keywords: Chromium, adsorption, wastewater, kaolin, adsorbent
In this study, an adsorbent was developed for the treatment of industrial wastewater using the kaolin sourced from Bauchi, Nigeria. The derived adsorbent was employed in the removal of chromium metal from simulated industrial wastewater. Some batch adsorption experiments were conducted for the treatment of wastewater after which the effects of pH, adsorbent dosage, contact time and initial concentration on adsorption were investigated. The finding from the studies indicated that kaolinite clay is a promising adsorbent for the removal of chromium from wastewater due to its high adsorption capacity. The adsorption process was found to be strongly dependent on the pH of the metal solution and the maximum chromium adsorption was observed at pH 6. In the assessment of concentration effects, 99.77% was found to be the highest removal efficiency. Relatively, required adsorbent dose of 0.20 g. The contact time for effective chromium removal was 30 min.