CUED Publications database

Relating monolithic and granular leaching from contaminated soil treated with different cementitious binders.

Kogbara, RB and Al-Tabbaa, A and Stegemann, JA (2013) Relating monolithic and granular leaching from contaminated soil treated with different cementitious binders. J Environ Sci Health A Tox Hazard Subst Environ Eng, 48. pp. 1502-1515.

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Abstract

This work employed a clayey, silty, sandy gravel contaminated with a mixture of metals (Cd, Cu, Pb, Ni and Zn) and diesel. The contaminated soil was treated with 5 and 10% dosages of different cementitious binders. The binders include Portland cement, cement-fly ash, cement-slag and lime-slag mixtures. Monolithic leaching from the treated soils was evaluated over a 64-day period alongside granular leachability of 49- and 84-day old samples. Surface wash-off was the predominant leaching mechanism for monolithic samples. In this condition, with data from different binders and curing ages combined, granular leachability as a function of monolithic leaching generally followed degrees 4 and 6 polynomial functions. The only exception was for Cu, which followed the multistage dose-response model. The relationship between both leaching tests varied with the type of metal, curing age/residence time of monolithic samples in the leachant, and binder formulation. The results provide useful design information on the relationship between leachability of metals from monolithic forms of S/S treated soils and the ultimate leachability in the eventual breakdown of the stabilized/solidified soil.

Item Type: Article
Uncontrolled Keywords: Construction Materials Gasoline Hydrocarbons Hydrogen-Ion Concentration Metals, Heavy Soil Pollutants Water Pollutants, Chemical
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:45
Last Modified: 13 Oct 2014 01:16
DOI: 10.1080/10934529.2013.796824