Removal of copper(II) ions from aqueous solution onto chitosan and cross-linked chitosan beads |
| |
| Affiliation: | 1. Chemistry Institute, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal 59072-970, RN, Brazil;2. School of Experimental Science and Technology, ESCET, Rey Juan Carlos University, Móstoles 28933, Madrid, Spain.;1. Postgraduate in Civil and Environmental Engineering, Faculty of Engineering and Architecture, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil;2. Chemical Engineering Course, Faculty of Engineering and Architecture, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil;3. Postgraduate in Food Science and Technology, Faculty of Agronomy and Veterinary Medicine, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil;4. Chemical Engineering Department, Federal University of Santa Maria, Roraima Avenue, 1000 Santa Maria, RS, Brazil;1. Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China;2. College of Natural and Health Sciences, Zayed University, P.O. Box 144534, Abu Dhabi, United Arab Emirates;3. Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland;1. State Key Joint Laboratory of Environment Simulation and Pollution Control, Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing 100084, China;2. Green Intelligence Environmental School, Yangtze Normal University, Chongqing 408100, China |
| |
| Abstract: | The adsorption of Cu(II) ions onto chitosan and cross-linked chitosan beads has been investigated. Chitosan beads were cross-linked with glutaraldehyde (GLA), epichlorohydrin (ECH) and ethylene glycol diglycidyl ether (EGDE) in order to obtain sorbents that are insoluble in aqueous acidic and basic solution. Batch adsorption experiments were carried out as a function of pH, agitation period, agitation rate and concentration of Cu(II) ions. A pH of 6.0 was found to be a optimum for Cu(II) adsorption on chitosan and cross-linked chitosan beads. Isotherm studies indicate Cu(II) can be effectively removed by chitosan and cross-linked chitosan beads. Adsorption isothermal data could be well interpreted by the Langmuir equation. Langmuir constants have been determined for chitosan and cross-linked chitosan beads. The experimental data of the adsorption equilibrium from Cu(II) solution correlated well with the Langmuir isotherm equation. The uptakes of Cu(II) ions on chitosan beads were 80.71 mg Cu(II)/g chitosan, on chitosan-GLA beads were 59.67 mg Cu(II)/g chitosan-GLA, on chitosan-ECH beads were 62.47 mg Cu(II)/g chitosan-ECH and on chitosan-EGDE beads were 45.94 mg Cu(II)/g chitosan-EGDE. The Cu(II) ions can be removed from the chitosan and cross-linked chitosan beads rapidly by treatment with an aqueous EDTA solution and at the same time the chitosan and cross-linked chitosan beads can be regenerated and also can be used again to adsorb heavy metal ions. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
