scholarly journals Partition of the carbonyl compounds between the indoor and outdoor air at residental areas in District 5, Ho Chi Minh City

2016 ◽  
Vol 19 (2) ◽  
pp. 94-106
Author(s):  
Huy Huu Duong ◽  
Thu Huong Minh Dang ◽  
Hien Thi To
Keyword(s):  
Indoor Air ◽  
Carbonyl Compounds ◽  
Indoor Air Pollution ◽  
Ho Chi Minh City ◽  
Anthropogenic Source ◽  
Outdoor Air ◽  
Pollution Levels ◽  
Air Infiltration ◽  
The Mean ◽  
Indoor And Outdoor

Indoor air pollution, especially for the air toxic compounds such as carbonyls, is the most common issue in large cities. Indoor and outdoor air samples were simultaneously collected at six homes to estimate the pollution levels of carbonyl compounds at some points in the residential area, Ho Chi Minh City. The gaseous carbonyls were measured in the period of August and September, 2011 corresponding to the rainy season. The results showed that formaldehyde, acetaldehyde and acetone were the most abundant carbonyls in both indoor and outdoor air, accounted 80 % of the interested compounds, followed by propionaldehyde and benzaldehyde. In the outdoor air, the mean concentrations of formaldehyde, acetaldehyde and acetone were 15.21±6.42, 13.77±7.63, 12.11±11.72 μg.m-3, respectively. Meanwhile, the indoor concentrations were 25.45±19.49, 26.21±13.03 and 22.12±18.08 μg.m-3 for formaldehyde, acetaldehyde and acetone, respectively. Formaldehyde/acetaldehyde and acetaldehyde/ propionaldehyde ratios were 2.23±1.41 and 6.09±5.00, respestively, indicating that main sources of outdoor carbonyls came from the anthropogenic source. The mean carbonyl concentrations of the present study compared with those of other countries showed that indoor carbonyls were similar to other studies, but outdoor carbonyls were much higher. In addition, most of the indoor/outdoor ratios were slightly higher than 1 and levels of benzaldehyde and tolualdehyde were a little high in the indoor air. These results indicated that the indoor carbonyls were strongly affected by the outdoor air infiltration.

Indoor Air Pollution as an Environmental Factor

1976 ◽  
Vol 20 (14) ◽  
pp. 272-276
Author(s):  
Joshi Satish
Keyword(s):  
Air Pollution ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Well Being ◽  
Outdoor Air ◽  
Average Person ◽  
Sampling Program ◽  
The City ◽  
Indoor And Outdoor

An average person spends most of his time indoors and the quality of indoor air affects his performance and well-being. This justifies the study of indoor air pollution for the development of working and living environments which are comfortable and safe. As a part of a larger program to study traffic-generated air pollution in the vicinity of streets, a simultaneous indoor/outdoor sampling program was carried out at three sites in the city of Zurich, Switzerland. Parameters included CO, NO, NO2 and HCHO. The results show the direct relationship between indoor and outdoor concentrations of CO, NO and NO2. HCHO concentrations were found to be substantially higher indoors than ourdoors thus supporting the hypothesis that HCHO source could be in the buildings themselves. The importance of indoor air is emphasized, and the interplay of indoor and outdoor air pollution is demonstrated.

scholarly journals Particulate matter in indoor spaces: known facts and the knowledge gaps

2015 ◽  
Vol 47 (1) ◽  
pp. 43-54 ◽  
Author(s):  
Patrycja Rogula-Kopiec ◽  
Józef S. Pastuszka ◽  
Wioletta Rogula-Kozłowska ◽  
Grzegorz Majewski
Keyword(s):  
Air Pollution ◽  
Particulate Matter ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Outdoor Air ◽  
Knowledge Gaps ◽  
Indoor Space ◽  
The World ◽  
Indoor Spaces ◽  
Indoor And Outdoor

Abstract: Particulate matter in indoor spaces: known facts and the knowledge gaps. As people spend most of the time in closed spaces (flats, workplaces, schools etc.), the indoor air has been researched for many years all over the world. Particulate matter (PM) is one of the most often examined pollutants in the indoor and outdoor air. The following study presents the facts about PM in closed spaces and the most often taken actions. The least known aspects related to the indoor air pollution with PM are demonstrated. The indoor space of various service and office buildings/facilities (not related to production, i.e. offices, shops, beauty parlours, restaurant kitchens, restaurants, pubs etc.) seem to be an unrecognized area in the air pollution studies. Importantly, a great number of people work in such spaces all over the world and thus spend there a large part of their lives.

scholarly journals Simultaneous Liquid Chromatographic Determination of 39 Polycyclic Aromatic Hydrocarbons in Indoor and Outdoor Air and Application to a Survey on Indoor Air Pollution in Fuji, Japan

2002 ◽  
Vol 85 (1) ◽  
pp. 188-202 ◽  
Author(s):  
Takeshi Ohura ◽  
Tomohiko Sugiyama ◽  
Takashi Amagai ◽  
Masahiro Fusaya ◽  
Hidetsuru Matsushita
Keyword(s):  
Air Pollution ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Indoor Air ◽  
Aromatic Hydrocarbons ◽  
Indoor Air Pollution ◽  
Chromatographic Determination ◽  
Outdoor Air ◽  
Polycyclic Aromatic ◽  
Indoor And Outdoor

Abstract An analytical method was established for the simultaneous determination of 39 polycyclic aromatic hydrocarbons (PAHs) in air. The method was applied to a survey of gaseous and particulate PAHs in household indoor air. The survey was performed in 21 houses in the summer of 1999 and in 20 houses in the winter of 1999–2000 in Fuji, Japan. Thirty-eight PAHs were determined in indoor and outdoor air in the summer, and 39 PAHs were determined in indoor and outdoor air in the winter. The concentrations of gaseous PAHs in indoor air tended to be higher than those in outdoor air in the summer and winter. The concentrations of particulate PAHs in indoor air were the same as or lower than those in outdoor air in the summer and winter. PAH profiles, correlations between PAH concentrations, and multiple regression analysis were used to determine the factors affecting the indoor PAH concentrations. These results showed that gaseous PAHs in indoor air were primarily from indoor emission sources, especially during the summer, and that indoor particulate PAH concentrations were significantly influenced by outdoor air pollution.

Indoor Air Pollution Levels Were Halved as a Result of a National Tobacco Ban in a New Zealand Prison

2012 ◽  
Vol 15 (2) ◽  
pp. 343-347 ◽  
Author(s):  
S. Thornley ◽  
K. N. Dirks ◽  
R. Edwards ◽  
A. Woodward ◽  
R. Marshall
Keyword(s):  
Air Pollution ◽  
New Zealand ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Pollution Levels ◽  
Tobacco Ban

Characterization of Bacteria and Fungi Bioaerosol in the Indoor Air of selected Primary Schools in Malaysia

2011 ◽  
Vol 20 (6) ◽  
pp. 607-617 ◽  
Author(s):  
Nor Husna Mat Hussin ◽  
Lye Munn Sann ◽  
Mariana Nor Shamsudin ◽  
Zailina Hashim
Keyword(s):  
Indoor Air ◽  
Primary Schools ◽  
Average Concentration ◽  
Outdoor Air ◽  
Inadequate Ventilation ◽  
Bacillus Spp ◽  
Bacteria And Fungi ◽  
Staphylococcus Spp ◽  
Indoor And Outdoor

This study reports the types and concentrations of bacterial and fungal bioaerosols found in five randomly selected primary schools in Malaysia. Normal flora bacteria was the most frequently isolated bacteria including Staphylococcus spp., Pseudomonas spp. and Bacillus spp. Terribacillus spp. found in this study had never been reported before. The most frequently isolated fungal genera were Aspergillus, Penicillium, Fusarium, Rhizopus and Zygomycetes. The average concentration of bacteria in indoor and outdoor air were 1025 ± 612 CFU/m3 and 1473 ± 1261 CFU/m3, respectively, while the average concentration of fungal bioaerosol in indoor and outdoor air were 292 ± 83 CFU/m3 and 401 ± 235 CFU/m3, respectively. The percentages of bacterial and fungal samples that were within the American Conference of Industrial Hygenists (ACGIH) recommended levels were 44% and 33.8%, respectively. The ratio of indoor to outdoor fungi concentration was below 1.0, suggesting minimal indoor generative source for fungal bioaerosols. However, the ratio of indoor to outdoor bacteria concentration was approaching 1.0, suggesting the presence of potential internal generative source and inadequate ventilation. Building occupants might be one of the potential sources of bacteria in the indoor air as the bacteria concentrations without occupants were significantly lower than with occupants (p < 0.05).

Environmental protection

2013 ◽  
Author(s):  
Julia Smedley ◽  
Finlay Dick ◽  
Steven Sadhra
Keyword(s):  
Air Pollution ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Pesticide Exposure ◽  
Food Contamination ◽  
Occupational Exposures ◽  
Outdoor Air ◽  
Protection Agency ◽  
Outdoor Air Pollution ◽  
Farming Communities

Environmental medicine 710Health Protection Agency 712Outdoor air pollution 714Indoor air pollution 716Water pollution 718Soil pollution 720Food contamination 722• Environmental exposures, while sharing many attributes with occupational exposures, are often more subtle. They are generally of much lesser degree (e.g. pesticide exposure in farming communities, outdoor air pollution) and the effects are not so easily attributable to the exposure...

CHRONIC AIRWAY SYMPTOMS AND LUNG FUNCTION AMONG WOMEN IN A RURAL COMMUNITY IN GUATEMALA WITH HIGH INDOOR AIR POLLUTION LEVELS

Epidemiology ◽  
2004 ◽  
Vol 15 (4) ◽  
pp. S79-S80
Author(s):  
Tone Smith-Sivertsen ◽  
Nigel Bruce ◽  
Anaite Diaz ◽  
Morten Alexander Schei ◽  
Daniel Pope ◽  
...  
Keyword(s):  
Air Pollution ◽  
Lung Function ◽  
Rural Community ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Pollution Levels ◽  
Airway Symptoms ◽  
Chronic Airway

scholarly journals Indoor Air Quality Investigation at Primary Classrooms in Hamirpur, Himachal Pradesh, India

2019 ◽  
Vol 24 ◽  
pp. 45-48 ◽  
Author(s):  
Venu Shree ◽  
Bhanu M. Marwaha ◽  
Pamita Awasthi
Keyword(s):  
Air Quality ◽  
Relative Humidity ◽  
Indoor Air ◽  
Himachal Pradesh ◽  
Building Performance ◽  
Outdoor Air ◽  
Primary Classrooms ◽  
Outdoor Air Quality ◽  
Hybrid Ventilation ◽  
Indoor And Outdoor

Two schools in Hamirpur (Himachal Pradesh, India) having hybrid ventilation (ceiling fan) were selected for indoor and outdoor air quality investigation. Investigated parameters include temperature, relative humidity, CO2, and PM2.5 for both indoor and outdoor air quality. The average concentrations of CO2, and PM2.5 are estimated for indoor and outdoor air quality. Result shows that adopted building performance is not good in comparison with designed ones. The indoor concentrations of various pollutants are found to be higher in comparison with outdoor, so there is an urgent need to reduce the levels of pollutants inside the primary classrooms.

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