavy-metal ion adsorption onto AAc/PEG hydrogel. The adsorption isothermals followed the Langmuir isotherm and the adsorption kinetics fitted the pseudo-second-order model at 25A degrees C with a pH 6. In addition, AAc/PEG hydrogel can be also regenerated and re-used.
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