Mashile Geaneth Pertunia, Dimpe Kgokgobi Mogolodi, Nomngongo Philiswa Nosizo
Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein 2028, South Africa.
DSI/NRF SARChI Chair: Nanotechnology for Water, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, South Africa.
Polymers (Basel). 2020 May 12;12(5):1102. doi: 10.3390/polym12051102.
The application of a magnetic mesoporous carbon/β-cyclodextrin-chitosan (MMPC/Cyc-Chit) nanocomposite for the adsorptive removal of danofloxacin (DANO), enrofloxacin (ENRO) and levofloxacin (LEVO) from aqueous and environmental samples is reported in this study. The morphology and surface characteristics of the magnetic nanocomposite were investigated by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) adsorption-desorption and Fourier transform infrared spectroscopy (FTIR). The N adsorption-desorption results revealed that the prepared nanocomposite was mesoporous and the BET surface area was 1435 m g. The equilibrium data for adsorption isotherms were analyzed using two and three isotherm parameters. Based on the correlation coefficients (R), the Langmuir and Sips isotherm described the data better than others. The maximum monolayer adsorption capacities of MMPC/Cyc-Chit nanocomposite for DANO, ENRO and LEVO were 130, 195 and 165 mg g, respectively. Adsorption thermodynamic studies performed proved that the adsorption process was endothermic and was dominated by chemisorption
本研究报道了磁性介孔碳/β-环糊精-壳聚糖（MMPC/Cyc-Chit）纳米复合材料用于从水性和环境样品中吸附去除达氟沙星（DANO）、恩诺沙星（ENRO）和左氧氟沙星（LEVO）的应用。通过X射线衍射（XRD）、布鲁诺尔-埃米特-特勒（BET）吸附-脱附和傅里叶变换红外光谱（FTIR）研究了磁性纳米复合材料的形态和表面特性。N吸附-脱附结果表明，制备的纳米复合材料为介孔材料，BET表面积为1435 m²/g。使用两种和三种等温线参数分析了吸附等温线的平衡数据。基于相关系数（R），朗缪尔等温线和西普斯等温线对数据的描述优于其他等温线。MMPC/Cyc-Chit纳米复合材料对DANO、ENRO和LEVO的最大单层吸附容量分别为130、195和165 mg/g。进行的吸附热力学研究证明，吸附过程是吸热的，且以化学吸附为主。
