期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 22, 期 4, 页码 486-493出版社
SCIENCE PRESS
DOI: 10.1016/S1001-0742(09)60134-0
关键词
hydrogel composites; vermiculite; Methylene Blue; adsorption kinetics; adsorption isotherms
资金
- National Natural Science Foundation of China [20877077]
- Jiangsu Provincial Science and Technology Office [BE2008087]
A series of chitosan-g-poly (acrylic acid)/vermiculite hydrogel composites were synthesized and used as adsorbents for the investigation of the effect of process parameters such as vermiculite content, pH of dye solution, contact time, initial concentration of dye solution, temperature, ionic strength and concentration of surfactant sodium dodecyl sulfate on the removal of Methylene Blue (MB) from aqueous solution. The results showed that the adsorption capacity for dye increased with increasing pH, contact time and initial dye concentration, but decreased with increasing temperature, ionic strength and sodium dodecyl sulfate concentration in the present of the surfactant. The adsorption kinetics of MB onto the hydrogel composite followed pseudo second-order kinetics and the adsorption equilibrium data obeyed Langmuir isotherm. By introducing 10 wt.% vermiculite into chitosan-g-poly (acrylic acid) polymeric network, the obtaining hydrogel composite showed the highest adsorption capacity for MB, and then could be regarded as a potential adsorbent for cationic dye removal in a wastewater treatment process.
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