Activated Algerian kaolins as low-coast potential adsorbents for the removal of Derma Blue R67 acid dye

Abstract

International audienceThere are significant amounts of unused dyes remaining in wastewater from dyeing industry. The release of these effluents causes abnormal coloration of surface waters and there is a risk of toxicity. This research involved the efficient adsorption of anionic dyes (Bleu Derma R67) by local natural and treated clay; Djebel Debagh (DD3) and Tamazert (KT2) a low-cost materials abundant in highly weathered soils from Algerian East. Adsorption experiments were accomplished using acid dye adsorbed on activated kaolins (DD3 and KT2) by acid treatment. These two clays were first treated by acid in order to enhance their retention capacities, and then characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), surface area measurements (BET method), surface charge (PZNPC), and electrophoretic mobility (Zetaphoremeter). Preferred format: Poster Session number and name: B2 : Environment and geological process "The role of clays and modified clays in remediating environmental pollutants"