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材料导报  2020, Vol. 34 Issue (Z1): 535-538    
  高分子与聚合物基复合材料 |
壳聚糖/明胶复合微球的制备及对铬离子的吸附性能
李鸣明, 詹世平, 宫蕾
大连大学环境与化工学院,大连 116622
Preparation of Chitosan/Gelatin Composite Microspheres and Their AdsorptionProperties for Chrome(Ⅵ)
LI Mingming, ZHAN Shiping, GONG Lei
School of Environmental and Chemical Engineering, Dalian University, Dalian 116622, China
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摘要 壳聚糖具有较高的吸附性能,明胶高分子链上有氨基、羟基、羧基等活性基团,对六价铬Cr(Ⅵ)具有一定的吸附螯合作用。本工作采用乳化交联法制备壳聚糖/明胶复合微球,以微球对Cr(Ⅵ)的去除率为指标,通过正交实验优化微球制备条件,并利用扫描电镜对微粒形貌进行表征。在研究复合微球对水体中Cr(Ⅵ)的吸附性能时,考察了吸附剂用量、pH值、吸附时间、温度等因素对吸附容量的影响。结果表明,壳聚糖/明胶微球的最佳制备条件为壳聚糖/明胶质量比1∶2,乳化时间40 min,乳化剂span80用量6 mL,水油比1∶7(体积比),乳化温度60 ℃;最佳吸附条件为:吸附剂用量2 g/L,pH值4,温度35 ℃,吸附时间120 min,在该条件下微球对Cr(Ⅵ)的去除率为95.5%。
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李鸣明
詹世平
宫蕾
关键词:  废水处理  壳聚糖  明胶  铬离子  吸附    
Abstract: Chitosan has high adsorption performance for chrome(Ⅵ), as well as gelatin due to active groups on the polymer chain, such as amino, hydroxyl, carboxyl groups. In this paper, chitosan/gelatin composite microspheres were prepared using emulsion cross-linking method. The preparation conditions were optimized by orthogonal design with the removal rate of Cr(Ⅵ) as an index. The microscopic morphology was studied by SEM. The composite microspheres were used as absorbent for Cr(Ⅵ) in aqueous solution, and the effect of experimental parameters such as absorbent dosage, pH, time and temperature on the adsorption capacity were investigated. The optimal preparation conditions were: mass ratio of chitosan/gelatin 1∶2, emulsifying time 40 min, emulsifier span80 dosage 6 mL, water/oil ratio 1∶7 (volume fraction), emulsifying temperature 60 ℃. The optimal conditions for the removal of Cr(Ⅵ) were as follows: the dosage of adsorbent 2 g/L, pH=4, temperature 35 ℃ and adsorption time 120 min. Under this adsorption condition, the removal rate of Cr(Ⅵ) solution was about 95.5%.
Key words:  wastewater treatment    chitosan    gelatin    chrome(Ⅵ)    adsorption
                    发布日期:  2020-07-01
ZTFLH:  TQ319  
基金资助: 辽宁省自然科学基金指导计划(20170540036)
作者简介:  李鸣明,大连大学,讲师。2011年毕业于浙江大学,获化学工程与技术专业博士学位。2012年加入大连大学环境与化工学院工作至今,主要从事功能高分子材料的研发,重点研究药物缓释体系的制备、表征以及应用。
引用本文:    
李鸣明, 詹世平, 宫蕾. 壳聚糖/明胶复合微球的制备及对铬离子的吸附性能[J]. 材料导报, 2020, 34(Z1): 535-538.
LI Mingming, ZHAN Shiping, GONG Lei. Preparation of Chitosan/Gelatin Composite Microspheres and Their AdsorptionProperties for Chrome(Ⅵ). Materials Reports, 2020, 34(Z1): 535-538.
链接本文:  
http://www.mater-rep.com/CN/  或          http://www.mater-rep.com/CN/Y2020/V34/IZ1/535
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