Abstract:
With the dawn of nanotechnology, surface modification by incorporating nanomaterials is considered as an auspicious way to improve the membrane performance. The objective of current study was to immobilize silver doped TiO2 (Ag-TiO2) nanoparticles on the surface of commercial nanofiltration (NF) membrane for effective photodegradation and antibacterial activity. For this purpose, an energy saving commercial polyamide NF membrane was modified through successive surface treatment with glutaraldehyde solution followed by polyvinyl alcohol (PVA), TiO2 nanoparticles and silver doped titania (Ag-TiO2) nanoparticles. Modified membranes were characterized by ATR-FTIR spectroscopy, SEM, AFM, XPS and contact angle analyzer. Static leaching experiments were conducted to examine the stability of TiO2 and Ag-TiO2 on the surface of modified membranes. After modification, surface hydrophilicity as well as NaCl rejection improved significantly. However, the decline in water flux was the upshot of inevitable accumulation of nanoparticles in the pores of modified membrane. Additionally, the antifouling property was also evaluated by colony counting method. The bacterial count was reduced by 93% and 91% for E.coli and B.subtilis, respectively, for 0.5% Ag-TiO2 loading. We believe that the current work offers new insights in the modification of low cost, large scale multifunctional nanofiltration membranes for application in textile wastewater treatment.
Page(s):
0-0
DOI:
DOI not available
Published:
Journal: First International Conference on Revamped Scientific Outlook of 21st Century (Abstract Book), Volume: 0, Issue: 0, Year: 2022
Keywords:
Nanoparticles
,
Water purification
,
Nanofiltration membrane
,
polyamide