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indoor air pollution

Shin Hye Kim, Ji-Woong Choi, Myung-Whan Suh, Jun Ho Lee, Seung-Ha Oh, Jae-Jun Song, Moo Kyun Park
Formaldehyde (FA) is a familiar indoor air pollutant found in everything from cosmetics to clothing, but its impact on the middle ear is unknown. This study investigated whether FA causes cytotoxicity, inflammation, or induction of apoptosis in human middle ear epithelial cells (HMEECs). Cell viability was investigated using the trypan blue assay and a cell counting kit (CCK-8) in HMEECs treated with FA for 4 or 24 h. The expression of genes encoding the inflammatory cytokine tumor necrosis factor alpha (TNF- α ) and mucin (MUC5AC) was analyzed using RT-PCR...
2018: BioMed Research International
Violeta Kaunelienė, Marija Meišutovič-Akhtarieva, Dainius Martuzevičius
With the introduction of novel and potentially less polluting nicotine containing products to the market, the impacts of their usage to indoor air quality as opposed to conventional pollution sources must be reviewed and considered. This review study aimed to comparatively analyse changes in indoor air quality as the consequence of tobacco heating system (THS) generated pollution against general indoor air quality in various micro-environments, especially with combustion-based pollution sources present. Indoor concentrations of formaldehyde, acetaldehyde, benzene, toluene, nicotine and PM2...
May 8, 2018: Chemosphere
Ewa Brągoszewska, Józef S Pastuszka
Numerous studies have focused on occupational and indoor environments because people spend more than 90% of their time in them. Nevertheless, air is the main source of bacteria in indoors, and outdoor exposure is also crucial. Worldwide studies have indicated that bacterial concentrations vary among different types of outdoor environments, with considerable seasonal variations as well. Conducting comprehensive monitoring of atmospheric aerosol concentrations is very important not only for environmental management but also for the assessment of the health impacts of air pollution...
2018: Aerobiologia
Kim Jantzen, Annie Jensen, Ali Kermanizadeh, Grethe Elholm, Torben Sigsgaard, Peter Møller, Martin Roursgaard, Steffen Loft
Ambient air pollution including ozone and especially particulate matter represents important causes of cardiovascular disease. However, there is limited knowledge on indoor air dust with respect to this risk and the potential interactions between dust and ozone. Here, we exposed 23 healthy elderly subjects for 5.5 h, to either clean air, house dust at 275 µg/m3 (diameter < 2.5 µm), ozone at 100 ppb or combined house dust and ozone in a double-blinded randomized cross-over study. The combined house dust and ozone exposure was associated with a 48% (95% CI 24%-65%) decrease as compared with the clean air exposure, in CD34+KDR+ late endothelial progenitor cells (EPCs) per leukocyte in the blood shortly after exposure, whereas none of the single exposures resulted in a significant effect...
May 14, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
Naomi J Paull, Peter J Irga, Fraser R Torpy
Poor air quality is an emerging world-wide problem, with most urban air pollutants arising from vehicular emissions. As such, localized high pollution environments, such as traffic tunnels pose a significant health risk. Phytoremediation, including the use of active (ventilated) green walls or botanical biofilters, is gaining recognition as a potentially effective method for air pollution control. Research to date has tested the capacity of these systems to remove low levels of pollutants from indoor environments...
May 10, 2018: Environmental Pollution
Prabjit Barn, Enkhjargal Gombojav, Chimedsuren Ochir, Bayarkhuu Laagan, Bolor Beejin, Gerel Naidan, Buyantushig Boldbaatar, Jargalsaikhan Galsuren, Tsogtbaatar Byambaa, Craig Janes, Patricia A Janssen, Bruce P Lanphear, Tim K Takaro, Scott A Venners, Glenys M Webster, Weiran Yuchi, Christopher D Palmer, Patrick J Parsons, Young Man Roh, Ryan W Allen
BACKGROUND: Portable HEPA filter air cleaners can reduce indoor fine particulate matter (PM2.5 ), but their use has not been adequately evaluated in high pollution settings. We assessed air cleaner effectiveness in reducing indoor residential PM2.5 and second hand smoke (SHS) exposures among non-smoking pregnant women in Ulaanbaatar, Mongolia. METHODS: We randomized 540 participants to an intervention group receiving 1 or 2 HEPA filter air cleaners or a control group receiving no air cleaners...
February 15, 2018: Science of the Total Environment
Bin Wang, Yibing Zhu, Yiming Pang, Jing Xie, Yongxiu Hao, Huina Yan, Zhiwen Li, Rongwei Ye
Coal combustion and passive smoking are two important contributors to indoor air pollution (IAP) in rural areas of northern China. Although the association between outdoor air pollutants and hypertension risk had been widely reported, fewer studies have examined the relationship between IAP and hypertension risk. This study evaluated the association between IAP and hypertension risk in housewives in rural areas of northern China and the potential mediation pathway of metal elements. Our cross-sectional study, conducted in Shanxi Province, China, enrolled 367 subjects without taking anti-hypertensive drugs, including 142 subjects with hypertension (case group) and 225 subjects without hypertension (control group)...
May 7, 2018: Environmental Pollution
X C Cong, J J Zhao, Z Jing, Q G Wang, P F Ni
Recently, the problem of indoor particulate matter pollution has received much attention. An increasing number of epidemiological studies show that the concentration of atmospheric particulate matter has a significant effect on human health, even at very low concentrations. Most of these investigations have relied upon outdoor particle concentrations as surrogates of human exposures. However, considering that the concentration distribution of the indoor particulate matter is largely dependent on the extent to which these particles penetrate the building and on the degree of suspension in the indoor air, human exposures to particles of outdoor origin may not be equal to outdoor particle concentration levels...
May 9, 2018: Environmental Geochemistry and Health
Wolfram Birmili, Marike Kolossa-Gehring, Kerttu Valtanen, Małgorzata Dębiak, Tunga Salthammer
People in Central Europe spend most of their time in private dwellings, offices, education centres or other public buildings. In these indoor places, they are exposed to a variety of gaseous or particulate pollutants that potentially exert adverse health effects. This work compiles current fields of action that are discussed in the public, among expert panels, and in the scientific community. These address ventilation in buildings, the impact of building product emissions and particulate matter sources on indoor air quality, the detection and prevention of mould as well as the assessment of indoor air quality using guidance values and the determination of the internal exposure by human biomonitoring...
May 8, 2018: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
Graydon Snider, Ellison Carter, Sierra Clark, Joy Tzu Wei Tseng, Xudong Yang, Majid Ezzati, James J Schauer, Christine Wiedinmyer, Jill Baumgartner
BACKGROUND: Decades of intervention programs that replaced traditional biomass stoves with cleaner-burning technologies have failed to meet the World Health Organization (WHO) interim indoor air quality target of 35-μg m-3 for PM2.5 . Many attribute these results to continued use of biomass stoves and poor outdoor air quality, though the relative impacts of these factors have not been empirically quantified. METHODS: We measured 496 days of real-time stove use concurrently with outdoor and indoor air pollution (PM2...
May 4, 2018: Environment International
Jianqiang Sun, Ying Xu, Huabiao Zhou, Anping Zhang, Hong Qi
In this work, sixteen novel brominated flame retardants (NBFRs) and Dechlorane Plus (DP) were investigated in dust samples collected from different indoor environments (home, office, laboratory, classroom and dormitory) in Hangzhou, China. High detection frequencies for most of the congeners were observed, suggesting the widespread use of NBFRs and DP. The mean concentrations of ∑16 NBFRs were 389ngg-1 in the home dust, 1125ngg-1 in the office dust, 204ngg-1 in the laboratory dust, 259ngg-1 in the classroom dust, and 825ngg-1 in the dormitory dust...
August 1, 2018: Science of the Total Environment
Donghai Liang, Rachel Golan, Jennifer L Moutinho, Howard H Chang, Roby Greenwald, Stefanie E Sarnat, Armistead G Russell, Jeremy A Sarnat
Near-road monitoring creates opportunities to provide direct measurement on traffic-related air pollutants and to better understand the changing near-road environment. However, how such observations represent traffic-related air pollution exposures for estimating adverse health effect in epidemiologic studies remains unknown. A better understanding of potential exposure measurement error when utilizing near-road measurement is needed for the design and interpretation of the many observational studies linking traffic pollution and adverse health...
May 1, 2018: Environmental Research
M Velázquez-Gómez, E Hurtado-Fernández, S Lacorte
In the last decades, there has been an increasing concern about the human exposure to indoor dust because it has been observed that its contact or ingestion represents an important exposure source to several contaminants. The principal aim of this study was to evaluate the presence of multi pollutants in indoor dust. Therefore, an efficient multi-residue analytical method based on gas chromatography-electron ionisation-tandem mass spectrometry (GC-EI-MS/MS) was developed for the quantitative determination of 59 pollutants in house dust...
April 24, 2018: Science of the Total Environment
Lidia Morawska, Phong K Thai, Xiaoting Liu, Akwasi Asumadu-Sakyi, Godwin Ayoko, Alena Bartonova, Andrea Bedini, Fahe Chai, Bryce Christensen, Matthew Dunbabin, Jian Gao, Gayle S W Hagler, Rohan Jayaratne, Prashant Kumar, Alexis K H Lau, Peter K K Louie, Mandana Mazaheri, Zhi Ning, Nunzio Motta, Ben Mullins, Md Mahmudur Rahman, Zoran Ristovski, Mahnaz Shafiei, Dian Tjondronegoro, Dane Westerdahl, Ron Williams
Over the past decade, a range of sensor technologies became available on the market, enabling a revolutionary shift in air pollution monitoring and assessment. With their cost of up to three orders of magnitude lower than standard/reference instruments, many avenues for applications have opened up. In particular, broader participation in air quality discussion and utilisation of information on air pollution by communities has become possible. However, many questions have been also asked about the actual benefits of these technologies...
April 25, 2018: Environment International
Aarón Salinas-Rodríguez, Julián Alfredo Fernández-Niño, Betty Manrique-Espinoza, Grea Litai Moreno-Banda, Ana Luisa Sosa-Ortiz, Zhengmin Min Qian, Hualiang Lin
BACKGROUND: Recent epidemiological research has shown that exposure to fine particulate pollution (PM2.5 ) is associated with a reduction in cognitive function in older adults. However, primary evidence comes from high-income countries, and no specific studies have been conducted in low and middle-income countries where higher air pollution levels exist. OBJECTIVES: To estimate the association between the exposure to PM2.5 and cognitive function in a nationally representative sample of older Mexican adults and the associated effect modifiers...
April 25, 2018: Environment International
Ines Gonzalez-Casanova, Aryeh D Stein, Albino Barraza-Villarreal, Raquel Garcia Feregrino, Ann DiGirolamo, Leticia Hernandez-Cadena, Juan A Rivera, Isabelle Romieu, Usha Ramakrishnan
BACKGROUND: Prenatal exposure to environmental pollutants such as mold, lead, pesticides, tobacco, and air pollutants has been suggested to impair cognitive development. Evidence is needed from longitudinal studies to understand their joint impact on child development across time. OBJECTIVE: To study associations between exposure to indoor environmental pollutants or outdoor air pollution during pregnancy and offspring cognitive development trajectories through 7 years...
April 22, 2018: International Journal of Hygiene and Environmental Health
Shweta Arora, S K Rasania, D Bachani, Asha Gandhi, S K Chhabra
Background: Household and ambient air pollution are jointly responsible for about 7 million premature deaths annually. Women living in slums, with unhealthy environment, both indoors and outdoors, particularly those living close to industrial and/or vehicular pollution zones due to multiple sources of air pollution, are at the higher risk of having impaired lung function tests. Objective: The aim of this study was to estimate the prevalence of abnormal lung functions and to identify the environmental risk factors associated with them among adult women of 18-59 years...
May 2018: Lung India: Official Organ of Indian Chest Society
Jeroen van Walsem, Jelle Roegiers, Bart Modde, Silvia Lenaerts, Siegfried Denys
This work is focused on an in-depth experimental characterization of multi-tube reactors for indoor air purification integrated in ventilation systems. Glass tubes were selected as an excellent photocatalyst substrate to meet the challenging requirements of the operating conditions in a ventilation system in which high flow rates are typical. Glass tubes show a low-pressure drop which reduces the energy demand of the ventilator, and additionally, they provide a large exposed surface area to allow interaction between indoor air contaminants and the photocatalyst...
April 24, 2018: Environmental Science and Pollution Research International
Gonçalo Marques, Cristina Roque Ferreira, Rui Pitarma
Occupational health can be strongly influenced by the indoor environment as people spend 90% of their time indoors. Although indoor air quality (IAQ) is not typically monitored, IAQ parameters could be in many instances very different from those defined as healthy values. Particulate matter (PM), a complex mixture of solid and liquid particles of organic and inorganic substances suspended in the air, is considered the pollutant that affects more people. The most health-damaging particles are the &le;PM10 (diameter of 10 microns or less), which can penetrate and lodge deep inside the lungs, contributing to the risk of developing cardiovascular and respiratory diseases, as well as of lung cancer...
April 21, 2018: International Journal of Environmental Research and Public Health
Ipsita Das, Joseph Pedit, Sudhanshu Handa, Pamela Jagger
Exposure to household air pollution (HAP) from cooking and heating with solid fuels is major risk factor for morbidity and mortality in sub-Saharan Africa. Children under five are particularly at risk for acute lower respiratory infection. We use baseline data from randomized controlled trial evaluating a household energy intervention in Gisenyi, Rwanda to investigate the role of the microenvironment as a determinant of children's HAP-related health symptoms. Our sample includes 529 households, with 694 children under five...
2018: Environmental Research Letters: ERL [Web Site]
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