| 纳米氧化铝改性凝胶球对四环素吸附性能分析 |
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| 引用本文： | 廖权,骆华勇,荣宏伟,陈炳伟,梁莹. 纳米氧化铝改性凝胶球对四环素吸附性能分析[J]. 环境工程, 2020, 38(9): 36-42. DOI: 10.13205/j.hjgc.202009006 |
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| 作者姓名： | 廖权 骆华勇 荣宏伟 陈炳伟 梁莹 |
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| 作者单位： | 广州大学 土木工程学院, 广州 510006 |
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| 基金项目： | 广州大学新进"优秀青年博士"培养计划项目;国家自然科学基金;广东省自然科学基金 |
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| 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。
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| 关 键 词： | 聚乙烯醇 海藻酸钠 纳米氧化铝 吸附 四环素 |
| 收稿时间： | 2019-10-16 |
ADSORPTION PERFORMANCE OF TETRACYCLINE ONTO NANO-ALUMINA MODIFIED GEL BEADS |
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| LIAO Quan,LUO Hua-yong,RONG Hong-wei,CHEN Bing-wei,LIANG Ying. ADSORPTION PERFORMANCE OF TETRACYCLINE ONTO NANO-ALUMINA MODIFIED GEL BEADS[J]. Environmental Engineering, 2020, 38(9): 36-42. DOI: 10.13205/j.hjgc.202009006 |
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| Authors: | LIAO Quan LUO Hua-yong RONG Hong-wei CHEN Bing-wei LIANG Ying |
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| Affiliation: | College of Civil Engineering, Guangzhou University, Guangzhou 510006, China |
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| 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. |
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