Chemical Engineering Faculty, Sahand University of Technology, P.O. Box 51335-1996, Sahand New Town, Tabriz, Iran.
Environ Sci Pollut Res Int. 2021 Dec;28(48):69272-69285. doi: 10.1007/s11356-021-15295-2. Epub 2021 Jul 22.
The purposes of this work were to synthesize the core-shell magnetic and nonmagnetic supported bimetallic metal-organic frameworks (MOFs) on the walnut-based activated carbon by the facile preparation method to investigate the feasibility of the performance adsorption of hydroquinone in the aqueous solutions. Activated carbon as a substrate and nickel, copper, and trimesic acid were employed in the structure of the prepared MOFs. The adsorbents were characterized by XRD, FTIR, FESEM, EDX, TEM, BET, and VSM analysis. The goethite and magnetite phases were detected in the morphology of the magnetic adsorbent as confirmed by the XRD pattern. Increases in the pH value from 6 and the adsorption temperature led to a lower adsorption capacity of the samples. The maximum adsorption capacity for the well-dispersed nanoparticles of magnetic (NiCu-MOF@MAC and nonmagnetic (NiCu-MOF@AC) was calculated to be 303.03 and 454.54 mg/g by using linear Langmuir isotherm as an appropriate model, respectively. The achievements from the reusability evaluation illustrated that the magnetic bimetallic MOF nanocomposite could successfully be applied to remove hydroquinone from the wastewater on an industrial scale. The kinetic experimental data was in good agreement with the pseudo-second-order model.
这项工作的目的是通过简便的制备方法在基于核桃的活性炭上合成核壳型磁性和非磁性负载双金属金属有机骨架（MOFs），以研究其在水溶液中对氢醌的性能吸附的可行性。活性炭作为基底，镍、铜和均苯三甲酸被用于制备的 MOFs 的结构中。通过 XRD、FTIR、FESEM、EDX、TEM、BET 和 VSM 分析对吸附剂进行了表征。XRD 图谱证实了磁性吸附剂中存在针铁矿和磁铁矿相。随着 pH 值从 6 增加和吸附温度升高，样品的吸附容量降低。通过使用线性 Langmuir 等温线作为合适的模型，计算出分散良好的磁性（NiCu-MOF@MAC）和非磁性（NiCu-MOF@AC）纳米颗粒的最大吸附容量分别为 303.03 和 454.54 mg/g。从可重复使用性评估的结果表明，磁性双金属 MOF 纳米复合材料可以成功地应用于从工业规模的废水中去除氢醌。动力学实验数据与拟二级模型吻合较好。
