Sources, composition, and mixing state of submicron particulates over the central indo-gangetic plain
Document Type
Article
Publication Date
8-19-2021
Abstract
Submicron particulates, collected between 2015 and 2018 in an urban environment over the central Indo-Gangetic Plain, South Asia, were analyzed. Particulate concentration was typically high during winter (DJF, 115 50 tig m-3) and post -monsoon seasons (ON, 79 52 pg m-3). Submicron particulates constituted a major fraction (69%) of fine particulates (PM).,) without much seasonal discrepancies. Particulates were metal-enriched (17 6%) with signature of crustal and road dust resuspensions. Metal enrichment was evident specifically for Zn, Co, and Cr. Sulfate was the most robust ion contributing 10% ( 4%) of particulate mass followed by nitrate (6 3%) and ammonium (4 2%). Overall, water-soluble ions accounted for one-third of particulate mass mainly comprised secondary ones. The n-alkane homologues (C17 C35) showed prevalence of lowmolecular-weight (LMW) alkanes (
Keywords
Inorganic species, Levoglucosan, Mixing state, Receptor model, Secondary aerosols
Divisions
CHEMISTRY
Funders
ASEAN-India SAMP;T Development Fund [CRD/2018/000011],Department of Science & Technology (India) Department of Science & Technology (DOST), Philippines [SR/WOS-A/EA-1012/2015],French National Research Agency (ANR) [ANR11-LABX-0005-01],Hauts de France" Regional Council,European Commission,IoE Faculty Incentive Grant [6031],Banaras Hindu University
Publication Title
ACS Earth and Space Chemistry
Volume
5
Issue
8
Publisher
Amer Chemical Soc
Publisher Location
1155 16TH ST, NW, WASHINGTON, DC 20036 USA