Assessment of Airborne Particles in Indoor Environments: Applicability of Particle Counting for Prediction of Bioaerosol Concentrations

Mirhoseini, Seyed Hamed; Nikaeen, Mahnaz; Satoh, Kazuo; Makimura, Koichi

doi:10.4209/aaqr.2015.08.0528

Cited by 56 publications

(44 citation statements)

References 31 publications

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“…Table 4 summarize the comparison of the present average bacterial aerosols concentration with other studies. The average concentration of bacterial aerosols (956 cfu/m 3 ) exceeds the value reported by WHO [16] (500 cfu/m 3 ) and other studies by Lee et al [17] and Mirhoseini et al [18]. While the present results are lower than studies of Mentes et al [19] and Pegas et al [20].…”

Section: Resultscontrasting

confidence: 57%

Concentration and size distribution of biological particles in school classrooms

Mostafa

2017

JAP

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I S S N 2 3 4 7 -3487 V o l u m e 1 3 N u m b e r 8 J o u r n a l o f A d v a n c e P h y s i c s 5085 | P a g e S e p t e m b e r 2 0 1 7 w w w . c i r w o r l d . c o m Concentration and size distribution of biological particles in school classrooms Mona MoustafaPhysics department, Faculty of Science, Minia University (Egypt) Mona_moustafa9@yahoo.com ABSTRACTFungal and bacterial aerosol particles concentrations are measured in a school classrooms at two different floors using the 6-stage Andersen impactor as a bioaersol sampler. The average bacterial concentration is higher than the average fungal concentration. The concentrations were 957 and 955 cfu/m 3 for bacterial particles at first and second floors, respectively while the fungal particles concentrations were 146 and 235 cfu/m 3 at first and second floors, respectively. Most of the biological particles were concentrated at the size range of respirable particles (< 5 µm ) that can penetrate into the alveoli and may cause lung diseases. The human activity is a main factor for the production of microbiological particles. Environmental factors play also a role on the fungal growth. Bacterial concentration is almost twice the guide value of WHO while the fungal concentration is underestimation.

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Section: Resultscontrasting

confidence: 57%

Concentration and size distribution of biological particles in school classrooms

Mostafa

2017

JAP

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“…Environmental health studies have indicated that constant exposure to bioaerosols containing high concentrations of bacteria can lead to respiratory diseases including allergies, infections, and other adverse health effect (Bünger et al, 2007;Lu et al, 2016;Mirhoseini et al, 2016). With the current increases in atmospheric pollution, human respiratory systems have been suffering from more health risks both indoors and outdoors when exposed to biological aerosols.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characteristic of Antibacterial Facemasks with Chinese Herbal Microcapsules

Wang

Kang

You

et al. 2017

Aerosol Air Qual. Res.

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Along with the current increases in human activities, air pollution, especially that generated from bioaerosols, has begun to receive more extensive attention. Among the bioaerosols, bacteria and fungi can result in organisms that are pathogenic to animals and humans. Therefore, a biological protective respirator with an antibacterial function would be a significant method by which to prevent epidemic spread of respiratory infectious diseases and protect human health. In this study, a type of facemask with an antibacterial function was prepared. The structure of the respirator included a respirator body and an inner filter layer that was assembled with herbal microcapsules. A kind of Chinese herb microcapsule developed through a cross-linking reaction method was successfully prepared to serve as an important component of the respirator. Scutellaria baicalensis (SB), a typical Chinese medicine, was employed to prepare the Chinese herb microcapsule. Three kinds of filter cloth (cotton, polyester fiber, and non-woven fabric, respectively) were employed to assemble with Chinese herb microcapsule. Meanwhile, the antibacterial performance and adhesion of the Chinese herb microcapsule for E. coli and S. aureus were investigated. The measurement results revealed that (i) the antibacterial efficiency of the Chinese herb microcapsule and the respirator filter was above approximately 99.999 and 96.000%, respectively; (ii) the adhesion of the herb microcapsules was still excellent after the filter was washed 100 times; (iii) the as-prepared antibacterial filter modified by an O 2 plasma-surface (PSM-O 2 ) treatment exhibited excellent antibacterial performance. Finally, a chamber simulation utilizing an Anderson first order sampler was designed to simulate the effect of wearing the antibacterial filter in a real environment. Overall, the respirator exhibited excellent biological protection properties compared with general masks, which will satisfy a vast number of application prospects.

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“…Exposure to indoor air contaminants is a vital health risk for urban populations because they generally spend more than 80% of time indoors (Mirhoseini et al, 2016). However, with rapid urbanization, people living in countryside tend to migrate to the cities for better work opportunities and livings.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Height on the Accumulation of n-Alkanes and Polycyclic Aromatic Hydrocarbons (PAHs) in Air-Conditioning Filter Dust from High-Rise Apartments

Wang

Qian

Liu

et al. 2017

Aerosol Air Qual. Res.

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To assess the effect of floor levels of high-rise apartment buildings on the accumulation of contaminants in indoor environment, residential air-conditioner filter dust (ACFD) samples from the 1 st , 10 th , 20 th and 30 th floors of a high-rise apartment building were collected for the determination of n-alkanes and polycyclic aromatic hydrocarbons (PAHs). The results show that both n-alkanes and PAHs in the residential ACFD were ubiquitous but varied greatly in concentrations. The total concentrations of 27 n-alkanes (Σ 27 AK) and 16 PAHs (Σ 16 PAH) ranged from 1.35 to 9290 µg g -1 and 278-34200 ng g -1 , respectively. Source apportionment revealed that n-alkanes were from mixed sources combining fossil fuel combustion, natural emission and solid biomass burning, but PAHs were mainly from indoor sources. Furthermore, the diagnostic ratio of paired low weight molecular PAH species may change during transportation and accumulation. Significantly higher concentrations of Σ 27 AK and Σ 16 PAH were observed in the samples from low floor levels (the 1 st and 10 th floors) compared to those from high floor levels (the 20 th and 30 th floors). The results of classification and regression tree analysis clearly suggested floor level is the most important factor influencing the accumulation of Σ 27 AK and Σ 16 PAH in the ACFD. Our findings imply that people living on lower floor levels have greater exposure risks to PAHs associated with indoor dust.

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Assessment of Airborne Particles in Indoor Environments: Applicability of Particle Counting for Prediction of Bioaerosol Concentrations

Cited by 56 publications

References 31 publications

Concentration and size distribution of biological particles in school classrooms

Concentration and size distribution of biological particles in school classrooms

Preparation and Characteristic of Antibacterial Facemasks with Chinese Herbal Microcapsules

The Effects of Height on the Accumulation of n-Alkanes and Polycyclic Aromatic Hydrocarbons (PAHs) in Air-Conditioning Filter Dust from High-Rise Apartments

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