Polychlorinated Dibenzo-p-dioxin and Dibenzofuran Concentration Profiles in Sediments and Flood-Plain Soils of the Tittabawassee River, Michigan

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• 作者：Klara Hilscherova ; Kurunthachalam Kannan ; Haruhiko Nakata ; Nobuyasu Hanari ; Nobuyoshi Yamashita ; Patrick W. Bradley ; John M. McCabe ; Allan B. Taylor ; and John P. Giesy
• 刊名：Environmental Science & Technology
• 出版年：2003
• 出版时间：February 1, 2003
• 年：2003
• 卷：37
• 期：3
• 页码：468 - 474
• 全文大小：242K
• 年卷期：v.37,no.3(February 1, 2003)
• ISSN：1520-5851

文摘

Concentrations of polychlorinated dibenzo-p-dioxins(PCDDs) and dibenzofurans (PCDFs) in sediments and flood-plain soils collected along the Tittabawassee River inMichigan ranged from 102 to 53 600 pg/g, dry wt. Mean PCDD/PCDF concentrations in downstream sediment and soilwere from 10- to 20-fold greater than those found at locationsupstream of Midland, Michigan. Concentrations of PCDD/PCDF in sediments and flood-plain soils from theTittabawassee watershed were comparable to thosefound in industrialized areas such as the Housatonic andlower Passaic Rivers in the U.S. Concentrations of PCDDs/PCDFs in soil and sediment were not correlated withtotal organic carbon (TOC) in sediments or soils. OCDDand 2,3,7,8-TeCDF were the predominant congenersin sediment/soil collected from locations downstream ofMidland, Michigan. Principal component analysis of the PCDD/PCDF congener profile suggested the presence ofsources originating from a mixture of chlorophenol andother chlorinated compound production. Mass balanceanalysis of TCDD equivalents (TCDD-EQs) derived from H4IIE-luc bioassay of sediment extracts and 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQs) estimated frominstrumental analysis suggested that PCDDs/PCDFs werethe major dioxin-like compounds present in sediments. Asignificant correlation existed between bioassay-derivedTCDD-EQs and instrumentally measured TEQs (r ² = 0.94).