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化工学报  2015 

新型多胺羧甲基壳聚糖的合成及对Ni(Ⅱ)的吸附特性

DOI: 10.11949/j.issn.0438-1157.20141197, PP. 1785-1791

Keywords: 壳聚糖,修饰,吸附,Ni2+,吸附动力学

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Abstract:

为了提高壳聚糖(CS)吸附重金属的能力,对表面含有氨基乙酸基团的新型多胺羧甲基壳聚糖(CTGCS)进行了合成研究。其合成过程为:以CS为原料,通过戊二醛交联得到壳聚糖树脂(GCS),再经四乙烯五胺改性,得到多胺壳聚糖树脂(TGCS),最后采用一氯乙酸进行修饰,得到了目标产物(CTGCS)。通过对CS、GCS、TGCS和CTGCS进行红外光谱和XPS分析,对合成过程进行了分析。吸附结果表明,CTGCS对Ni2+的吸附规律符合Freundlich等温式模型,吸附过程符合拟二级动力学模型,最大平衡吸附量为533.8mg·g-1,比TGCS的吸附量增加了1.5倍。

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