【摘要】 该文采用水热法将镁铁层状双金属氢氧化物（MgFe-LDH）负载到活性炭纤维（ACF）上，制得MgFe-LDH/ACF（MFLA），并将ACF和MFLA作为吸附剂用于考察溶液初始p H、吸附时间、反应温度等对环丙沙星（CIP）吸附效果的影响。结果表明，MgFe-LDH已被固定在ACF上，且在Mg²⁺和Fe³⁺摩尔比为3∶1时制备的最佳MFLA（3-MFLA）晶型更完整。当CIP的初始浓度为20 mg/L时，ACF和3-MFLA分别在360、60 min时达到吸附平衡，其吸附量分别为3.00 mg/g和19.31 mg/g。拟二级动力学模型和Langmuir等温线模型均可准确地描述ACF和3-MFLA对CIP的吸附行为。CIP主要通过静电引力、氢键、离子交换、π-π相互作用和金属-碳π相互作用被3-MFLA吸附。此外，抗干扰实验、循环再生实验及固定床动态吸附实验结果均表明3-MFLA具有较高的实际应用潜力。更多还原

【Abstract】 MgFe-LDH/ACF（MFLA） was produced by loading magnesium-iron layered bimetallic hydroxide（MgFe-LDH）onto activated carbon fibres（ACF） using a hydrothermal method. ACF and MFLA were used as adsorbents for examining the effects of solution initial pH, adsorption time and reaction temperature on ciprofloxacin（CIP） adsorption. Results showed that MgFe-LDH was loaded on ACF and the optimum MFLA（3-MFLA） prepared at a Mg²⁺/Fe³⁺ molar ratio of 3∶1 had a more complete crystalline shape. When CIP initial concentration was 20 mg/L, the adsorption equilibrium of ACF（3.00 mg/g） and 3-MFLA（19.31 mg/g） reached at 360 and 60 min, respectively. Pseudo-first-order kinetic model and Langmuir model can more accurately describe the CIP adsorption behaviors on ACF and 3-MFLA. CIP was adsorbed by 3-MFLA mainly through electrostatic attraction, hydrogen bonding, ion exchange, π-π interaction and metal-carbon π interaction. In addition, the results of anti-interference experiments, cyclic regeneration experiments and fixed-bed dynamic adsorption experiments showed that 3-MFLA had high potential for practical application.更多还原