硼酸盐改性凹凸棒土制备壳聚糖-羟乙基纤维素气凝胶吸附罗丹明B染料性能研究  

Chitosan-Hydroxyethyl Cellulose Aerogels Prepared from Borate-Modified Attapulgite for the Adsorption of Rhodamine B Dye

作　　者：欧红香 邓林蕾 孙伟凯 陈子威 OU Hongxiang;DENG Linlei;SUN Weikai;CHEN Ziwei(School of Safety Science and Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学环境与安全工程学院,江苏常州213164

出　　处：《水处理技术》2025年第1期34-39,46,共7页Technology of Water Treatment

基　　金：国家自然科学基金项目(22378028);江苏省研究生教育教学改革研究项目(2022_55);常州大学教育教学研究重点课题(GJY2021005)。

摘　　要：采用四硼酸钠(STB)改性ATP,引入硼酸基团提高了材料对染料的选择性,后与壳聚糖(CS)和羟乙基纤维素(HEC)交联,制备STB-ATP@CS-HEC气凝胶,用于去除罗丹明B染料(RhB)。理化表征结果表明,该气凝胶具有良好的溶胀性,60 min达到溶胀平衡,溶胀率为1 172.5%。基于准二级模型、Temkin和Freundlich等温线模型,可以较好地描述气凝胶对RhB染料的吸附行为,主要是化学多分子层吸附。在303 K时,将20 mg材料投加到50 mL初始浓度为250 mg/L的RhB染料中,吸附量178.83 mg/g。材料有良好的吸附再生能力,在染料废水处理领域具有良好的应用前景。Sodium tetraborate was utilized for modifying the intaglio clay,introducing the boric acid group to enhance the material's selectivity towards the dye.It was then cross-linked with chitosan and hydroxyethyl cellulose to fabricate STB-ATP@CS-HEC aerogel,intended for the removal of rhodamine B dye.The physicochemical characterization results revealed favorable swelling properties of the aerogel,reaching equilibrium within 60 minutes at a swelling ratio of 1172.5%.The adsorption behavior of the aerogel on rhodamine B dye could be accurately described using the quasisecondary model,Temkin and Freundlich isotherm models,primarily indicating chemical monomolecular layer adsorption.When 20 mg of the 303 K material was introduced into 50 mL of RhB dye with an initial concentration of 250 mg/L,the adsorption amount reached 178.83 mg/g.The material exhibited promising adsorption regeneration capability,thus demonstrating its potential for application in dye wastewater treatment.

关 键 词：凹凸棒土 硼酸盐 壳聚糖 羟乙基纤维素 罗丹明B 吸附 

分 类 号：TQ424.2[化学工程]