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Summary: Transport and fate of dieldrin in poplar and willow
trees analyzed by SPME
Serena V. Skaates a
, Anu Ramaswami b,*, Larry G. Anderson a
a
Department of Chemistry, University of Colorado at Denver, Denver, CO 80202, USA
b
Department of Civil Engineering, University of Colorado at Denver, P.O. Box 173364, Denver, CO 80202, USA
Received 13 July 2004; received in revised form 2 March 2005; accepted 7 March 2005
Available online 12 May 2005
Abstract
Dieldrin is a hydrophobic organochlorine insecticide that is persistent in the environment. The fate and transport of
dieldrin in trees is important both in the context of potential remediation, as well as food chain impacts through dieldrin
transport to shoots and leaves. Experiments were conducted to measure the degree of dieldrin partitioning to plant tis-
sue and the potential for biodegradation of dieldrin in the microbe rich tree rhizosphere. Dieldrin was analyzed in water
and plant tissue using headspace solid-phase microextraction (SPME) coupled with gas chromatography. Poplar and
willow saplings planted in soil and watered with 10 lg lÀ1
dieldrin for up to 9 months showed no adverse effects due
to dieldrin exposure and no dieldrin was observed in plant shoots with a method detection limit (MDL) of 7 ng gÀ1
.
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