NDLI: Metallic species in PM$_{10}$ and source apportionment using PCA-MLR modeling over mid-Brahmaputra Valley

Content Provider	Springer Nature Link
Author	Deka, Pratibha Bhuyan, Pranamika Daimari, Rebecca Sarma, Kali Prasad Hoque, Raza Rafiqul
Copyright Year	2016
Abstract	This study was conducted to understand the attributes of metallic species associated with PM$_{10}$ over Mid-Brahmaputra Valley. PM$_{10}$ was sampled for a yearlong period (December 2008 to November 2009) at a rural receptor site by a high volume sampler, which was chemically analyzed for 10 metallic species viz. Mg, K, Ca, Cr, Mn, Fe, Co, Ni, Cu, Cd, and Pb by acid digestion followed by estimation by ICP-OES. The mean PM$_{10}$ for the study period was found to be 147.10 ± 153 μg m$^{−3}$, and marked seasonality of the mass concentrations of PM$_{10}$ was observed. However, the concentrations of the metallic species did not show seasonality that was statistically significant. High PM$_{10}$ levels during monsoon were therefore attributed to delay and deficit rainfall, secondary formation of aerosols, and favorable atmospheric conditions viz. subsidence and thermal inversion. This was as evident from analyses of vertical temperature profile and HYSPLIT air mass trajectories. The enrichment factors revealed that K, Cr, Ni, and Pb were moderately, and Cd highly enriched in PM$_{10}$ indicating anthropogenic contribution. Inter-species correlations and principal component analysis-multiple linear regression (PCA-MLR) of elements associated in PM$_{10}$ indicates biomass burning, crustal dust, soil, and fossil fuel burning as the possible sources. The source contributions were validated and the contributions of total elements by the sources to the predicted concentrations by PCA-MLR showed good agreement.
Starting Page	1
Ending Page	13
Page Count	13
File Format	PDF
ISSN	18667511
Journal	Arabian Journal of Geosciences
Volume Number	9
Issue Number	5
e-ISSN	18667538
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-04-18
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	PM$_{10}$ Metallic species Source apportionment PCA-MLR HYSPLIT trajectory Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Environmental Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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