BROWSE

Related Researcher

Author

Choi, Sung-Deuk
Environmental Analytical Chemistry Lab (EACL)
Research Interests
  • Persistent organic pollutants, Environmental Analysis and monitoring, Multimedia modeling

ITEM VIEW & DOWNLOAD

Atmospheric deposition of persistent organic pollutants to the East Rongbuk Glacier in the Himalayas

Cited 22 times inthomson ciCited 20 times inthomson ci
Title
Atmospheric deposition of persistent organic pollutants to the East Rongbuk Glacier in the Himalayas
Author
Kang, Jung-HoChoi, Sung-DeukPark, HyokeunBaek, Song-YeeHong, SungminChang, Yoon-Seok
Keywords
Persistent organic pollutants; Himalayas; Snow; Long-range atmospheric transport
Issue Date
200912
Publisher
ELSEVIER SCIENCE BV
Citation
SCIENCE OF THE TOTAL ENVIRONMENT, v.408, no.1, pp.57 - 63
Abstract
To assess levels and seasonal trends of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in a high-altitude mountain region, a 2.1 in snowpack sample was collected from the East Rongbuk Glacier at 6572 ma.s.l. on Mt. Everest in September 2005. This snowpack covered a full year period from the fall of 2004 to the summer of 2005 and reflected the major meteorology of the monsoon and non-monsoon seasons. The most abundant compounds detected in the snow samples were gamma-hexachlorocyclohexane (gamma-HCH) and alpha-HCH with mean concentrations of 123 pg L(-1) and 92 pg L(-1), respectively. This is the first detection of these compounds in recent snow samples from the Himalayas. Backward air trajectory analysis indicated that the Himalayas could be influenced by the major HCH source regions in both India and China. Among the seven marker PCB congeners (PCB 28, 52, 101, 118, 138, 153, and 180) quantified, PCB 28 and PCB 52 were the only dominant PCB congeners detected, with mean concentrations of 17 pg L(-1) and 6 pg L(-1). respectively. In addition, DDT metabolites, p,p'-DDE and p,p'-DDD were detected in some snow samples and mean concentrations of DDTs were 24 pg L(-1). Seasonal differences were observed for alpha- and gamma-HCH concentrations increasing from the non-monsoon season to the monsoon season. Meanwhile, PCB 28 and HCB showed uniform variations with peak concentrations resulting from an effective scavenging by snowfalls between the monsoon and non-monsoon interval. Compared to other high mountain areas, the levels of POPs deposited into the East Rongbuk Glacier were relatively low, resulting from the highest altitude and remoteness from source regions.
URI
Go to Link
DOI
http://dx.doi.org/10.1016/j.scitotenv.2009.09.015
ISSN
0048-9697
Appears in Collections:
UEE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU