Immobilization is one of the most effective methods for remediation of contaminated soil and waste materials. In this case, reactive additives are mixed with the contaminated material, which leads to the formation of an inert composite. For the remediation study, we used the most polluted soil from the area of the old Cinkarna in Celje, sludge from wastewater treatment and other industrial waste. We investigated the efficacy of various additives (paper ash, ash, coal ash, steel slag, and red sludge from bauxite processing) as immobilization additives. Paper ash, coal fly ash and steel slag may contain hydraulic phases that allow chemical immobilization of contaminants. The red mud was not hydraulically active and was partially neutralized. The increase in immobilization efficiency in composites over time is associated with the formation of new minerals from hydration reactions and pozzolanic reactions. Adsorption is the main mechanism of red mud immobilization. Composites with paper ash, fly ash and red mud are environmentally acceptable in terms of inertness limits, and composites with slag have exceeded the Mo limit in aqueous effluent. All composites, except those with steel slag, are potentially useful as building materials for remediation of contaminated soils in degraded areas in the form of geotechnical embankments or embankments.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 2528615The project task for the preparation of a study of potential methods for disposal or use of combustion products in TEŠ includes an analysis of the current situation in the field of installation of combustion products TEŠ and, on the basis of collected data, proposals for improving of the recycling of TEŠ products. A study of the use of ash as a construction product is included together with the possibilities of alternative ash disposal. The consortium includes an equal partner, who is in charge of the hydrogeological part and re-learning the possibility of alternative ash disposal.
F.01 Acquisition of new practical knowledge, information and skills
COBISS.SI-ID: 2571367