Matter nonextractable particulate

Samples Tla and Tib were higher contaminated by halogenated naphthalenes as compared to samples T2 and T3. With respect to the nonextractable particulate matter the occurrence of halogenated naphthalenes was limited to the extracts obtained after alkaline hydrolysis. 

With respect to the spatial distribution and the different selectivity of the degradation methods a second differentiation was observed. Most contaminants appeared frequently and independently of the kind of degradation procedure applied. Also a preferred occurrence at individual sampling locations was not observed for most of the substances. Considering additionally the specifity of the degradation reactions as well as the molecular structures of the contaminants investigated a weaker noncovalent association to the nonextractable particulate matter has to be stated for these compounds. 

Schwarzbauer J, Ricking M, Littke R (2003a) DDT-related compounds bound to the nonextractable particulate matter in sediments of the Teltow Canal, Germany. Environ Sci Technol 37, 488-495. 

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