Three-Year Atmospheric Monitoring of Organochlorine Pesticides and Polychlorinated Biphenyls in Polar Regions and the South Pacific

XAD-2 resin based passive air samplers (PAS) were deployed for three one-year periods at the Korean polar and South Pacific research stations at Ny-Alesund (2005-2009), King George Island (2005-2007), and Chuuk (2006-2009) to investigate long-range transport, local sources, and temporal trends of or...

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Bibliographic Details
Published in:Environmental Science & Technology
Main Authors: Baek, SY, Choi, SD, Chang, YS
Other Authors: 환경공학부, 10086108
Format: Article in Journal/Newspaper
Language:English
Published: AMER CHEMICAL SOC 2011
Subjects:
PERSISTENT ORGANIC POLLUTANTS
LONG-RANGE TRANSPORT
AMBIENT AIR
SEASONAL-VARIATIONS
ARCTIC ATMOSPHERE
TEMPORAL TRENDS
ANTARCTICA
ISLAND
PCBS
HEXACHLOROCYCLOHEXANES
ENDOSULFAN
CHLORDANE
Arctic
King George Island
Pacific
Antarc*
Antarctica
Online Access:https://oasis.postech.ac.kr/handle/2014.oak/17386
https://doi.org/10.1021/ES1042996
Description
Summary:XAD-2 resin based passive air samplers (PAS) were deployed for three one-year periods at the Korean polar and South Pacific research stations at Ny-Alesund (2005-2009), King George Island (2005-2007), and Chuuk (2006-2009) to investigate long-range transport, local sources, and temporal trends of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs). The highest hexachlocyclohexane (HCH) concentration (35.2-78.9 pg.m(-3)) over the entire sampling period was detected at Ny-Alesund, in the Arctic. alpha-HCH was the dominant OCP (31.1-67.1 pg.m(-3)), contributing about 50% of the total OCP load. Additionally, a high and consistent alpha/gamma-HCH ratio was observed at Ny-Alesund. HCHs might reach Arctic sites more easily than other OCPs from surrounding countries through long-range atmospheric transport (LRAT). Interestingly, high levels of the current-use OCP endosulfan-particularly endosulfan-I-were detected at almost all sampling sites, including in Antarctica, ranging 12.2-88.5, 17.7-130, and ND-59.7 pg.m(-3) at King George Island, Ny-Alesund, and Chuuk respectively. Specific OCP and PCB patterns, such as low trans/cis-chlordane ratios and a prevalence of lighter PCB congeners, were observed in all three regions (excepting one site at Ny-Alesund and one site in the South Pacific affected by local sources) during all sampling periods. This indicates that these Polar and remote South Pacific sites are mainly influenced by LRAT. Over the entire sampling period, a decreasing trend of HCHs (alpha- and gamma-HCH) and an increasing trend of endosulfan-I were observed at the Ny-Alesund sites. X 1 1 50 52 scie scopus

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