scholarly journals Evaluation on Indoor Air Quality by Statistical Analysis of Indoor Air Pollutants Concentration in a Seoul Metropolitan Underground Railway Station

2014 ◽  
Vol 30 (3) ◽  
pp. 233-244 ◽  
Author(s):  
Bongbeen Yim ◽  
Kyusung Lee ◽  
Jooin Kim ◽  
Hyunsu Hong ◽  
Jangwon Kim ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Pollutants ◽  
Railway Station ◽  
Underground Railway ◽  
Indoor Air Pollutants

scholarly journals Indoor Air Quality and Human Health Risk Assessment in the Open-Air Classroom

2021 ◽  
Vol 13 (15) ◽  
pp. 8302
Author(s):  
Jenjira Kaewrat ◽  
Rungruang Janta ◽  
Surasak Sichum ◽  
Thongchai Kanabkaew
Keyword(s):  
Risk Assessment ◽  
Air Quality ◽  
Health Risk ◽  
Indoor Air Quality ◽  
Human Health ◽  
Indoor Air ◽  
Air Pollutants ◽  
Indoor Air Pollutants ◽  
Indoor Pm2.5 ◽  
Indoor And Outdoor

Indoor air quality is associated with academic performance and harmful health effects on students and teachers who participate in the classroom. Outdoor sources always contribute to classroom air quality. This study aims to estimate the amounts of indoor and outdoor pollutants and the influence of outdoor sources on open-air classrooms in a school located in the city. A health risk assessment was applied to assess the non-carcinogenic risk to students and teachers from exposure to the pollutants in the classroom. The concentrations of indoor NO2 ranged between 46.40 and 77.83 µg/m3, which is about 0.8 times that of outdoor NO2. A strong correlation and a high indoor/outdoor (I/O) ratio (>0.5) without a source, indicated that indoor NO2 is significantly influenced by outdoor sources. The range of indoor PM2.5 concentrations was 1.66 to 31.52 µg/m3 which was influenced by meteorological conditions. The indoor PM2.5 concentrations were affected by both indoor and outdoor sources. Although the level of indoor air pollutants met the official standard, the young children were exposed to indoor air pollutants which were above the recommended limits to human health with regard to the hazard index (HI) of 1.12. Instant measures such as regularly cleaning the classrooms, zoning the students, and installation of solid and vegetation barriers are recommended to reduce the daily dose of pollutants affecting students in open-air classrooms.

Reducing Asthma Triggers in Schools: Recommendations for Effective Policies, Regulations, and Legislation

2006 ◽  
Vol 16 (1) ◽  
pp. 87-105 ◽  
Author(s):  
Joan N. Parker ◽  
Mary Lee Dunn
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Causal Relationship ◽  
Indoor Air ◽  
Air Pollutants ◽  
Environmental Pollutants ◽  
Asthma Prevalence ◽  
School Building ◽  
Indoor Pollutants ◽  
Indoor Air Pollutants

While 31 million Americans have been diagnosed with asthma, children are most severely affected. Asthma also is common among teachers, indicating that the school building environment may be associated with asthma prevalence among occupants. Children are sensitive to environmental pollutants, which are more concentrated in indoor air environments. Schools are a significant source of indoor air pollutants. Yet little research has addressed the causal relationship between asthma and specific levels of indoor pollutants. Indoor air quality is seldom controlled in schools in a way that minimizes such exposures. While few laws limit indoor air pollutants in schools, some laws outline or mandate practices that can control exposures. This report presents recommendations for laws and regulations that control and, ideally, prevent indoor air quality problems and aims to reduce or mitigate such disease.

scholarly journals INDOOR AIR QUALITY AT HIGHER INSTITUTION’S LABORATORY: A STUDY ON PRE-SYMPTOMS, AWARENESS AND UNDERSTANDING AMONG OCCUPANTS

2015 ◽  
Vol 77 (1) ◽  
Author(s):  
Mohamad Romizan Osman ◽  
Azman Azid ◽  
Hafizan Juahir ◽  
Kamaruzzaman Yunus ◽  
Mohammad Azizi Amran ◽  
...  
Keyword(s):  
Air Quality ◽  
Discriminant Analysis ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Health Problem ◽  
Air Pollutants ◽  
Personality Tests ◽  
Higher Institution ◽  
Indoor Air Pollutants ◽  
The Impact

This study intends to show the effectiveness of indoor air quality (IAQ) at the higher institution laboratory. The objective is to determine the impact of current IAQ, to study the occupants’ knowledge in the indoor air pollutants and to identify the significance of occupants’ personality regarding the IAQ awareness. 100 respondents had responded to answer the questionnaires given. The questionnaires were analysed using XLSTAT2014 software for descriptive statistic and discriminant analysis in order to fulfil the outlined objectives. The finding shows that 56% of the respondents know about IAQ, while 40% and 4% did not know and not sure about the IAQ, respectively. By gender, there were 20 of male respondents having the IAQ knowledge and 21 of male respondents did not know about the IAQ. Meanwhile, 36 of female respondents have IAQ knowledge, 19 of female respondents did not know the IAQ knowledge and 4 of female respondents were not sure regarding the IAQ knowledge. Furthermore, the IAQ in the laboratory at the higher institution is considered as unhealthy based on the respondents’ complaints of their health problem symptoms. Meanwhile, the results of personality tests show that women have more IAQ awareness compared to men. It indicated that the personalities of the occupants have significance to influence and able to determine their awareness on the IAQ. Hence, it described that IAQ is a significant factor to determine and influence the health of laboratory occupants.

The Development of Wool-Based Passive Filters Toimprove Indoor Air Quality

2015 ◽  
Vol 671 ◽  
pp. 219-224 ◽  
Author(s):  
Steve J. McNeil ◽  
Larissa I. Zaitseva
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Pollutants ◽  
High Surface ◽  
Surface Areas ◽  
Passive Filters ◽  
Forced Air ◽  
Materials Used ◽  
Indoor Air Pollutants

It is well known that wool carpets and upholstery permanently remove many gaseous pollutants from the air, thus improving indoor air quality, and peoples’ wellbeing. The aim of the work reported here was to develop wool-based filters that could be used in homes and offices to improve indoor air quality. The abilities of wool, jute, and some other materials used in building interiors, to absorb common indoor air pollutants, formaldehyde, sulphur dioxide and nitrogen oxides were compared. Testing was conducted in a chamber that reproduced the conditions found in a typical room. Wool and jute were found to give high levels of absorption and the results were used to design six types of wool-based filters that were intended to be compact, with high rates and capacities of absorption. The filters were passive, relying on high surface areas and diffusion, rather than forced air circulation, thus minimising their net environmental impact. Filters based on wool yarn, roving, balls and unbacked carpet, were all very effective, absorbing between 94 and 96% of the air pollutants over six hours. This study has shown that wool-based passive filters can significantly improve indoor air quality, and represent a new use for wool.

scholarly journals Current State of Indoor Air Phytoremediation Using Potted Plants and Green Walls

Atmosphere ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 473
Author(s):  
Samaneh Bandehali ◽  
Taghi Miri ◽  
Helen Onyeaka ◽  
Prashant Kumar
Keyword(s):  
Air Pollution ◽  
Particulate Matter ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Human Health ◽  
Indoor Air ◽  
Air Pollutants ◽  
Potted Plants ◽  
Green Walls ◽  
Indoor Air Pollutants

Urban civilization has a high impact on the environment and human health. The pollution level of indoor air can be 2–5 times higher than the outdoor air pollution, and sometimes it reaches up to 100 times or more in natural/mechanical ventilated buildings. Even though people spend about 90% of their time indoors, the importance of indoor air quality is less noticed. Indoor air pollution can be treated with techniques such as chemical purification, ventilation, isolation, and removing pollutions by plants (phytoremediation). Among these techniques, phytoremediation is not given proper attention and, therefore, is the focus of our review paper. Phytoremediation is an affordable and more environmentally friendly means to purify polluted indoor air. Furthermore, studies show that indoor plants can be used to regulate building temperature, decrease noise levels, and alleviate social stress. Sources of indoor air pollutants and their impact on human health are briefly discussed in this paper. The available literature on phytoremediation, including experimental works for removing volatile organic compound (VOC) and particulate matter from the indoor air and associated challenges and opportunities, are reviewed. Phytoremediation of indoor air depends on the physical properties of plants such as interfacial areas, the moisture content, and the type (hydrophobicity) as well as pollutant characteristics such as the size of particulate matter (PM). A comprehensive summary of plant species that can remove pollutants such as VOCs and PM is provided. Sources of indoor air pollutants, as well as their impact on human health, are described. Phytoremediation and its mechanism of cleaning indoor air are discussed. The potential role of green walls and potted-plants for improving indoor air quality is examined. A list of plant species suitable for indoor air phytoremediation is proposed. This review will help in making informed decisions about integrating plants into the interior building design.

Perceived indoor air quality and its relationship to air pollutants in French dwellings

Indoor Air ◽  
2017 ◽  
Vol 27 (6) ◽  
pp. 1168-1176 ◽  
Author(s):  
S. Langer ◽  
O. Ramalho ◽  
E. Le Ponner ◽  
M. Derbez ◽  
S. Kirchner ◽  
...  
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Pollutants

scholarly journals Experimental Investigation of Air Quality in a Subway Station with Fully Enclosed Platform Screen Doors

2020 ◽  
Vol 17 (14) ◽  
pp. 5213
Author(s):  
Liping Pang ◽  
Chenyuan Yang ◽  
Xiaodong Cao ◽  
Qing Tian ◽  
Bo Li
Keyword(s):  
Air Quality ◽  
Indoor Air ◽  
Air Pollutants ◽  
Subway Station ◽  
Passenger Flow ◽  
Volatile Organic ◽  
Maximum Allowable Concentrations ◽  
Indoor Air Pollutants ◽  
Beijing China ◽  
Concentration Limits

In this study, the indoor air quality (IAQ) was investigated in a subway station with fully enclosed platform screen doors in Beijing, China. Eight indoor air pollutants, including PM2.5, PM10, SO2 (sulfur dioxide), NO2 (nitrogen dioxide), NH3 (ammonia), CO (carbon monoxide), CH2O (formaldehyde) and TVOC (total volatile organic compound), were measured for six consecutive days in October 2019. The results indicated that the IAQ in the subway station was basically stable at good levels for most times during the whole measurement period. All eight indoor air pollutants were far below their corresponding maximum allowable concentrations, except for the PM2.5 concentrations, which occasionally exceeded the concentration limits. The concentrations of indoor air pollutants in the subway station were basically within the corresponding standards. The correlation analyses showed that outdoor air pollutants have important influences on indoor air pollutants. The concentrations of PM10, PM2.5, SO2, NO2 and CO in the subway station were positively correlated with their corresponding outdoor concentrations. PM10 was statistically significantly correlated with the passenger flow and train frequency, but the other air pollutants were less impacted by the passenger flow and train frequency.

Assessing Future Trends in Indoor Air Quality

1990 ◽  
Vol 6 (5) ◽  
pp. 103-115 ◽  
Author(s):  
H. J. Van De Wiel ◽  
E. Lebret ◽  
W. K. Van Der Lingen ◽  
H. C. Eerens ◽  
L.H. Vaas ◽  
...  
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Pollutants ◽  
Housing Stock ◽  
International Health ◽  
Health Organizations ◽  
Dutch Housing ◽  
International Health Organizations

Several national and international health organizations have derived concentration levels below which adverse effects on men are not expected or levels below which the excess risk for individuals is less than a specified value. For every priority pollutant indoor concentrations below this limit are considered “healthy.” The percentage of Dutch homes exceeding such a limit is taken as a measure of indoor air quality for that component. The present and future indoor air quality of the Dutch housing stock is described for fourteen air pollutants. The highest percentages are scored by radon, environmental tobacco smoke, nitrogen dioxide from unvented combustion, and the potential presence of housedust mite and mould allergen in damp houses. Although the trend for all priority pollutants is downward the most serious ones remain high in the coming decades if no additional measures will be instituted.

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