The Durability Of Stabilized Sandy Soil
Contaminated With Pb(NO3)2
Author(s)
S. R. Zeedan, A. M. Hassan & M. M. Hassan
Abstract
The purpose of this study was to investigate the effectiveness of cement kiln dust
(CKD) and silica fume (SF) for the safe disposal of hazardous waste
contaminated sand soil with toxic heavy metal as lead nitrate (Pb (NO3)2. The
curing time and the leaching test through immersion in water are test methods for
studying the durability of the stabilized/solidified (S/S) hazardous wastes under
the soaking condition that leachate through the compacted samples. These
methods simulate the leaching by immersion process; S/S hazardous waste under
particular landfill conditions, when the S/S contaminated soil is more permeable
than its surrounding materials or when the deterioration of solidified waste has
reached a statue that ground water can flow – through the compacted soil via the
porosity system of S/S waste matrix. The sandy soil was mixed with mixture
binder (10% CKD and 2% SF) and mixed by dissolving three different ratios of
Pb(NO3)2 (O.5, 1, and 3%) in tape water and compacted. UCS was determined
for 1 and 3 month curing (100% moisture humidity) and for one year soaking in
tap water. The concentration of (Pb +2 and NO --3 ) which leachate from the
compacted samples to the soaking water was recorded along a time of one year
soaking. The UCS was decreased for the compacted samples have high levels of
lead nitrate. The leaching of Pb was decreased during the soaking time for the
two curing times (30 and 90 days) for the three ratio of Pb(NO3)2.
Keywords: solidification/stabilization, leaching, CKD, SF, heavy metal.
Keywords
solidification/stabilization, leaching, CKD, SF, heavy metal.
Related Book
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