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Indoor air quality

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https://www.readbyqxmd.com/read/28919325/the-influence-of-lifestyle-on-airborne-particle-surface-area-doses-received-by-different-western-populations
#1
A Pacitto, L Stabile, T Moreno, P Kumar, A Wierzbicka, L Morawska, G Buonanno
In the present study, the daily dose in terms of particle surface area received by citizens living in five cities in Western countries, characterized by different lifestyle, culture, climate and built-up environment, was evaluated and compared. For this purpose, the exposure to sub-micron particle concentration levels of the population living in Barcelona (Spain), Cassino (Italy), Guilford (United Kingdom), Lund (Sweden), and Brisbane (Australia) was measured through a direct exposure assessment approach. In particular, measurements of the exposure at a personal scale were performed by volunteers (15 per each population) that used a personal particle counter for different days in order to obtain exposure data in microenvironments/activities they resided/performed...
September 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28911939/evaluation-of-airborne-sensory-irritants-for-setting-exposure-limits-or-guidelines-a-systematic-approach
#2
REVIEW
Gunnar Damgaard Nielsen, Peder Wolkoff
Sensory irritation of eyes and upper airways is an important endpoint for setting occupational exposure limits (OELs) and indoor air guidelines. Sensory irritants cause a painful burning, stinging and itching sensation. Controlled chamber studies are the "golden standard" for evaluations. Well conducted workplace studies offer another possibility. For generalization, the number of participants and their age, smoking, gender, and prior exposure, experience and mood has to be considered. Exposure assessments have to be reliable and exposure duration sufficiently long to establish time-response relationships...
September 11, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28895888/health-effects-of-ambient-air-pollution-in-developing-countries
#3
REVIEW
Pier Mannuccio Mannucci, Massimo Franchini
The deleterious effects of ambient air pollution on human health have been consistently documented by many epidemiologic studies worldwide, and it has been calculated that globally at least seven million deaths are annually attributable to the effects of air pollution. The major air pollutants emitted into the atmosphere by a number of natural processes and human activities include nitrogen oxides, volatile organic compounds, and particulate matter. In addition to the poor ambient air quality, there is increasing evidence that indoor air pollution also poses a serious threat to human health, especially in low-income countries that still use biomass fuels as an energy resource...
September 12, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28886960/-indoor-air-quality-and-parents-of-asthmatic-children-practices
#4
S Larramendy Magnin, B Desssome, L Moret
BACKGROUND: Indoor air pollution can worsen asthma in children. Better knowledge of factors determining parents' reception of recommendations to limit pollution of indoor air in the homes of asthmatic children would be helpful to improve implementation. METHOD: A descriptive study evaluating practices known to have an impact on the quality of air in homes was conducted among parents of asthmatic children aged 3 to 16 years. From May to September 2013, parents answered anonymous self-administered questionnaires in waiting rooms of generalist practitioners, in the Nantes University pneumology pediatric outpatient clinic, and as part of therapeutic education sessions conducted by the Asthma-44 Network...
September 5, 2017: Revue D'épidémiologie et de Santé Publique
https://www.readbyqxmd.com/read/28871430/-electronic-shiazo-waterpipes-a%C3%A2-new-source-of-indoor-air-pollutants
#5
Wolfgang Schober, Wolfgang Matzen, Katalin Szendrei, Dieter Heitmann, Thomas Schettgen, Hermann Fromme
BACKGROUND: For some time, a new form of waterpipe smoking has been advertised, where steam stones moistened with aroma fluids (Shiazo) are heated electronically. Since there is no combustion of tobacco, it is often assumed that the produced vapor is not harmful to health. To clarify this issue, we performed a comprehensive inner and outer exposure assessment during the use of an electronic Shiazo waterpipe. METHODS: Three volunteers smoked an electronic waterpipe operated with nicotine-free Shiazo stones in a thoroughly ventilated room for 2 h...
September 4, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
https://www.readbyqxmd.com/read/28858713/assessment-of-indoor-air-quality-exposures-and-impacts-on-respiratory-outcomes-in-river-rouge-and-dearborn-michigan
#6
Erika Cleary, Mary Asher, Richard Olawoyin, Kuangyuan Zhang
Ambient air pollution is a public health issue which could potentially exacerbate pre-existing respiratory conditions and contribute to increases in asthma incidence. This study aims to address gaps in understanding how IAQ is impacted by outdoor air quality, which was done by sampling for indoor gaseous and particulate pollutants in residence and facilities near the sources of pollution. The study areas were selected due to non-attainment status with air quality standards, as well as demographic and socioeconomic status of those residing in these areas...
August 22, 2017: Chemosphere
https://www.readbyqxmd.com/read/28856497/simulations-of-the-impacts-of-building-height-layout-on-air-quality-in-natural-ventilated-rooms-around-street-canyons
#7
Fang Yang, Ke Zhong, Yonghang Chen, Yanming Kang
Numerical simulations were conducted to investigate the effects of building height ratio (i.e., HR, the height ratio of the upstream building to the downstream building) on the air quality in buildings beside street canyons, and both regular and staggered canyons were considered for the simulations. The results show that the building height ratio affects not only the ventilation fluxes of the rooms in the downstream building but also the pollutant concentrations around the building. The parameter, outdoor effective source intensity of a room, is then proposed to calculate the amount of vehicular pollutants that enters into building rooms...
August 30, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28830050/aromatic-hydrocarbons-in-a-controlled-ecological-life-support-system-during-a-4-person-180-day-integrated-experiment
#8
Kun Dai, Qingni Yu, Zhou Zhang, Yuan Wang, Xinming Wang
Indoor air quality is vital to the health and comfort of people who live inside a controlled ecological life support system (CELSS) built for long-term space explorations. Here we measured aromatic hydrocarbons to assess their sources and health risks during a 4-person-180-day integrated experiment inside a CELSS with four cabins for growing crops, vegetables and fruits and other two cabins for working, accommodations and resources management. During the experiment, the average concentrations of benzene, ethylbenzene, m,p-xylenes and o-xylene were found to decrease exponentially from 7...
August 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28829721/assessment-of-indoor-levels-of-volatile-organic-compounds-and-carbon-dioxide-in-schools-in-kuwait
#9
Layla Al-Awadi
Indoor air quality (IAQ) in schools is a matter of concern because children are most vulnerable and sensitive to pollutant exposure. Conservation of energy at the expense of ventilation in heating, ventilation, and air conditioning (HVAC) systems adversely affects IAQ. Extensive use of new materials in building, fitting, and refurbishing emit various pollutants such that the indoor environment creates its own discomfort and health risks. Various schools in Kuwait were selected to assess their IAQ. Comprehensive measurements of volatile organic compounds (VOCs) consisting of 72 organic compounds consisting of aliphatic (C3-C6), aromatic (C6-C9), halogenated (C1-C6), and oxygenated (C2-C9) functional groups in indoor air were made for the first time in schools in Kuwait...
August 22, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28829382/influence-of-binders-and-lightweight-aggregates-on-the-properties-of-cementitious-mortars-from-traditional-requirements-to-indoor-air-quality-improvement
#10
Chiara Giosuè, Mattia Pierpaoli, Alessandra Mobili, Maria Letizia Ruello, Francesca Tittarelli
Innovative and multifunctional mortars for renders and panels were manufactured using white photocatalytic and non-photocatalytic cement as binder. Unconventional aggregates, based on lightweight materials with high specific surface and adsorbent properties, were adopted in order to investigate the possible ability to passively improve indoor air quality. The reference mortar was manufactured with traditional calcareous sand. Results show that even if the mechanical properties of mortars with unconventional aggregates generally decrease, they remain acceptable for application as render...
August 22, 2017: Materials
https://www.readbyqxmd.com/read/28826667/ecology-of-the-cardiovascular-system-a-focus-on-air-related-environmental-factors
#11
REVIEW
Jean François Argacha, T Bourdrel, P van de Borne
Cardiology is a newcomer to environmental sciences. We aim to propose an original review of the scientific evidence regarding the effects of the environment on cardiovascular health. We report first influences of air-related environmental factors. Air temperature has a strong influence on cardiovascular mortality characterized by a V-like relationship confirming that both cold and hot periods have negative cardiovascular impacts. Furthermore, dynamic changes in temperature are likely more important than the absolute air temperature level...
August 4, 2017: Trends in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28819240/nature-and-characteristics-of-temperature-background-effect-for-interactive-respiration-process
#12
Guangcai Gong, Xiaorui Deng
Indoor air quality (IAQ) is much more crucial to human health than its atmospheric air quality counterpart. Improving indoor air environment requires investigating how different indoor air stability affects airflow trajectory. By presenting both manikin experiment and Computational Fluid Dynamics (CFD) simulation, we find that temperature background effect, i.e., indoor air stability, which is a measure of the nature or attribute of the capacity to keep the original or initial inertia force or inertia transmission state instead of turbulence diffusion or transmission restraining state, i...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810512/co-digestion-of-rice-straw-and-cow-dung-to-supply-cooking-fuel-and-fertilizers-in-rural-india-impact-on-human-health-resource-flows-and-climate-change
#13
Sophie Sfez, Steven De Meester, Jo Dewulf
Anaerobic digestion of cow dung with new feedstock such as crop residues to increase the biogas potential is an option to help overcoming several issues faced by India. Anaerobic digestion provides biogas that can replace biomass cooking fuels and reduce indoor air pollution. It also provides digestate, a fertilizer that can contribute to compensate nutrient shortage on agricultural land. Moreover, it avoids the burning of rice straw in the fields which contributes to air pollution in India and climate change globally...
December 31, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28783215/sensitization-to-dust-mite-defines-different-phenotypes-of-asthma-a-multicenter-study
#14
Silvia Ruggieri, Gaspare Drago, Valeria Longo, Paolo Colombo, Martin Balzan, David Bilocca, Christopher Zammit, Stephen Montefort, Gianluca Scaccianoce, Giuseppina Cuttitta, Giovanni Viegi, Fabio Cibella
BACKGROUND: Indoor allergens are risk factors for asthma: thus, the characterization of indoor air quality is important for studying environment-health relationships in children. In particular, Dermatophagoides pteronyssinus is the dominant allergen for asthma. We cross-sectionally investigated the relationships among respiratory symptoms and function, airway inflammation, allergen sensitization and indoor allergen concentration. METHODS: One hundred thirty two children aging 10-14 years and living in a Southern Mediterranean area were evaluated by parental questionnaires...
August 7, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/28768223/predicting-pm10-concentration-in-seoul-metropolitan-subway-stations-using-artificial-neural-network-ann
#15
Sechan Park, Minjeong Kim, Minhae Kim, Hyeong-Gyu Namgung, Ki-Tae Kim, Kyung Hwa Cho, Soon-Bark Kwon
The indoor air quality of subway systems can significantly affect the health of passengers since these systems are widely used for short-distance transit in metropolitan urban areas in many countries. The particles generated by abrasion during subway operations and the vehicle-emitted pollutants flowing in from the street in particular affect the air quality in underground subway stations. Thus the continuous monitoring of particulate matter (PM) in underground station is important to evaluate the exposure level of PM to passengers...
July 25, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28726384/lightweight-room-temperature-co2-gas-sensor-based-on-rare-earth-metal-free-composites-an-impedance-study
#16
Christoph Willa, Alexander Schmid, Danick Briand, Jiayin Yuan, Dorota Koziej
We report a light, flexible, and low-power poly(ionic liquid)/alumina composite CO2 sensor. We monitor the direct-current resistance changes as a function of CO2 concentration and relative humidity and demonstrate fast and reversible sensing kinetics. Moreover, on the basis of the alternating-current impedance measurements we propose a sensing mechanism related to proton conduction and gas diffusion. The findings presented herein will promote the development of organic/inorganic composite CO2 gas sensors. In the future, such sensors will be useful for numerous practical applications ranging from indoor air quality control to the monitoring of manufacturing processes...
August 2, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28710404/assuring-quality-in-microplastic-monitoring-about-the-value-of-clean-air-devices-as-essentials-for-verified-data
#17
Charlotte Wesch, Anna Maria Elert, Manuel Wörner, Ulrike Braun, Roland Klein, Martin Paulus
Avoiding aerial microfibre contamination of environmental samples is essential for reliable analyses when it comes to the detection of ubiquitous microplastics. Almost all laboratories have contamination problems which are largely unavoidable without investments in clean-air devices. Therefore, our study supplies an approach to assess background microfibre contamination of samples in the laboratory under particle-free air conditions. We tested aerial contamination of samples indoor, in a mobile laboratory, within a laboratory fume hood and on a clean bench with particles filtration during the examining process of a fish...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28692913/particle-and-bioaerosol-characteristics-in-a-paediatric-intensive-care-unit
#18
Congrong He, Ian M Mackay, Kay Ramsay, Zhen Liang, Timothy Kidd, Luke D Knibbs, Graham Johnson, Donna McNeale, Rebecca Stockwell, Mark G Coulthard, Debbie A Long, Tara J Williams, Caroline Duchaine, Natalie Smith, Claire Wainwright, Lidia Morawska
The paediatric intensive care unit (PICU) provides care to critically ill neonates, infants and children. These patients are vulnerable and susceptible to the environment surrounding them, yet there is little information available on indoor air quality and factors affecting it within a PICU. To address this gap in knowledge we conducted continuous indoor and outdoor airborne particle concentration measurements over a two-week period at the Royal Children's Hospital PICU in Brisbane, Australia, and we also collected 82 bioaerosol samples to test for the presence of bacterial and viral pathogens...
July 7, 2017: Environment International
https://www.readbyqxmd.com/read/28686964/relative-importance-of-13-correlates-of-child-stunting-in-south-asia-insights-from-nationally-representative-data-from-afghanistan-bangladesh-india-nepal-and-pakistan
#19
Rockli Kim, Iván Mejía-Guevara, Daniel J Corsi, Víctor M Aguayo, S V Subramanian
Optimal growth and development in early childhood is determined by a complex interplay of child, maternal, household, environmental, and socioeconomic factors that influence nutritional intake, but interventions to reduce child undernutrition sometimes target specific risk factors in isolation. In this analysis, we assess the relative importance of 13 correlates of child stunting selected based on a collective review of existing multi-factorial frameworks: complementary feeding, breastfeeding, feeding frequency, dietary diversity, maternal height, body mass index (BMI), education, age at marriage, child vaccination, access to improved drinking source and sanitation facilities, household indoor air quality, and household wealth...
June 16, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28683154/real-world-volatile-organic-compound-emission-rates-from-seated-adults-and-children-for-use-in-indoor-air-studies
#20
C Stönner, A Edtbauer, J Williams
Human beings emit many volatile organic compounds (VOCs) of both endogenous (internally produced) and exogenous (external source) origin. Here we present real-world emission rates of volatile organic compounds from cinema audiences (50-230 people) as a function of time in multiple screenings of three films. The cinema location and film selection allowed high-frequency measurement of human-emitted VOCs within a room flushed at a known rate so that emissions rates could be calculated for both adults and children...
July 6, 2017: Indoor Air
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