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林产化学与工业 ›› 2014, Vol. 34 ›› Issue (1): 8-12.doi: 10.3969/j.issn.0253-2417.2014.01.002

• 研究报告 • 上一篇    下一篇

壳聚糖复合水凝胶对水溶液中铜离子(Ⅱ)的高效吸附

郭逗逗1,2, 庞浩1, 刘海露1, 徐莉莉1, 郑景新1, 廖兵1   

  1. 1. 中国科学院 广州化学研究所; 中国科学院纤维素化学重点实验室, 广东 广州 510650;
    2. 中国科学院大学, 北京 100049
  • 收稿日期:2013-01-04 出版日期:2014-02-25 发布日期:2014-03-05
  • 通讯作者: 廖兵,研究员,博士生导师,主要从事具有特殊结构的高聚物水基微乳液的研究及高性能高聚物纳米复合材料研究;E-mail:liaobing@gic.ac.cn。 E-mail:liaobing@gic.ac.cn
  • 作者简介:郭逗逗(1987-),男,安徽界首人,硕士,研究方向:生物质在水处理中的应用研究;E-mail:xfyyzy521@163.com

Preparation of Chitosan Composite Hydrogels and Its Effective Adsorption of Copper (Ⅱ) Ions from Aqueous Solutions

GUO Dou-dou1,2, PANG Hao1, LIU Hai-lu1, XU Li-li1, ZHENG Jing-xin1, LIAO Bing1   

  1. 1. Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China;
    2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2013-01-04 Online:2014-02-25 Published:2014-03-05

摘要: 以甲基丙烯酸(MAA)、丙烯酰胺(AM)和烯丙基磺酸钠(SAS)同时对壳聚糖进行接枝改性,合成了一系列对水溶液中的二价铜离子具有高效吸附性能的壳聚糖水凝胶。研究了吸附剂粒径、投料量、溶液pH值对吸附容量的影响,同时进行了对金属铜离子的吸附性能研究。结果显示,粒径0.074~0.2 mm的吸附剂,在25 mL铜离子(Ⅱ)质量浓度4 000 mg/L,pH值6的硝酸铜溶液中,投入量为0.1 g时,壳聚糖复合水凝胶最大吸附量为823 mg/g,同时吸附容量随溶液pH值增加而增加,随投料量的增大而减小。吸附等温线研究表明,Freundlich吸附模型能更好地描述吸附剂对铜离子(Ⅱ)的吸附行为,说明其吸附过程是不均匀的多分子层吸附过程。

关键词: 壳聚糖, 改性, 水凝胶, 吸附剂, 铜离子

Abstract: A series of adsorbents synthesized from chitosan-grafted-methacrylic acid/acrylamide/sodium allyl sulfonate (CTS-g-MAA/AM/SAS) composite hydrogels with various amounts of SAS were prepared. The effects of particle size, dosage of composite hydrogel, the pH value and initial concentration of Cu2+ in solution on the adsorption capacity were investigated. The results showed that a adsorption capacity of the CTS-g-MAA/AM/SAS composite hydrogels was increased with the increasing of pH value. A maximum absorption amount of Cu2+ of 823 mg/g was observed using 0.1 g/25 mL absorbent with particle size of 0.074-0.2 mm under pH value of 6.0. Freundlich, Langmuir plots and their isotherm coefficients for the adsorption of Cu2+ indicated a multilayer adsorption behavior using this adsorbent.

Key words: chitosan, modified, hydrogel, bioadsorbent, copper (Ⅱ) ions

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