Dyes contamination causes serious damages to the aquatic life's and human health.With increase in these persistent organic contaminants accumulation around the world, performant environmentally friendly and low cost materials and techniques are required to protect ecosystem and human. In this study, the efficacy of titania-smectite nanocomposites (Sm-TiO2 NCs) at removing indigo blue (IB) dye was assessed by both batch adsorption and hybrid treatment combining adsorption and ultrafiltration (UF) processes. During the adsorption, the effect of different parameters on IB removal such as dose of Sm-TiO2, contact time, pH and IB concentration were studied. The optimal conditions were applied for the Sm-TiO2 during dye removal using adsorption/UF hybrid treatment. At 293 K and pH 2.5, an optimized dose of Sm-TiO2 (100 mg/L) removed 73 % of the IB from a 25 mg/L solution in 240 min with an equilibrium adsorption capacity greater than180 mg/g. The adsorption of IB dye by Sm-TiO2 NCs followed Langmuir adsorption isotherm model and pseudo-secondorder kinetics. The thermodynamic studies revealed that the adsorption process was 2 spontaneous and exothermic. When a hybrid process was applied, a higher IB removal capacity has been obtained with a lower dose of Sm-TiO2 compared to the case of batch adsorption process. In addition, the presence of Sm-TiO2 NCs has been found to reduce the UF membrane fouling. In this case, the adsorption followed by UF treatment applied in two stages was modified to a single stage hybrid process. Permeate flux was increased from 71 L/h.m 2 (only UF) to 182 L/h.m 2 (Sm-TiO2/UF).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.