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Progress in Chemistry 2009, Vol. 21 Issue (10): 2250-2256 Previous Articles   

• Review •

The Radiation-Induced Synthesis of Hydrogels and Their Application for Removal of Heavy Metal Ions from Aqueous Solution

Chen Yuwei; Wang Jianlong**   

  1. (Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China)
  • Received: Revised: Online: Published:
  • Contact: Wang Jianlong E-mail:wangjl@tsinghua.edu.cn
  • Supported by:

    National Natural Science Foundation of China

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Hydrogels are cross-linked functional polymers with three-dimensional networks. Preparation of hydrogels by radiation-induced polymerization has received increasing attention in recent years due to easy process control, no necessity to add any initiators, crosslinkers, etc. Traditional processes for the treatment of heavy metal-containing wastewater encounter some disadvantages such as higher operational cost or low removal efficiency. It is a new promising method for the removal of heavy metals from aqueous solution using hydrogels. In this paper, recent advances in research on the radiation-induced synthesis of hydrogels and their application in the removal of heavy metals are reviewed including the preparation and modification of hydrogels and the performances of the adsorption of heavey metas. The perspects of this technology and the future directions are also proposed.

Contents
1 Introduction
2 Radiation-induced synthesis of hydrogels
2.1 Radiation-induced polymerization of solid polymers
2.2 Radiation-induced polymerization of aqueous solutions of polymers
2.3 Radiation treatment of monomers
2.4 Preparation of copolymer hydrogels by radiation treatment
3 Radiation-induced synthesis of hydrogels for the removal of heavy metal ions
3.1 Hydrogels based on synthetic polymers for the adsorption of heavy metals
3.2 Hydrogels based on natural polymers for the adsorption of heavy metals
3.3 Hydrogels loaded metal ions for the adsorption of heavy metals
3.4 Hydrogels loaded microorganisms for the adsorption of heavy metals
3.5 Desorption and recovery of heavy metals
4 Conclusion

Key words: hydrogels, cross-linked polymers, radiation-induced polymerization, heavy metal-containing wastewater, absorption

CLC Number: 

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