Photocatalytic hydrogel layer supported on alkali modified straw fibers for ciprofloxacin removal from water

文献类型： 外文期刊

第一作者： Huang, Xiaoli

作者： Huang, Xiaoli;Wu, Song;Tang, Shizhan;Huang, Li;Zhu, Dingfang;Hu, Qi

作者机构：

关键词： Antibiotic; Wastewater; Titanium dioxide; Adsorption; Photocatalysis; Biomass

期刊名称：JOURNAL OF MOLECULAR LIQUIDS （ 影响因子：6.165； 五年影响因子：5.642 ）

ISSN： 0167-7322

年卷期： 2020 年 317 卷

页码：

收录情况： SCI

摘要： Rice straw is a potential green resource due to its low cost and high renewability. From the perspective of waste reutilization and green chemistry, an alkali-cooking modified rice straw fiber (AMSF) was prepared as a biosorbent to remove ciprofloxacin (CPFX) from water. To gain the ability of self-generation, a TiO2 hydrogel layer was coated on the surface of AMSF. The adsorption equilibrium was reached at approximately 35 min for AMSF, and the maximum adsorption capacity was 93.5 mg/g. The CPFX removal ability was enhanced by the TiO2-gel layer, especially under ultraviolet, and the CPFX removal quantity by TiO2@AMSF can be 153, 112, and 60 mg/g under ultraviolet, natural light and dark, respectively. The whole adsorption-degradation reaction lasted up to 450 min, and the pseudo-second-order model showed better linearity compared to the Langmuir Hinshelwood. The CPFX removal ability of TiO2@AMSF in fluoroquinolone antibiotics system was also evaluated, and the adsorption and photodegradation effects were the removal mechanism. Providing more TiO2-gel layers or adding a UV irradiation can be an effective way to regenerate saturated TiO2@AMSF. (C) 2020 Elsevier B.V. All rights reserved.

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