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Indoor air quality

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https://www.readbyqxmd.com/read/28645052/cardiorespiratory-responses-of-air-filtration-a-randomized-crossover-intervention-trial-in-seniors-living-in-beijing-beijing-indoor-air-purifier-study-biapsy
#1
Danqing Shao, Yipeng Du, Shuo Liu, Bert Brunekreef, Kees Meliefste, Qian Zhao, Jie Chen, Xiaoming Song, Meng Wang, Juan Wang, Hongbing Xu, Rongshan Wu, Tong Wang, Baihuan Feng, Candice Shih-Chun Lung, Xian Wang, Bei He, Wei Huang
In this Beijing Indoor Air Purifier StudY (BIAPSY), we conducted a randomized crossover intervention trial in a panel of 35 non-smoking senior participants with free-living, with and without chronic obstructive pulmonary disease (COPD). Portable air filtration units were randomly allocated to active-(filter in) for 2weeks and sham-mode (filter out) for 2weeks in the households. We examined the differences in indoor air pollutant concentrations in 20 study homes and a suite of cardio-respiratory biomarker levels in study participants between filtration modes, with and without adjustment for potential confounders...
June 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28626790/data-on-records-of-indoor-temperature-and-relative-humidity-in-a-university-building
#2
O Irulegi, A Serra, R Hernández
Good indoor comfort and air quality are essential for correct educational development. Most reports in this field focus on primary and secondary school buildings, with numerous projects conducted in the Mediterranean Zone. However, little has been done in the context of university buildings. Data on indoor temperature and relative humidity data acquired trough field surveys of a seminar room located in the Architecture Faculty in San Sebastian (Spain) is provided in this paper. The seminar room was monitored during a typical spring week...
August 2017: Data in Brief
https://www.readbyqxmd.com/read/28609222/thoracic-and-respirable-aerosol-fractions-of-spray-products-containing-non-volatile-compounds
#3
Katharina Schwarz, Wolfgang Koch
A versatile and simple mass balance method for the measurement of the release fraction of thoracic and respirable particles of non-volatile compounds of spray products is presented. The release fractions are defined as the ratio between the mass of suspended non-volatile particulate matter in the thoracic, respectively, respirable particle size range and the total mass of non-volatile material released with the spray action. For its determination, a spray bolus of short duration and of defined mass is sprayed into a well stirred control chamber...
June 13, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28600748/teacher-respiratory-health-symptoms-in-relation-to-school-and-home-environment
#4
Shao Lin, Wayne R Lawrence, Ziqiang Lin, Melissa Francois, Iulia A Neamtiu, Qiaoxuan Lin, Eva Csobod, Eugen S Gurzau
PURPOSE: Few studies have evaluated teachers' respiratory health, especially its relationship with school/home environment, and school policies. This study assessed asthma and smoking prevalence among teachers in Romania, teacher's perception and knowledge of the school environment, policies and asthma management, and how school and home environment affected asthma, allergy, and respiratory infection symptoms. METHODS: This cross-sectional study obtained information from 104 Romanian teachers utilizing teacher questionnaire data for Romania only, as part of the Schools Indoor Pollution and Health: Observatory Network in Europe (SINPHONIE) study, a multicenter European research project conducted between 2010 and 2012...
June 9, 2017: International Archives of Occupational and Environmental Health
https://www.readbyqxmd.com/read/28592396/prevalence-of-and-risk-factors-for-childhood-asthma-rhinitis-and-eczema-in-hong-kong-proposal-for-a-cross-sectional-survey
#5
So Lun Lee, Yu Lung Lau, Hing Sang Wong, Linwei Tian
BACKGROUND: Previous studies have shown that particulate matter is a major problem in indoor air quality in Hong Kong schools, but little has been done to assess its relationship with health indicators in the children attending those schools. Our study aims to address this research gap by collecting aerosol data in schools to examine the link between different air pollutants with childhood respiratory health. It is important to explore whether or not the prevalence of asthma, allergic rhinoconjunctivitis, and eczema are increasing in local children...
June 7, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28590436/volatile-organic-compounds-in-anatomical-pathology-wards-comparative-and-qualitative-assessment-of-indoor-airborne-pollution
#6
Massimo Cipolla, Alberto Izzotti, Filippo Ansaldi, Paolo Durando, Maria Teresa Piccardo
The impact of volatile organic compounds (VOCs) on indoor air quality and on human health is widely recognized. However, VOC contamination in hospital indoor air is rarely studied and chemical compounds that singularly do not show high toxicity are not submitted to any regulation. This study aimed to compare VOC contamination in two different anatomical pathology wards in the same hospital. Hydrocarbons, alcohols, and terpenes were sampled by passive diffusive samplers. Analytical tests were performed by thermal desorption coupled with gas chromatography and mass spectrometry detector...
June 7, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28574753/diurnal-and-seasonal-variations-of-odor-and-gas-emissions-from-a-naturally-ventilated-free-stall-dairy-barn-on-the-canadian-prairies
#7
Dandan Huang, Huiqing Guo
This study characterized the seasonal concentration (C) and emission (E) patterns of odor, ammonia (NH3), and hydrogen sulfide (H2S) over the course of a whole year and their diurnal patterns in cold, warm, and mild seasons for a naturally ventilated free-stall dairy barn. It was found that seasonal odor, NH3, and H2S emissions varied greatly: from 17.2 to 84.4 OU s(-1) AU(-1) (Animal Unit, 500 kg of animal body mass), from 0.27 to 0.92 mg s(-1) AU(-1), and from 3 to 105 μg s(-1) AU(-1), respectively. The overall concentrations of odor and NH3 were higher in the winter, whereas the emissions were higher in the mild and warm seasons...
June 2, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28573443/indoor-exposure-to-volatile-organic-compounds-in-children-health-risk-assessment-in-the-context-of-physiological-development
#8
Radoslaw Czernych, Artur J Badyda, Grazyna Gałęzowska, Lidia Wolska, Pawel Zagożdżon
Indoor air quality is strongly affected by the contamination of ambient air and that related to building and finishing materials and to human activity. Poor ventilation of closed spaces facilitates retention of greater quantity of pollutants. Infants and children are at particular risk of exposure to indoor air pollutants as they undergo rapid physiological and biochemical changes and demonstrate activity patterns unlike those in adults. Health risk assessment in children should be carried out with regard to children-specific factors, since these factors may constitute a source of errors...
June 2, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28569620/indoor-air-quality-in-preschools-3-to-5-year-old-children-in-the-northeast-of-portugal-during-spring-summer-season-pollutants-and-comfort-parameters
#9
Marta Oliveira, Klara Slezakova, Cristina Delerue-Matos, Maria do Carmo Pereira, Simone Morais
Indoor air quality at schools (elementary, primary) has been the subject of many studies; however, there are still relative few data regarding preschool (3- to 5-year-old children) environments. This investigation determined the concentrations of particulate matter (PM)2.5, total volatile organic compounds (TVOC), formaldehyde, carbon monoxide (CO), and ozone (O3) as well as the levels of carbon dioxide (CO2), temperature, and relative humidity (RH) in the indoor and outdoor air of two preschools situated in different geographical regions of Portugal...
June 1, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28561795/evaluation-of-low-cost-mitigation-measures-implemented-to-improve-air-quality-in-nursery-and-primary-schools
#10
Juliana P Sá, Pedro T B S Branco, Maria C M Alvim-Ferraz, Fernando G Martins, Sofia I V Sousa
Indoor air pollution mitigation measures are highly important due to the associated health impacts, especially on children, a risk group that spends significant time indoors. Thus, the main goal of the work here reported was the evaluation of mitigation measures implemented in nursery and primary schools to improve air quality. Continuous measurements of CO₂, CO, NO₂, O₃, CH₂O, total volatile organic compounds (VOC), PM₁, PM2.5, PM10, Total Suspended Particles (TSP) and radon, as well as temperature and relative humidity were performed in two campaigns, before and after the implementation of low-cost mitigation measures...
May 31, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28558284/characterization-of-pm2-5-exposure-concentration-in-transport-microenvironments-using-portable-monitors
#11
Zhiyuan Li, Wenwei Che, H Christopher Frey, Alexis K H Lau, Changqing Lin
Recently, portable monitors have been increasingly used to quantify air pollutant concentrations at high spatiotemporal resolution. A sampling campaign was conducted to measure the fine particulate matter (PM2.5) and carbon monoxide (CO) exposure concentrations in transport microenvironments (TMEs) in Hong Kong in January and June 2015 using TSI DustTrak and Q-Trak portable monitors. The objectives were to: (1) calibrate DustTrak and Q-Trak; (2) evaluate variability between seasons and microenvironments; (3) estimate indoor/outdoor relationships; and (4) determine minimum sample size...
May 27, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28545099/fine-particles-in-homes-of-predominantly-low-income-families-with-children-and-smokers-key-physical-and-behavioral-determinants-to-inform-indoor-air-quality-interventions
#12
Neil E Klepeis, John Bellettiere, Suzanne C Hughes, Benjamin Nguyen, Vincent Berardi, Sandy Liles, Saori Obayashi, C Richard Hofstetter, Elaine Blumberg, Melbourne F Hovell
Children are at risk for adverse health outcomes from occupant-controllable indoor airborne contaminants in their homes. Data are needed to design residential interventions for reducing low-income children's pollutant exposure. Using customized air quality monitors, we continuously measured fine particle counts (0.5 to 2.5 microns) over a week in living areas of predominantly low-income households in San Diego, California, with at least one child (under age 14) and at least one cigarette smoker. We performed retrospective interviews on home characteristics, and particle source and ventilation activities occurring during the week of monitoring...
2017: PloS One
https://www.readbyqxmd.com/read/28536962/trace-element-contents-in-fine-particulate-matter-pm2-5-in-urban-school-microenvironments-near-a-contaminated-beach-with-mine-tailings-cha%C3%A3-aral-chile
#13
Stephanie Mesías Monsalve, Leonardo Martínez, Karla Yohannessen Vásquez, Sergio Alvarado Orellana, José Klarián Vergara, Miguel Martín Mateo, Rogelio Costilla Salazar, Mauricio Fuentes Alburquenque, Dante D Cáceres Lillo
Air quality in schools is an important public health issue because children spend a considerable part of their daily life in classrooms. Particulate size and chemical composition has been associated with negative health effects. We studied levels of trace element concentrations in fine particulate matter (PM2.5) in indoor versus outdoor school settings from six schools in Chañaral, a coastal city with a beach severely polluted with mine tailings. Concentrations of trace elements were measured on two consecutive days during the summer and winter of 2012 and 2013 and determined using X-ray fluorescence...
May 23, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28534713/the-influence-of-thermal-comfort-on-the-quality-of-life-of-nursing-home-residents
#14
Ana Mendes, Ana Luísa Papoila, Pedro Carreiro-Martins, Lívia Aguiar, Stefano Bonassi, Iolanda Caires, Teresa Palmeiro, Álvaro Silva Ribeiro, Paula Neves, Cristiana Pereira, Amália Botelho, Nuno Neuparth, João Paulo Teixeira
Thermal comfort (TC) parameters were measured in 130 rooms from nursing homes (NH), following ISO 7730:2005 in order to evaluate the influence of winter season TC indices on quality of life (QoL) in older individuals. Mean radiant temperature (mrT), predicted mean vote (PMV) and predicted percent of dissatisfied people (PPD) indices, and the respective measurement uncertainties were calculated using Monte Carlo Method. The WHOQOL-BREF questionnaire was conducted from September 2012 to April 2013, during the winter season TC sampling campaign...
May 23, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28520744/indoor-simulations-reveal-differences-among-plant-species-in-capturing-particulate-matter
#15
Jungang Chen, Xinxiao Yu, Huaxing Bi, Yanlin Fu
A number of studies have focused on the capacity of urban trees and shrubs to serve as efficient biological filters to mitigate air pollution. In this study, five different tree species were assessed for this function. Kerria japonica, Sophora japonica, Philadelphus pekinensis, Gleditsia sinensis, and Prunus persica 'Atropurpurea' were tested in a deposition chamber using (NH4)2SO4 particles. We quantified and compared the capability of all tested trees to remove particles by assessing deposition velocity, a measure of the ability to remove particles...
2017: PloS One
https://www.readbyqxmd.com/read/28512342/a-gas-sensor-array-for-the-simultaneous-detection-of-multiple-vocs
#16
Yumin Zhang, Jianhong Zhao, Tengfei Du, Zhongqi Zhu, Jin Zhang, Qingju Liu
Air quality around the globe is declining and public health is seriously threatened by indoor air pollution. Typically, indoor air pollutants are composed of a series of volatile organic compounds (VOCs) that are generally harmful to the human body, especially VOCs with low molecular weights (less than 100 Da). Moreover, in some situations, more than one type of VOC is present; thus, a device that can detect one or more VOCs simultaneously would be most beneficial. Here, we synthesized a sensor array with 4 units to detect 4 VOCs: acetone (unit 1), benzene (unit 2), methanol (unit 3) and formaldehyde (unit 4) simultaneously...
May 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28506010/re-evaluation-of-a-leed-platinum-building-occupant-experiences-of-health-and-comfort
#17
Julie Dorsey, Alan Hedge
BACKGROUND: There is a need to better understand the perceived experiences of workers in green buildings as the literature to this point has been mixed. OBJECTIVES: To re-evaluate occupant experiences within a LEED platinum building and investigate current experiences in general. METHODS: An online post occupancy evaluation (POE) survey of 62 occupants of LEED Platinum building on a US college campus is reported. The online survey addressed indoor environmental quality in relation to health, productivity and satisfaction...
2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/28493625/significant-oh-production-under-surface-cleaning-and-air-cleaning-conditions-impact-on-indoor-air-quality
#18
Nicola Carslaw, Louise Fletcher, Dwayne Heard, Trevor Ingham, Hannah Walker
We report measurements of hydroxyl (OH) and hydroperoxy (HO2 ) radicals made by laser-induced fluorescence spectroscopy in a computer classroom (i) in the absence of indoor activities (ii) during desk cleaning with a limonene-containing cleaner (iii) during operation of a commercially available 'air cleaning' device. In the unmanipulated environment, the one-minute averaged OH concentration remained close to or below the limit of detection (6.5 x 10(5) molecule cm(-3) ), whilst that of HO2 was 1.3 x 10(7) molecule cm(-3) ...
May 11, 2017: Indoor Air
https://www.readbyqxmd.com/read/28481324/chemical-characterization-of-the-indoor-air-quality-of-a-university-hospital-penetration-of-outdoor-air-pollutants
#19
Paul T J Scheepers, Luuk Van Wel, Gwendolyn Beckmann, Rob B M Anzion
For healthcare centers, local outdoor sources of air pollution represent a potential threat to indoor air quality (IAQ). The aim of this study was to study the impact of local outdoor sources of air pollution on the IAQ of a university hospital. IAQ was characterized at thirteen indoor and two outdoor locations and source samples were collected from a helicopter and an emergency power supply. Volatile organic compounds (VOC), acrolein, formaldehyde, nitrogen dioxide (NO₂), respirable particulate matter (PM-4...
May 8, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28475439/occupational-exposure-of-aldehydes-resulting-from-the-storage-of-wood-pellets
#20
Mohammad Arifur Rahman, Alan Rossner, Philip K Hopke
An exposure assessment was conducted to investigate the potential for harmful concentrations of airborne short chain aldehydes emitted from recently stored wood pellets. Wood pellets can emit a number of airborne aldehydes include acetaldehyde, formaldehyde, propionaldehyde, butyraldehyde, valeraldehyde, and hexanal. Exposure limits have been set for these compounds since they can result in significant irritation of the upper respiratory system at elevated concentrations. Formaldehyde is a recognized human carcinogen and acetaldehyde is an animal carcinogen...
June 2017: Journal of Occupational and Environmental Hygiene
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