scholarly journals Exploring Factors Affecting on Willingness to Observe Air Pollution Reduction Policies in Tehran, Iran

2021 ◽  
Vol 17 (1) ◽  
pp. 14-22
Author(s):  
Pejman Jafari ◽  
Afrooz Botshekan
Keyword(s):  
Air Pollution ◽  
Pollution Reduction ◽  
Factors Affecting

scholarly journals Transboundary air pollution reduction rapidly reflected in stream water chemistry in forested catchment on the sea of Japan coast in central Japan

2021 ◽  
Vol 248 ◽  
pp. 118223
Author(s):  
Hiroyuki Sase ◽  
Tatsuyoshi Saito ◽  
Masaaki Takahashi ◽  
Masayuki Morohashi ◽  
Naoyuki Yamashita ◽  
...  
Keyword(s):  
Air Pollution ◽  
Water Chemistry ◽  
Sea Of Japan ◽  
Stream Water ◽  
Pollution Reduction ◽  
The Sea Of Japan ◽  
Central Japan ◽  
Stream Water Chemistry ◽  
Forested Catchment ◽  
Transboundary Air Pollution

scholarly journals Meteorological Variables and Synoptic Patterns Associated with Air Pollutions in Eastern China during 2013–2018

2020 ◽  
Vol 17 (7) ◽  
pp. 2528 ◽  
Author(s):  
Zhujun Dai ◽  
Duanyang Liu ◽  
Kun Yu ◽  
Lu Cao ◽  
Youshan Jiang
Keyword(s):  
Air Pollution ◽  
Eastern China ◽  
Meteorological Condition ◽  
Temperature Inversion ◽  
Meteorological Conditions ◽  
Meteorological Variables ◽  
Synoptic Situation ◽  
Factors Affecting ◽  
Air Pollutions ◽  
Meteorological Elements

Steady meteorological conditions are important external factors affecting air pollution. In order to analyze how adverse meteorological variables affect air pollution, surface synoptic situation patterns and meteorological conditions during heavy pollution episodes are discussed. The results showed that there were 78 RPHPDs (regional PM2.5 pollution days) in Jiangsu, with a decreasing trend year by year. Winter had the most stable meteorological conditions, thus most RPHPDs appeared in winter, followed by autumn and summer, with the least days in spring. RPHPDs were classified into three patterns, respectively, as equalized pressure (EQP), advancing edge of a cold front (ACF) and inverted trough of low pressure (INT) according to the SLP (sea level pressure). RPHPDs under EQP were the most (51%), followed by ACF (37%); INT was the minimum (12%). Using statistical methods and meteorological condition data on RPHPDs from 2013 to 2017 to deduce the thresholds and 2018 as an independent dataset to validate the proposed thresholds, the threshold values of meteorological elements are summarized as follows. The probability of RPHPDs without rain was above 92% with the daily and hourly precipitation of all RPHPDs below 2.1 mm and 0.8 mm. Wind speed, RHs, inversion intensity(ITI), height difference in the temperature inversion(ITK), the lower height of temperature inversion (LHTI) and mixed-layer height (MLH) in terms of 25%–75% high probability range were respectively within 0.5–3.6 m s−1, 55%–92%, 0.7–4.0 °C 100 m −1, 42–576 m, 3–570 m, 200–1200 m. Two conditions should be considered: whether the pattern was EQP, ACF or INT and whether the eight meteorological elements are within the thresholds. If both criteria are met, PM2.5 particles tend to accumulate and air pollution diffusion conditions are poor. Unfavorable meteorological conditions are the necessary, but not sufficient condition for RPHPDs.

scholarly journals COVID-19 national lockdown in Morocco: impacts on air quality and public health

2020 ◽  
Author(s):  
Kenza Khomsi ◽  
Houda Najmi ◽  
Hassan Amghar ◽  
Youssef Chelhaoui ◽  
Zineb Souhaili
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Anthropogenic Activities ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Pollution Reduction ◽  
Industrial Activities ◽  
Large Cities ◽  
Almost All ◽  
Quality Status

AbstractOn the 20th April 2020, the end date of the first strict lockdown period in Morocco, 2 403 410 cases of the corona Virus were confirmed globally. The number of Morocco confirmed cases attended 2990, while 12 746 were suspected and 143 deaths were recorded. Due to the pandemic of coronavirus disease 2019 worldwide and in Morocco, almost all avoidable activities in the country were prohibited since the kingdom announced activities reduction on March 16, 2020 and then general lockdown with reduced industrial activities on March 20, 2020.This study aims at comparing the air quality status in Casablanca and Marrakech, two large cities from Morocco, before the pandemic and during the lockdown situation to show whether COVID-19 compelled-anthropogenic activities lockdown may have saved lives by restraining ambient air pollution than by preventing infection.We found that, during the quarantine, NO2 dropped by -12 μg/m3 in Casablanca and -7 μg/m3 in Marrakech. PM2·5 dropped by -18 μg/m3 in Casablanca and -14 μg/m3 in Marrakech. CO dropped by -0.04 mg/m3 in Casablanca and -0.12 mg/m3 in Marrakech. This air pollution reduction had created human health benefits and had reduced mortality and saved lives mainly from cardiovascular diseases.

scholarly journals A Review of Solvent Selection Considerations in Absorption Systems

2019 ◽  
Vol 4 (11) ◽  
pp. 5-10
Author(s):  
I. Ubong ◽  
N. Harry-Ngei ◽  
P. N. Ede
Keyword(s):  
Air Pollution ◽  
Pollution Control ◽  
Review Paper ◽  
Cost Effective ◽  
Flue Gases ◽  
Air Pollution Control ◽  
Absorption System ◽  
Cost Consideration ◽  
Factors Affecting ◽  
Factors Affecting Performance

This review paper focuses on the description, uses and emission removal functions of a solvent with respect to air pollution control of the flue gases in a combustion chamber exhaust waste stream. The physical characteristics of the solvent required for improved and optimal performance of the absorption system where discussed. The factors affecting performance of the solvent with reference to parametric changes in operations as well as cost consideration schemes required to select the most appropriate solvent for increased performance were also ex-rayed. The choice of a solvent that is cost effective and readily available was recommended in the study. 

Identification of factors affecting air pollution by dust aerosol PM10 in Brno City, Czech Republic

2008 ◽  
Vol 42 (37) ◽  
pp. 8661-8673 ◽  
Author(s):  
Zuzana Hrdličková ◽  
Jaroslav Michálek ◽  
Miroslav Kolář ◽  
Vítězslav Veselý
Keyword(s):  
Air Pollution ◽  
Czech Republic ◽  
Dust Aerosol ◽  
Factors Affecting
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