Abstract

Mesoporous carbon is a promising new material for adsorption and purification of resveratrol. It is essential to explore the adsorption process to meet the requirements for practical application of an adsorbent. In this work, the adsorption of resveratrol onto mesoporous carbon (MC) was investigated using both static and dynamic adsorption methods. MC exhibited a high adsorption capacity for resveratrol when compared to other previously reported adsorbents. The adsorption isotherm and kinetics data fitted the Freundlich and pseudo-second-order models well. Film diffusion was the rate-limiting step. The thermodynamic study results indicated that MC adsorbed resveratrol via spontaneous, endothermic physical adsorption. It was found that pore structure, hydrophobic interactions, hydrogen-bonding and π–π stacking were the major factors affecting adsorption onto MC. Dynamic adsorption experiments showed that resveratrol purity was increased 8.18-fold in a single treatment with MC.

摘要

介孔炭是一种很有前景的吸附纯化白藜芦醇的新材料。必须探索吸附过程以满足吸附剂实际应用的要求。在这项工作中，使用静态和动态吸附方法研究了白藜芦醇在介孔碳 (MC) 上的吸附。与其他先前报道的吸附剂相比，MC 对白藜芦醇表现出高吸附能力。吸附等温线和动力学数据很好地拟合了 Freundlich 和准二级模型。薄膜扩散是限速步骤。热力学研究结果表明，MC通过自发的吸热物理吸附吸附白藜芦醇。发现孔结构、疏水相互作用、氢键和π-π堆积是影响MC吸附的主要因素。动态吸附实验表明白藜芦醇的纯度在单次 MC 处理中提高了 8.18 倍。