Scholar Bank Log in
DSpace
 

Digital Repository >
Applied Sciences >
General >
Information Resources on General >

Please use this identifier to cite or link to this item: http://dr.lib.sjp.ac.lk/handle/123456789/5314

Title: Microorganisms and Heavy Metals Associated with Atmospheric Deposition in a Congested Urban Environment of a Developing Country: Sri Lanka
Authors: Weerasundara, L.
Amarasekara, R.W.K.
Magana-Arachchi, D.N.
Ziyath, A.M.
Karunaratne, D.G.G.P.
Goonetilleke, A.
Vithanage, M.
Keywords: Bacteria
Opportunistic pathogens
Atmospheric pollution
Heavy metals
Wet and dry deposition
Sri Lanka
Issue Date: 2017
Publisher: Elsevier
Citation: Weerasundara, L., Amarasekara, R.W.K., Magana-Arachchi, D.N., Ziyath, A.M., Karunaratne, D.G.G.P., Goonetilleke, A., & Vithanage, M. (2017). Microorganisms and Heavy Metals Associated with Atmospheric Deposition in a Congested Urban Environment of a Developing Country: Sri Lanka. Science of the Total Environment, 584-585, 803-812.
Abstract: The presence of bacteria and heavy metals in atmospheric deposition were investigated in Kandy, Sri Lanka, which is a typical city in the developing world with significant traffic congestion. Atmospheric deposition samples were analyzed for Al, Cr, Mn, Fe, Ni, Cu, Zn, Cd and Pb which are heavy metals common to urban environments. Al and Fe were found in high concentrations due to the presence of natural sources, but may also be resuspended by vehicular traffic. Relatively high concentrations of toxic metals such as Cr and Pb in dissolved form were also found. High Zn loads can be attributed to vehicular emissions and the wide use of Zn coated roofing materials. The metal loads in wet deposition showed higher concentrations compared to dry deposition. The metal concentrations among the different sampling sites significantly differ from each other depending on the traffic conditions. Industrial activities are not significant in Kandy City. Consequently, the traffic exerts high influence on heavy metal loadings. As part of the bacterial investigations, nine species of culturable bacteria, namely; Sphingomonas sp„ Pseudomonas aeruginosa. Pseudomonas monteilii, Klebsiella pneumonia, Ochrobactrum intermedium, Leclercia adecarboxylata, Exiguobacterium sp.. Bacillus pumilus and Kocuria kristinae, which are opportunistic pathogens, were identified. This is the first time Pseudomonas monteilii and Ochrobactrum intermedium has been reported from a country in Asia. The culturable fraction constituted -0.01 to 10%. Pigmented bacteria and endospore forming bacteria were copious in the atmospheric depositions due to their capability to withstand harsh environmental conditions. The presence of pathogenic bacteria and heavy metals creates potential human and ecosystem health risk.
URI: http://dr.lib.sjp.ac.lk/handle/123456789/5314
ISSN: 0048-9697
Appears in Collections:Information Resources on General

Files in This Item:

File Description SizeFormat
Microorganisms and Heavy Metals Associated with Atmospheric Deposition in a Congested Urban Environment of a Developing Country Sri Lanka-001.pdf61.12 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Copyright © 2016 Library, University of Sri Jayewardenepura    Designed by: Library IT Division    Last updated: 24.08.2017