Laboratory of Applied Chemistry and Environment (LCAE), Department of Chemistry, Faculty of Sciences, University Mohamed Premier, Oujda 60000, Morocco.
QOPNA & LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
Molecules. 2019 Feb 14;24(4):669. doi: 10.3390/molecules24040669.
Porphyrins show great promise for future purification demands. This is largely due to their unique features as host binding molecules that can be modified at the synthetic level, and largely improved by their incorporation into inorganic based materials. In this study, we assessed the efficacy of a hybrid material obtained from the immobilization of 5,10,15,20-tetrakis(pentafluorophenyl)-porphyrin on silica surface to remove Pb(II), Cu(II), Cd(II), and Zn(II) ions from water. The new organic-inorganic hybrid adsorbent was fully characterized by adequate techniques and the results show that the hybrid exhibits good chemical and thermal stability. From batch assays, it was evaluated how the efficacy of the hybrid was affected by the pH, contact time, initial metal concentration, and temperature. The adsorption kinetic and isotherms showed to fit the recent developed fractal-like pseudo-second-order model and Langmuir⁻Freundlich model respectively. The highest adsorption capacities for Pb(II), Cu(II), Cd(II), and Zn(II) ions were 187.36, 125.17, 82.45, and 56.23 mg g, respectively, at pH 6.0 and 25 °C. This study also shows that metal cations from real river water samples can be efficient removed in the presence of the new adsorbent material.
卟啉在未来的净化需求中显示出巨大的潜力。这在很大程度上是由于它们作为主体结合分子的独特特性，可以在合成水平上进行修饰，并通过将其纳入无机材料而得到很大的改善。在这项研究中，我们评估了将 5,10,15,20-四（五氟苯基）卟啉固定在硅胶表面上获得的杂化材料从水中去除 Pb(II)、Cu(II)、Cd(II) 和 Zn(II)离子的效果。新的有机-无机杂化吸附剂通过适当的技术进行了充分的表征，结果表明该杂化材料具有良好的化学和热稳定性。通过批量实验评估了杂化材料的效率如何受到 pH 值、接触时间、初始金属浓度和温度的影响。吸附动力学和等温线表明，它们分别符合最近开发的分形似伪二阶模型和 Langmuir-Freundlich 模型。在 pH 值为 6.0 和 25°C 时，Pb(II)、Cu(II)、Cd(II)和 Zn(II)离子的最大吸附容量分别为 187.36、125.17、82.45 和 56.23 mg g。该研究还表明，在新型吸附剂材料的存在下，可以有效地去除来自实际河水样本中的金属阳离子。
