Abstract

In this study, a nanocomposite of activated carbon modified by copper hydroxide nanoparticles and stearic acid with high hydrophobic–oleophilic characteristics was synthesized, characterized and used to remove vegetable oils from oil/water emulsion. Effects of different parameters such as initial pH, temperature, and concentration on oil removal from emulsion were investigated. Langmuir and Freundlich adsorption isotherm models were employed to analyze equilibrium data. The results showed that maximum oil/water separation efficiency obtained about 100% at pH 7, the maximum oil adsorption capacity obtained 6.27 g/g, and the oil adsorption process by the nanocomposite followed the Freundlich adsorption isotherm. The thermodynamic results showed that the oil adsorption process with synthetic adsorbent is exothermic and spontaneous. The results showed that the resulted nanocomposite is an efficient and reusable adsorbent to remove vegetable oils from oil/water emulsion.

中文翻译：

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用于油/水乳液分离的改性活性炭/Cu(OH)2纳米复合材料

摘要

在这项研究中，合成了一种由氢氧化铜纳米颗粒和硬脂酸改性的活性炭纳米复合材料，具有高疏水亲油特性，用于从油/水乳液中去除植物油。研究了不同参数（如初始 pH 值、温度和浓度）对从乳液中去除油的影响。Langmuir 和 Freundlich 吸附等温线模型用于分析平衡数据。结果表明，在pH 7时，最大油水分离效率约为100%，最大吸油量可达6.27 g/g，纳米复合材料的吸油过程遵循Freundlich吸附等温线。热力学结果表明，合成吸附剂吸附油的过程是放热自发的。