Applying the Chlcone Antibacterial Filter for Indoor Bioaerosols Inactivating

This work considers the effects of using the flavonoids-chlcone pretreated filters (CPFs) as the antiseptic filters on the bioaerosol penetration. Two concentrations of chlcone solutions were used to coat on the filter. The Escherichia coli (E. coli), and Bacillus subtilis (B. subtilis) bioaerosols were generated using a collison nebulizer, as the challenged bioaerosols. The results show that culturable survival of E. coli bioaerosols through the untreated filter, the 0.01 wt% and 0.02wt% CPFs are around 78%, 66% and 55%, respectively. The results reveal that the culturable survival of B. subtilis bioaerosols through the untreated filter, 0.01 wt% and 0.02 wt% CPFs are approximately 80%, 72% and 67%. It suggested that the chalcone pretreatment did have an antiseptic effect on bacteria bioaerosols. The results showed that a higher concentration CPF corresponds to a lower bioaerosol survival. It also indicated that the chalcone could inactivate the bacteria when they were captured on the pretreated filters' surface. Moreover, the chalcone pretreated filters have a higher antiseptic on the E. coli bioaerosol than on the B. subtilis bioaerosol after those bioaerosols were captured.