Chemical characteristics of trace metals in PM10 and their concentrated weighted trajectory analysis at Central Delhi,India

Chemical characteristics of trace metals in PM10 and their concentrated weighted trajectory analysis at Central Delhi,India

Trace metals associated with PM10 aerosols and their variation during day and nighttime as well as during different seasons have been studied for the year 2012. PCA analysis suggested5 PCs,which accounted for 86.8% cumulative variance. PC1 accounted for 30% with a significant loading of metals of an...

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Veröffentlicht in:Journal of environmental sciences (China) 2017-05, Vol.55 (5), p.184-196
Hauptverfasser: Chandra, Subhash, Kulshrestha, Monika J., Singh, Ruchi, Singh, Nahar
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Backward trajectory
Potential source regions
Principal component analysis
Trace metals
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container_issue 5
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container_title Journal of environmental sciences (China)
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creator Chandra, Subhash
Kulshrestha, Monika J.
Singh, Ruchi
Singh, Nahar
description Trace metals associated with PM10 aerosols and their variation during day and nighttime as well as during different seasons have been studied for the year 2012. PCA analysis suggested5 PCs,which accounted for 86.8% cumulative variance. PC1 accounted for 30% with a significant loading of metals of anthropogenic origin,while PC2 showed 28% variance with the loading of metals of crustal origin. These trace metals showed seasonal distinct day and night time characteristics. The concentrations of Cu,Pb,and Cd were found to be higher during nighttime in all the seasons. Only Fe was observed with significantly higher mean concentrations during daytime of all seasons except monsoon. The highest mean values of Cu,Cd,Zn,and Pb during post-monsoon might be attributed to winds advection over the regions of waste/biomass burning and industrial activities in Punjab and Haryana regions.Furthermore,concentration weighted trajectory analysis suggested that metals of crustal origin were contributed by long-range transport while metals of anthropogenic and industrial activities were contributed by regional/local source regions.
doi_str_mv 10.1016/j.jes.2016.06.028
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source Elsevier ScienceDirect Journals; Alma/SFX Local Collection
subjects Backward trajectory
Potential source regions
Principal component analysis
Trace metals
title Chemical characteristics of trace metals in PM10 and their concentrated weighted trajectory analysis at Central Delhi,India
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