纳米氧化铝改性凝胶球对四环素吸附性能分析

廖权; 骆华勇; 荣宏伟; 陈炳伟; 梁莹

doi:10.13205/j.hjgc.202009006

纳米氧化铝改性凝胶球对四环素吸附性能分析

doi: 10.13205/j.hjgc.202009006

广州大学土木工程学院, 广州 510006

基金项目:

国家自然科学基金（51778155，51608133）；广东省自然科学基金（2017A030313310）；广州大学新进"优秀青年博士"培养计划项目（YB201718）。

详细信息

作者简介:
廖权(1996-),男,硕士研究生,主要研究方向为有机高分子合成及其吸附应用。1150385910@qq.com

通讯作者:
荣宏伟(1973-),男,博士,教授,主要研究方向为水处理研究。rhwcn@139.com

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出版历程
- 收稿日期: 2019-10-16

ADSORPTION PERFORMANCE OF TETRACYCLINE ONTO NANO-ALUMINA MODIFIED GEL BEADS

College of Civil Engineering, Guangzhou University, Guangzhou 510006, China

摘要

摘要: 采用溶胶-凝胶法制备纳米氧化铝改性聚乙烯醇-海藻酸钙凝胶球（SA-PVA-AlNPs），用于吸附去除水溶液中的四环素。考察了纳米氧化铝负载量、初始溶液pH、离子强度对凝胶球吸附性能的影响。结果表明：复合纳米氧化铝有利于提高凝胶球的吸附性能；SA-PVA-ALNPs吸附四环素最佳pH值条件为pH=3；NaCl浓度的提高并未显著影响凝胶球对于四环素的吸附能力。准二级动力学可以较好地拟合SA-PVA-ALNPs对四环素吸附的动力学数据；Langmuir模型能更好地拟合等温吸附数据，最大吸附容量为75.90 mg/g。SA-PVA-ALNPs吸附四环素主要依靠阳离子架桥作用、n-π电子供体-受体相互作用以及氢键作用。
- 聚乙烯醇 /
- 海藻酸钠 /
- 纳米氧化铝 /
- 吸附 /
- 四环素
Abstract: Nano-alumina modified polyvinyl alcohol-calcium alginate gel spheres (SA-PVA-AlNPs) were prepared by sol-gel method for adsorption removal of tetracycline in aqueous solution. Effects of nano-alumina dosage, initial solution pH and ionic strength on adsorption properties of gel spheres were investigated. It was beneficial to improve the adsorption properties of gel beads; the optimum pH value of SA-PVA-ALNPs adsorbed tetracycline was 3; increase of NaCl concentration didn't significantly affect the adsorption capacity of tetracycline by gel beads. Pseudo-second order model kinetics could better fit the kinetics of SA-PVA-ALNPs adsorption on tetracycline. Langmuir model could better fit the isothermal adsorption data, and the maximum adsorption capacity was 75.90 mg/g. Adsorption of tetracycline by SA-PVA-ALNPs mainly depended on cation bridging, n-π electron donor-acceptor interaction and hydrogen bonding.
- polyvinyl alcohol /
- sodium alginate /
- nano-alumina /
- adsorption /
- tetracycline

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