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

作　　者：Subhash Chandra Monika J.Kulshrestha Ruchi Singh Nahar Singh 

机构地区：[1]CSIR-National Physical Laboratory, New Delhi 110012, India. [2]Academy of Scientific and Innovative Research (AcSIR), CSIR - National Physical Laboratory, (CSIR-NPL) Campus, New Delhi 110012, India [3]Present address: Shriram Institute for Industrial Research, Delhi, 110,007, India.

出　　处：《Journal of Environmental Sciences》2017年第5期184-196,共13页环境科学学报（英文版）

基　　金：Partial financial support from the CSIR network project(PSC 0112);CSIR fellowship to Subhash Chandra,SRF

摘　　要：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.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.

关 键 词：Trace metals Potential source regions Backward trajectory Principal component analysis 

分 类 号：X513[环境科学与工程—环境工程]