复合磁性纳米凝胶球对典型抗生素的吸附特性

曾子君; 梁莹; 荣宏伟; 骆华勇; 廖权

doi:10.13205/j.hjgc.202205009

复合磁性纳米凝胶球对典型抗生素的吸附特性

doi: 10.13205/j.hjgc.202205009

广州大学土木工程学院, 广州 510006

基金项目:

广东省自然科学基金项目(2020A1515010856)

国家自然科学基金项目(51778155,51608133)

详细信息

作者简介:
曾子君(1995-),女,硕士,主要从事污水处理技术研究。queeniez2@163.com

通讯作者:
荣宏伟(1973-),男,教授,主要从事给水/污水处理理论与技术研究。rhwcn@139.com

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出版历程
- 收稿日期: 2021-05-03
- 网络出版日期: 2022-07-02

ADSORPTION PROPERTIES OF TYPICAL ANTIBIOTICS BY COMPOSITE MAGNETIC NANO-GEL BEADS

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

摘要

摘要: 以复合磁性纳米凝胶球(Fe₃O₄@PVA-SA-PAC)为吸附剂,探究其对水中磺胺甲噁唑(SMX)、环丙沙星(CIP)、甲氧苄啶(TMP)抗生素类污染物去除效果,并分析pH、投加量、污染物初始浓度、吸附时间等因素对吸附过程的影响。结果表明:pH=3时最有利于抗生素吸附;吸附量随着初始浓度增大而上升,随着投加量增加而下降;3种抗生素吸附表现为物理吸附和化学吸附共存、均质单分子层吸附与非均质多分子层吸附共同作用的状态。其中SMX与CIP吸附更符合准二级动力学模型,而TMP更符合准一级动力学模型;温度为308 K时,Langmuir与Freundlich方程均达到较高拟合度(0.938≤R²≤0.998),此时SMX、TMP和CIP的最大吸附量分别为47.188,59.649,96.468 mg/g;竞争性吸附试验表明复合凝胶球可同时吸附多种目标抗生素污染物,具备良好吸附应用前景。
- 抗生素 /
- 磁性纳米凝胶球 /
- 吸附剂 /
- 竞争性吸附
Abstract: The removal efficiency of antibiotic pollutants such as sulfamethoxazole(SMX), ciprofloxacin(CIP) and methoxyphenidine(TMP) were studied using magnetic nano-gel beads(Fe₃O₄@PVA-SA-PAC) composite, and the influences of pH, dosage, initial concentration of pollutants and adsorption time on the adsorption process were analyzed. The result showed that pH=3 was the optimal condition. The adsorption capacity increased with the increase of initial concentration and decreased with the increase of dosage. The adsorption of these three antibiotics by Fe₃O₄@PVA-SA-PAC showed the coexistence of physical and chemical adsorption, also homogeneous monolayer adsorption and heterogeneous multi-molecular layer adsorption. The adsorption of SMX and CIP was more consistent with the pseudo-first-order kinetic model, while TMP was more consistent with the pseudo-second-order kinetic model. At 308 K, both the Langmuir equation and Freundlich equation reached a high fitting degree(0.938 ≤ R² ≤ 0.998). By now, the maximum adsorption capacity of SMX, TMP and CIP were 47.188 mg/g, 59.649 mg/g and 96.468 mg/g, respectively. Competitive adsorption experiments showed that the composite gel beads could simultaneously adsorb a variety of target antibiotic pollutants, indicating a good application prospect of adsorption.
- antibiotics /
- magnetic nano-gel beads /
- adsorbent /
- competitive adsorption

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