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A l3+的最佳条件.结果表明,壳聚糖对水溶液中的A l3+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Langmu ir吸附模型.对壳聚糖-铝(Ⅲ)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A l3+发生了配位作用,吸附机理以单分子层化学吸附为主.
The adsorption of Al^3 ＋ onto chitosan（CTS） was studied under static condition. The results showed that the adsorption of Al^3 ＋ onto chitosan was a fast process with 49 mg·g^-1 capacity, while the adequate pH was 4 without temperature effect. The adsorption process was in accordance with Langmuir isotherm. The FTIR, XPS analyses of formed Chitosan -Al（Ⅲ） indicate that the adsorption was from the coordination of -NH2groups of chitosan to Al^3 ＋. The mechanicsm was mainly controlled by chemical monolayer adsorption.
出处
《化学研究》
CAS
2006年第3期46-48,63,共4页
Chemical Research
关键词
壳聚糖
铝
吸附
配位
chitosan, Al^3 ＋
adsorption
coordination
