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no2 air pollution

Xi Zhou, Tingjun Zhang, Zhongqin Li, Yan Tao, Feiteng Wang, Xin Zhang, Chunhai Xu, Shan Ma, Ju Huang
Airborne pollutant characteristics, potential sources, and variation trends of cause are investigated based on the hourly air concentrations of gaseous pollutants and particulate matter from 2013 to 2016 in Lanzhou. The mean concentration of SO2 , NO2 , CO, 8-hO3 , PM2.5 , and PM10 was 25.2 ± 16.0 μg m-3 , 46.5 ± 21.1 μg m-3 , 1.3 ± 0.7 mg m-3 , 77.8 ± 45.5 μg m-3 , 58.7 ± 32.9 μg m-3 , and 131.1 ± 86.2 μg m-3 , respectively. The concentrations of SO2 , PM10 , and PM2...
March 20, 2018: Environmental Science and Pollution Research International
Azizallah Dehghan, Narges Khanjani, Abbas Bahrampour, Gholamreza Goudarzi, Masoud Yunesian
BACKGROUND: Some epidemiological evidence has shown a relation between ambient air pollution and adverse health outcomes. The aim of this study was to investigate the effect of air pollution on mortality from respiratory diseases in Tehran, Iran. METHODS: In this ecological study, air pollution data was inquired from the Tehran Province Environmental Protection Agency and the Tehran Air Quality Control Company. Meteorological data was collected from the Tehran Meteorology Organization and mortality data from the Tehran Cemetery Mortality Registration...
March 20, 2018: BMC Pulmonary Medicine
Xiaowei Cong, Xijin Xu, Long Xu, Minghui Li, Cheng Xu, Qilin Qin, Xia Huo
Air pollution is a risk factor for cardiovascular disease (CVD), and cardiovascular regulatory changes in childhood contribute to the development and progression of cardiovascular events at older ages. The aim of the study was to investigate the effect of air pollutant exposure on the child sympatho-adrenomedullary (SAM) system, which plays a vital role in regulating and controlling the cardiovascular system. Two plasma biomarkers (plasma epinephrine and norepinephrine) of SAM activity and heart rate were measured in preschool children (n = 228) living in Guiyu, and native (n = 104) and non-native children (n = 91) living in a reference area (Haojiang) for >1 year...
March 17, 2018: Environment International
Ge Li, Baodong Wang, Wayne Qiang Xu, Yonglong Li, Yifan Han, Qi Sun
Nitrogen oxides (NOx ) and sulfur dioxide (SO2 ) are major air pollutants, so simultaneously removing them from gases emitted during fossil fuel combustion in stationary systems is important. Wet denitrification using urea is used for a wide range of systems. Additives have strong effects on wet denitrification using urea, and different mechanisms are involved and different effects found using different additives. In this study, the effects of different additives, initial urea concentrations, reaction temperatures, initial pH values, gas flow rates, and reaction times on the simultaneous desulfurization and denitrification efficiencies achieved using wet denitrification using urea were studied in single factor experiment...
March 20, 2018: Environmental Technology
O Naughton, A Donnelly, P Nolan, F Pilla, B D Misstear, B Broderick
Estimating pollutant concentrations at a local and regional scale is essential in environmental and health policy decision making. Here we present a novel land use regression (LUR) modelling methodology that exploits the high temporal resolution of fixed-site monitoring (FSM) to produce a national-scale air quality model for the key pollutant NO2 . The methodology partitions concentration time series from a national FSM network into wind-dependent sectors or "wedges". A LUR model is derived using predictor variables calculated within the directional wind sectors, and compared against the long-term average concentrations within each sector...
March 2, 2018: Science of the Total Environment
Wayne R Lawrence, Mo Yang, Shao Lin, Si-Quan Wang, Yimin Liu, Huimin Ma, Duo-Hong Chen, Bo-Yi Yang, Xiao-Wen Zeng, Li-Wen Hu, Guang-Hui Dong
The effect of ambient air pollution exposure on childhood hypertension has emerged as a concern in China, and previous studies suggested pet ownership is associated with lower blood pressure (BP). However, limited information exists on the interactive effects pet ownership and air pollution exposure has on hypertension. We investigated the interactions between exposure to pet ownership and air pollutants on hypertension in Chinese children. 9354 students in twenty-four elementary and middle schools (aged 5-17 years) in Northeastern China were evaluated during 2012-2013...
March 16, 2018: Environmental Pollution
A Travaglini, S Masieri, C Cavaliere, M A Brighetti
Allergies caused by inhalant allergens, particularly pollens, are steadily increasing in urban centers. It is known that atmospheric pollution is strongly related to the inflammatory disease of the upper and lower airways but it is equally important in the development of sensitization towards pollens. Particulate Matter (PM), sulfur dioxide (SO2) and nitrogen dioxide (NO2) have an enhancement function on the persistence of pollens in the air, increasing the concentration and duration of pollinosis. It is therefore essential to use air quality control methods in urban centers to monitor the presence of pollen and fine dust that can drive the doctor and the patient to improve prevention, a step of primary importance in the treatment of allergies...
January 2018: Journal of Biological Regulators and Homeostatic Agents
Yifeng Xue, Yong Wang, Xuefeng Li, Hezhong Tian, Lei Nie, Xiaoqing Wu, Junrui Zhou, Zhen Zhou
The mass concentration and major chemical components of fine particulate matter were measured before, during and after Beijing's massive parade commemorating 70th anniversary of the Chinese Victory in World War II on September 3, 2015. Regional emission inventory, positive matrix factorization (PMF), observations from space and backward air mass trajectories were jointly applied to identify the major pollution sources and their temporal and spatial variations. The contributions of emissions variations and the meteorological conditions related to the "parade blue" phenomenon in Beijing and its surrounding areas were investigated in detail...
March 2018: Journal of Environmental Sciences (China)
Yu Zhan, Yuzhou Luo, Xunfei Deng, Kaishan Zhang, Minghua Zhang, Michael L Grieneisen, Baofeng Di
A novel model named random-forest-spatiotemporal-kriging (RF-STK) was developed to estimate the daily ambient NO2 concentrations across China during 2013-2016 based on the satellite retrievals and geographic covariates. The RF-STK model showed good prediction performance, with cross-validation R2=0.62 (RMSE=13.3 µg/m3) for daily and R2=0.73 (RMSE=6.5 µg/m3) for spatial predictions. The nationwide population-weighted multiyear average of NO2 was predicted to be 30.9±11.7 µg/m3 (mean±standard deviation), with a slowly but significantly decreasing trend at a rate of -0...
March 16, 2018: Environmental Science & Technology
Ali Abdolahnejad, Negar Jafari, Amir Mohammadi, Mohammad Miri, Yaghoub Hajizadeh
Background: The presence of air pollutants such as CO, NO2 , SO2 , O3 , and PM in the ambient air mainly emitted from fossil fuels combustion has become a major health concern. The aims of this study were to estimate the attribution of NO2 , SO2 , and O3 in the premature deaths and prevalence of cardiovascular and respiratory diseases in Isfahan in 2013-2014. Methods: In this study, short-term health effects (total mortality, cardiovascular and respiratory mortality, chronic obstructive pulmonary disease, and acute myocardial infarction) of exposure NO2 , SO2 , and O3 on the population of Isfahan were assessed using AirQ 2...
2018: International Journal of Preventive Medicine
Weize Song, Haifeng Jia, Zhilin Li, Deliang Tang
Urban air pollutant distribution is a concern in environmental and health studies. Particularly, the spatial distribution of NO2 and PM2.5 , which represent photochemical smog and haze pollution in urban areas, is of concern. This paper presents a study quantifying the seasonal differences between urban NO2 and PM2.5 distributions in Foshan, China. A geographical semi-variogram analysis was conducted to delineate the spatial variation in daily NO2 and PM2.5 concentrations. The data were collected from 38 sites in the government-operated monitoring network...
March 11, 2018: Science of the Total Environment
Sheryl Magzamen, Assaf P Oron, Emily R Locke, Vincent S Fan
BACKGROUND: Studies have linked ambient air pollution to chronic obstructive pulmonary disease (COPD) healthcare encounters. However, the association between air quality and rescue medication use is unknown. OBJECTIVES: We assessed the role of air pollution exposure for increased short-acting beta-2-agonist (SABA) use in patients with COPD through use of remote monitoring technology. METHODS: Participants received a portable electronic inhaler sensor to record the date, time and location for SABA use over a 3-month period...
March 13, 2018: Occupational and Environmental Medicine
Dan Norbäck, Chan Lu, Juan Wang, Yinping Zhang, Baizhan Li, Zhuohui Zhao, Chen Huang, Xin Zhang, Hua Qian, Yuexia Sun, Jan Sundell, Qihong Deng
BACKGROUND: Few data exist on asthma and rhinitis across China in relation to indoor and outdoor air pollution, climate and socioeconomic factors. The main aim was to study associations between asthma, rhinitis and current respiratory symptoms among pre-school children across China and selected indoor and outdoor exposure and indicators of socio-economic status (SES) in mutually adjusted models. METHODS: Chinese children (3-6 yr.) (n = 39,782) were recruited from randomly selected day care centres in seven cities in China...
March 9, 2018: Environment International
Lucy Chambers, Joanne Finch, Karen Edwards, Antoine Jeanjean, Roland Leigh, Sherif Gonem
BACKGROUND: There is evidence that air pollution increases the risk of asthma hospitalisations and healthcare utilisation, but the effects on day-to-day asthma control are not fully understood. OBJECTIVE: We undertook a prospective single-centre panel study to test the hypothesis that personal air pollution exposure is associated with asthma symptoms, lung function and airway inflammation. METHODS: Thirty-two patients with a clinical diagnosis of asthma were provided with a personal air pollution monitor (Cairclip NO2 /O3 ) which was kept on or around their person throughout the 12-week follow-up period...
March 11, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
Sui Zhu, Lan Xia, Jianlin Wu, Shaobing Chen, Fei Chen, Fangfang Zeng, Xiuwei Chen, Chuang Chen, Yong Xia, Xing Zhao, Juying Zhang
Although a few studies have analyzed the associations between ambient air pollutants and the development of tuberculosis (TB), most have been conducted in the core countries with inconsistent results. In this study, we used a distributed lag non-linear model to investigate the associations between the newly diagnosed TB cases and daily exposure to particulate matter with an aerodynamic diameter of <10μm (PM10 ), nitrogen dioxide (NO2 ), and sulfur dioxide (SO2 ) in Chengdu, a severely polluted city. There were 36,108 newly diagnosed active TB cases from January 1, 2010 to December 31, 2015 in Chengdu...
March 7, 2018: Science of the Total Environment
Jing Huang, Guoxing Li, Xujun Qian, Guozhang Xu, Yan Zhao, Jian Huang, Qichen Liu, Tianfeng He, Xinbiao Guo
OBJECTIVE: Air pollution is considered one of the most important risk factors for ischemic heart disease (IHD), which is a major public health concern. The disease burden of IHD has continued to rise in China in the past two decades. However, epidemiological studies examining the associations between air pollution and IHD have been scarce in China, and the only studies were conducted in severe air pollution areas, where air pollution levels seriously exceed the World Health Organization Air Quality Guidelines...
March 7, 2018: Environmental Research
Yutong Cai, Susan Hodgson, Marta Blangiardo, John Gulliver, David Morley, Daniela Fecht, Danielle Vienneau, Kees de Hoogh, Tim Key, Kristian Hveem, Paul Elliott, Anna L Hansell
BACKGROUND: This study aimed to investigate the effects of long-term exposure to road traffic noise and air pollution on incident cardiovascular disease (CVD) in three large cohorts: HUNT, EPIC-Oxford and UK Biobank. METHODS: In pooled complete-case sample of the three cohorts from Norway and the United Kingdom (N = 355,732), 21,081 incident all CVD cases including 5259 ischemic heart disease (IHD) and 2871 cerebrovascular cases were ascertained between baseline (1993-2010) and end of follow-up (2008-2013) through medical record linkage...
March 5, 2018: Environment International
Marnie F Hazlehurst, Elizabeth W Spalt, Tyler P Nicholas, Cynthia L Curl, Mark E Davey, Gregory L Burke, Karol E Watson, Sverre Vedal, Joel D Kaufman
Exposure estimates that do not account for time in-transit may underestimate exposure to traffic-related air pollution, but exact contributions have not been studied directly. We conducted a 2-week monitoring, including novel in-vehicle sampling, in a subset of the Multi-Ethnic Study of Atherosclerosis and Air Pollution cohort in two cities. Participants spent the majority of their time indoors and only 4.4% of their time (63 min/day) in-vehicle, on average. The mean ambient-source NO2 concentration was 5...
March 6, 2018: Journal of Exposure Science & Environmental Epidemiology
Se Ji Jung, Jodhbir Mehta, Louis Tong
The twenty-first century is fraught with dangers like climate change and pollution, which impacts human health and mortality. As levels of pollution increase, respiratory illnesses and cardiovascular ailments become more prevalent. Less understood are the eye-related complaints, which are commonly associated with increasing pollution. Affected people may complain of irritation, redness, foreign body sensation, tearing, and blurring of vision. Sources of pollution are varied, ranging from gases (such as ozone and NO2 ) and particulate matter produced from traffic, to some other hazards associated with indoor environments...
March 3, 2018: Ocular Surface
Hyun-Jin Kim, Jin-Young Min, Yong-Seok Seo, Kyoung-Bok Min
Background: Ambient air pollution has a negative effect on many diseases, such as cardiovascular and respiratory diseases. Recent studies have reported a relationship between air pollution and renal function, but the results were limited to exposure to particulate matter (PM). This study was to identify associations between various air pollutants and renal function among Korean adults. Methods: Nationwide survey data for a total of 24,407 adults were analyzed. We calculated the estimated glomerular filtration rate (eGFR) for each individual to assess their renal function and used this to categorize those with chronic kidney disease (CKD)...
2018: Annals of Occupational and Environmental Medicine
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