| 累托石对左氧氟沙星的吸附研究 |
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| 引用本文： | 杨凤,曾丽璇,罗继文,张秋云,康园.累托石对左氧氟沙星的吸附研究[J].华南师范大学学报(自然科学版),2019,51(1):56-62. |
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| 作者姓名： | 杨凤 曾丽璇 罗继文 张秋云 康园 |
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| 作者单位： | 华南师范大学化学与环境学院,广州,510006;华南师范大学化学与环境学院,广州,510006;华南师范大学化学与环境学院,广州,510006;华南师范大学化学与环境学院,广州,510006;华南师范大学化学与环境学院,广州,510006 |
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| 基金项目： | 强化生物降解的低成本模块化农家乐餐饮污水处理技术研究 |
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| 摘 要： | 累托石是一种天然间层黏土矿物，具有强稳定性、高分散性以及良好的吸附性.文章利用累托石良好的吸附特性，以其为吸附材料，通过静态吸附实验研究了累托石对水体中左氧氟沙星的吸附机理；并采用BET、XRF、FT-IR等表征手段对累托石结构和性能进行了分析. 结果表明:累托石主要成分为SiO2和Al2O3，比表面积为7.54 m2/g，孔径为3.62 nm，层间距为2.50 nm，其对左氧氟沙星的吸附过程更加符合Langmuir等温模型和准二级动力学模型，且在pH6时吸附效果最佳，最大吸附量达到63.38 mg/g；主要吸附机理是离子交换.
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| 关 键 词： | 累托石 抗生素 左氧氟沙星 吸附 离子交换 |
| 收稿时间： | 2017-11-28 |
The Adsorption of Levofloxacin onto Rectorite |
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| Institution: | 1.(School of Chemistry and Environment,South China Normal University,Guangzhou 510006,China) |
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| Abstract: | Rectorite is a natural interlayer clay mineral with good stability, high dispersion and good adsorbability performance. The behavior and mechanism of rectorite adsorbing levofloxacin in solution is studied with static adsorption experiments. The structural composition and physical properties of rectorite were characterized with BET, XRF and FT-IR. The specific surface area, diameter and the basal spacing of rectorite were 7.54 m2/g, 3.62 nm and 2.50 nm, respectively. The main components of rectorite were SiO2 and Al2O3. The results showed that the adsorption process fit the Langmuir isothermal model and pseudo-second-order kinetic model well. The maximum removal rate occurred at pH6, and the maximum adsorption capacity was 63.38 mg/g. The main adsorption mechanism was ion exchange. |
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