| | |
Summary: Accepted
M
anuscript
N
otC
opyedited
1
TRACE ELEMENTS LEACHING FROM ORGANIC SOILS STABILIZED
WITH HIGH CARBON FLY ASH
by Jacob J. Sauer1
, Craig H. Benson2
, Ahmet H. Aydilek3
, and Tuncer B. Edil4
Abstract: Leaching of four trace elements [cadmium (Cd), chromium (Cr), selenium (Se), and
silver (Ag)] from soft organic soils stabilized with high carbon fly ashes (HCFA) was assessed
using water leach tests (WLTs) and column leach tests (CLTs) on soil alone, fly ash alone, and
soil-fly ash mixtures. Concentrations from WLTs on soil-fly ash mixtures were lower than
concentrations from WLTs on fly ash alone, and were controlled more by the fly ash than the
soil. However, dilution calculations based on tests on soil alone and fly ash alone were
unreliable. Thus, leaching assessments should be conducted directly on soil-fly ash mixtures.
|
