Improved removal and decolorization of C.I. anionic reactive yellow 145 A dye from water in a wide pH range via active carbon adsorbent-loaded-cationic surfactant

A fast and highly efficient method was developed for decolorization of C.I. anionic reactive yellow 145 A dye from wastewater under a wide pH range (1.0-13.0) using a loaded cationic surfactant on the surface of an active carbon adsorbent (HTAB-AC). The efficiency of dye removal by the proposed adsorbent was studied by the batch equilibrium technique under the influence of various controlling experimental factors such as adsorbent dosage, contact time, and initial dye concentration. The determined percentage removal values of reactive yellow 145 A dye by (HTAB-AC) adsorbent in the examined solutions were found 92.5-99.6, 90.7-98.1, and 88.5-96.9% for 120, 150, and 180 mg L-1 solutions, respectively. The equilibrium of removal (93.0-96.0%) was established at 20.0 min of shaking time. The effects of other system variables were evaluated and the adsorption behavior was investigated by the Langmuir and Freundlich models. Adsorption kinetic data were tested using pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. Successful removal (90.2-97.6%) was accomplished in the presence of various pH values from real industrial wastewater samples.