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过程工程学报 ›› 2015, Vol. 15 ›› Issue (6): 1057-1062.DOI: 10.12034/j.issn.1009-606X.215296

• 生化工程专栏 • 上一篇    下一篇

表面修饰聚乙烯亚胺的壳聚糖微球对十二烷基苯磺酸钠的吸附特性

荆迎军 高慧1 杨春燕   

  1. 河北工业大学化工学院 河北工业大学化工学院 河北工业大学化工学院
  • 收稿日期:2015-08-12 修回日期:2015-09-28 出版日期:2015-12-20 发布日期:2015-12-20
  • 通讯作者: 荆迎军

Adsorption Properties of Sodium Dodecylbenzenesulfonate onto Surface-modified Chitosan Microspheres with Poly(ethylenimine)

JING Ying-jun GAO Hui YANG Chun-yan   

  1. School of Chemical Engineering and Technology, Hebei University of Technology School of Chemical Engineering and Technology, Hebei University of Technology School of Chemical Engineering and Technology, Hebei University of Technology
  • Received:2015-08-12 Revised:2015-09-28 Online:2015-12-20 Published:2015-12-20
  • Contact: JING Ying-jun

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被引次数

3

摘要： 采用乳化交联法制备交联壳聚糖微球(CCS)，在其表面接枝聚乙烯亚胺(PEI)，得到系列具有不同离子交换容量(IEC)的PEI修饰交联壳聚糖微球(PEI-CCS)，对其进行表征，考察了其对十二烷基苯磺酸钠(SDBS)的静态吸附特性. 结果表明，PEI-CCS平均粒径为85 mm，IEC最高达1275 mmol/g，远高于CCS的418 mmol/g. 酸性条件下，PEI-CCS的胺基质子化，带正电荷，能与溶液中的阴离子吸附结合，对SDBS有良好的吸附能力. 吸附过程自发放热，可用准二级动力学模型和Langmuir吸附等温模型描述. PEI-CCS对SDBS的最大吸附量随IEC增加而增大，IEC=1275 mmol/g的PEI-CCS的最大吸附量为1487.61 mg/g，是CCS最大吸附量(510.20 mg/g)的2.92倍，吸附-脱附7次循环后，吸附量下降17.8%. PEI-CCS具有良好的重复使用性.

关键词: 壳聚糖微球, 聚乙烯亚胺, 十二烷基苯磺酸钠, 吸附, 脱附

Abstract: Crosslinked chitosan microspheres (CCS) were prepared by emulsion crosslinking, their surface was then grafted with poly(ethylenimine) (PEI) to synthesize a series of PEI modified crosslinked chitosan microspheres (PEI-CCS) with different ion exchange capacities (IEC). The prepared PEI-CCS were characterized, and their static adsorption properties of PEI-CCS to sodium dodecylbenzenesulfonate (SDBS) studied. The results showed that the mean diameter of PEI-CCS was 85 mm. The highest IEC of PEI-CCS reached 1275 mmol/g, being much higher than that of CCS (418 mmol/g). At acidic pH values, the amine groups of PEI-CCS carried positive charges by protonation, and could adsorb anions in aqueous solution. Thus, PEI-CCS exhibited excellent adsorption performance toward SDBS. The adsorption process was spontaneous and exothermic, and well described by the pseudo-second-order kinetic and Langmuir isotherm models. The maximum adsorption capacity of PEI-CCS increased with increasing of IEC. The maximum adsorption capacity of PEI-CCS-1275 with the highest IEC reached 1487.61 mg/g and was 2.92-fold of CCS (510.20 mg/g). The adsorption capacity of PEI-CCS-1275 was reduced by 17.8% after seven cycles of adsorption-desorption, indicating that PEI-CCS had good reusability for the adsorption of SDBS.

Key words: chitosan microsphere, poly(ethylenimine), sodium dodecylbenzenesulfonate, adsorption, desorption

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