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Polychlorinated Dibenzo-p-dioxin and Dibenzofuran Concentration Profiles in Sediments and Flood-Plain Soils of the Tittabawassee River, Michigan.
- Source :
-
Environmental Science & Technology . 2/1/2003, Vol. 37 Issue 3, p468. 7p. 3 Charts, 11 Graphs, 1 Map. - Publication Year :
- 2003
-
Abstract
- Concentrations of polychiorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) in sediments and floodplain soils collected along the Tittabawassee River in Michigan ranged from 102 to 53 600 pg/g, dry wt. Mean PCDD/ PCDF concentrations in downstream sediment and soil were from 10- to 20-fold greater than those found at locations upstream of Midland, Michigan. Concentrations of PCDD/ PCDF in sediments and flood-plain soils from the Tittabawassee watershed were comparable to those found in industrialized areas such as the Housatonic and lower Passaic Rivers in the U.S. Concentrations of PCDDs/ PCDFs in soil and sediment were not correlated with total organic carbon (TOC) in sediments or soils. OCDD and 2,3,7,8-TeCDF were the predominant congeners in sediment/soil collected from locations downstream of Midland, Michigan. Principal component analysis of the PCDD/ PCDF congener profile suggested the presence of sources originating from a mixture of chlorophenol and other chlorinated compound production. Mass balance analysis of TCDD equivalents (TCDD-EQs) derived from H4IIEluc bioassay of sediment extracts and 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQs) estimated from instrumental analysis suggested that PCDDs/PCDFs were the major dioxin-like compounds present in sediments. A significant correlation existed between bioassay-derived TCDD-EQs and instrumentally measured TEQs (r² = 0.94). [ABSTRACT FROM AUTHOR]
- Subjects :
- *POLYCHLORINATED dibenzodioxins
*POLYCHLORINATED dibenzofurans
*SOILS
Subjects
Details
- Language :
- English
- ISSN :
- 0013936X
- Volume :
- 37
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Environmental Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 9108409
- Full Text :
- https://doi.org/10.1021/es020920c