Adsorptive Removal of Acridine Orange Dye from Industrial Wastewater Using the Hybrid Material

Abstract

AbstractIn recent years, a lot of development and industrialization has led to the environmental pollution to a greater extent. Water pollution resulting due to toxic and non-biodegradable dyes present in the effluent of many industries related to textile, rubber, plastics, paper, cosmetics, leather is frequently seen nowadays. This research study uses hybrid material, combination of Surfactant Modified Alumina (SMA) and Surfactant modified Silica (SMS) for the removal of acridine orange dye (ACO) using the concept of adsolubilization. ACO dye is an organic dye capable of binding to the nucleic acid of various organisms. The surfactant which is used to modify the surface of alumina is Sodium Dodecyl Sulphate (SDS) which is anionic in nature whereas cationic surfactant Cetyl Trimethyl Ammonium Bromide (CTAB) is used to modify the surface of silica. The mode of analysis was batch study and the various parameters affecting the batch study of adsorption were studied. The batch studies indicated that as the dye concentration of ACO increased, the sorption capacities increased while percentage removal efficiency decreased and achieved equilibrium at 120 min contact time with 120 rpm agitation at 29 ± 2 °C. The removal efficiency of hybrid adsorbent material was around 92.5% and 81% for synthetic and real wastewater sample respectively with adsorption capacity of 46.25 mg/gm for synthetic sample and 40.5 mg/gm for the sample of real textile industry wastewater sample at adsorbent dose of 2 g/l. EDX and SEM analysis was carried out to determine the elemental composition of the adsorbent as well as to check the removal of the dye. It was concluded that the removal took place through pseudo-second-order kinetic mechanism (R2 > 0.99) and data was a good fit to the Freundlich isotherm model (R2 > 0.998).KeywordsSurfactant modified aluminaSurfactant modified silicaAcridine orange dyeAdsorptionBatch study