A. Kontopoulos

TL;DR: In this article, the authors present the current state of development of the passive mine water treatment technologies and the background of passive treatment is reviewed and the chemical and biological processes involved in metals removal and acidity neutralisation are detailed.

TL;DR: The mechanism of dissolution comprises three distinct steps: (1) adsorption of organic ligands on the iron oxide surface; (2) non-reductive dissolution; and (3) reductive dissolution as mentioned in this paper.

TL;DR: In this paper, the removal of iron from silica sand with oxalic acid has been studied under various experimental conditions in order to optimise the process parameters and reach a high degree of iron removal at minimum operating cost.

TL;DR: In this paper, the effect of temperature, oxalate concentration and pH on hematite dissolution was studied under various experimental conditions, and it was found that the dissolution process is much faster in an inert atmosphere under visible light.

TL;DR: In this article, a rehabilitation scheme is proposed for all affected areas, aiming at deactivating the pollution sources and rehabilitating the contaminated areas with remedial actions, which involves mainly removal of toxic and heavy elements from sulphidic tailings and leachates with biosorption and biosolubilisation techniques and development of a vegetative cover on phosphogypsum, cinders and sulphidics tailings.