Please use this identifier to cite or link to this item: https://doi.org/10.1021/es052163z
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dc.titlePersistent organic pollutants in the equatorial atmosphere over the open Indian Ocean
dc.contributor.authorWurl, O.
dc.contributor.authorPotter, J.R.
dc.contributor.authorObbard, J.P.
dc.contributor.authorDurville, C.
dc.date.accessioned2014-10-08T08:33:14Z
dc.date.available2014-10-08T08:33:14Z
dc.date.issued2006-03-01
dc.identifier.citationWurl, O., Potter, J.R., Obbard, J.P., Durville, C. (2006-03-01). Persistent organic pollutants in the equatorial atmosphere over the open Indian Ocean. Environmental Science and Technology 40 (5) : 1454-1461. ScholarBank@NUS Repository. https://doi.org/10.1021/es052163z
dc.identifier.issn0013936X
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/87585
dc.description.abstractTwelve air samples collected over the Indian Ocean by a high volume air sampler between August 2004 and August 2005 were analyzed for selected polychlorinated biphenyl (PCB) congeners and organochlorine pesticides. The region of the Indian Ocean and adjacent countries is likely to be acting as a source of selected POPs to the global environment. Data were compared with those reported for the last 30 years to examine historical trends of selected persistent organic pollutants (POPs) over the Indian Ocean. Compound concentrations were influenced by the proximity to land and air mass origins. Higher concentrations of atmospheric ΣPCBs (50-114 pg m-3) were found on the remote islands of Chagos Archipelago and Can, Maldives, and in the proximity of Jakarta, Indonesia, and Singapore. Military activities and unregulated waste combustion were identified as possible sources for atmospheric PCB contaminations at the more remote areas. The highest concentrations of organochlorine pesticides were found adjacent to the coastline of Sumatra and Singapore, where ΣDDTs (dichlorodiphenyl-trichloroethane) and ΣHCHs (hexacyclohexanes) were as high as 30 and 100 pg m-3, respectively. A comparison study for the last 30 years over six regions of the Indian Ocean showed that the concentrations of organochlorine pesticides have declined significantly, by a magnitude of two, since the mid 1970s, but were highest at the beginning of the 1990s. The time trend of PCB contamination in the atmosphere over the Indian Ocean is less apparent. The decline of atmospheric POPs over the Indian Ocean may be due to international regulation of the use of these compounds. © 2006 American Chemical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1021/es052163z
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentTROPICAL MARINE SCIENCE INSTITUTE
dc.contributor.departmentDIVISION OF ENVIRONMENTAL SCIENCE & ENGG
dc.description.doi10.1021/es052163z
dc.description.sourcetitleEnvironmental Science and Technology
dc.description.volume40
dc.description.issue5
dc.description.page1454-1461
dc.description.codenESTHA
dc.identifier.isiut000235796100019
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