摘要
壳聚糖(CTS)C_2上的氨基可与水杨醛、丙酮酸和α-酮戊二酸进行Shcffi缩合反应,分别合成水杨醛改性壳聚糖(SCTS)、丙酮酸改性壳聚糖(PCTS)和α-酮戊二酸改性壳聚糖(KCTS),被取代度分别为57.2%,49.5%和55.7%。研究改性壳聚糖絮凝剂SCTS、PCTS和KCTS分别对Cu2+、Zn2+和Pb2+的吸附性能。结果表明静态吸附性能KCTS>PCTS>SCTS,通过使用正交法考察金属离子浓度,吸附温度,吸附时间和溶液p H值对吸附性能的影响。其中金属离子浓度,吸附温度和溶液p H值对金属离子的去除能力影响较大而吸附时间几乎没有影响。
Chitosan （CTS） can be carried out Shcffi condensation reaction on the amino C_2 with salicylaldehyde, pyruvate andα- ketoglutarate to synthesiz salicylaldehyde modified chitosan （SCTS）, pyruvic acid modified chitosan sugar （PCTS） and α-ketoglutarate modified chitosan （KCTS）, with which the degree of substitution was 57.2%, 49.5% and 55.7%. Research was carriedout on adsorption properties of chitosan flocculants SCTS, PCTS and KCTS respectively, using Cu2＋, Zn2＋ and Pb2＋ as adsorbate. Theresults show that the static adsorption performance with the following sequencehas： KCTS〉 PCTS〉 SCTS. Orthogonal method wasused to investigate metal ion concentration, adsorption temperature, the adsorption of time and pH on the adsorption properties. It wasfound that the metal ion concentration, adsorption temperature and solution pH has greater impact, while the adsorption time has littleeffect.
出处
《唐山师范学院学报》
2016年第2期48-51,共4页
Journal of Tangshan Normal University
基金
福建省专业综合改革试点(ZYZH12002)
福建省实验教学示范中心(SYSP12001)
国家级大学生创新项目(201412992005)
关键词
壳聚糖
改性
正交实验
金属离子
吸附
chitosan
modification
orthogonal experiment
metal ion
adsorption
