Red mud is a waste generated by the extraction of aluminum from bauxite by the Bayer process. The amount of red mud produced is very large and requires a wide area for disposal. Although not classified as a hazardous waste, red mud has the potential to cause contamination of surface water and groundwater and can also cause caustic rainfalls, reaching the vegetation and animals in neighboring regions. With growing concern to reduce waste generation in industrial and find technologies that allow the reuse of waste generated, there is the alternative of using red mud as adsorbent for heavy metal in treatment of contaminated areas and wastewater. This study aimed to analyze the influence of pH variation in adsorption of Ni and Zn, besides finding the equilibration time and analyzing the reaction kinetics of adsorption of these metals by red mud. Therefore, it will be possible to perform a comparative study of the adsorption capacity between different activations of red mud and its natural form, and investigate the possible use of red mud as a low cost adsorbent for the treatment of liquid and gaseous effluents contaminated by metals.
News published in Agência FAPESP Newsletter about the scholarship: