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EC number: 214-604-9
CAS number: 1163-19-5
Soil was collected from 3 research stations
(reference plots and sewage-sludge-amended plots) and 2 farms (reference
and amended/flooded soils) in Sweden. [BDE209] in background (reference)
soils ranged from 0.015 -0.75 ng/g dw, except for 1 farm which was
impacted by river sediment flooding was 1.9 ng/g dw. At the 3 research
stations which had been amended with sewage sludge, the concentrations
ranged from 0.028 -1.0 ng/g dw. One farm where sewage-sludge had been
applied had [BDDE209] of 2200 ng/g dw. The other farm which was
periodically flooded by the River Visken, which received effluents from
textile industries, had [BDE209] of 350 ng/g dw. The farm with the
highest [BDE209] had last recieved sludge application 20 yr prior to
sampling. The authors concluded no evidence of photolytic breakdown of
BDE209 was seen based on the chromatograms of the soils, in contrast to
their previous work indicating photolytic debromination of BDE209
applied to "artificially to soil with solvent in laboratory and field
experiments (Soderstrom et al. 2004). Further, laboratory experiments
with the high-BDE209 -soil showed no change in peak patterns with the
lenght of UV exposure. The authors indicated soil ageing ahs been shown
to encapsulate and shield contminants so they are less accessible to
microbial breakdown, and also probably sunlight. The fact that the soils
were plowed under was also thought to impact sunlight exposure. The
authors concluded "The results with soils collected in the field show
the importance of following up laboratory studies with field studies."
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