文献类型： 外文期刊

作者： Zhou, Yan ¹ ; Lan, Yongtao ¹ ; Short, Michael Douglas ² ; Shi, Juanjuan ⁴ ; Zhang, Qiugui ⁵ ; Xu, Junhao ¹ ; Qian, Gujie ⁶ ;

作者机构： 1.Wuyi Univ, Sch Ecol & Resource Engn, Wuyishan 354300, Peoples R China

2.Arris Pty Ltd, Adelaide, SA 5064, Australia

3.Univ South Australia, Future Ind Inst, Sci Technol Engn & Math STEM, Adelaide, SA 5095, Australia

4.Zhejiang Acad Agr Sci, Hangzhou 310021, Peoples R China

5.Fujian Hengxiang Co Ltd, Songxi 353500, Peoples R China

6.Flinders Univ S Australia, Coll Sci & Engn, Adelaide, SA 5042, Australia

关键词： Chinese sugarcane bagasse; KOH activated; biochar; adsorption; norfloxacin removal

期刊名称：TOXICS （ 影响因子：4.6； 五年影响因子：4.8 ）

ISSN：

年卷期： 2023 年 11 卷 11 期

页码：

收录情况： SCI

摘要： Bagasse-derived biochar (SCB750) was prepared at 750 degrees C using Chinese sugarcane bagasse as a carbon source and then modified with KOH for the removal of the antibiotic norfloxacin (NOR) from aqueous solutions. 3K-SCB750, prepared using a solid-to-liquid mass ratio of bagasse:KOH = 1:3, was found to have the best adsorption performance for NOR. Under the conditions of pH 5, 25 degrees C, 2.4 g L-1 adsorbent, and 300 mg L-1 NOR, its adsorption of NOR reached equilibrium (97.5% removal) after 60 min. The adsorption behaviours were in line with the quasi-second-order kinetic and Langmuir isotherm models, respectively. The maximum theoretical adsorption capacity reached up to 157.4 mg center dot g-1 at 40 degrees C. The thermodynamic parameters showed that the adsorption of NOR onto 3K-SCB750 was a spontaneous, endothermic, and physical process. In addition, Brunauer-Emmett-Teller analysis (BET), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman spectroscopy were conducted to investigate the structural and adsorption properties of 3K-SCB750. Fourier transform infrared spectroscopy (FTIR) was also applied to understand the mechanism of adsorption of NOR onto 3K-SCB750. All of the results indicated that 3K-SCB750 had a large specific surface area of 1038.8 m2 center dot g-1, an average pore size of 1.9 nm, and hierarchical structures with random pores and cracks for efficient removal of NOR. NOR adsorption mechanisms on 3K-SCB750 were related to the pore-filling effect and electrostatic attraction. Therefore, 3K-SCB750 biochar may be used as a promising adsorbent of antibiotics in wastewaters.