The contamination of soil with elements coming from the slurry composition is of a major importance and it is put under strict environmental regulations. Among these elements, the heavy metals are of special concern, considering the serious damages it produces, even at very low concentrations.
This paper presents a study, made on two different samples of slurry, with different heavy metals compositions, that involves three techniques of reducing the heavy metals content. The experiments were done using extraction in static and in dymanic regime, as well as the technique of free flow. As extraction liquids, it was used water, an acid solution and an alkali solution.
The study concludes with an estimation of the efficiency of the three techniques, comparing also the effectiveness of the extraction liquids for both samples of slurry.