Adsorption of gemfibrozil (GF) from aqueous solution by highly/lowly graphitized carbon black (GCB-H/GCB-L) was investigated by batch and fixed-bed experiments. Results showed that the adsorption of GF onto GCB greatly depended on solution pH and graphitization of carbon. The pseudo-second-order kinetic model was found to be more appropriate in describing the adsorption processes of two GCBs. The adsorption equilibriums were well fitted with the Langmuir isotherm model, and GCB-H exhibited a higher adsorption capacity of 47.68 mg g−1 at 298 K, compared with GCB-L of 4.33 mg g−1. GCB-H achieved 69.76% GF removals in simulated water after 6 h, indicating its potential practicability. The GCBs were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR), and the results indicated that the [Formula: see text]-[Formula: see text] interaction was strongly involved in the adsorption. Thermodynamic studies further suggested that the adsorption of GF on GCB-H was exothermic, which could happen spontaneously at any temperature mainly through [Formula: see text]-[Formula: see text] interaction for physical adsorption on the surface of the plane.

中文翻译：

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吉非贝齐吸附在石墨化炭黑 (GCB) 上的平衡、动力学和热力学研究

通过批量和固定床实验研究了高/低石墨化炭黑 (GCB-H/GCB-L) 对水溶液中吉非贝齐 (GF) 的吸附作用。结果表明，GF在GCB上的吸附很大程度上取决于溶液pH和碳的石墨化。发现准二级动力学模型更适合描述两种 GCB 的吸附过程。吸附平衡与 Langmuir 等温线模型拟合良好，GCB-H 表现出更高的吸附容量，为 47.68 mg g-1在 298 K，而 GCB-L 为 4.33 mg g-1. GCB-H在6小时后在模拟水中达到了69.76%的GF去除率，表明其具有潜在的实用性。通过X射线衍射（XRD）、扫描电子显微镜（SEM）和傅里叶变换红外光谱（FTIR）对GCBs进行了表征，结果表明[分子式：见正文]-[分子式：见正文]相互作用强烈。参与吸附。热力学研究进一步表明，GF在GCB-H上的吸附是放热的，它可以在任何温度下自发发生，主要通过[公式：见正文]-[公式：见正文]相互作用在平面表面进行物理吸附。