scholarly journals Indoor air quality in wards of dental school clinic: Variations of VOCs, CO2 and airborne particle levels

2022 ◽  
Author(s):  
Mojtaba Bayani ◽  
Seyed Hamed Mirhoseini ◽  
Ali Koolivand ◽  
Hamid Sarlak ◽  
Rahmatollah Moradzadeh ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Sampling Site ◽  
Waiting Room ◽  
Bacterial Genus ◽  
Dental Clinics ◽  
Sampling Locations ◽  
Patient Waiting

Introduction: The indoor environment of dental clinics may endanger dental patients and personnel and due to a great variety of air pollutants throughout the usual dental operation. The purpose of the present cross-sectional study was the evaluation of Indoor Air Quality (IAQ) and factors affecting it in a dentistry faculty of Arak University of Medical Sciences. Material and methods: The IAQ of five dental active wards and the patient waiting room was evaluated. The concentrations of Total Volatile Organic Compounds (TVOC), CO2, particulate matter, and bioaerosols were measured. Results: The TVOCs concentration in sampling locations ranged between 817 to 3670 μg/m3 during dental work and exceeded the Leadership in Energy and Environmental Design (LEED) guideline in all sampling locations. The highest values of Particulate Matter (PM) for PM10, PM2.5, and PM1 were observed in the periodontics ward, while the lowest values were observed in the endodontics ward. The PM2.5 concentrations exceeded the WHO limit in periodontics and pediatric wards. TVOC levels had a significant positive correlation with temperature (r=0.374, p<0.01) and RH (r=0.265, p<0.05). The predominant bacterial genus of the patient waiting area was Bacillus (36%), while the dominant bacterial genus of the other sampling site was Micrococcus spp. Penicillium (35.5%) and Cladosporium (28%) were the predominant fungi detected. Conclusion: Controlling of airborne particles is to be standardized by the infection control actions of dental clinics and improved ventilation capacity in the air conditioning system was suggested for reducing VOCs and PM concentrations.

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

Atmosphere ◽  
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.

scholarly journals Residents’ Perceptions of and Response Behaviors to Particulate Matter—A Case Study in Seoul, Korea

2019 ◽  
Vol 9 (18) ◽  
pp. 3660 ◽  
Author(s):  
Myung Eun Cho ◽  
Mi Jeong Kim
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Physical Symptoms ◽  
Influential Factor ◽  
Psychological Attributes ◽  
Mitigation Action ◽  
Response Behaviors

This study is interested in understanding the particulate matter perceptions and response behaviors of residents. The purpose of this study was to identify indoor air quality along with the response behaviors of residents in Seoul, to ascertain whether there is a difference in behaviors when particulate matter is present, according to the characteristics of residents and to grasp the nature of this difference. A questionnaire survey of 171 respondents was conducted. The questionnaire measured the indoor air quality perceived by residents, the health symptoms caused by particulate matter, residents’ response behaviors to particulate matter and the psychological attributes affecting those response behaviors. Residents of Seoul were divided into college students in their twenties, male workers in their thirties and forties and female housewives in their thirties and forties. The data were calibrated by SPSS 23 using a one-way analysis of variance (ANOVA) and multiple regression analyses. The results show that most people found particulate matter to be an important problem but were unable to do sufficient mitigation action to prevent its presence. Residents showed greater psychological stress resulting in difficulty going out than physical symptoms. The most influential factor on response behaviors was psychological attributes. Participants were aware of the risks of particulate matter but believed it to be generated by external factors; thus, they felt powerless to do anything about it, which proved to be an obstacle to response behaviors.

scholarly journals A Study of Indoor Air Quality in Refurbished Museum Building

2018 ◽  
Vol 4 (11) ◽  
pp. 2596 ◽  
Author(s):  
Syahrun Neizam Mohd Dzullkiflli ◽  
Abd Halid Abdullah ◽  
Lee Yee Yong ◽  
Abdul Mutalib Leman ◽  
Samiullah Sohu
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Sulfur Dioxide ◽  
Nitrogen Dioxide ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Fine Particles ◽  
Gaseous Pollutant ◽  
Healthy Environment ◽  
New Buildings

Problem related with indoor air quality (IAQ), is rapidly becoming a major health issue as people spend almost 90% of their time indoors. Museums were established in Malaysia more than hundred years ago. Since the year 2005, Malaysia has been moving away from constructing new buildings in favour of refurbishing historic and old ones. A healthy environment at the museum building has been identified as one of the important element that must been considered, but it is not sure either IAQ in the museum building provide a good air quality or not. The purpose of this study is to determine the actual indoor environment of the museum building in Melaka. In this study, the IAQ measurement were conduct for six days at the Melaka Sultanate Palace Museum and at the History and Ethnography Museum. During the measurement, IAQ parameters of gaseous pollutant of nitrogen dioxide, sulfur dioxide and carbon dioxide, and particulate matter of fine particles were recorded by using specific IAQ equipment. The finding of this study indicates that the distance of buildings from roadways appears to have an impact on indoor environmental levels, especially for nitrogen dioxide, sulfur dioxide and particulate matter. Based on the results, only gaseous pollutant of sulfur dioxide had not exceeding the acceptable TLV compared to the other IAQ pollutants.

scholarly journals The Effects of Outdoor Source on Pollution Characteristics and Dynamic Changes of Particulate Matter in an Office

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Guozhong Zheng ◽  
Yuzhen Lu ◽  
Yajing Wang ◽  
Zhengzheng Zhao ◽  
Ke Li ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Mass Concentration ◽  
Dynamic Changes ◽  
Maximum Increase ◽  
Pollution Characteristics ◽  
Indoor Particulate Matter ◽  
Outdoor Pm10

The indoor air quality has a direct impact on human health. Particulate matter is one of the important factors affecting the indoor air quality. The paper selects an office as the study object and studies the pollution characteristics and dynamic changes of indoor particulate matter in different outdoor pollution levels. The mass concentration of outdoor PM10 is used as the evaluation basis of the outdoor pollution level. The outdoor PM10 concentration levels are divided into the range of 200–300, 300–400, 400–500, 500–600, 600–700 μg·m−3, individually. Firstly, the change characteristics of the mass concentration and the number concentration of the particulate matter in the five outdoor conditions are analyzed. Secondly, the maximum increase values and the maximum increase rates of the mass concentrations of different particle sizes in the five conditions are compared. Then, the penetration factors of the particulates in different sizes are compared among the five conditions. Finally, the correlation between indoor particulate matter and outdoor particulate matter is studied. The study results show that the effect of outdoor infiltration has a great influence on the indoor PM1 mass concentration, and the penetrating factors of the particulate matter between 0.3 μm and 0.5 μm are higher than 0.6; their permeability is the most obvious.

scholarly journals Efficiency of an Air Cleaner Device in Reducing Aerosol Particulate Matter (PM) in Indoor Environments

2019 ◽  
Vol 17 (1) ◽  
pp. 18 ◽  
Author(s):  
Paola Fermo ◽  
Valeria Comite ◽  
Luigi Falciola ◽  
Vittoria Guglielmi ◽  
Alessandro Miani
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Particle Number ◽  
Indoor Environments ◽  
Aerodynamic Diameter ◽  
Healthy Environment ◽  
Household Environment ◽  
Commercial Device

Indoor air quality (IAQ) in household environments is mandatory since people spend most of their time in indoor environments. In order to guarantee a healthy environment, air purification devices are often employed. In the present work, a commercial household vacuum cleaner has been tested in order to verify its efficiency in reducing the mass concentration and particle number of aerosol particulate matter (PM). The efficiency has been tested measuring, while the instrument was working, PM10 (particles with aerodynamic diameter less than 10 μm), PM2.5 (particles with aerodynamic diameter less than 2.5 μm), PM1 (particles with aerodynamic diameter less than 1 μm), and 7 size-fractions in the range between 0.3 and >10 μm. Measurements have been carried out by means of a portable optical particle counter instrument and simulating the working conditions typical of a household environment. It has been found that the tested commercial device significantly reduces both PM concentrations and particle number, especially in the finest fraction, i.e., particles in the range 0.3–0.5 μm, allowing an improvement of indoor air quality.

Indoor air quality: validation and setting up quality control for determination of anions and cations in particulate matter

2012 ◽  
Vol 17 (2) ◽  
pp. 199-206 ◽  
Author(s):  
Maria Trancoso ◽  
Ana Sousa ◽  
Filomena Mouro ◽  
Maria C. Freitas ◽  
Susana Almeida ◽  
...  
Keyword(s):  
Quality Control ◽  
Particulate Matter ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Anions And Cations ◽  
Determination Of Anions

Influence of combined dust reducing carpet and compact air filtration unit on the indoor air quality of a classroom

2015 ◽  
Vol 17 (2) ◽  
pp. 316-325 ◽  
Author(s):  
Paul T. J. Scheepers ◽  
Jeroen J. de Hartog ◽  
Judith Reijnaerts ◽  
Gwendolyn Beckmann ◽  
Rob Anzion ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Primary School ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Filtration ◽  
School Classroom ◽  
Filtration Unit

In situ testing in a primary school classroom showed that combining air filtration with a carpet reduced particulate matter concentrations.

Indoor air quality in waterpipe cafés: exposure level to particulate matter

2019 ◽  
Vol 26 (26) ◽  
pp. 26605-26616 ◽  
Author(s):  
Kazem Naddafi ◽  
Ramin Nabizadeh ◽  
Roohollah Rostamy ◽  
Mohammad Ebrahimi Kalan ◽  
Mohammad Sadegh Hassanvand ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Exposure Level ◽  
Waterpipe Cafés

Inspection and Analysis for IAQ at the Waiting Room in Lingui Bus Station

2011 ◽  
Vol 250-253 ◽  
pp. 3079-3082
Author(s):  
Zhi Ping Zhou ◽  
Rong Wang ◽  
Chao Huang
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Waiting Room ◽  
Index Method ◽  
Synthetic Index ◽  
Indoor Pollutant ◽  
Standard Value ◽  
Bus Station ◽  
Standard Limit

Indoor air quality has an important impact on human health.In order to find out indoor air quality (IAQ) condition at the waiting room in Guilin Lingui bus station, in the survey, the waiting room IAQ had been investigated with the carry-home fast inspect instrument from Dec 20th to Dec 30th in Lingui Bus Station. The levels of CO2, formaldehyde(HCHO), particles with diameters of 10 um or less(PM10) and total volatile organic compound(TVOC) had been inspected mostly. Data were analyzed by the SPSS 11.0 and evaluated with synthetic index method of air quality. Results showed that CO2 concentration was biggest to 878 ppm(standard limit of 1000ppm), PM10 concentration was biggest to 0.14mg/m3(standard value of 0.15 mg/m3), HCHO concentration was biggest to 0.08 mg/m3(standard value of 0.10 mg/m3). The concentration of other pollutants were lower comparatively. The winter air quality of the waiting room in Lingui bus station belongs to the no pollution. It showed that the levels of indoor pollutant were higher than outdoors', too.

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