Seasonal variation and risk assessment of PM2.5 and PM2.5–10 in the ambient air of Kenitra, Morocco

2017 ◽  
Vol 19 (11) ◽  
pp. 1427-1436 ◽  
Author(s):  
Mounia Tahri ◽  
Abdelfettah Benchrif ◽  
Moussa Bounakhla ◽  
Fouad Benyaich ◽  
Yves Noack
Keyword(s):  
Risk Assessment ◽  
Particulate Matter ◽  
Seasonal Variation ◽  
Chemical Composition ◽  
Ambient Air ◽  
Spatial Variations ◽  
Seasonal And Spatial Variations ◽  
One Year

The seasonal and spatial variations of particulate matter (PM2.5–10 and PM2.5) and its chemical composition have been studied over a one-year (2007–2008) in Kenitra city, located in northern Morocco.

Seasonal variation, risk assessment and source estimation of PM 10 and PM10-bound PAHs in the ambient air of Chiang Mai and Lamphun, Thailand

2008 ◽  
Vol 154 (1-4) ◽  
pp. 197-218 ◽  
Author(s):  
Petch Pengchai ◽  
Somporn Chantara ◽  
Khajornsak Sopajaree ◽  
Sunanta Wangkarn ◽  
Urai Tengcharoenkul ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Seasonal Variation ◽  
Ambient Air ◽  
Chiang Mai ◽  
Source Estimation ◽  
Pm 10

scholarly journals Seasonal and Spatial Variation of Volatile Organic Compounds in Ambient Air of Almaty City, Kazakhstan

Atmosphere ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1592
Author(s):  
Olga P. Ibragimova ◽  
Anara Omarova ◽  
Bauyrzhan Bukenov ◽  
Aray Zhakupbekova ◽  
Nassiba Baimatova
Keyword(s):  
Air Pollution ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Power Plants ◽  
Ambient Air ◽  
Spatial Variations ◽  
Primary Sources ◽  
Volatile Organic ◽  
Seasonal And Spatial Variations ◽  
Before And After

Air pollution is one of the primary sources of risk to human health in the world. In this study, seasonal and spatial variations of multiple volatile organic compounds (VOCs) were measured at six sampling sites in Almaty, Kazakhstan. The seasonal and spatial variations of 19 VOCs were evaluated in 2020, including the periods before and after COVID-19 lockdown. The concentrations of 9 out of 19 VOCs had been changed significantly (p < 0.01) during 2020. The maximum concentrations of total VOCs (TVOCs) were observed on 15, 17, and 19 January and ranged from 233 to 420 µg m−3. The spatial distribution of TVOCs concentrations in the air during sampling seasons correlated with the elevation and increased from southern to northern part of Almaty, where Combined Heat and Power Plants are located. The sources of air pollution by VOCs were studied by correlations analysis and BTEX ratios. The ranges of toluene to benzene ratio and benzene, toluene, and ethylbenzene demonstrated two primary sources of BTEX in 2020: traffic emissions and biomass/biofuel/coal burning. Most of m-, p-xylenes to ethylbenzene ratios in this study were lower than 3 in all sampling periods, evidencing the presence of aged air masses at studied sampling sites from remote sources.

Seasonal variation and chemical composition of particulate matter: A study by XPS, ICP-AES and sequential microanalysis using Raman with SEM/EDS

2018 ◽  
Vol 74 ◽  
pp. 32-49 ◽  
Author(s):  
Lucy T. González ◽  
Francisco E. Longoria-Rodríguez ◽  
Margarita Sánchez-Domínguez ◽  
Cesar Leyva-Porras ◽  
Karim Acuña-Askar ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Seasonal Variation ◽  
Chemical Composition

scholarly journals Airborne Carcinogenic Trace Elements Distribution Associated with Long Term Exposure in Makkah Population

2019 ◽  
Vol 12 (1) ◽  
pp. 7-14
Author(s):  
Heba M. Adly ◽  
Saleh A. K. Saleh ◽  
Abdulla A. Saati ◽  
Samir H. Fatani
Keyword(s):  
Trace Elements ◽  
Particulate Matter ◽  
Control Sample ◽  
Ambient Air ◽  
Air Temperatures ◽  
Air Dispersion ◽  
Plasma Mass Spectrometry ◽  
Highly Correlated ◽  
One Year

Background: More than 4 million international pilgrims visit Makkah each year during the Hajj and Umrah seasons. Since trace elements are natural ingredients that endure general biogeochemical cycling, conversion functions between environmental loadings, mass levels, and exposed receptors. Objective: This study aimed to evaluate the distribution of carcinogenic trace element levels related to long term exposure. Methods: Particulate Matter (PM10) sampling was conducted at six locations (Al-Haram, Arafat, Muzdalifah, Aziziyah, Al Nuzhah, and Al Awali). On-site measurement parameters included ambient temperature, wind speed, and direction over 37 weeks. Samples were investigated for Cd, Cr, As, Be, and Ni levels with inductive coupled plasma mass spectrometry. Quality assurance measures were achieved separately by analyzing a control sample to certify reliability, reproducibility, and linearity for each analysis. Results: Average particulate matter concentration for a one-year period presented significant variability, which exceeded the WHO guidelines for average exposure (25.0 µgm-3). PM10 average concentrations during round-1 (Spring), round-2 (Summer), round-3 (Autumn) and round-4 (Winter) were 120.1 ± 52.2 µgm-3, 223.4 ± 30.4 µgm-3, 77.6 ± 36.72, and 89 ± 62.7 µgm-3, respectively. The concentrations of Cd, Cr, As, Be, and Ni were found to be 0.098, 0.008, 0.26, 0.03, and 0.012 µgm-3, respectively. Conclusion: PM10 concentration was highly correlated (p-value <0.005) with Cd, Cr, As, Be, and Ni; thereby indicating the influence of manufacturing discharges and pollutants transported over long-distances. Higher ambient air temperatures may cause atmospheric instability in low air dispersion around Makkah. This highlights the importance of continuous air monitoring and calculation of dose exposure levels of both PM10 and trace elements.

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