(2011) Designing of bioaerosol production system for removing Escherichia coli from contaminated air using bone char. Journal of Military Medicine. pp. 89-95. ISSN 17351537 (ISSN)
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Abstract
Aims: Bacterial agents are among the most important sources of infection transmission in hospital wards. Thereby, designing of a bio-aerosol convertor for investigation of biological agents in air is necessary. The aim of this study was designing of a suitable system for bio-aerosol production and elimination of Escherichia coli from contaminated air using bone char. Methods. This applied research was performed during 8 months. Bone char was prepared by electrical furnace. Bone char was crushed and pulverized with a range of 20- 60 mesh. The absorptive characteristics of Bone char was determined using X-ray diffraction technique. The pHzpc and specific surface area were determined via titration and N2 gas adsorption according to BET absorption isotherm method. The bacterial aerosol with concentrations of 103-107 CFU per ml of airflow were prepared by a nebulizer and injected to the system. 7th version of RSM software was used for data analysis. Results: E. coli removal efficiency had a linear correlation with adsorbent weight as 103 CFU/ml initial bacterial concentrations and with 4, 7 and 10 g adsorbent mass reached to 30, 20 and 15 CFU/ml, respectively. In addition, the adsorbent pore size in the range of 20-40 mesh was more efficient in bacterial removing in comparison with mesh particles >40. Efficiency of the contaminant air purification achieved 99.99 with the 20-40 mesh adsorbent at 30 minutes. Conclusion: The designed system for production of bio-aerosol has good performance in the study of Escherichia coli removal from contaminated air using bone char.
Item Type: | Article |
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Keywords: | Bio-aerosol Bone char Escherichia coli Microbial Air Pollution |
Divisions: | |
Page Range: | pp. 89-95 |
Journal or Publication Title: | Journal of Military Medicine |
Journal Index: | Scopus |
Volume: | 13 |
Number: | 2 |
ISSN: | 17351537 (ISSN) |
Depositing User: | مهندس مهدی شریفی |
URI: | http://eprints.bmsu.ac.ir/id/eprint/1295 |
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