| Title: | "Biogenic secondary organic aerosol formation in an urban area of eastern central India: Seasonal variation, size distribution and source characterization" |
| Author(s): | Mahilang M; Deb MK; Pervez S; Tiwari S; Jain VK; |
| Address: | "School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, 492010, India. School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, 492010, India. Electronic address: debmanas@yahoo.com. Department of Chemistry, Government Engineering College, Sejbahar, Raipur, Chhattisgarh, India" |
| DOI: | 10.1016/j.envres.2021.110802 |
| ISSN/ISBN: | 1096-0953 (Electronic) 0013-9351 (Linking) |
| Abstract: | "Samples of ambient aerosols were collected at an urban site of eastern central India from monsoon to summer 2016-17 for the characterization of biogenic secondary organic aerosols (BSOA). The BSOA tracers derived from isoprene, alpha/beta-pinene and beta-caryophyllene in size-distributed aerosols were studied. Concentrations of total SOAI (Isoprene secondary organic aerosols) were found more abundant than alpha/beta-pinene in summer, while contradictory trends were found in the winter season, where SOAM (monoterpene derived SOA) and SOAS (sesquiterpenes derived SOA) were dominated. Size-distribution study revealed that most of the BSOA were formed in the aerosol phase and dominated in fine mode, except cis-pinonic acid. They were formed in the gaseous phase and partitioned onto the aerosol phase. The alkaline nature of mineral dust particles that triggered the adsorption of gaseous species onto pre-existing particles could be the reason for bimodal size distribution with major coarse mode peak and miner fine mode peak. Temporal variations suggest that the BSOA must be derived from terrestrial vegetation and biomass burning. The isoprene SOC (secondary organic carbon) contributed 0.91%, 1.38%, 0.88% and 1.04% to OC during winter, summer, post-monsoon and monsoon season, respectively. The isoprene SOC in fine mode was found to be higher than the coarse mode" |
| Keywords: | Aerosols/analysis *Air Pollutants/analysis Environmental Monitoring India *Particulate Matter/analysis Seasons Biogenic secondary organic aerosols Biogenic volatile organic compounds Eastern central India Gas chromatography mass spectrometry Size-distribu; |
| Notes: | "MedlineMahilang, Mithlesh Deb, Manas Kanti Pervez, Shamsh Tiwari, Swapnil Jain, Vikas Kumar eng Research Support, Non-U.S. Gov't Netherlands 2021/02/01 Environ Res. 2021 Apr; 195:110802. doi: 10.1016/j.envres.2021.110802. Epub 2021 Jan 28" |
