Laboratory of Organic Synthesis, Extraction and Valorization, Faculty of Sciences Ain Chock, Hassan II University, Casablanca 20000, Morocco.
Laboratory of applied Chemistry and Environment (LCAE), Faculty of Sciences, Mohamed Premier University, Oujda 60000, Morocco.
Molecules. 2022 Aug 13;27(16):5168. doi: 10.3390/molecules27165168.
In this study, we will present an efficient and selective adsorbent for the removal of Cu(II) ions from aqueous solutions. The silica-based adsorbent is functionalized by 2-phenylimidazo[1,2-a] pyridine-3-carbaldehyde (SiN-imd-py) and the characterization was carried out by applying various techniques including FT-IR, SEM, TGA and elemental analysis. The SiN-imd-py adsorbent shows a good selectivity and high adsorption capacity towards Cu(II) and reached 100 mg/g at pH = 6 and T = 25 °C. This adsorption capacity is important compared to other similar adsorbents which are currently published. The adsorption mechanism, thermodynamics, reusability and the effect of different experimental conditions, such as contact time, pH and temperature, on the adsorption process, were also investigated. In addition, a theoretical study was carried out to understand the adsorption mechanism and the active sites of the adsorbent, as well as the stability of the complex formed and the nature of the bonds.
在这项研究中，我们将介绍一种从水溶液中去除 Cu(II)离子的高效、选择性吸附剂。基于二氧化硅的吸附剂通过 2-苯基咪唑并[1,2-a]吡啶-3-甲醛（SiN-imd-py）进行功能化，并通过应用各种技术（包括 FT-IR、SEM、TGA 和元素分析）进行了表征。SiN-imd-py 吸附剂对 Cu(II)表现出良好的选择性和高吸附容量，在 pH = 6 和 T = 25°C 时达到 100 mg/g。与目前已发表的其他类似吸附剂相比，这一吸附容量非常重要。此外，还研究了吸附机制、热力学、可重复使用性以及接触时间、pH 和温度等不同实验条件对吸附过程的影响。此外，还进行了理论研究，以了解吸附剂的吸附机制和活性位点，以及形成的配合物的稳定性和键的性质。
