Abstract
Chromium (Cr) is a major pollutant found in tannery effluent is detrimental to human health and the ecosystem. The present research aimed to remove Cr from tannery wastewater using corn-cobs as adsorbent. The tannery wastewater was collected from one of the tannery industries in Kano, Nigeria. APHA 2012 method was employed in establishing the physicochemical properties of the sampled wastewater. Using the batch method, effect of adsorbent dosage, pH and contact time on the adsorption of Cr by corn-cob was determined. Results show that the percentage removal of Cr from the wastewater ranging from 67% to 87% was obtained by using the adsorbent. However, the contact time (0, 10 and 20 minutes) of the adsorbent had significant (p<0.05) difference on the concentrations (65.60, 37.65 and 25.38 mg/L) of Cr removed from the sampled tannery wastewater respectively. In conclusion, corn-cob has shown be an efficient adsorbent in the removal of Cr from wastewater.
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