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Water-soluble organic compounds (WSOCs) in PM2.5 and PM10 at a subtropical site of India Cover

Water-soluble organic compounds (WSOCs) in PM2.5 and PM10 at a subtropical site of India

By: ,   and    
Open Access
|Jan 2011

Abstract

PM2.5 and PM10 samples collected at a suburban site of northeastern part of India have been analysed for particle mass, total carbon (TC), water-soluble total carbon (WSTC), water-soluble organic carbon (WSOC), water-soluble inorganic carbon (WSIC), organic acids (formic, acetic, proponoic and oxalic acids) along with inorganic ions (NO3 , SO4 2− and NH4 ). Most of the PM10 consists of PM2.5 in the present site (ratio 54–74%). WSTC content in PM2.5 and PM10 corresponds to 21% and 16%, respectively, of their total particle masses. Thermo gravimetric analysis showed the presence of humic-like substances (16–22%) in particulate samples. Domestic heating and stagnant atmospheric conditions enhanced the levels of these carbonaceous compounds in PM2.5 and PM10 in winter. Qualitative estimation of various functional groups by Fourier transform infrared (FTIR) analysis indicates the presence of carboxylic, hydroxyl, aliphatic and aromatic hydrocarbons, amines and sulphurous compounds in these aerosols. Absolute principal component analysis applied on the aerosol data resolves four factors. These factors are associated with carbonaceous aerosols released from combustion of coal and wood, secondary inorganic and organic aerosols and water-soluble inorganic fraction

Language: English
Page range: 990 - 1000
Submitted on: Jun 25, 2010
Accepted on: May 19, 2011
Published on: Jan 1, 2011
Published by: Stockholm University Press
In partnership with: Paradigm Publishing Services

© 2011 Puja Khare, B.P. Baruah, P.G. Rao, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.