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https://www.readbyqxmd.com/read/29149737/source-apportionment-of-black-carbon-during-winter-in-beijing
#1
Yue Liu, Caiqing Yan, Mei Zheng
Black carbon (BC) in PM2.5 was measured at an urban site in Beijing during winter 2015 using an aethalometer. The characteristics and sources of BC during pollution episodes and clean days were analyzed. The average hourly mass concentration of BC during the study period was 5.31±6.27μg/m(3). BC was highly correlated with PM2.5 (R(2)=0.80), with its concentration ranging from 0.17μg/m(3) in clean days to 35.33μg/m(3) in haze days. Source apportionment results showed that the average contribution of liquid fuel source (e...
November 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29148928/spatiotemporal-variations-and-relationship-of-pm-and-gaseous-pollutants-based-on-gray-correlation-analysis
#2
Yong Y Zhang, Ying Jia, Ming Li, Li A Hou
The present work characterizes the spatiotemporal variations of air pollution at four sites in Xi'an city. The investigations lasted for 1 year: January 1 through December 31, 2015. The concentrations of CO, NO2, O3, PM and SO2 were systematically monitored. The gray correlation analysis was used to correlate PM2.5 and gaseous pollutants. The formation mechanisms of sulfate and nitrate aerosols were discussed. Results clearly revealed severe air pollution by PM2.5, PM10 and NO2 at all four sites. Significant monthly variations were observed for PM2...
November 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29148736/formation-of-metal-cyanide-complexes-in-deliquescent-airborne-particles-a-new-possible-sink-for-hcn-in-urban-environments
#3
Chiara Giorio, Daniele Marton, Gianni Formenton, Andrea Tapparo
Hydrogen cyanide is a ubiquitous gas in the atmosphere and a biomass burning tracer. Reactive gasses can be adsorbed onto aerosol particles where they can promote heterogeneous chemistry. In the present study, we report for the first time on the measurement and speciation of cyanides in atmospheric aerosol. Filter samples were collected at an urban background site in the city center of Padua (Italy), extracted and analyzed with headspace gas chromatography and nitrogen-phosphorous detection. The results showed that strongly bound cyanides were present in all aerosol samples at a concentration ranging between 0...
November 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29147496/markov-chain-based-acute-effect-estimation-of-air-pollution-on-elder-asthma-hospitalization
#4
Li Luo, Fengyi Zhang, Wei Zhang, Lin Sun, Chunyang Li, Debin Huang, Gao Han, Bin Wang
Background: Asthma caused substantial economic and health care burden and is susceptible to air pollution. Particularly, when it comes to elder asthma patient (older than 65), the phenomenon is more significant. The aim of this study is to investigate the Markov-based acute effects of air pollution on elder asthma hospitalizations, in forms of transition probabilities. Methods: A retrospective, population-based study design was used to assess temporal patterns in hospitalizations for asthma in a region of Sichuan province, China...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29147121/ambient-air-pollution-and-daily-hospital-admissions-for-cardiovascular-diseases-in-arak-iran
#5
Mostafa Vahedian, Narges Khanjani, Moghaddameh Mirzaee, Ali Koolivand
BACKGROUND: Outdoor air pollution has been considered as one of the most serious health concerns over the last decade. This study aimed to investigate the association between ambient air pollution and cardiovascular hospital admissions. METHODS: This investigation was carried out from January 1, 2010 to December 31, 2015, in the urban population of Arak, Iran. Daily records of concentrations of air pollutants including particulate matter less than 10 µm (PM10), nitrogen dioxide (NO2), particulate matter less than 2...
May 2017: ARYA Atherosclerosis
https://www.readbyqxmd.com/read/29145052/a-comparison-of-personal-exposure-to-air-pollutants-in-different-travel-modes-on-national-highways-in-india
#6
Soma Sekhara Rao Kolluru, Aditya Kumar Patra, Satya Prakash Sahu
People often travel a long distance on highways to the nearest city for professional/business activities. However, relatively few publications on passenger exposure to pollutants on highways in India or elsewhere are available. The aim of this study was to examine the contribution of different travel modes to passengers' pollutant exposure for a long distance travel on a national highway in India. We measured PM2.5 and CO exposure levels of the passengers over 200km on a national highway using two portable air monitors, EVM-7 and EPAM-5000...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29142613/surface-data-assimilation-of-chemical-compounds-over-north-america-and-its-impact-on-air-quality-and-air-quality-health-index-aqhi-forecasts
#7
Alain Robichaud
The aim of this paper is to analyze the impact of initializing GEM-MACH, Environment and Climate Change Canada's air quality (AQ) forecast model, with multi-pollutant surface objective analyses (MPSOA). A series of 48-h air quality forecasts were launched for July 2012 (summer case) and January 2014 (winter case) for ozone, NO2, and PM2.5. In this setup, the GEM-MACH model (version 1.3.8.2) was initialized with surface analysis increments (from MPSOA) which were projected in the vertical by applying an appropriate fractional weighting in order to obtain 3D analyses in the lower troposphere...
2017: Air Quality, Atmosphere, & Health
https://www.readbyqxmd.com/read/29142612/trends-and-patterns-of-air-quality-in-santa-cruz-de-tenerife-canary-islands-in-the-period-2011-2015
#8
Jose M Baldasano, Jordi Massagué
Air quality trends and patterns in the coastal city of Santa Cruz de Tenerife (Canary Islands, Spain) for the period 2011-2015 were analyzed. The orographic and meteorological characteristics, the proximity to the African continent, and the influence of the Azores anticyclone in combination with the anthropogenic (oil refinery, road/maritime traffic) and natural emissions create specific dispersion conditions. SO2, NO2, PM10, PM2.5, and O3 pollutants were assessed. The refinery was the primary source of SO2; EU hourly and daily average limit values were exceeded during 2011 and alert thresholds were reached in 2011 and 2012...
2017: Air Quality, Atmosphere, & Health
https://www.readbyqxmd.com/read/29138390/estimation-of-ground-pm2-5-concentrations-using-a-dem-assisted-information-diffusion-algorithm-a-case-study-in-china
#9
Lei Ma, Yu Gao, Tengyu Fu, Liang Cheng, Zhenjie Chen, Manchun Li
When estimating national PM2.5 concentrations, the results of traditional interpolation algorithms are unreliable due to a lack of monitoring sites and heterogeneous spatial distributions. PM2.5 spatial distribution is strongly correlated to elevation, and the information diffusion algorithm has been shown to be highly reliable when dealing with sparse data interpolation issues. Therefore, to overcome the disadvantages of traditional algorithms, we proposed a method combining elevation data with the information diffusion algorithm...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29134799/e-waste-driven-pollution-in-pakistan-the-first-evidence-of-environmental-and-human-exposure-to-flame-retardants-frs-in-karachi-city
#10
Mehreen Iqbal, Jabir Hussain Syed, Knut Breivik, Muhammad Jamshed Iqbal Chaudhry, Jun Li, Gan Zhang, Riffat Naseem Malik
Informal e-waste recycling activities have been shown to be a major emitter of organic flame retardants (FRs), contributing to both environmental and human exposure to laborers at e-waste recycling sites in some West African countries, as well as in China and India. The main objective of this study was to determine the levels of selected organic FRs in both air and soil samples collected from areas with intensive informal e-waste recycling activities in Karachi, Pakistan. Dechlorane Plus (DP) and "novel" brominated flame retardants (NBFRs) were often detected in high concentrations in soils, while phosphorous-based FRs (OPFRs) dominated atmospheric samples...
November 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29134522/capacity-of-six-shrub-species-to-retain-atmospheric-particulates-with-different-diameters
#11
Xiaodan Sun, Haimei Li, Xiao Guo, Yingkun Sun, Shimei Li
Garden plants can absorb and retain atmospheric particles and are important for remediating environmental pollution. In this study, the dust retention characteristics of six typical shrub species were measured in the greenbelt of a road in the Chengyang District of Qingdao, China, and the maximum capacity for dust retention of each species was determined. The different diameters and areas occupied by particulate matter (PM) were analyzed on the leaf surfaces of the plants. Based on the results for the six shrub species, the rank order of average content of dust retention per unit leaf area was Euonymus japonicus > Pyracantha fortuneana > Ligustrum vicaryi > Amygdalus triloba > Ligustrum sinense > Forsythia suspensa, whereas the rank order of average content per unit volume was E...
November 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29134287/particulate-matter-levels-in-a-south-american-megacity-the-metropolitan-area-of-lima-callao-peru
#12
Jose Silva, Jhojan Rojas, Magdalena Norabuena, Carolina Molina, Richard A Toro, Manuel A Leiva-Guzmán
The temporal and spatial trends in the variability of PM10 and PM2.5 from 2010 to 2015 in the metropolitan area of Lima-Callao, Peru, are studied and interpreted in this work. The mean annual concentrations of PM10 and PM2.5 have ranges (averages) of 133-45 μg m(-3) (84 μg m(-3)) and 35-16 μg m(-3) (26 μg m(-3)) for the monitoring sites under study. In general, the highest annual concentrations are observed in the eastern part of the city, which is a result of the pattern of persistent local winds entering from the coast in a south-southwest direction...
November 13, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29133855/effect-of-short-term-exposure-to-ambient-air-particulate-matter-on-incidence-of-delirium-in-a-surgical-population
#13
Lu Che, Yan Li, Cheng Gan
Delirium remains an independent risk factor for morbidity and mortality among older surgical adults. Recent research has shed light on the relationship between pollution and dementia, yet little is known about the health impacts of particulate matter (PM) on delirium. Therefore, we aim to further explore association of PM and delirium among surgical population. We conducted a time-stratified case-crossover study. Electronic hospitalization summary reports derived from 26 major cities in China between 1 January 2014 and 31 December 2015 were used...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133596/exposure-to-ambient-fine-particulate-matter-and-semen-quality-in-taiwan
#14
Xiang Qian Lao, Zilong Zhang, Alexis Kh Lau, Ta-Chien Chan, Yuan Chieh Chuang, Jimmy Chan, Changqing Lin, Cui Guo, Wun Kai Jiang, Tony Tam, Gerard Hoek, Haidong Kan, Eng-Kiong Yeoh, Ly-Yun Chang
OBJECTIVES: Environmental exposure to chemicals has been considered a potential factor contributing to deteriorated semen quality. However, previous literature on exposure to air pollution and semen quality is inconsistent. We therefore investigated the health effects of short-term and long-term exposure to fine particulate matter (PM2.5) on semen quality in Taiwanese men from the general population. METHODS: A cross-sectional study was conducted among 6475 male participants aged 15-49 years who participated in a standard medical examination programme in Taiwan between 2001 and 2014...
November 13, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29132719/a-multidimensional-comparison-between-modis-and-viirs-aod-in-estimating-ground-level-pm2-5-concentrations-over-a-heavily-polluted-region-in-china
#15
Fei Yao, Menglin Si, Weifeng Li, Jiansheng Wu
Satellite-derived aerosol optical depth (AOD) has been proven effective for estimating ground-level particles with an aerodynamic diameter <2.5μm (PM2.5) concentrations. Using a time fixed effects regression model, we compared the capacity of two AOD sources, Moderate Resolution Imaging Spectroradiometer (MODIS) and Visible Infrared Imaging Radiometer Suite (VIIRS), to estimate ground-level PM2.5 concentrations over a heavily polluted region in China. Regarding high-quality AOD data, the results show that the VIIRS model performs better than the MODIS model with respect to all model accuracy evaluation indexes (e...
November 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29128246/long-term-exposure-to-ambient-pm2-5-associated-with-fall-related-injury-in-six-low-and-middle-income-countries
#16
Yanfei Guo, Hualiang Lin, Yan Shi, Yang Zheng, Xing Li, Jianpeng Xiao, Tao Liu, Weilin Zeng, Michael G Vaughn, Lenise A Cummings-Vaughn, Erik J Nelson, Zhengmin Min Qian, Wenjun Ma, Fan Wu
Exposure to ambient air pollution has been linked with adverse health outcomes of the circulatory and nervous systems. Given that falls are closely related to circulatory and nervous health, we hypothesize that air pollution may adversely affect fall-related injury. We employed Wave 1 data from 36,662 participants aged ≥50 years in WHO's Study on Global AGEing and Adult Health in six low- and middle-income countries. Ambient annual concentration of PM2.5 was estimated using satellite data. A three-level logistic regression model was applied to examine the long-term association between ambient PM2...
November 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29127869/trans-boundary-air-pollution-in-a-city-under-various-atmospheric-conditions
#17
Ming Luo, Xiangting Hou, Yefu Gu, Ngar-Cheung Lau, Steve Hung-Lam Yim
Trans-boundary air pollution (TAP) is a crucial factor affecting air quality, and its contribution may vary over time and differ under various atmospheric conditions. This study firstly applies an integrated statistical scheme to estimate the contributions of TAP and local sources to air pollutants in a city, and then investigate the influences of tropical cyclones (TC) on TAP. Hong Kong is chosen as an example because of its significant and special TAP characteristics. This study focuses on four major air pollutants, namely, respirable and fine suspended particulates (RSP/PM10 and FSP/PM2...
November 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29127795/an-investigation-of-the-leaf-retention-capacity-efficiency-and-mechanism-for-atmospheric-particulate-matter-of-five-greening-tree-species-in-beijing-china
#18
Jinqiang Liu, Zhiguo Cao, Songyan Zou, Huanhuan Liu, Xiao Hai, Shihua Wang, Jie Duan, Benye Xi, Guangxuan Yan, Shaowei Zhang, Zhongkui Jia
Urban trees have the potential to reduce air pollution, but the retention capacity and efficiency of different tree species for atmospheric particulate matter (PM) accumulation and the underlying mechanism hasn't been well understood. To select tree species with high air purification abilities, the supplementing ultrasonic cleaning (UC) procedure was first introduced into the conventional leaf cleaning methods [single water cleaning (WC) or plus brush cleaning (BC)] for eluting the leaf-retained PM. Further updates to the methodology were applied to investigate the retention capacity, efficiency, and mechanism for PM of five typical greening tree species in Beijing, China...
November 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29127390/indoor-pm2-5-exposure-affects-skin-aging-manifestation-in-a-chinese-population
#19
Anan Ding, Yajun Yang, Zhuohui Zhao, Anke Hüls, Andrea Vierkötter, Ziyu Yuan, Jing Cai, Juan Zhang, Wenshan Gao, Jinxi Li, Manfei Zhang, Mary Matsui, Jean Krutmann, Haidong Kan, Tamara Schikowski, Li Jin, Sijia Wang
Traffic-related air pollution is known to be associated with skin aging manifestations. We previously found that the use of fossil fuels was associated with skin aging, but no direct link between indoor air pollutants and skin aging manifestations has ever been shown. Here we directly measured the indoor PM2.5 exposure in 30 households in Taizhou, China. Based on the directly measured PM2.5 exposure and questionnaire data of indoor pollution sources, we built a regression model to predict the PM2.5 exposure in larger datasets including an initial examination group (N = 874) and a second examination group (N = 1003)...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29126095/characterizing-isotopic-compositions-of-tc-c-no3-n-and-nh4-n-in-pm2-5-in-south-korea-impact-of-china-s-winter-heating
#20
Yu-Mi Park, Kwang-Su Park, Hyuk Kim, Seok-Min Yu, Seam Noh, Min-Seob Kim, Jee-Young Kim, Joon-Young Ahn, Min-do Lee, Kwang-Seol Seok, Young-Hee Kim
The origin of PM2.5 has long been the subject of debate and stable isotopic tools have been applied to decipher. In this study, weekly PM2.5 samples were simultaneously collected at an urban (Seoul) and rural (Baengnyeong Island) site in Korea from January 2014 through February 2016. The seasonal variation of isotopic species showed significant seasonal differences with sinusoidal variation. The isotopic results implied that isotope species from Baengnyeong were mostly originated from coal combustion during China's winter heating seasons, whereas in summer, the isotopic patterns observed that were more likely to be from marine...
November 7, 2017: Environmental Pollution
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