Journal Article
Passive sampling of bioavailable organic chemicals in Perry County, Missouri cave streams
Fox, J.T., Adams, G.L., Sharum, M.and Steelman, K.
Record Number:
3677
Year:
2010
Journal:
Environmental Science and Technology
Pages:
8835-8841
Volume:
44
Abstract:
Two types of passive samplersssemipermeable membrane
devices(SPMDs)andpolar organic chemical integrative samplers
(POCIS)—were deployed in spring 2008 to assess bioavailable
concentrations of aquatic contaminants in five cave streams
and resurgences in Perry County, Missouri. Study sites represent
areas of high cave biodiversity and the only known habitat
for grotto sculpin (Cottus carolinae). Time-weighted average
(TWA) water concentrations were calculated for 20 compounds
(n ) 9 SPMDs; n ) 11 POCIS) originating primarily from
agricultural sources, including two organochlorine insecticides,
dieldrin and heptachlor epoxide, which were found at levels
exceeding U.S. EPA criteria for the protection of aquatic life. GIS
data were used to quantify and map sinkhole distribution
and density within the study area. Infiltration of storm runoff
and its influence on contaminant transport were also evaluated
using land cover and hydrological data. This work provides
evidence of cave stream contamination by a mix of organic
chemicals and demonstrates the applicability of passive samplers
for monitoring water quality in dynamic karst environments
where rapid transmission of storm runoff makes instantaneous
water sampling difficult.
Times Cited:
1
Relevent Species: