Abstract Phenolic compounds are toxic pollutants that are harmful to the human body and aquatic environments, with carcinogenic potential and frequently found in industrial effluents at high levels. Adsorption processes are often employed for the removal of these compounds. Mesoporous materials based on modified silica with amine have been used as adsorbents and can be considered promising for this job due to its high selectivity and better adsorption capacity when compared to materials without any modifications. In addition, adsorption studies can be performed using ultrasound as a mixing mechanism, improving mass transfer through cavitation and acoustic current. In this context, the goal of this study is to modify the surface of mesoporous silica with 3-aminopropyltriethoxysilane (APTES) and to evaluate its efficiency in the adsorption of phenol in an ultrasonic bath. In the phenol adsorption experiments, the Si-APTES showed higher adsorption capacity (12 mg g−1) than the SiO2 (2 mg g−1). The kinetic models of pseudo second-order have shown to be good fits to the experimental data. The adsorption equilibrium data of the phenol on the materials studied were best described in the Langmuir isotherm.

中文翻译：

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胺改性二氧化硅表面作为吸附剂在超声辅助苯酚吸附中的应用

摘要 酚类化合物是一种有毒污染物，对人体和水生环境有害，具有致癌潜力，在工业废水中含量较高。吸附过程通常用于去除这些化合物。基于改性二氧化硅和胺的介孔材料已被用作吸附剂，并且与未经任何改性的材料相比，由于其高选择性和更好的吸附能力，因此被认为有希望用于这项工作。此外，可以使用超声波作为混合机制进行吸附研究，通过空化和声流改善传质。在这种情况下，本研究的目的是用 3-氨基丙基三乙氧基硅烷 (APTES) 改性介孔二氧化硅的表面，并评估其在超声波浴中吸附苯酚的效率。在苯酚吸附实验中，Si-APTES 显示出比 SiO2 (2 mg g-1) 更高的吸附容量 (12 mg g-1)。伪二阶动力学模型已显示出与实验数据的良好拟合。苯酚在所研究材料上的吸附平衡数据在朗缪尔等温线中得到了最好的描述。