By Ulrich Förstner

Sediments are more and more famous as either a provider and a potential resource of contaminants in aquatic platforms, they usually can also impact groundwater caliber and agricultural items while disposed on land. 4 facets are lined reflecting the improvement of data in particle-associated pollution in the past twenty-five years: - the identity, surveillance, tracking and keep watch over of assets and distribution of toxins, - the evaluate of solid/solution kinfolk of contaminants in floor waters, - the research of in-situ strategies and mechanisms of pollutant move in a number of cubicles of the aquatic ecosystems, - the overview of the environmental impression of particle-bound contaminants, i.e. the improvement of sediment caliber standards. a last bankruptcy focusses on useful points touching on infected sediments.

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Jack- 1984). S. EPA (Ham et al°, 1979) designed for studies on the leachability of waste products consists of a mixture of sodium acetate, pyrogallol, acetic acid, glycine, and iron sulfate. , 1984) for studies on combustion residues combines batch cascade and column proce- 43 dures; the test column is filled with the material and p e r c o l a t e d by acidulated d e m i n e r a l i z e d water ting most relevant effects of acid precipitation) medium-term leaching of m a t e r i a l is extracted (<50 years).

1987) Effect of sample pretreatment on the reliability of solid speciation data of heavy metals - implication for the study of diagenetic processes. Mar. Chem. 22, 299312. 53 Landner, L. )(1987) Speciation of Metals in Water, Sediment and Soil Systems. Lecture Notes in Earth Sciences No. ii, 190 p. Berlin: Springer-Verlag. G. )(1983) Trace Element Speciation in Surface Waters and its Ecological Implications. Prec. NATO Advanced Research Workshop, Nervi/Italy, Nov. 2-4, 1981. 320 p. New York: Plenum Press.

S. )(1986) The Importance of Chemical "Speciation" in Environmental Processes. Dahlem-Konferenzen, Life Sciences Research Report 33, 763 p. Berlin: Springer-Verlag. Z. L. (1984) A sediment pore water sampler used in root zone studies of the submerged macrophyte, Myrioph¥1lum spicatum. Limnol. Oceanogr. 29, 671-673. Carignan, R. (1984) Interstitial water sampling by dialysis. Methodological notes. Limnol. Oceanogr. 29, 667-670. , Rapin, F. & Tessier, A. (1985) Sediment pore water sampling for metal analysis: A comparison of techniques.

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