(580e) Performance of a Cost-Effective Micro-Scale Biochar/Psf Mixed Matrix Hollow Fiber Membrane in the Treatment of Methylene Blue Simulated Wastewater

J.Paul, C., National University of Singapore
Jinsong, H., National University of Singapore
Colorful dye containing water has increasingly become an important issue with the increasing public concerns on environmental protection. A micro-scale biochar particles/PSF mixed matrix hollow fiber membrane (MMM) was successfully prepared for the removal of methylene blue from water. The static and dynamic adsorption of methylene blue by MMM was investigated. The results revealed that the MMM exhibited a high removal efficiency of methylene blue under a wide pH range of 4 to 10. The adsorption process on biochar and MMM obeyed the intraparticle surface diffusion model and Langmuir isotherm model. At neutral pH, the maximum adsorption capacity was for 544.459 mg/g for biochar and 165.808 mg/g for MMM, respectively. Regeneration could be achieved by using 1 M NaCl in 90 % ethanol aqueous solution, with the desorption rate above 92 %.Furthermore, the MMM displayed good performance in treating simulated methylene blue wastewater through continuous filtration. More importantly, the MMM showed an excellent reusability for methylene blue removal, achieving81 % of the permeate yield of the fresh MMM after 3 regeneration cycles. Finally, the adsorption mechanism studies indicated that the adsorption of methylene blue was associated with electrostatic interaction, hydrogen bonding as well as hydrophobic interaction.