Organic dyes that have been used in many industries contain chromophore (azo group, aromatic rings) which is hard to degrade. Therefore, wastewater containing organic dyes poses a serious threat to aquatic ecosystems and human health. Various techniques have been developed to remove organic coloring agents to alleviate the increasing concern of non-degradable organic dyes. Adsorption using membranes is considered the most economical and efficient method to control water pollution from dyes. In this research, to further enhance the adsorption capacity of organic dyes on the membrane, a new strategy was developed involving in-situ blending of ZIF-8/gypsum during the dope solution preparation and membrane printing processes. Gypsum, also combined with the polymer matrix of the membrane to create a hierarchical membrane with large adsorption capacity and separation of dyes. Based on the experiment that has been carried out, it is found that the water absorption rate and membrane porosity tended to increase as the difference measured between dry and wet weight of membrane after soaking gets bigger and higher amount of gypsum added leads to higher flux in tested membrane. A specific membrane composition, denoted as M4, demonstrates optimal performance with a blend of PVDF (polyvinylidene fluoride) at 11%, ZIF-8 (Zeolitic Imidazolate Framework-8) at 0.3%, and gypsum at 7%. This formulation results in a permeability of 58.8 L/m2.h.bar and a rejection rate of 34.21%. These outcomes align well with the observed trends in membrane porosity and surface hydrophilicity which incorporating ZIF-8 membrane exhibit antifouling properties, demonstrating effective resistance to fouling on the membrane surface. Eventually, these developed membranes show promise for extending the use of MOF-related materials and applications in the treatment of dye-containing wastewater, contributing to the production of cleaner water.
Rohani, R., Yusoff, I. I., Zaman, K. N., Ali, M. A., Rusli, N. A. B., Tajau, R., & Basiron, S. A. (2021). Ammonia removal from raw water by using adsorptive membrane filtration process. Separation and Purification Technology, 270(4), 118757.
Su, M., Bai, Y. X., Han, J., Chen, J. X., & Sun, H. (2018). Adhesion of gypsum crystals to polymer membranes: Mechanisms and prediction. Journal of Membrane Science, 566, 104–111.
Wang, D., Zhang, D., Li, P., Yang, Z., Mi, Q., & Yu, L. (2021). Electrospinning of Flexible Poly(vinyl alcohol)/MsXene Nanofiber-Based Humidity Sensor Self-Powered by Monolayer Molybdenum Diselenide Piezoelectric Nanogenerator. Nano-Micro Letters, 13(1).
Zhang, H. L., & Zhao, X. (2023). Enhanced Anti-Wetting Methods of Hydrophobic Membrane for Membrane Distillation. Advanced Science Journal, 10(23).
(Salsabila et al., 2024)
Salsabila, A. P., Nazhiifah, F. A., Salsabila, K. L., Amanda, D. A., Sahfa, M. S., & Susanto, H. (2024). Fabrication of Tight-Ultrafiltration Membrane by Combining Zif-8/Gypsum Additives to Enhance Removal of Organic Dye Substances. International Journal of Academic Research in Progressive Education and Development, 13(1), 1424–1432.
Copyright: © 2024 The Author(s)
Published by HRMARS (www.hrmars.com)
This article is published under the Creative Commons Attribution (CC BY 4.0) license. Anyone may reproduce, distribute, translate and create derivative works of this article (for both commercial and non-commercial purposes), subject to full attribution to the original publication and authors. The full terms of this license may be seen at: http://creativecommons.org/licences/by/4.0/legalcode
