| View Larger Image | Levels of persistent organic pollutants in air in China and over the Yellow Sea [An article from: Atmospheric Environment] | Digitalby G. Lammel (Author), Y.S. Ghim (Author), A. Grados (Author), H. Gao (Author), Huhnerfus (Author)
| List Price: | $10.95 | | | Available: | Available for download now |
| | Binding: | Digital | | Publisher: | Elsevier | | Page Count: | 12 Pages | | Publication Date: | January 01, 2007 |
|
EDITORIAL REVIEWS |
Product Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: The occurrence of persistent toxic substances (PTS) in China and possibly their regional transport in the Yellow and East China Seas region was studied. Organochlorines in atmospheric gas-phase and particulate matter were collected by high-volume sampling (filters and polyurethane foams) during 2 weeks in June 2003 (dry season) simultaneously at a Yellow Sea coastal site in an urban area, Qingdao, China, and a rural island site, Gosan, Jeju Island, Korea. Using GC methods, the samples were analysed for 9 persistent organic pollutants (POPs) regulated under the global POP convention, namely aldrin, chlordane (cis- and trans-isomers CC and TC), DDT and metabolites (o,p'-DDT, p,p'-DDD, and p,p'-DDE), dieldrin, endrin, heptachlor, hexachlorobenzene (HCB), mirex and PCB (congeners number 28, 52, 101, 153 and 180), and for hexachlorocyclohexane (@a-, @b- and @c-isomers), a PTS and now considered for regulation under the convention, too. At the coastal site additionally o,p'-DDE and -DDD, @b-endosulfan, isodrin, heptachlorepoxide and @d-HCH, and at the island site additionally p,p'-DDT and 12 additional PCB congeners were analysed. 9 samples were collected at the coastal and 15 (for PCBs 5) at the island site. Long-range advection pathways were determined based on analysed back-trajectory calculations. The mean concentrations of DDT and its metabolites, HCB, HCH, and PCB at the coast were in the 100-1000pgm^-^3 range. Higher concentrations prevailed during nighttime. The levels were in general lower at the island site, but not for DDT. Local sources are likely. PCBs were even 2 orders of magnitude lower, suggesting that PCBs are not subject to regional transport but elevated concentrations in air are limited to the source areas. Organochlorine pesticide levels on the other hand were seemingly determined by regional transport over Mainland China rather than by emissions in the coastal area. The currently used pesticides mirex and chlordane were found at elevated levels, i.e. 79 (6.6-255) and 36 ( |
|
![Levels of persistent organic pollutants in air in China and over the Yellow Sea [An article from: Atmospheric Environment]](http://ecx.images-amazon.com/images/I/51C4M48N0CL._SL160_.jpg)
