NDLI: Seasonal trends and potential sources of ambient air OCPs in urban and suburban areas in Dalian, China.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Li, Qingbo Wang, Xianyu Wang, Rong Sui, Hongqi Li, Wenyan Li, Lu
Spatial Coverage	China
Description	Country affiliation: China Author Affiliation: Li Q ( College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China. drlqb@yahoo.com.cn)
Abstract	A seasonal field campaign by passive sampling was conducted from February 2008 to February 2009, aiming to measure air concentrations of organochlorine pesticides (OCPs) in the urban and suburban areas in Dalian. At the urban site, similar annual average concentrations of -endosulfan and -HCH were found, both being approximately 4 times as high as those of p,p'-DDT and p,p'-DDE, while at the suburban site, the annual average concentration of -endosulfan was 2.9 times as high as the average concentrations of -HCH, p,p'-DDT and p,p'-DDE; concentrations of -endosulfan, -HCH and p,p'-DDE achieved annual peaks in summer. Back trajectory analysis revealed that the air concentration of -endosulfan increased with the input of air masses from the land whereas decreasing air concentration of -endosulfan at the urban site was associated with air masses from the sea. Pesticides used in local agriculture were identified to be major sources of -endosulfan at both the urban and suburban sites, though long-range atmospheric transport from other sources might also contribute to atmospheric levels of this chemical over this coastal city. -endosulfan, -HCH, p,p'-DDT and p,p'-DDE in the air in Dalian might result from the atmospheric transport of the air masses from northeast area, Shandong peninsula and Korean peninsula. Emission due to 'aged' DDT and HCH in contaminated local soils as well as atmospheric long-range transport were likely to be major sources of -HCH, p,p'-DDT and p,p'-DDE at the suburban site. In addition, a fresh input of -HCH and p,p'-DDT in the atmosphere could not be excluded in the urban area.
File Format	HTM / HTML
ISSN	14640325
Issue Number	6
Volume Number	13
e-ISSN	14640333
Journal	Journal of Environmental Monitoring
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2011-06-01
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Environmental Health Air Pollutants Analysis Air Pollution Statistics & Numerical Data Atmosphere Chemistry Hydrocarbons, Chlorinated Pesticides China Cities Ddt Dichlorodiphenyl Dichloroethylene Endosulfan Environmental Monitoring Instrumentation Methods Lindane Seasons Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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