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化工进展 2015

4种触须式强碱性阴离子交换树脂的制备及其对曙红Y的吸附性能

DOI: 10.16085/j.issn.1000-6613.2015.05.032

李庭,周成显怡,谢通慧,刘文彬

Keywords: 大分子多糖,触须式,阴离子交换,制备,吸附

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Abstract:

以不同的大分子多糖为骨架材料,通过三步反应以触须式引入季铵基团,从而制得4种具有高通量的强碱性阴离子交换树脂淀粉基树脂、微晶纤维素基树脂、纤维素微球基树脂及琼脂糖微球基树脂.研究树脂对曙红Y的吸附,探讨了时间、溶液pH值和染料初始浓度对染料去除率的影响.结果表明,4种树脂在pH值为1～12范围内对染料的去除效果稳定;5min内4种树脂基本都达到了吸附平衡,其中琼脂糖微球基树脂按1g/L投放时,在2min内即可将200mg/L的曙红Y完全去除;通过拟合得知,4种树脂的吸附动力学符合拟一级动力学方程,等温线符合Freundlich等温线方程.这4种树脂尤其是琼脂糖微球基树脂在吸附速率及吸附量上均具有较大优势,但4种树脂的原料成本不一,可根据需求选用不同的树脂.

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