Evaluation of the Bioaerosol Inactivation Ability of Chitosan-Coated Antimicrobial Filters

被引:6
作者
Hsu, Ying-Fang [1 ]
Chuang, Chi-Yu [2 ]
Yang, Shinhao [1 ]
机构
[1] CTBC Business Sch, Ctr Gen Educ, Environm Sustainabil Lab, 600,Sect 3,Taijiang Blvd, Tainan 709, Taiwan
[2] Chang Jung Christian Univ, Dept Occupat Safety & Hlth, 1 Changda Road, Tainan 711, Taiwan
关键词
chitosan-coated filters; survival; bioaerosols; antimicrobial agent; BACILLUS-SUBTILIS; ESCHERICHIA-COLI; BACTERIAL AEROSOLS; ANTIBACTERIAL; EFFICIENCY; CHITINASE; STABILITY; EXPOSURE; GROWTH; TIME;
D O I
10.3390/ijerph18137183
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This work considers the enhancement of indoor bioaerosol removal efficiency by liquid coating of the antimicrobial agent chitosan onto polypropylene fibrous filters (CCFs). Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis) were chosen as the tested bioaerosols. The results revealed that 2.5% (w/w) of CCFs have significantly higher bioaerosol survival capability (23% and 34% of E. coli and B. subtilis, respectively), compared to an untreated filter (65% and 64% for E. coli and B. subtilis, respectively). Increasing face velocity and relative humidity during operating CCFs could reduce the bioaerosol removal capability. The regression analysis of the experimental findings demonstrated that the higher coating concentration of chitosan had the most positive influence on bioaerosol removal, while the face velocity and relative humidity had a negative influence, but a milder effect was observed (R-2 = 0.83 and 0.81 for E. coli and B. subtilis bioaerosols, respectively). A CCF-loaded air-cleaning device was tested in a real indoor environment and resulted in 80.1% bioaerosol removal within 3 h of operating, which suggests that the chitosan-coated filter has the potential for further application in improving indoor air quality in the future.
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页数:11
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