Resumen

TAHIRI, Mohammed et al. Valorization of Recycling Bentonite Charged from Waste Oils Lubricants: Physicochemical Processes and Ecotoxicological Study. Port. Electrochim. Acta [online]. 2023, vol.41, n.4, pp.289-300.  Epub 30-Ago-2023. ISSN 0872-1904.  https://doi.org/10.4152/pea.2023410403.

WO contain many elements that are toxic to the health and environment. WO discharge into the natural environment without any prior treatment can clog the filters in the water treatment stations, disrupting the biological purification processes. It is also forbidden to burn these fluids without pretreating them: their wild incineration releases dioxins and greenhouse gases. In WO recycling process, the final step is to pass it through a press filter containing BT oil treated at a ratio of 10:90. The pressed cake is then abandoned in nature, or transported to the landfill. This study focused on the reuse of BT mud cakes soiled with impurities from recycled WO. A PC study of the pulp properties, followed by a toxicological study, enabled to recommend the reuse of this slurry mud as a tight and very suitable soil covering. Thus, controlled landfills, sports fields and storage tanks for irrigation water can be coated with this compact clay, and prevent seepage into the water table. Our work is divided into two main parts: the first concerned the study of the specific characteristics of BT extracted from WO (permeability, specific surface, porosity, adhesion to the ground and durability); and the second carried out the bacteriological and eco-toxicological study of BT-WO residues, in order to prevent all negative impacts likely to reduce the quality of the soil, groundwater, human health and vegetation.

Palabras clave : WO; surface area; permeability, porosity; waterproofing; eco-toxicity; BT and floor covering.

        · texto en Inglés     · Inglés ( pdf )