Data for: A comparative adsorption study of benzophenone-3 onto synthesized lipophilic organosilicate, Laponite and montmorillonite

In this study, the adsorption of a hydrophobic molecule, benzophenone-3 (BZ-3) was investigated onto three adsorbents: synthesized lipophilic organosilicate (OSL), Laponite (Lap) and montmorillonite (Mt). A comparative study for all adsorbents with batch adsorption experiments was achieved to determine the optimal conditions. The effects of the main experimental parameters were determined such as solvent, pH, temperature, initial concentration of BZ-3 and contact time. The adsorption capacity was evaluated by means of HPLC analysis equipped with UV detection and the adsorbent - BZ-3 complexes were characterized by means of Dynamic Light Scattering (DLS) analysis and Attenuated Total Reflectance - Fourier Transform InfraRed (ATR - FTIR) spectroscopy. Finally, the adsorption isotherm equilibrium was described according to Langmuir, Freundlich and Temkin models. The results showed that optimal value of the adsorbed BZ-3 for all adsorbents was found at pH 10, at 38 °C, with BZ-3 concentration of 2.5 g/L during 24 h of contact time. The results obtained showed a promising capacity of the OSL to adsorb BZ-3 (340 mg of BZ-3/g of adsorbent) compared to Lap (137 mg/g) and Mt (192.3 mg/g). Langmuir model fitted the best with OSL and Mt adsorption while Freundlich model fitted the best with Lap adsorption.

本研究针对三种吸附剂——合成亲脂性有机硅酸盐（lipophilic organosilicate, OSL）、拉帕石（Laponite, Lap）以及蒙脱石（montmorillonite, Mt）——开展了疏水性分子二苯甲酮-3（benzophenone-3, BZ-3）的吸附实验。为确定最优吸附条件，本研究针对全部三种吸附剂开展批量吸附对比实验，考察了溶剂、pH值、温度、BZ-3初始浓度及接触时间等核心实验参数对吸附过程的影响。采用配备紫外检测器的高效液相色谱（High Performance Liquid Chromatography, HPLC）法评估吸附容量，并通过动态光散射（Dynamic Light Scattering, DLS）分析与衰减全反射-傅里叶变换红外（Attenuated Total Reflectance-Fourier Transform InfraRed, ATR-FTIR）光谱法对吸附剂-BZ-3复合物进行表征。最后，采用朗缪尔（Langmuir）、弗罗因德利希（Freundlich）以及滕金（Temkin）三种等温吸附模型对吸附平衡等温线进行拟合分析。实验结果表明，所有吸附剂对BZ-3的最优吸附条件均为：pH值10、温度38℃、BZ-3初始浓度2.5 g/L、接触时间24小时。结果显示，相较于拉帕石（137 mg/g）与蒙脱石（192.3 mg/g），合成亲脂性有机硅酸盐对BZ-3展现出更优异的吸附性能，其吸附容量可达340 mg BZ-3/g吸附剂。朗缪尔模型对合成亲脂性有机硅酸盐与蒙脱石的吸附过程拟合效果最优，而弗罗因德利希模型则更适配拉帕石的吸附行为。