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Indoor air quality

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https://www.readbyqxmd.com/read/28319817/indoor-air-quality-of-low-and-middle-income-urban-households-in-durban-south-africa
#1
Nkosana Jafta, Lars Barregard, Prakash M Jeena, Rajen N Naidoo
INTRODUCTION: Elevated levels of indoor air pollutants may cause cardiopulmonary disease such as lower respiratory infection, chronic obstructive lung disease and lung cancer, but the association with tuberculosis (TB) is unclear. So far the risk estimates of TB infection or/and disease due to indoor air pollution (IAP) exposure are based on self-reported exposures rather than direct measurements of IAP, and these exposures have not been validated. OBJECTIVE: The aim of this paper was to characterize and develop predictive models for concentrations of three air pollutants (PM10, NO2 and SO2) in homes of children participating in a childhood TB study...
March 15, 2017: Environmental Research
https://www.readbyqxmd.com/read/28288421/evaluating-the-impact-of-ambient-benzene-vapor-concentrations-on-product-water-from-condensation-water-from-air-technology
#2
Katherine M Kinder, Christopher A Gellasch, James S Dusenbury, Thomas C Timmes, Thomas M Hughes
Globally, drinking water resources are diminishing in both quantity and quality. This situation has renewed interest in Condensation Water From Air (CWFA) technology, which utilizes water vapor in the air to produce water for both potable and non-potable purposes. However, there are currently insufficient data available to determine the relationship between air contaminants and the rate at which they are transferred from the air into CWFA untreated product water. This study implemented a novel experimental method utilizing an environmental test chamber to evaluate how air quality and temperature affects CWFA untreated product water quality in order to collect data that will inform the type of water treatment required to protect human health...
March 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28284941/scientific-production-on-indoor-air-quality-of-environments-used-for-physical-exercise-and-sports-practice-bibliometric-analysis
#3
REVIEW
Alexandro Andrade, Fábio Hech Dominski, Danilo Reis Coimbra
INTRODUCTION: In order to minimize adverse health effects and increase the benefits of physical activity, it is important to systematize indoor air quality study in environments used for physical exercise and sports. OBJECTIVES: To investigate and analyze the scientific production related to indoor air quality of environments used for physical exercise and sports practice through a bibliometric analysis. METHODS: The databases Scielo, Science Direct, Scopus, Lilacs, Medline via Pubmed, and SportDiscus were searched from their inception to March 2016...
March 9, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28281141/oxidative-potential-op-and-mineralogy-of-iron-ore-particulate-matter-at-the-gol-e-gohar-mining-and-industrial-facility-iran
#4
Naghmeh Soltani, Behnam Keshavarzi, Armin Sorooshian, Farid Moore, Christina Dunster, Ana Oliete Dominguez, Frank J Kelly, Prakash Dhakal, Mohamad Reza Ahmadi, Sina Asadi
Concentrations of total suspended particulate matter, particulate matter with aerodynamic diameter <2.5 μm (PM2.5), particulate matter <10 μm (PM10), and fallout dust were measured at the Iranian Gol-E-Gohar Mining and Industrial Facility. Samples were characterized in terms of mineralogy, morphology, and oxidative potential. Results show that indoor samples exceeded the 24-h PM2.5 and PM10 mass concentration limits (35 and 150 µg m(-3), respectively) set by the US National Ambient Air Quality Standards...
March 9, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28273596/challenges-in-estimating-health-effects-of-indoor-exposures-to-outdoor-particles-considerations-for-regional-differences
#5
Otto Hänninen, Isabell Rumrich, Arja Asikainen
Ambient air pollution is a leading environmental risk factor causing substantial losses of life and significant morbidity. Concentration-response (CR) functions used globally to estimate such effects are largely based on ambient epidemiology, using centrally monitored outdoor air quality as an exposure indicator and various indices of population health as an outcome. Similar common understanding is mostly missing regarding indoor exposures. Less studied are health impact modifying factors such as particle size, infiltration, time-activity and population differences...
March 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28267233/kerosene-lighting-contributes-to-household-air-pollution-in-rural-uganda
#6
D Muyanja, J G Allen, J Vallarino, L Valeri, B Kakuhikire, D R Bangsberg, D C Christiani, A C Tsai, P S Lai
The literature on the contribution of kerosene lighting to indoor air particulate concentrations is sparse. In rural Uganda, kitchens are almost universally located outside the main home, and kerosene is often used for lighting. In this study, we obtained longitudinal measures of particulate matter 2.5 microns or smaller in size (PM2.5 ) from living rooms and kitchens of 88 households in rural Uganda. Linear mixed effects models with a random intercept for household were used to test the hypotheses that primary reported lighting source and kitchen location (indoor vs...
March 7, 2017: Indoor Air
https://www.readbyqxmd.com/read/28267226/analyzing-symptom-data-in-indoor-air-questionnaires-for-primary-schools
#7
Sari Ung-Lanki, Jussi Lampi, Juha Pekkanen
Questionnaires on symptoms and perceived quality of indoor environment are used to assess indoor environment problems, but mainly among adults. The aim of this article is to explore best ways to analyze and report such symptom data, as part of a project to develop a parent-administered indoor air questionnaire for primary school pupils. Indoor air questionnaire with 25 questions on child's symptoms in the last 4 weeks was sent to parents in 5 primary schools with indoor air problems and in 5 control schools...
March 7, 2017: Indoor Air
https://www.readbyqxmd.com/read/28256313/geochemical-anomalies-of-household-dust-in-an-industrialized-city-huelva-sw-spain
#8
Raquel Torres-Sánchez, Ana María Sánchez de la Campa, María Beltrán, Daniel Sánchez-Rodas, Jesús D de la Rosa
Geochemical anomalies of sulphide like elements (Cu, As and Cd) derived from the industrial activity have been identified in household dust of Huelva (SW Spain) using geochemical maps. Major and trace elements were analysed by ICP-OES and ICP-MS, respectively. Electron images of single particles were analysed by SEM-EDS in order to know their size, shape and composition. The geochemistry of the household dust has been compared to anomalies in deposition particles, PM10 and soils. A zonation has been observed: the eastern part of the city displays higher concentrations of sulphide like elements than the western part, supporting the origin of these elements related to the vicinity of industrial estates (Cu-smelter processes)...
February 27, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28250718/indoor-air-quality-and-asthma-has-unrecognized-exposure-to-acrolein-confounded-results-of-previous-studies
#9
Robert Golden, Stewart Holm
Numerous contaminants in indoor air and their potential to cause or exacerbate asthma continue to be a subject of public health concern. Many agents are causally associated with or can exacerbate asthma, particularly in children. For formaldehyde, an established respiratory irritant based on numerous studies, the evidence for an association with asthma is still considered only limited or suggestive. However, there is no evidence that indicates increased sensitivity to sensory irritation to formaldehyde in people often regarded as susceptible such as asthmatics...
January 2017: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/28236484/characterization-and-source-profiling-of-volatile-organic-compounds-in-indoor-air-of-private-residences-in-selangor-state-malaysia
#10
Nobumitsu Sakai, Shuta Yamamoto, Yasuto Matsui, Md Firoz Khan, Mohd Talib Latif, Mustafa Ali Mohd, Minoru Yoneda
Volatile Organic Compounds (VOCs) in indoor air were investigated at 39 private residences in Selangor State, Malaysia to characterize the indoor air quality and to identify pollution sources. Twenty-two VOCs including isomers (14 aldehydes, 5 aromatic hydrocarbons, acetone, trichloroethylene and tetrachloroethylene) were collected by 2 passive samplers for 24h and quantitated using high performance liquid chromatography and gas chromatography mass spectrometry. Source profiling based on benzene/toluene ratio as well as statistical analysis (cluster analysis, bivariate correlation analysis and principal component analysis) was performed to identify pollution sources of the detected VOCs...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28236201/indoor-air-quality-in-public-utility-environments-a-review
#11
Monika Śmiełowska, Mariusz Marć, Bożena Zabiegała
Indoor air quality has been the object of interest for scientists and specialists from the fields of science such as chemistry, medicine and ventilation system design. This results from a considerable number of potential factors, which may influence the quality of the broadly understood indoor air in a negative way. Poor quality of indoor air in various types of public utility buildings may significantly affect an increase in the incidence of various types of civilisation diseases. This paper presents information about a broad spectrum of chemical compounds that were identified and determined in the indoor environment of various types of public utility rooms such as churches, museums, libraries, temples and hospitals...
February 24, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28230878/multifunctional-hybrid-porous-filters-with-hierarchical-structures-for-simultaneous-removal-of-indoor-vocs-dusts-and-microorganisms
#12
Yang Zhao, Ze-Xian Low, Shasha Feng, Zhaoxiang Zhong, Yong Wang, Zhong Yao
Air purification often requires multiple layers of filters with different functions to remove various air pollutants, which lead to high pressure drop, high air flow path and frequent filter replacement. In this work, a novel multifunctional Ag@MWCNTs/Al2O3 hybrid filter with a depth-type hierarchical structure for simultaneous removal of fine particles, microorganisms and VOCs was designed and fabricated. The novel hybrid air filter showed leading air purification performances to date, achieving 82.24% degradation of formaldehyde at room temperature, 99...
February 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28230812/urban-pollutant-transport-and-infiltration-into-buildings-using-perfluorocarbon-tracers
#13
James C Matthews, Asan Bacak, M Anwar H Khan, Matthew D Wright, Michael Priestley, Damien Martin, Carl J Percival, Dudley E Shallcross
People spend the majority of their time indoors and therefore the quality of indoor air is worthy of investigation; indoor air quality is affected by indoor sources of pollutants and from pollutants entering buildings from outdoors. In this study, unique perfluorocarbon tracers were released in five experiments at a 100 m and ~2 km distance from a large university building in Manchester, UK and tracer was also released inside the building to measure the amount of outdoor material penetrating into buildings and the flow of material within the building itself...
February 21, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28216030/sources-health-effects-and-control-strategies-of-indoor-fine-particulate-matter-pm2-5-a-review
#14
REVIEW
Zhisheng Li, Qingmei Wen, Ruilin Zhang
Indoor air quality is directly influenced by indoor PM2.5. Short-term and long-term exposure of PM2.5 in the micro environment would severely detriment the health of both humans and animals. The researches both at home and abroad dating from 2000 were analyzed and summarized mainly in the following 3 sections: source apportionment, health effects and control methods. Health effects were illustrated in both epidemiology and toxicology. The epidemiology was explicated in morbidity and mortality, the toxicology was illuminated in inflammatory reaction, oxidative stress, genotoxicity, mutagenicity and carcinogenicity...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28215812/indoor-air-pollutants-ventilation-rate-determinants-and-potential-control-strategies-in-chinese-dwellings-a-literature-review
#15
Wei Ye, Xu Zhang, Jun Gao, Guangyu Cao, Xiang Zhou, Xing Su
After nearly twenty years of rapid modernization and urbanization in China, huge achievements have transformed the daily lives of the Chinese people. However, unprecedented environmental consequences in both indoor and outdoor environments have accompanied this progress and have triggered public awareness and demands for improved living standards, especially in residential environments. Indoor pollution data measured for >7000 dwellings (approximately 1/3 were newly decorated and were tested for volatile organic compound (VOC) measurements, while the rest were tested for particles, phthalates and other semi-volatile organic compounds (SVOCs), moisture/mold, inorganic gases and radon) in China within the last ten years were reviewed, summarized and compared with indoor concentration recommendations based on sensory or health end-points...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28214272/fungal-monitoring-of-the-indoor-air-of-the-museo-de-la-plata-herbarium-argentina
#16
Andrea C Mallo, Lorena A Elíades, Daniela S Nitiu, Mario C N Saparrat
BACKGROUND: Biological agents, such as fungal spores in the air in places where scientific collections are stored, can attack and deteriorate them. AIMS: The aim of this study was to gather information on the indoor air quality of the Herbarium of Vascular Plants of the Museo de Ciencias Naturales de La Plata, Argentina, in relation to fungal propagules and inert particles. METHODS: This study was made using a volumetric system and two complementary sampling methods: (1) a non-viable method for direct evaluation, and (2) a viable method by culture for viable fungal propagules...
February 14, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28208905/n-acetylcysteine-combined-with-home-based-physical-activity-effect-on-health-related-quality-of-life-in-stable-copd-patients-a-randomised-controlled-trial
#17
Vijay Tukaram Salve, Jitesh S Atram
INTRODUCTION: Quality of life is adversely affected in Chronic Obstructive Pulmonary Disease (COPD), due to irreversible, progressive nature of the disease and limitations of current treatment options available. One of the important aim of treatment of COPD is to improve Quality of Life (QoL). Cigarette smoke contains numerous free radicals and other oxidants. Oxidative stress has been implicated in pathogenesis, progression of disease and exacerbation in COPD. Pulmonary tuberculosis, outdoor and indoor air pollution and many others are aetiologies of COPD in non-smokers...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28186210/us-residential-building-air-exchange-rates-new-perspectives-to-improve-decision-making-at-vapor-intrusion-sites
#18
Rivka Reichman, Elham Shirazi, Donald G Colliver, Kelly G Pennell
Vapor intrusion (VI) is well-known to be difficult to characterize because indoor air (IA) concentrations exhibit considerable temporal and spatial variability in homes throughout impacted communities. To overcome this and other limitations, most VI science has focused on subsurface processes; however there is a need to understand the role of aboveground processes, especially building operation, in the context of VI exposure risks. This tutorial review focuses on building air exchange rates (AERs) and provides a review of literature related building AERs to inform decision making at VI sites...
February 22, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28169528/the-essential-role-for-laboratory-studies-in-atmospheric-chemistry
#19
James B Burkholder, Jonathan P D Abbatt, Ian Barnes, James M Roberts, Megan L Melamed, Markus Ammann, Allan K Bertram, Christopher D Cappa, Annmarie G Carlton, Lucy J Carpenter, John N Crowley, Yael Dubowski, Christian George, Dwayne E Heard, Hartmut Herrmann, Frank N Keutsch, Jesse H Kroll, V Faye McNeill, Nga Lee Ng, Sergey A Nizkorodov, John J Orlando, Carl J Percival, Bénédicte Picquet-Varrault, Yinon Rudich, Paul W Seakins, Jason D Surratt, Hiroshi Tanimoto, Joel A Thornton, Zhu Tong, Geoffrey S Tyndall, Andreas Wahner, Charles J Weschler, Kevin R Wilson, Paul J Ziemann
Laboratory studies of atmospheric chemistry characterize the nature of atmospherically relevant processes down to the molecular level, providing fundamental information used to assess how human activities drive environmental phenomena such as climate change, urban air pollution, ecosystem health, indoor air quality, and stratospheric ozone depletion. Laboratory studies have a central role in addressing the incomplete fundamental knowledge of atmospheric chemistry. This article highlights the evolving science needs for this community and emphasizes how our knowledge is far from complete, hindering our ability to predict the future state of our atmosphere and to respond to emerging global environmental change issues...
February 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28165398/review-and-extension-of-co%C3%A2-based-methods-to-determine-ventilation-rates-with-application-to-school-classrooms
#20
Stuart Batterman
The ventilation rate (VR) is a key parameter affecting indoor environmental quality (IEQ) and the energy consumption of buildings. This paper reviews the use of CO₂ as a "natural" tracer gas for estimating VRs, focusing on applications in school classrooms. It provides details and guidance for the steady-state, build-up, decay and transient mass balance methods. An extension to the build-up method and an analysis of the post-exercise recovery period that can increase CO₂ generation rates are presented. Measurements in four mechanically-ventilated school buildings demonstrate the methods and highlight issues affecting their applicability...
February 4, 2017: International Journal of Environmental Research and Public Health
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