In wood impregnation industry, chromated cupper arsenates (CCA) were commonly used as wood preservative. Different steps in impregnation process have resulted in soil contaminated with arsenic. Landfilling is a commonly used strategy to remediate As contaminated areas and a great deal of the treatment costs consists of transportation and landfilling fees. Recently, the Landfill Directive, which is setting standards on waste to be landfilled, has been reformed. The reformation has paved the way for new techniques to treat contaminated soil, such as soil washing.
The main of the project is to evaluate if soil washing is a sound technique to remediate CCA contaminated soil. Further, to identify a chemical to enhance the performance of soil washing and to find a suitable strategy to treat As polluted washing solution.
It is not sustainable to landfill soil while reuse of inert-classified treated soil could reduce the use of natural material. The aim of the project is to assure that the washed soil has no negative effect on the ecosystem. This would establish the method as a potential treatment method that can be used by soil remediation companies. Finally, reducing the remediation cost would enable the treatment of more sites within society’s limited budget.
This project is financially supported by the Swedish Research Council for Environment, Agricultural Science and Spatial Planning (FORMAS).
Lea Rastas Amofah
Tel. +46 (0)920-49 31 49