Spatial and seasonal variations of atmospheric organochlorine pesticides along the plain-mountain transect in central China:regional source vs. long-range transport and air–soil exchange

Qu, Chengkai and Xing, Xinli and Albanese, Stefano and Doherty, Angela L. and Huang, Huanfang and Lima, Annamaria and Qi, Shihua and De Vivo, Benedetto (2015) Spatial and seasonal variations of atmospheric organochlorine pesticides along the plain-mountain transect in central China:regional source vs. long-range transport and air–soil exchange. Atmospheric Environment, 122. pp. 31-40. ISSN 1352-2310

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Abstract

Polyurethane foam (PUF) disk passive air samplers (PAS) were deployed to measure spatiality and seasonality of atmospheric OCPs in Jianghan Plain (JHP) and Western Hubei Mountain (WHM), to make a preliminary explorative study of the source–sink relationship of organochlorine pesticides (OCPs) and their association with the monsoon. The concentrations of individual OCPs in the JHP were generally higher than those in the WHM. Significantly high levels of DDTs and Endosulfan were found in the spring and summer, HCB was found in autumn and winter, and HCHs displayed uniform distributions. Compared with the levels of 2005, a significant decrease of atmospheric HCHs, DDTs and HCB was observed, whereas an increase in Endosulfan was observed. The air–soil equilibrium status of OCPs suggested that Dajiuhu (DJH) soils are likely to be a sink for OCPs, and JHP soils are acting as the emitter, contaminating the atmosphere at certain monitoring stations. Backward air trajectory analysis demonstrated that the seasonal fluctuation of atmospheric DDTs, HCB and Endosulfan at the DJH site were closely associated with the variations of the East Asian monsoon.

Item Type:
Journal Article
Journal or Publication Title:
Atmospheric Environment
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1902
Subjects:
ID Code:
81172
Deposited By:
Deposited On:
22 Aug 2016 07:46
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Jul 2020 02:32