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  4. Bindungsformen von Schwermetallen in Baggerschlämmen
 
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Bindungsformen von Schwermetallen in Baggerschlämmen

Citation Link: https://doi.org/10.15480/882.399
Other Titles
Chemical forms of heavy metals in dredged materials
Publikationstyp
Journal Article
Date Issued
1982
Sprache
German
Author(s)
Förstner, Ulrich 
Calmano, Wolfgang  
Institut
Umwelttechnik und Energiewirtschaft V-9  
TORE-DOI
10.15480/882.399
TORE-URI
http://tubdok.tub.tuhh.de/handle/11420/401
Journal
Vom Wasser  
Volume
59
Start Page
83
End Page
92
Citation
Vom Wasser 59 (1982), 83-92
For the assessment of the environmental compatability of dredged materials contaminated by heavy metals, a six-stage chemical leaching process was developed that avoids some inadequacies of earlier experiments. Investigations of dredged sludge from Rotterdam Harbour, from the Weser River Estuary and from the middle course of the Neckar River show that the cation exchangeable metal portion is significant only for cadmium and that the highest enrichment of metals occurs either in easily reducible or carbonate-associated forms (zinc and cadmium) or in moderately reducible phases (copper and lead). In contrast to the dredged material samples sewage sludge shows markedly higher contents of cadmium, copper and lead bound on organic phases. Generally the availability for short- and middle-term chemical processes or for biogenic uptake increases with intesity of anthropogenic metal input. However, this trend is superposed by effects that are specific to the element in question, the type of soil and the organism species. A uniform assessment model can therefore not yet be established on the basis of extraction chemical data.
DDC Class
550: Geowissenschaften
Lizenz
http://doku.b.tu-harburg.de/doku/lic_ohne_pod.php
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