Quantitation of nonextractable anthropogenic contaminants released from Teltow Canal sediments after chemical degradation

The association of DDT-related pollutants to the non extractable matter of sediments from the Teltow Canal has been reported recently (Chapter 4.3.2 and Schwarzbauer et al. 2003a). This study was primarily initiated to quantify concentrations of bound 2,2-bis(chlorophenyl)-l,l,l-trichloroethane (DDT) residues in order to obtain further information about the fate of DDT-derived compounds within the particulate matter of the aquatic environment. Generally, the distribution of the bound DDT-related compounds was found to differ distinctly from the distribution within the extractable fraction (Schwarzbauer et al. 2003a). 

However, Teltow Canal sediments are not only contaminated by DDT and its metabolites (2,2-bis(chlorophenyl)-l,l-dichloroethane - DDD, 2,2-bis(chlorophenyl)-1 -chloroethane DDMS, 2,2-bis(chlorophenyl)-l, 1 -dichloroethene - DDE, 2,2-bis(chlorophenyl)-l-chloroethene DDMU, l,l-bis(chlorophenyl)ethene DDNU, l,l-bis(chlorophenyl)ethane - DDEt, bis(chlorophenyl)methane - DDM, 2,2-bis(chlorophenyl)acetonitrile DDCN) but also by halogenated aromatics and additional pesticides (e.g. bromonaphthalenes, tribromoanilines, the acaricide 2,2-bis(4-bromophenyl)-2-hydroxyacetic acid /.vo-propylcstcr - bromoproylate and the insecticide 2,2-bis(methoxyphenyl)-1,1,1-trichloroethane 

1 Mainly adapted/reprinted from Schwarzbauer et al. 2003c 

Using common extraction procedures and chemical degradation techniques as described above the extractable and nonextractable fraction of four sediment samples of the Teltow Canal were investigated. The extracts as well as the degradation products were analysed by means of gas chromatographic - mass spectrometric analyses. 

With respect to the nonextractable fraction also numerous obviously anthropogenic compounds were identified, but they were superimposed by huge amounts of degradation products derived from natural 

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Quantitation of nonextractable anthropogenic contaminants released from Teltow Canal sediments after chemical degradation ... 

Schwarzbauer J, Ricking M, Littke R (2003c) Quantitation of nonextractable anthropogenic contaminants released from Teltow Canal sediments after chemical degradation. Acta Hydrochim Hydrobiol 31, 469-481. 

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