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Indoor air quality

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https://www.readbyqxmd.com/read/28432989/the-effect-of-natural-ventilation-strategy-on-indoor-air-quality-in-schools
#1
Luca Stabile, Marco Dell'Isola, Aldo Russi, Angelamaria Massimo, Giorgio Buonanno
In order to reduce children's exposure to pollutants in classrooms a proper ventilation strategy need to be adopted. Such strategy is even more important in naturally ventilated schools where the air exchange rate is only based on the manual airing of classrooms. The present work aimed to evaluate the effect of the manual airing strategy on indoor air quality in Italian classrooms. For this aim, schools located in the Central Italy were investigated. Indoor air quality was studied in terms of CO2, particle number and PM concentrations and compared to corresponding outdoor levels...
April 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28423205/the-impact-of-biogas-and-fuelwood-use-on-institutional-kitchen-air-quality-in-kampala-uganda
#2
Aleia Ingulli McCord, Sarah Adel Stefanos, Vianney Tumwesige, Dorothy Lsoto, Anna Hillstrom Meding, Angela Adong, James Jay Schauer, Rebecca Anne Larson
Experts have suggested that microscale biogas systems offer a source of renewable energy that improves indoor air quality, but such impacts have not been directly measured. This study documented cooking behaviors and measured 2.5 μm particulate matter (PM2.5 ), carbon monoxide (CO), and sulfur dioxide (SO2 ) concentrations within 14 institutional kitchens in Kampala, Uganda that prepare meals using biogas (n=5), a mixture of biogas and fuelwood (n=3), and fuelwood (n=6). Small institutions (10-30 people) with biogas kitchens had 99% lower concentrations of PM2...
April 19, 2017: Indoor Air
https://www.readbyqxmd.com/read/28420188/health-risk-assessment-of-indoor-air-quality-socioeconomic-and-house-characteristics-on-respiratory-health-among-women-and-children-of-tirupur-south-india
#3
Krassi Rumchev, Yun Zhao, Jeffery Spickett
Background: Indoor air pollution is still considered as one of the leading causes of morbidity and mortality worldwide and especially in developing countries, including India. This study aims to assess social, housing, and indoor environmental factors associated with respiratory health among mothers and children. Methods: The study was conducted in the city of Tirupur, South India. We quantitatively assessed the indoor exposure to fine particulate matter (PM2.5) and carbon monoxide in relation to respiratory health among women and children...
April 17, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28409088/city-scale-climate-change-policies-do-they-matter-for-wellbeing
#4
Rosemary Hiscock, Arja Asikainen, Jouni Tuomisto, Matti Jantunen, Erkki Pärjälä, Clive E Sabel
Climate change mitigation policies aim to reduce climate change through reducing greenhouse gas (GHG) emissions whereas adaption policies seek to enable humans to live in a world with increasingly variable and more extreme climatic conditions. It is increasingly realised that enacting such policies will have unintended implications for public health, but there has been less focus on their implications for wellbeing. Wellbeing can be defined as a positive mental state which is influenced by living conditions...
June 2017: Preventive Medicine Reports
https://www.readbyqxmd.com/read/28403894/antibiotic-resistant-airborne-bacteria-and-their-multidrug-resistance-pattern-at-university-teaching-referral-hospital-in-south-ethiopia
#5
Fithamlak Bisetegen Solomon, Fiseha Wada Wadilo, Amsalu Amache Arota, Yishak Leka Abraham
BACKGROUND: Hospitals provide a reservoir of microorganisms, many of which are multi-resistant to antibiotics. Emergence of multi-drug resistant strains in a hospital environment, particularly in developing countries is an increasing problem to infection treatment. This study aims at assessing antibiotic resistant airborne bacterial isolates. METHODS: A cross-sectional study was conducted at Wolaita Sodo university teaching and referral Hospital. Indoor air samples were collected by using passive air sampling method...
April 12, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28398225/a-low-cost-environmental-monitoring-system-how-to-prevent-systematic-errors-in-the-design-phase-through-the-combined-use-of-additive-manufacturing-and-thermographic-techniques
#6
Francesco Salamone, Ludovico Danza, Italo Meroni, Maria Cristina Pollastro
nEMoS (nano Environmental Monitoring System) is a 3D-printed device built following the Do-It-Yourself (DIY) approach. It can be connected to the web and it can be used to assess indoor environmental quality (IEQ). It is built using some low-cost sensors connected to an Arduino microcontroller board. The device is assembled in a small-sized case and both thermohygrometric sensors used to measure the air temperature and relative humidity, and the globe thermometer used to measure the radiant temperature, can be subject to thermal effects due to overheating of some nearby components...
April 11, 2017: Sensors
https://www.readbyqxmd.com/read/28397776/integrating-statistical-machine-learning-in-a-semantic-sensor-web-for-proactive-monitoring-and-control
#7
Jude Adekunle Adeleke, Deshendran Moodley, Gavin Rens, Aderemi Oluyinka Adewumi
Proactive monitoring and control of our natural and built environments is important in various application scenarios. Semantic Sensor Web technologies have been well researched and used for environmental monitoring applications to expose sensor data for analysis in order to provide responsive actions in situations of interest. While these applications provide quick response to situations, to minimize their unwanted effects, research efforts are still necessary to provide techniques that can anticipate the future to support proactive control, such that unwanted situations can be averted altogether...
April 9, 2017: Sensors
https://www.readbyqxmd.com/read/28395317/indoor-air-quality-in-photocopy-centers-nanoparticle-exposures-at-photocopy-workstations-and-the-need-for-exposure-controls
#8
John Martin, Philip Demokritou, Susan Woskie, Dhimiter Bello
Background: Photocopiers emit large amounts of nanoparticles (NP) and are a significant source of indoor air pollution. These emissions induce airway inflammation, irritation, and systemic oxidative stress in humans, lung injury and inflammation in animals, and cytotoxicity and epigenetic modifications in vitro. However, little is known regarding NP exposures at the workstation in the photocopy work environment, or the extent and use of emission controls. Objective: To survey the photocopy work environment with regards to emissions controls and to evaluate IAQ with emphasis on NP exposure at the operator's workstation...
January 1, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28395145/socio-economic-costs-of-indoor-air-pollution-a-tentative-estimation-for-some-pollutants-of-health-interest-in-france
#9
Guillaume Boulanger, Thomas Bayeux, Corinne Mandin, Séverine Kirchner, Benoit Vergriette, Valérie Pernelet-Joly, Pierre Kopp
An evaluation of the socio-economic costs of indoor air pollution can facilitate the development of appropriate public policies. For the first time in France, such an evaluation was conducted for six selected pollutants: benzene, trichloroethylene, radon, carbon monoxide, particles (PM2.5 fraction), and environmental tobacco smoke (ETS). The health impacts of indoor exposure were either already available in published works or were calculated. For these calculations, two approaches were followed depending on the available data: the first followed the principles of quantitative health risk assessment, and the second was based on concepts and methods related to the health impact assessment...
April 7, 2017: Environment International
https://www.readbyqxmd.com/read/28387778/volatile-organic-compounds-concentrations-during-the-construction-process-in-newly-built-timber-frame-houses-source-identification-and-emission-kinetics
#10
H Plaisance, J Vignau-Laulhere, P Mocho, N Sauvat, K Raulin, V Desauziers
Building and furniture materials are known to be major sources of volatile organic compounds (VOCs) indoors. During the construction process, an introduced material can have a more or less long-term impact on the indoor air quality according to the building characteristics. In this study, field measurements were carried out at six construction stages in three energy-efficient timber-frame houses. Data analysis focused on the ten most abundant compounds found among an initial list of fifteen target VOCs, namely formaldehyde, acetaldehyde, hexanal, toluene, m/p-xylenes, ethylbenzene, styrene, α-pinene, 3-carene and d-limonene...
April 7, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28379190/assessment-of-the-indoor-odour-impact-in-a-naturally-ventilated-room
#11
Lidia Eusebio, Marco Derudi, Laura Capelli, Giuseppe Nano, Selena Sironi
Indoor air quality influences people's lives, potentially affecting their health and comfort. Nowadays, ventilation is the only technique commonly used for regulating indoor air quality. CO₂ is the reference species considered in order to calculate the air exchange rates of indoor environments. Indeed, regarding air quality, the presence of pleasant or unpleasant odours can strongly influence the environmental comfort. In this paper, a case study of indoor air quality monitoring is reported. The indoor field tests were conducted measuring both CO₂ concentration, using a photoacoustic multi-gas analyzer, and odour trends, using an electronic nose, in order to analyze and compare the information acquired...
April 5, 2017: Sensors
https://www.readbyqxmd.com/read/28378908/the-effect-of-low-ventilation-rate-with-elevated-bioeffluent-concentration-on-work-performance-perceived-indoor-air-quality-and-health-symptoms
#12
Henna Maula, Valtteri Hongisto, Viivi Naatula, Annu Haapakangas, Hannu Koskela
The aim of this laboratory experiment was to study the effects of ventilation rate, and related changes in air quality, predominantly bioeffluents, on work performance, perceived indoor air quality and health symptoms in a typical conditions of modern open-plan office with low material and equipment emissions. In Condition A, outdoor air flow rate of 28.2 l/s person (CO2 level 540 ppm) was applied and in Condition B, outdoor air flow rate was 2.3 l/s person (CO2 level 2260 ppm). CO2 concentration level was used as an indicator of bioeffluents...
April 5, 2017: Indoor Air
https://www.readbyqxmd.com/read/28378907/advanced-buffer-materials-for-indoor-air-co2-control-in-commercial-buildings
#13
Pavithra Ethi Rajan, Anirudh Krishnamurthy, Glenn Morrison, Fateme Rezaei
In this study, we evaluated solid sorbents for their ability to passively control indoor CO2 concentration in buildings or rooms with cyclic occupancy (e.g. offices, bedrooms). Silica supported amines were identified as suitable candidates and systematically evaluated in the removal of CO2 from indoor air by equilibrium and dynamic techniques. In particular, sorbents with various amine loadings were synthesized using tetraethylenepentamine (TEPA), poly(ethyleneimine) (PEI), and a silane coupling agent 3-aminopropyltriethoxysilane (APS)...
April 5, 2017: Indoor Air
https://www.readbyqxmd.com/read/28376835/indoor-air-pollution-and-its-association-with-poor-lung-function-microalbuminuria-and-variations-in-blood-pressure-among-kitchen-workers-in-india-a-cross-sectional-study
#14
Amarnath Singh, Chandrasekharan Nair Kesavachandran, Ritul Kamal, Vipin Bihari, Afzal Ansari, Parappurath Abdul Azeez, Prem Narain Saxena, Anil Kumar Ks, Altaf Hussain Khan
BACKGROUND: The present study is an attempt to explore the association between kitchen indoor air pollutants and physiological profiles in kitchen workers with microalbuminuria (MAU) in north India (Lucknow) and south India (Coimbatore). METHODS: The subjects comprised 145 control subjects, 233 kitchen workers from north India and 186 kitchen workers from south India. Information related to the personal and occupational history and health of the subjects at both locations were collected using a custom-made questionnaire...
April 4, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28375618/indoor-outdoor-relationships-and-anthropogenic-elemental-signatures-in-airborne-pm2-5-at-a-high-school-impacts-of-petroleum-refining-emissions-on-lanthanoid-enrichment
#15
Ayse Bozlaker, Jordan Peccia, Shankararaman Chellam
Outdoor emissions of primary fine particles and their contributions to indoor air quality deterioration were examined by collecting PM2.5 inside and outside a mechanically ventilated high school in the ultraindustrialized ship channel region of Houston, TX over a 2-month period. By characterizing 47 elements including lanthanoids (rare earth elements), using inductively coupled plasma-mass spectrometry, we captured indoor signatures of outdoor episodic emissions arising from nonroutine operations of petroleum refinery fluidized-bed catalytic cracking units...
April 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28367963/actual-measurement-hygrothermal-response-experiment-and-growth-prediction-analysis-of-microbial-contamination-of-central-air-conditioning-system-in-dalian-china
#16
Yang Lv, Guangyao Hu, Chunyang Wang, Wenjie Yuan, Shanshan Wei, Jiaoqi Gao, Boyuan Wang, Fangchao Song
The microbial contamination of central air conditioning system is one of the important factors that affect the indoor air quality. Actual measurement and analysis were carried out on microbial contamination in central air conditioning system at a venue in Dalian, China. Illumina miseq method was used and three fungal samples of two units were analysed by high throughput sequencing. Results showed that the predominant fungus in air conditioning unit A and B were Candida spp. and Cladosporium spp., and two fungus were further used in the hygrothermal response experiment...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28367475/measuring-vapor-intrusion-from-source-science-politics-to-a-transdisciplinary-approach
#17
Peter C Little, Kelly G Pennell
Investigation of indoor air quality has been on the upswing in recent years. In this article, we focus on how the transport of subsurface vapors into indoor air spaces, a process known as "vapor intrusion," (VI) is defined and addressed. For environmental engineers and physical scientists who specialize in this emerging indoor environmental exposure science, VI is notoriously difficult to characterize, leading the regulatory community to seek improved science-based understandings of VI pathways and exposures...
2017: Environ Sociol
https://www.readbyqxmd.com/read/28360004/outdoor-and-indoor-particle-characterization-from-a-large-and-uncontrolled-combustion-of-a-tire-landfill
#18
B Artíñano, F J Gómez-Moreno, E Díaz, F Amato, M Pandolfi, E Alonso-Blanco, E Coz, S García-Alonso, M Becerril-Valle, X Querol, A Alastuey, B L van Drooge
A large and uncontrolled fire of a tire landfill started in Seseña (Toledo, Spain) on May 13, 2016. An experimental deployment was immediately launched in the area for measuring regulated and non-standard air quality parameters to assess the potential impact of the plume at local and regional levels. Outdoor and indoor measurements of different parameters were carried out at a near school, approximately 700m downwind the burning tires. Real time measurements of ambient black carbon (BC) and total number particle concentrations were identified as good tracers of the smoke plume...
March 27, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28356998/polycyclic-aromatic-hydrocarbons-bound-to-outdoor-and-indoor-airborne-particles-pm2-5-and-their-mutagenicity-and-carcinogenicity-in-silesian-kindergartens-poland
#19
Ewa Błaszczyk, Wioletta Rogula-Kozłowska, Krzysztof Klejnowski, Izabela Fulara, Danuta Mielżyńska-Švach
Assessment of exposure to polycyclic aromatic hydrocarbons (PAHs) is important due to the widespread presence of PAHs in the environment and their toxicological relevance, especially to susceptible populations such as children and their health. The aim of this study is to compare indoor and outdoor concentrations of particulate matter with a diameter of 2.5 μm or less (PM2.5) and 15 individual PAHs, as well as contribution of the analyzed PAHs to mutagenic and carcinogenic activity. Samples were collected during spring season in two sites in southern Poland (Silesia) representing urban and rural areas...
2017: Air Quality, Atmosphere, & Health
https://www.readbyqxmd.com/read/28349881/pm2-5-exposure-in-highly-polluted-cities-a-case-study-from-new-delhi-india
#20
Pallavi Pant, Gazala Habib, Julian D Marshall, Richard E Peltier
Personal exposure (PE) to air pollutants is driven by a combination of pollutant concentrations in indoor and outdoor environments, and time-activity pattern of individuals. The objectives of this study were to estimate personal exposure to PM2.5 and black carbon (BC), and assess the representability of ambient air quality monitoring stations to serve as surrogates for PE in New Delhi. Personal exposure to air pollutants (PM2.5-PE and BCPE) was measured using portable, battery-operated instruments (PM2.5- pDR1500 and BC- microAethalometer AE51) in a small cohort of healthy adults (n=12 in summer, n=6 in winter) with no occupational exposure...
March 24, 2017: Environmental Research
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