HR: 1330h
AN: B32A-0368 [PDF]
TI: Iron mobility in acidic and iron rich sediments: From chemical equilibrium to hydrological
controls
AU: * Blodau, C
EM: christian.blodau@uni-bayreuth.de
AF: Limnological Research Station
University of Bayreuth, Universitaetsstrasse 30, Bayreuth, 95444
Germany
AB:
Retention of ferrous iron at the interface between ground- and surface water is crucial for the acidity balance of lakes
influenced by acid mine drainage. Iron budgets for two sediments with differential groundwater inflow (ca. 1 and 10 L m-2
d-1) were developed studying iron sedimentation, ground- and pore water chemistry, solid phase iron and sulfur chemistry and
mineralogy, sulfate and iron turnover, and the corresponding Gibbs free energies of the latter processes. In both areas iron
was sedimented as schwertmannite (Fe8O8(OH)x(SO4)y, 8-x = 2y, 1,0
DE: 1655 Water cycles (1836)
DE: 1845 Limnology
DE: 1871 Surface water quality
SC: Biogeosciences [B]
MN: 2003 Fall Meeting