2-Methylimidazole-modified Iron Metal-organic Framework as an Efficient Methylene Blue Adsorbent
Yingxin Zhao, Hao Hu, Shengyu Zhang, Shiya Feng, Yun Yang, Xiongjian Li and Shuijin Yang* Author for corresponding; e-mail address: yangshuijin@hbnu.edu.cn
Volume :Vol.49 No.6 (November 2022)
Research Article
DOI: https://doi.org/10.12982/CMJS.2022.104
Received: 30 June 2022, Revised: 20 September 2022, Accepted: 27 September 2022, Published: -
Citation: Zhao Y., Hu H., Zhang S., Feng S., Yang Y., Li X., et al., 2-Methylimidazole-modified Iron Metal-organic Framework as an Efficient Methylene Blue Adsorbent, Chiang Mai Journal of Science, 2022; 49(6): 1576-1593. DOI 10.12982/CMJS.2022.104.
Abstract
Metal organic frameworks have a wide range of applications in the field of environmental remediation. In this study, Fe-BDC/Fe-2MI composites were synthesized by one-pot solvothermal method. By studying the adsorption performance of methylene blue (MB) in wastewater, it was confirmed that Fe-BDC/Fe-2MI has excellent adsorption properties. When the initial molar ratio of FeCl3.6H2O:H2BDC:2-MI is 1:1.5:10, the adsorbent has the best adsorption performance. At the same time, the effects of different pH (2-10), temperature (303-323K) and initial concentration of adsorbate (30-90mg/L) on the adsorption capacity were further explored. It was found that when pH=6.0, T=303K was favorable for Fe-BDC/Fe-2MI to adsorb MB. The adsorption process conformed to the Langmuir isotherm adsorption model, indicating that it was a monolayer adsorption which was a good adsorption process. Thermodynamic parameters show that the adsorption process is a spontaneous exothermic reaction. These results demonstrated that Fe-BDC/Fe-2MI composites possess potential practical application value.