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| Characterization of nitrate ions adsorption and diffusion in P(DMAEMA/HEMA) hydrogels |
| Yun Tian |
| College of Science, Tianjin University, Tianjin 300072, China |
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Abstract In this work, the adsorption and diffusion behavior of nitrate ions into polycationic P(DMAEMA/HEMA) hydrogels is analyzed. Experimental results indicated that nitrate ions can be removed efficiently from aqueous solutions. Adsorption isotherm of gels was well according to the Langmuir and Langmuir-Freundlich models. At the same time, the diffusion behavior of nitrate ions from P(DMAEMA/HEMA) hydrogels was investigated. The diffusion coefficients are strongly influenced by the changes of temperature and pH value of solutions. At the same time, D does not depend on the gels cross-linking ratio and initial solute concentration.
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Received: 21 March 2008
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Corresponding Authors:
Yun Tian,tianyunty@sina.com
E-mail: tianyunty@sina.com
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