In recent years, the rise in air pollution an‎d the presence of fine particulate matter (PM2.5 an‎d PM10) have become critical public health concerns. Nonwoven polymer filters, due to their lightweight, flexibility, an‎d mass-production potential, have garnered significant attention as filtration media. However, their limited efficiency in removing fine particles presents a major challenge for their widespread application. In this study, to improve filtration efficiency, ZIF-8 nanoparticles were synthesized onto a polyester nonwoven substrate. The modified substrate was characterized using FTIR, XRD, FESEM, an‎d nitrogen adsorption/desorption tests. FTIR an‎d XRD results confirmed the presence of characteristic peaks an‎d the crystalline structure of ZIF-8 in the modified substrate. Additionally, nitrogen adsorption/desorption tests, based on BET theory, showed a significant increase in the specific surface area of the modified substrate. Filtration performance, according to the EN 779 stan‎dard, indicated a substantial improvement in particle removal efficiency in the range of 2.5 to 10 micrometers, with the efficiency for 10-micron particles reaching over 88%. Moreover, filtration efficiency in the 0.3 to 2.5 micrometers range also improved, achieving an acceptable level. The modified substrate exhibited an average filtration efficiency of 70.8% an‎d a pressure dro‎p of 73.8 Pascals, reflecting an optimal balance between filtration performance an‎d airflow resistance. This research demonstrates that the incorporation of ZIF-8 nanoparticles offers a sustainable an‎d cost-effective approach for the development of advanced filters. The findings pivotal the way for potential industrial applications an‎d improved air quality in urban an‎d industrial environments. Ultimately, this study provides a basis for future research into designing high-performance filters with controlled pressure dro‎p an‎d superior filtration efficiency.

حسين فشندي

محسن سليماني امين آبادي

صديقه برهاني , فرزانه علي حسيني