Biogenic secondary organic aerosols: A review on formation mechanism, analytical challenges and environmental impacts

Mahilang, Mithlesh; Deb, Manas Kanti; Pervez, Shamsh

doi:10.1016/j.chemosphere.2020.127771

Cited by 94 publications

(33 citation statements)

References 192 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For ozone, all four periods are reflected in overall high ozone concentrations in the southeast, which is reflected in the fact that the JYP has the highest average ozone concentration of all stations throughout the study period. The JYP has a high vegetation cover and low emissions, the vegetation releases large amounts of ozone precursors, such as VOCs (Mahilang et al, 2021), and the titration reaction is accelerated, resulting in elevated ozone concentrations in the urban area.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Analysis of Air Quality Changes and Influencing Factors in Changchun during the COVID-19 Pandemic in 2020

Gao

et al. 2021

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

To study the air quality changes during the Corona Virus Disease 2019 (COVID-19) lockdown in Changchun, we analyzed the changes in pollution of six major pollutants (PM2.5, PM10, SO2, NO2, O3, CO) and correlated them with meteorological parameters, using meteorological data and pollutants concentration data. Regional transport pathways and potential source areas of pollutants were analyzed using the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model and Potential Source Contribution Function (PSCF). The results showed that the concentrations of PM2.5, PM10, SO2, NO2, CO were 30.5%-53.8% lower in the Level I period and 49.4%-65.0% lower in the Level II period than in the Pre-lockdown period, respectively.Conversely, O3 increased 59.6% and 58.1% during Level I and Level II, respectively, compared to the Pre-lockdown period. During the 55-day lockdown, daily average concentrations of each pollutant were lower than in previous years on 36-55 days, while O3 was higher on 35 days. The pollutants that decreased in concentration during the lockdown also showed an increase during the Level III period (up to 188.5%). The maximum daily growth rate of PM2.5 during the lockdown period in 2020 was 16.0%, which was higher than this value in the same period of previous years (21.8%, 21.4%, 17.4%). This shows that the change trend of pollutants during the lockdown period is smoother than in previous years. Temperature and O3 were positively correlated before the lockdown and during Level Ⅰ and weakly negatively correlated during Level Ⅱ and Level Ⅲ.Despite the prevalence of northwest winds in winter, a high percentage of trajectories from other directions (up to 36.8%) was observed during the lockdown. Simultaneously, the lockdown reduced the potential source area for PM2.5 (WPSCF≥0.000007), but rebounded after the lockdown was lifted. In conclusion, the lockdown only temporarily reduced the air pollution in Changchun.

show abstract

Section: Accepted Manuscriptmentioning

confidence: 99%

Analysis of Air Quality Changes and Influencing Factors in Changchun during the COVID-19 Pandemic in 2020

Gao

et al. 2021

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

show abstract

“…Meteorological conditions play an important role in BVOCs emissions and BSOA formation (Mahilang et al., 2021). The modeled surface temperature and relativity humidity were validated against measurements conducted at T 3 site from third through 20 th March of 2014 (Figure 2).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Biogenic Organic Aerosols in the Amazon Rainforest Using WRF‐Chem With MOSAIC

Mao

Zhou

et al. 2021

JGR Atmospheres

View full text Add to dashboard Cite

Biogenic secondary organic aerosol (BSOA) accounts for 70%–80% of submicron aerosol over the Amazon rainforest. However, uncertainties with regard to the chemical formation pathway, mass budget, and radiative impact of BSOA in the region still remain high. To address the issue, we used a regional chemistry transport model (WRF‐Chem‐MOSAIC) to evaluate the budget of BSOA in the Amazon forest during the wet season (March) of 2014 when the air mass was clean from influences from anthropogenic and biomass burning emissions. We found that the default model underestimated the surface concentration of submicron organic aerosol (OA) by 57% at a ground measurement site (T3). We subsequently updated the WRF‐Chem‐MOSAIC model by including SOA formation from isoprene epoxydiols (IEPOX‐SOA) and SOA aging schemes. The updated model reproduced the observed submicron OA concentration well with an overestimation of only 2.5%. With the updated model, we will show that IEPOX‐SOA accounts for 23% of surface submicron OA averaged over the entire Amazon rainforest. The modeled surface SOA (smaller than 2.5 μm in diameter) concentration in the Amazon region was about a factor of 14 larger than the global mean. Finally, a sensitivity study was conducted which showed that convective plumes can remove more than 40% of submicron OA below 5 km in the Amazon region. Overall, our study highlights the importance of IEPOX chemistry as well as the convective removal processes in the global SOA budget.

show abstract

“…[139][140][141] Ehn and co-workers had shown that HOM formation decreased about 50 percent when experiments were performed at 0 C compared to 20 C. 142 While the molecular formulae and structures of some of the primary products of the photooxidation reactions have been identied, many mechanistic details, reaction intermediates, and reaction end products have not been denitively characterized, but there has been considerable interest in understanding the SOA in recent years. [143][144][145] The current state of the art and challenges in molecular characterization of SOA components are reviewed by Nozierre, 146 and Mahilang, 147 and their co-workers.…”

Section: Ozonolysis Of A-pinenementioning

confidence: 99%

The pinene scaffold: its occurrence, chemistry, synthetic utility, and pharmacological importance

Nyamwihura

Ogungbe

2022

RSC Adv.

View full text Add to dashboard Cite

show abstract

Biogenic secondary organic aerosols: A review on formation mechanism, analytical challenges and environmental impacts

Cited by 94 publications

References 192 publications

Analysis of Air Quality Changes and Influencing Factors in Changchun during the COVID-19 Pandemic in 2020

Analysis of Air Quality Changes and Influencing Factors in Changchun during the COVID-19 Pandemic in 2020

Evaluation of Biogenic Organic Aerosols in the Amazon Rainforest Using WRF‐Chem With MOSAIC

The pinene scaffold: its occurrence, chemistry, synthetic utility, and pharmacological importance

Contact Info

Product

Resources

About