Dimensioning and construction of a sealing layer made of green liquor dregs amended till--Remediation of sulfidic mine waste.

Using nonhazardous industrial residues in mine waste remediation is beneficial not only for the mining industry, where substantial amounts of mine waste generated have the potential to produce acid rock drainage and pollute the environment, but also the providing industry, minimizing the landfilled waste. In this study green liquor dregs (GLD), residue from 15 different paper mills, were characterized to valorize the GLD as a potential product as a cover material. Also in the study, one of the GLDs and a local till were characterized to determine the optimal mixture of GLD amended till to be used in a field application at the closed Näsliden Mine in northern Sweden. The study concluded 10 percent GLD amended till to be the optimal recipe, and this was successfully applied at the Näsliden mine waste dump. However, the great variability in the characteristics of GLD creates challenges if it is to be valorized as a product. [ABSTRACT FROM AUTHOR]