Details zur Publikation

Referenztyp Zeitschriften
DOI / URL
Titel (primär) Konditionierung schwermetallbelasteter Gewässersedimente durch Pflanzen. Plant conditioning of aquatic sediments contaminated by heavy metals
Autor Zehnsdorf, A.; Löser, C.; Hoffmann, P.; Seidel, H.;
Journal / Serie Wasser & Boden
Erscheinungsjahr 2001
Department UBT; UBZ; SAN;
Band/Volume 53
Heft 11
Sprache deutsch;
UFZ Bestand Z, Magdeburg - Bibliothek, Zeitschriften, 22.1970 - 55.2003
Abstract When dredged sediments contaminated by heavy metals are exposed to air, the metals become partly soluble and the material turns into an environmental risk. As an alternative to disposal of dredged sludge in landfills, a cleansing process based on solid-bed bioleaching is under development. Solid-bed leaching works only on materials easily permeable by both air and water. Unfortunately, freshly dredged sediment is impermeable and thus unsuitable for solid-bed leaching. Therefore, the structure of the contaminated sediment must be altered in a preliminary conditioning step. The SECON plant, constructed for practical-scale conditioning experiments, can accommodate sediment packages of up to 2 m in thickness. Four treatment basins were each filled with 44 m3 of freshly dredged, silty sediments from the Weisse Elster River. One basin was planted with reed (Phragmites australis), a second one with reed canary grass (Phalaris arundinacea). The sediment in the third basin was exposed to spontaneously developing plants while the sediment in the fourth basin was kept free of vegetation. During one vegetation period, large amounts of water were extracted by evapotranspiration. As a result, cracks and cavities developed within the package through which air penetrated and oxidized the sediment. Plant root and microbe activities transformed the sludge into a crumbly, soil-like material.
ID 6957
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=6957
Zehnsdorf, A., Löser, C., Hoffmann, P., Seidel, H. (2001):
Konditionierung schwermetallbelasteter Gewässersedimente durch Pflanzen. Plant conditioning of aquatic sediments contaminated by heavy metals
Wasser Boden 53 (11), 33 - 40