HR: 0800h
AN: A11A-0847    [Abstracts]
TI: Persistent Organic Pollutants in Semi-permeable Membrane Devices (SPMDs) Deployed in the Ambient Air of Alaska
AU: * Wu, T H
EM: ftthw@uaf.edu
AF: University of Alaska Fairbanks, 900 Yukon Dr. Room 194, Fairbanks, AK 99709-6160 United States
AU: Cahill, C F
EM: ffcfc@uaf.edu
AF: University of Alaska Fairbanks, 900 Yukon Dr. Room 194, Fairbanks, AK 99709-6160 United States
AB: Triolein containing semi-permeable membrane devices (SPMDs) were deployed in the ambient air of Alaska at five locations (Barrow, Poker Flat Research Range, Denali National Park and Preserve, Trapper Creek and Homer) during a one year study. Samples were screened for polychlorinated biphenyls (PCBs), polyaromatic hydrocarbons (PAHs), and organochlorine compounds (OCPs). Total PCBs ranged from 5-30 ng/SPMD for three-month time-integrated samples. Measurements of selected PAH ratios suggest mixed sources (petrogenic and pyrogenic) at the five locations. The percent ratio of pp-DDT [1,1,1-trichloro-2,2-bis(4-chlorophenyl) ethane] to total DDT (DDT and all metabolites) ranged from 17-66%. A higher percentage may indicate the presence of a fresh input of DDT into the atmosphere or non-metabolized DDT that has remained in the environment. Ratio of trans-chlordane (TC) to cis-chlordane (CC) varied from 0.7-1.2. Higher ratios of TC to CC may indicate fresh input into Alaska from various source regions during deployment of SPMDs.
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005