Seasonal Trends of Organic and Elemental Carbon in PM1 Measured over an Industrial Area of Delhi, India

Singh, Akash Kumar; Srivastava, Arun

doi:10.1007/s41810-020-00088-w

Cited by 2 publications

(3 citation statements)

References 102 publications

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“…Guo et al [12] observed that the proportion of sulfate in PM 2.5 ranged from 28.2% to 50.5% in Nanjing in 2015. The secondary air pollutants generated by the reaction of the primary pollutants also exert considerable effects on regional environmental quality and human health [13,14].…”

Section: Introductionmentioning

confidence: 99%

Quantifying Air Pollutant Variations during COVID-19 Lockdown in a Capital City in Northwest China

Feng

Wang

et al. 2021

Atmosphere

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In the context of the outbreak of coronavirus disease 2019 (COVID-19), strict lockdown policies were implemented to control nonessential human activities in Xi’an, northwest China, which greatly limited the spread of the pandemic and affected air quality. Compared with pre-lockdown, the air quality index and concentrations of PM2.5, PM10, SO2, and CO during the lockdown reduced, but the reductions were not very significant. NO2 levels exhibited the largest decrease (52%) during lockdown, owing to the remarkable decreased motor vehicle emissions. The highest K+ and lowest Ca2+ concentrations in PM2.5 samples could be attributed to the increase in household biomass fuel consumption in suburbs and rural areas around Xi’an and the decrease in human physical activities in Xi’an (e.g., human travel, vehicle emissions, construction activities), respectively, during the lockdown period. Secondary chemical reactions in the atmosphere increased in the lockdown period, as evidenced by the increased O3 level (increased by 160%) and OC/EC ratios in PM2.5 (increased by 26%), compared with pre-lockdown levels. The results, based on a natural experiment in this study, can be used as a reference for studying the formation and source of air pollution in Xi’an and provide evidence for establishing future long-term air pollution control policies.

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Section: Introductionmentioning

confidence: 99%

Quantifying Air Pollutant Variations during COVID-19 Lockdown in a Capital City in Northwest China

Feng

Wang

et al. 2021

Atmosphere

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“…The variation in the concentrations of carbonaceous compounds such as EC and OC, and their contribution to PM can be attributed to different factors such as particle size, time of the year wind patterns, temperature, changes in boundary layer dynamics, geographical location, different human activities, intensity of vehicular traffic, and different types of industrial activities. For example, in the Delhi Industrial area, high OC and EC concentrations occurred in the post Monsoon season due to biomass burning emissions and contribution from fireworks of Diwali festival [53]. While, for the case of Changchun in the Northeast China, the highest OC and EC values were produced by a sandstorm [62].…”

Section: Carbonaceous Fraction Present In Particulate Mattermentioning

confidence: 99%

“…Moretti et al, [17] indicated that in rural sites, OC concentration increases in warm periods, whereas, as for traffic and urban sites, seasonal trends of OC and EC reach the highest levels during winter. Unfavorable meteorological conditions for the dispersion of carbonaceous aerosols may prevail in winter, as low wind speed, atmospheric stability, and lower boundary layer height may increase OC and EC concentrations in the atmosphere [53].…”

Section: Carbonaceous Fraction Present In Particulate Mattermentioning

confidence: 99%

A Review on the Characterization and Measurement of the Carbonaceous Fraction of Particulate Matter

Correa-Ochoa,

Bedoya,

Gómez

et al. 2023

Sustainability

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The carbonaceous particles represent a significant fraction in the particulate matter (PM) and are considered an environmental hazard due to their effects on climate and health. The main goal in this research is to identify and analyze the scope that have been achieved so far on the characterization and measurement of the carbonaceous fraction present in PM, a great contribution to global pollution and thus to the deterioration of public health. The ProKnow-C methodology was used to build a bibliographic portfolio and perform a bibliometric and systemic analysis of the information found in the chosen databases. The contribution of these carbonaceous compounds to PM is very significant, reaching values up to 50%. The most used methods for the determination of organic and elemental carbon are thermo-optical reflectance and transmittance. Positive Factorization models are used worldwide to determine potential sources of particulate matter emissions. Even though various studies have been developed to understand these carbonaceous substances, there are several limitations in the measurements and limited knowledge on the subject. The positive outcomes and future possibilities were analyzed as well.

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Seasonal Trends of Organic and Elemental Carbon in PM1 Measured over an Industrial Area of Delhi, India

Cited by 2 publications

References 102 publications

Quantifying Air Pollutant Variations during COVID-19 Lockdown in a Capital City in Northwest China

Quantifying Air Pollutant Variations during COVID-19 Lockdown in a Capital City in Northwest China

A Review on the Characterization and Measurement of the Carbonaceous Fraction of Particulate Matter

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