| Seasonal variation of organochlorine pesticides in the gaseous phase and aerosols over the East China Sea | |
| Tianyi Ji; Tian Lin; Fengwen Wang; Yuanyuan Li; Zhigang Guo | |
| 2015 | |
| Source Publication | Atmospheric Environment
 |
| Volume | 109Issue:1Pages:31-41 |
| Abstract | Eighty paired gaseous phase and PM2.5 (particulate matter < 2.5 gm in diameter) samples, covering four seasons from October 2011 to August 2012 were collected simultaneously from a remote island in the East China Sea (ECS). The samples were analyzed for organochlorine pesticides (OCPs) to determine their seasonal variation and potential sources over the coastal marine environment. The concentrations of individual OCPs in the PM2.5 samples were higher in winter and lower in summer, and the reverse trend was observed for the measured OCP compounds (except hexachlorocyclohexanes, HCHs) in the gaseous phase. Principal component analysis revealed one trend that contributed 40% to PM2.5-bound OCPs characterized by beta-HCH, alpha-HCH, p,p'-dichlorodiphenyldichloroethane (p,p'-DDD), p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE), and chlordanes; whereas two seasonal trends, represented by dichlorodiphenyltrichloroethanes (DDTs) or chlordanes and HCHs, were responsible for 38% and 23% of the gaseous OCPs, respectively. Continental outflow driven by the East Asian monsoon brought large quantities of particulate OCPs to the ECS, especially in winter. Possible fresh sources or net volatilization from the Yangtze River induced by both higher ambient temperature and higher discharge rates caused the higher gaseous DDT and chlordane levels observed in summer. However, the lower concentrations of gaseous HCHs observed in summer suggested that net volatilization had a relatively limited impact on gaseous HCHs due to the long-term prohibition of their use and their low residual levels in the catchment, whereas the elevated concentrations of gaseous HCHs in winter controlled by gas particle partitioning, resulted from increased particulate HCHs producing a partial shift to gaseous HCHs over ECS. |
| Keyword | Ocp Gaseous Phase Aerosols Seasonal Variation Source East China Sea |
| Subject Area | 环境地球化学 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/5933 |
| Collection | 环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文 |
| Recommended Citation GB/T 7714 | Tianyi Ji,Tian Lin,Fengwen Wang,et al. Seasonal variation of organochlorine pesticides in the gaseous phase and aerosols over the East China Sea[J]. Atmospheric Environment,2015,109(1):31-41. |
| APA | Tianyi Ji,Tian Lin,Fengwen Wang,Yuanyuan Li,&Zhigang Guo.(2015).Seasonal variation of organochlorine pesticides in the gaseous phase and aerosols over the East China Sea.Atmospheric Environment,109(1),31-41. |
| MLA | Tianyi Ji,et al."Seasonal variation of organochlorine pesticides in the gaseous phase and aerosols over the East China Sea".Atmospheric Environment 109.1(2015):31-41. |
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