【摘要】 本文以芦苇生物质和FeCl₃·6H₂O为原料，采用浸渍-热解法，控制浸渍比率、热解温度和热解时间制备磁性生物炭（Biochar, MB）,再与壳聚糖（Chitosan, CTS）复合，制备了壳聚糖/磁性生物炭复合物（Magnetic biochar, CMB）。利用田口分析方法，以环丙沙星（Ciprofloxacin, CIP）为目标物，以吸附容量为评价指标，优化了CMB的制备条件。使用傅里叶变换红外光谱（FTIR）、X射线衍射分析（XRD）、X射线光电子能谱（XPS）、扫描电镜（SEM）、振动样品磁强计（VSM）和全自动比表面及孔隙度分析仪（BET）对其结构进行了表征。研究了CMB对CIP的吸附动力学和吸附热力学。结果表明，CMB的最佳制备条件为浸渍比率1∶3、热解温度800℃、热解时间4 h,以柠檬酸为交联剂、MB与CTS的质量比5∶1。CMB对CIP的吸附更符合Avrami模型和拟二级动力学模型，吸附过程可能是膜扩散和颗粒内扩散共同作用的结果。Freundlich吸附等温方程能较好地描述CMB对CIP的吸附行为。热力学参数表明，CMB对CIP的吸附是一个自发的吸热反应。更多还原

【Abstract】 Magnetic biochar（MB） was prepared from reed biomass and FeCl₃·6H₂O by impregnation-pyrolysis method with controlled impregnation ratio, pyrolysis temperature and pyrolysis time. And then MB compounded with chitosan（CTS） to prepare chitosan/magnetic biochar composites（CMB）. The preparation conditions of CMB were optimized using Taguchi analysis with ciprofloxacin（CIP） as the target and adsorption capacity as the evaluation index. The structure of prepared CMB was characterized by Fourier transform infrared spectroscopy（FTIR）, X-ray diffraction（XRD）, X-ray photoelectron spectroscopy（XPS）, scanning electron microscopy（SEM）, vibrating sample magnetometer（VSM） and brunauer emmett teller（BET）. Investigated the adsorption kinetics and thermodynamics of CMB on CIP. The results indicated that the optimum conditions for the preparation of CMB were impregnation ratio 1∶3, pyrolysis temperature 800 ℃, pyrolysis time 4 h, citric acid as cross-linking agent and mass ratio of MB and CTS 5∶1. The adsorption kinetics was in best agreement with the Avrami model and pseudo-second-order model, proved that adsorption process was probably due to the interaction of film diffusion and intra-particle diffusion. The Freundlich isotherms can be applied to CIP adsorption by CMB. The thermodynamic parameters indicated that the CIP adsorption process was spontaneous and endothermic.更多还原