Bio-based antibacterial applicationss for HEPA filters: Implications for indoor air quality and HVAC applications
Atmospheric Pollution Research, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.apr.2026.103057
- Dergi Adı: Atmospheric Pollution Research
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC
- Anahtar Kelimeler: HEPA filter, HVAC, Indoor air quality, Natural extracts
- Bursa Uludağ Üniversitesi Adresli: Evet
Özet
High-efficiency particulate air (HEPA) filters are widely used in ventilation systems to control airborne microorganisms; however, bacterial accumulation on filter surfaces over time may reduce hygienic performance and necessitate frequent replacement. This study investigates a sustainable approach to extending the lifespan of HEPA filters by applying with plant-based extracts derived from Cotinus coggygria and Zingiber officinale. The antibacterial performance of treated HEPA filters was evaluated using Staphylococcus aureus and Escherichia coli aerosols under controlled airflow conditions. The results showed up to 99-100% reduction in Gram-positive bacteria and a reduction in total airborne bacterial colonies, while an additional pressure drop of approximately 27 Pa was observed after the application. Long-term tests indicated that bacterial reduction performance was largely preserved after 11 months of storage under ambient conditions. The findings suggest that a plant-based extract application may improve the hygienic performance and durability of HEPA filters without compromising the operation of the HVAC system. This approach may offer a cost-effective and environmentally friendly strategy for improving indoor air quality in ventilation systems.