Stability assessment of iron treated CCA contaminated soil

CCA (chromated copper arsenate) is a chemical used to protect wood from fungal, bacterial and insect attack. Soil contamination by CCA is common in the surroundings of wood preservation. Nowadays, conventional techniques as landfilling and excavation are commonly used in order to remediate this contamination. New and cheaper techniques as In situ stabilization of the contaminated soil are being studied lately, it consist on adding an additive to the soil in order to reduce ,by changing the speciation of the element, the mobility of the elements which are contaminating the soil and thus reduce its availability. The additive that has been used in this thesis is zeronvalent iron. This thesis investigates how environmental factors such as pH, redox potential, liquid to solid ratio, microbial activity and organic matter affect the stability of the zerovalent iron treated soil in order to predict the behavior of the treated soil under different environmental conditions. Also this thesis is aimed to make an attempt to predict a long- term behavior of the stabilized soil.Validerat; 20101217 (root