壳聚糖对水中铝离子的吸附性能.pdfVIP

第17 卷 第3 期 化 学 研 究 Voi. 17 No. 3 2006 年9 月 CHEMICAL RESEARCH Sep. 2006 壳聚糖对水中铝离子的吸附性能 1，2 1 2 刘秉涛 ，娄渊知 ，姜安玺 （1. 华北水利水电学院环境工程系，河南 郑州4500 11； 2 . 哈尔滨工业大学 市政环境工程学院，黑龙江 哈尔滨 150090 ） 摘 要：研究了静态条件下壳聚糖对铝离子的吸附性能，探讨了壳聚糖吸附Ai3 + 的最佳条件. 结果表明，壳聚糖 对水溶液中的Ai3 + 吸附速度比较快，饱和吸附量为49 . 0 mg ·g - 1 ，适宜的pH 为4 ，温度影响不大. 对等温吸附 平衡数据进行分析，符合Langmuir 吸附模型. 对壳聚糖-铝（ ）配合物的红外光谱及电子能谱分析表明，壳聚糖 分子中的氨基与Ai3 + 发生了配位作用，吸附机理以单分子层化学吸附为主. 关键词：壳聚糖；铝；吸附；配位 中图分类号：0 647 . 3 文献标识码：A 文章编号：1008 - 1011（2006 ）03 - 0046 - 03 Adsorption Property of Chitosan Towards Aluminium ( !) 1, 2 1 2 LIU Bing-tao , L0U Yuan-zhi , JIANG An-xi ( 1. Department of Enuironment, North China Institute of Water Conseruancy and Hydroelectric Power, Zhengzhou 450011, Henan, China; 2. Harbin Institute of Technology, School of Municipal and Enuironmental Engineering, Harbin 150090, Heilongj iang, China) Abstract : The adsorption of Ai3 + onto chitosan ( CTS) was studied under static condition. The resuits showed that the adsorption of Ai3 + onto chitosan was a fast process with 49 mg - g - 1 capacity, whiie the adeguate pH was 4 without temperature effect. The adsorption process was in accordance with Langmuir isotherm. The FTIR, XPS anaiyses of formed Chitosan -Ai( ) indicate that the adsorption was from the coordination of -NH2 groups of chitosan to Ai3 + . The mechanicsm was mainiy controiied by chemicai