Since it was found that leaching is not diffusion controlled, the long-term leaching behaviour was not assessed.
Long-term leaching experiments are crucial to estimate the potential release of dangerous substances from construction materials.
Thus, a modified relation is developed based on the stochastic leaching analysis, which generates accurate predictions for both the short-term and long-term leaching.
In terms of the leaching of metals (Pb, Zn, Cu) and metalloids (As, Sb), the secondary slag mostly fulfils the limit criteria for inert waste according to the EU legislation even for long-term leaching.
By performing the stochastic leaching analyses, numerical results suggest the overwhelming influence of the physical uncertainty on long-term leaching, while the impact of chemical uncertainty is more evident in terms of short-term leaching.
Results showed that magnetite powder was bound tightly to loessial soil aggregates, with no noticeable vertical mobility under long-term leaching conditions, and almost synchronous detachment with the eroded soils.
The findings of this study promote the quantitative consideration of environmental impacts of long-term leaching in Life Cycle Assessment, complementing site-specific risk assessment, for the design of waste management strategies, particularly in the construction sector.
Coarse and fine samples of a Class F fly ash obtained from commercial combustion of Illinois bituminous coal have been exposed to two long-term leaching tests designed to simulate conditions in waste impoundments.
When the dead leaflet material is ultimately detached, its quality will be disparate from that of other forms of litter due to preferential long-term leaching of soluble materials like potassium, phosphorus, sugars, and phenolics.
More rigorous analysis of the leachate chemistry of selected long-term leach tests also suggests possible cover design criteria based on the maximum AGR that will maintain a pH > 4 in leachate from ARD materials.
