Heavy metal removal from contaminated sludges with dissolved sulfur dioxide in combination with bacterial leaching

Link:
Autor/in:
Verlag/Körperschaft:
Hamburg University of Technology
Erscheinungsjahr:
1983
Medientyp:
Text
Schlagwort:
  • 500
Beschreibung:
  • Treatment of dredged sludge from the Hamburg harbour area with sulfurous acid (6%) shows nearly complete removal of Cd, Zn, and Mn within the first 10 minutes. Within 1 hour more than 50% of Cr, Ni, Pb and Hg are mobilized; dissolution of Cu and Fe reaches about 40%. The capability of certain bacteria (Thiobacillus thiooxidans and Thiobacillus ferrooxidans) to oxidize sulfur and ferrous iron respectively, while decreasing the pH value from 4-5 to about 2 was utilized for enhancing dissolution of metals from dredged sludge. Acidification with sulfurous acid to pH 4 and following bacterial leaching solubilized the following metal percentages from the dredged material: Cd and Co = 98%, Zn = 95%, Mn = 91%, Cu = 84%, Ni = 66%, Cr = 45%, Fe = 27% and Pb = 17 %.
Lizenzen:
  • info:eu-repo/semantics/openAccess
  • http://doku.b.tu-harburg.de/doku/lic_ohne_pod.php
Quellsystem:
TUHH Open Research

Interne Metadaten
Quelldatensatz
oai:tore.tuhh.de:11420/412