Anbari Alireza Pourvahabi, Delcheh Shima Rahmdel, Kashif Muhammad, Ranjbari Alireza, Karbalaei Akbari Mohammad, Zhuiykov Serge, Heynderickx Philippe M, Verpoort Francis
Center for Green Chemistry and Environmental Biotechnology, Ghent University Global Campus, Incheon 406-840, Republic of Korea.
Department of Chemistry, Faculty of Science, Ghent University, 9000 Gent, Belgium.
Nanomaterials (Basel). 2025 Jul 15;15(14):1097. doi: 10.3390/nano15141097.
Given the adverse effects of organic dyes from aqueous solutions on human physiology and the ecological system, establishing an effective system for their elimination is imperative. This study employs the in situ thermal (IST) method to synthesize nanocomposites comprising zeolitic imidazole frameworks, specifically Fe-ZIF-8 and Fe-ZIF-67. The investigation offers a comprehensive evaluation of the properties of these nano-adsorbents for the removal of malachite green (MG). The results indicate a significantly increased adsorption capacity of up to 495 and 552 mg g for Fe-ZIF-8 and Fe-ZIF-67, respectively. Furthermore, they demonstrate removal efficiencies of up to 90% and 95% for MG, respectively. Parameters associated with the adsorption process are derived from isotherms and removal kinetics, specifically the Freundlich model and the pseudo-second-order kinetics model, respectively. The enhanced adsorption capacity observed in Fe-ZIF-8 and Fe-ZIF-67 can be attributed to π-π stacking interactions, hydrogen bonding, and electrostatic attraction. After undergoing three cycles, both adsorbents consistently exhibit a high removal efficiency of approximately 85%, indicating notable structural integrity and outstanding potential for repeated use. The examined adsorbents display exceptional efficacy, favorable stability, and substantial specific surface area, underscoring their remarkable adsorption capabilities. The nanocomposites comprising Fe-ZIF-8 and Fe-ZIF-67 demonstrate considerable potential as highly favorable options for the elimination of MG and other cationic organic dyes from aqueous environments.
鉴于水溶液中的有机染料对人体生理和生态系统的不利影响，建立一个有效的去除体系势在必行。本研究采用原位热（IST）法合成了包含沸石咪唑框架的纳米复合材料，特别是Fe-ZIF-8和Fe-ZIF-67。该研究全面评估了这些纳米吸附剂对孔雀石绿（MG）的去除性能。结果表明，Fe-ZIF-8和Fe-ZIF-67的吸附容量显著提高，分别高达495和552 mg/g。此外，它们对MG的去除效率分别高达90%和95%。与吸附过程相关的参数分别来自等温线和去除动力学，具体而言分别是Freundlich模型和伪二级动力学模型。在Fe-ZIF-8和Fe-ZIF-67中观察到的增强吸附容量可归因于π-π堆积相互作用、氢键和静电吸引。经过三个循环后，两种吸附剂始终表现出约85%的高去除效率，表明其具有显著的结构完整性和出色的重复使用潜力。所研究的吸附剂表现出卓越的功效、良好的稳定性和较大的比表面积，突出了它们卓越的吸附能力。包含Fe-ZIF-8和Fe-ZIF-67的纳米复合材料显示出作为从水环境中去除MG和其他阳离子有机染料的非常有利选择的巨大潜力。
