Removal of carcinogenic benzidine from water using highly efficient carbon black prepared from sugarcane bagasse

Abstract The use of inexpensive, easily accessible, highly effective, and environmentally friendly adsorbents has been looked into as a perfect substitute for the currently expensive ways of extracting pollutants from wastewater. This study examines the potential use of carbon black (CB) obtained from sugarcane bagasse for the elimination of aromatic amines such as benzidine from simulated wastewater as it is listed as a carcinogenic agent. The contact time, adsorbent dosage, and initial benzidine concentration effects on the system were investigated. According to the findings, the proportion of benzidine removed rose as the adsorbent amount increased. The adsorption of benzidine followed a pseudo-second-order (PSOM) rate equation and fit well Langmuir (LIM) better than the other isotherm models. Maximum adsorption of benzidine on carbon black from sugar cane bagasse (CBB) (99.84%) was observed at pH 2.65 (normal pH), adsorption dose 2 g L–1, and initial concentration of 50 mg L–1 benzidine after contact time 50 min.