Heavy Metals and Metalloids Leachability from Composite Ground Materials Peat – Fly Ash – Lime

Abstract

This publication presents the test results of heavy metals and metalloids leachability from ground composite materials. The components of the obtained composites are peat and stabilizing binders in the form of fly ash and hydrated lime. The composites were designed to be used to stabilize low-bearing organic soil in the Lake Druzno basin in the area of Żuławy Elbląskie. The results of the leachability studies show that as the lime hydrated in the composition of the composite increases, the leachability of heavy metals and metalloids decreases. The decrease in the leachability of these elements is also influenced by the increase in the pH value. The results of heavy metals and metalloids leachability from composites as well as the obtained pH values make it possible to conclude that they are neutral to the ground environment and can be used in engineering practice under specific conditions in the area of Żuławy Elbląskie.

Shear Strength of Organic Soils Modified by Mineral Materials

“…Complementary tests of fly ash, such as leachability of heavy metals, hydrogen ion content and determination of radioactivity, were carried out, as demonstrated in the earlier papers (Brzeziński 2020, Brzeziński & Iskra-Świercz 2021, Brzeziński et al 2023. They showed complete safety and harmlessness of this material for the natural environment.…”