Removal of Acid Red 88 from an Aqueous Solution Using Kaolinite Clay by Adsorption Process

Abstract

Dyes are hazardous contaminants normally found in industrial wastewaters necessitating costly and complex technologies for their removal. In this study, clay was used as an adsorbent in the removal of anionic acid red 88 (AR 88) dye from industrial wastewaters by adsorption. The dye removal efficiency and adsorption capacity of clay was studied by batch experimentation with respect to parameters of dye initial concentration, clay dosage, contact time, and pH. The dye removal efficiency of AR 88 improved with increasing dosage (r 0.9826, p < 0.05), contact time (r 0.9821, p 0.000683) and decreased with increasing initial concentration (r - 0.9168, p 0.02844) and pH (r -0.9666, p 0.007297) of the solution. At initial AR dye concentration of 100 mg/L, the removal efficiency and adsorption capacity of 89.7% and 4.38 mg/g, respectively were achieved after equilibrium time of 30 minutes under the optimum conditions of pH 2 and clay dosage 20 g/L. The study thrived in applying an efficient and low-cost adsorbent that could be used as a substitute to high-cost conventional commercial adsorbents in treating industrial wastewater with AR dye coloration

Feasibility of spent macroalgae biochar for removal of Acid Red 88 (AR) dye from its aqueous solution

“…Hence 60 min of the biochar is considered the best and most efficient contact time. Similar studies were conducted by Dadebo and Obura in which they experimented on the effect of contact time on the removal of Acid Red 88 dye using Kaolinite Clay and found that the removal efficiency increased with respect to contact time up to the point of equilibrium after which there was no increase in removal efficiency with any increase in contact time (Dadebo and Obura, 2022).…”

“…Hence 75 ppm of the AR dye is considered the best and most efficient concentration to be set before the starting of the experiment. Similar studies were conducted by Dadebo and Obura in which they experimented on the effect of initial dye concentration on the removal of Acid Red 88 dye using Kaolinite Clay and found that the removal efficiency decreased with respect to initial dye concentration due to the elevated collision between the adsorbent and adsorbate (Dadebo and Obura, 2022).…”