Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (7): 148-154.

• Materials Science & Technology • Previous Articles    

Study on the Adsorption of Copper Ions by Epichlorohydrin-Crosslinked Chitosan /Sodium Alginate Adsorbent

Yuan Yi-hua  Lei Li  He Hui  Jia De-min   

  1. School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-12-05 Revised:2012-02-13 Online:2012-07-25 Published:2012-06-01
  • Contact: 袁毅桦(1963-) ，女，教授，主要从事高分子材料的合成与改性研究． E-mail:fsxuyuan@fosu.edu.cn
  • About author:袁毅桦(1963-) ，女，教授，主要从事高分子材料的合成与改性研究．
  • Supported by:

    广东省高等学校科技创新重点资助项目( 2010cxzd1009) ; 广东省科技计划资助项目( 2006B36530002)

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Abstract:

In this paper,first,a new kind of crosslinked chitosan /sodium alginate absorbent was prepared,with chitosan and sodium alginate as the raw materials and with epichlorohydrin as the crosslinking agent. Next,the structure of the product was characterized by means of FT-IR. Then,the adsorption capacity affected by the adsorption time,the pH value,the adsorption agent dosage and the crosslinking degree was investigated. Finally,the adsorption properties of the prepared absorbent were analyzed and the corresponding adsorption kinetics was discussed. The results indicate that,when 0. 10 g of absorbent is added in 100 mL of 50 mg /L Cu2+ solution at pH 4. 0 ～ 6. 0 to perform an adsorption for 120min,the adsorption capacity reaches 46. 4mg /g,that the isothermal adsorption at low or high concentration respectively accords with the Freundlich or the Langmuir equation,and that the absorption kinetics accords with the pseudo-second-order equation with good linear correlation ( r2 = 0. 9444).

Key words: isothermal adsorption, adsorption kinetics, chitosan, sodium alginate, epichlorohydrin, copper ion

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