Investigation of Suspended and Settled Particulate Matter in Indoor Air"

This study aims to determine the particulate matter (PM2.5) mass concentrations and the comfort parameters (total bacterial counts (TBC), total fungal counts (TFC), relative humidity and temperature) in a university building. The samplings were carried out in three different indoor areas, including lecture hall, laboratory and lecturer office. PM2.5 samples were collected over a period of 8 h sampling using a low volume sampler (LVS). The anemometer Model Kestrel 0855YEL was used to measure relative humidity and temperature parameters. The sampling of airborne microorganisms was conducted by using microbial sampler at 350 L air sampled volume. The results showed that the highest average of PM2.5 was at lecture hall (88.54 ± 26.21 µgm-3) followed by lecturer office (69.79 ± 19.06 µgm-3) and laboratory (47.92 ± 24.88 µgm-3). The mean of TBC and TFC readings recorded as follow; 32.71 ± 5.91 cfu m-3 and 76.71 ± 21.5 cfu m-3 for laboratory, 112.1 ± 29.06 cfu m-3 and 124.67 ± 23.35 cfu m-3 for lecturer office, 121.74 ± 19.33 cfu m-3 and 115.33 ± 8.08 cfu m-3 for lecture hall. The average of all comfort parameter was within the prescribed standard by Industry Code of Practice on Indoor Air Quality 2010 for all sampling sites. Therefore, all occupants of the building can work in a conducive and comfortable environment. This study is in line with the objectives of National Policy on the Environment (DASN), which focusing on achieving a clean, safe, healthy and productive environment for present and future generations.

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Interrelationship of Indoor particulate matter and Respiratory dust deposition of women in the residence of Dhanbad City, India

10.21203/rs.3.rs-446710/v1 ◽

2021 ◽

Author(s):

SHRAVAN KUMAR ◽

Manish Kumar Jain

Keyword(s):

Particulate Matter ◽

Health Risks ◽

Indoor Air ◽

Air Pollutants ◽

Fine Particles ◽

Dust Deposition ◽

Respiratory Problems ◽

Indoor Particulate Matter ◽

Indoor Air Pollutants ◽

Indoor Conditions

Abstract Women spend relatively more time in indoor conditions in developing countries. Exposure to various indoor air pollutants leads them to higher health risks according to Household air quality in which they reside. Particulate matter (PM) exposure with their exposure duration inside the household plays a significant role in women's Respiratory problems. We measured size segregated particulate matter concentrations in 63 residences at different locations. Respiratory dust depositions (RDDs) for 118 women in their different respiratory regions like head-airway (HD), tracheobronchial (TB), and alveolar (AL) region for the three PM size fractions (PM10, PM2.5 & PM1) were investigated. For different positions like Light exercise and the Sitting condition, RDD values found for AL region was 0.091 µgmin− 1 (SD: 0.067, 0.012–0.408) and 0.028 µgmin− 1 (SD: 0.021, 0.003–0.126) for PM10, 0.325 µgmin− 1 (SD: 0.254, 0.053–1.521) and 0.183 µgmin− 1 (SD: 0.143, 0.031–0.857) for PM2.5, 0.257 µgmin− 1 (SD: 0.197, 0.043–1.04) and 0.057 µgmin− 1 (SD: 0.044, 0.009–0.233) respectively for PM1 to females. RDDs values in the AL region significantly increases as PM10 (11%), PM2.5 (68%), and PM1 (21%), confirm that for women, the AL region is the most prominent affected zone by fine particles (PM2.5).

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Effect of Air Purifier Use in the Classrooms on Indoor Air Quality—Case Study

Atmosphere ◽

10.3390/atmos12121606 ◽

2021 ◽

Vol 12 (12) ◽

pp. 1606

Author(s):

Małgorzata Basińska ◽

Michał Michałkiewicz ◽

Katarzyna Ratajczak

Keyword(s):

Particulate Matter ◽

Air Quality ◽

Indoor Air Quality ◽

Indoor Air ◽

Air Purification ◽

Portable Devices ◽

Microscopic Fungi ◽

Before And After ◽

Air Purifier ◽

High Level

Dissatisfaction with indoor air quality is common even in relatively new or renovated Polish school buildings. To improve air quality in educational buildings, portable devices have seen increased use, for which manufacturers guarantee a high level of indoor air purification. However, their optimized operation largely depends on their correct use. The aim of this article was to determine the effectiveness of air purification in a primary school using an air purification device with an analysis of the classroom indoor air quality (IAQ). Two criteria were used, microbiological and particulate matter concentration. Measurements were made before device installation and during its continuous operation, and before and after lessons on chosen days. Measurements related to IAQ did not detect clear differences in the analyzed measurement periods. For microbiological contamination, in the morning before lessons, the total count for all bacteria and microscopic fungi was definitely lower than after lessons. Comparing the periods before and after device installation, no clear tendency for reducing the bacteria count or microscopic fungi occurred during air purifier operation, nor was there any noticeable trend in the reduction of particulate matter. There was no improvement in air quality in the classrooms during the operation of the purification devices.

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Study on the influence of indoor air particulate matter concentration in university classroom

Proceedings of the 2015 International Conference on Economics, Social Science, Arts, Education and Management Engineering ◽

10.2991/essaeme-15.2015.159 ◽

2015 ◽

Author(s):

Qi Cao

Keyword(s):

Particulate Matter ◽

Indoor Air ◽

Air Particulate Matter ◽

Air Particulate ◽

Particulate Matter Concentration ◽

Matter Concentration

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Indoor air partitioning of Synthetic Musk Compounds: Gas, particulate matter, house dust, and window film

The Science of The Total Environment ◽

10.1016/j.scitotenv.2020.138798 ◽

2020 ◽

Vol 729 ◽

pp. 138798

Author(s):

Esin Balci ◽

Mesut Genisoglu ◽

Sait C. Sofuoglu ◽

Aysun Sofuoglu

Keyword(s):

Particulate Matter ◽

Indoor Air ◽

House Dust ◽

Synthetic Musk ◽

Window Film

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Indoor air pollution and tobacco smoke exposure: impact on nasopharyngeal bacterial carriage in mothers and infants in an African birth cohort study

ERJ Open Research ◽

10.1183/23120541.00052-2018 ◽

2019 ◽

Vol 5 (1) ◽

pp. 00052-2018 ◽

Cited By ~ 6

Author(s):

Aneesa Vanker ◽

Polite M. Nduru ◽

Whitney Barnett ◽

Felix S. Dube ◽

Peter D. Sly ◽

...

Keyword(s):

Air Pollution ◽

Cohort Study ◽

Particulate Matter ◽

Indoor Air ◽

Tobacco Smoke ◽

Indoor Air Pollution ◽

Bacterial Species ◽

Tobacco Smoke Exposure ◽

Nasopharyngeal Carriage ◽

The Impact

Indoor air pollution (IAP) or environmental tobacco smoke (ETS) exposure may influence nasopharyngeal carriage of bacterial species and development of lower respiratory tract infection (LRTI). The aim of this study was to longitudinally investigate the impact of antenatal or postnatal IAP/ETS exposure on nasopharyngeal bacteria in mothers and infants.A South African cohort study followed mother–infant pairs from birth through the first year. Nasopharyngeal swabs were taken at birth, 6 and 12 months for bacterial culture. Multivariable and multivariate Poisson regression investigated associations between nasopharyngeal bacterial species and IAP/ETS. IAP exposures (particulate matter, carbon monoxide, nitrogen dioxide, volatile organic compounds) were measured at home visits. ETS exposure was measured through maternal and infant urine cotinine. Infants received the 13-valent pneumococcal andHaemophilus influenzaeB conjugate vaccines.There were 881 maternal and 2605 infant nasopharyngeal swabs. Antenatal ETS exposure was associated withStreptococcus pneumoniaecarriage in mothers (adjusted risk ratio (aRR) 1.73 (95% CI 1.03–2.92)) while postnatal ETS exposure was associated with carriage in infants (aRR 1.14 (95% CI 1.00–1.30)) Postnatal particulate matter exposure was associated with the nasopharyngeal carriage ofH. influenzae(aRR 1.68 (95% CI 1.10– 2.57)) orMoraxella catarrhalis(aRR 1.42 (95% CI 1.03–1.97)) in infants.Early-life environmental exposures are associated with an increased prevalence of specific nasopharyngeal bacteria during infancy, which may predispose to LRTI.

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