Optimization of bromate adsorption onto Fe-CNTs nanocomposite using response surface methodology

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Abstract

This study was aimed at employing response surface methodology (RSM) for optimization of process variables and identifying optimal conditions for the adsorption of bromate (BrO3-) from contaminated water using multi-walled carbon nanotubes, based on iron hydr(oxide), Fe-CNTs nanocomposite. Fifteen experimental runs were conducted in batch mode to study the effect of individual as well as interactive process variables, i.e., pH, BrO3 − initial concentration, and adsorbent dose, on the removal of BrO3 − using Box–Behnken design (BBD) of RSM. The coefficient of determination (R2) at 98.34% indicated a good agreement between actual and predicted values. The main effect and contour plot were drawn to obtain the independent and interactive effect of operational variables on BrO3 − uptake. A process optimization curve was drawn to determine the optimum operating conditions that lead to a desirable response. The optimum conditions for BrO3 − adsorption using Fe-CNTs nanocomposite were found to be pH 2.0, initial BrO3 − concentration of 10.0 mg/L, and adsorbent dose of 0.010 g per 50 mL solution.

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Ranjan, D., Khan, M. A., Otero, M., Siddiqui, M. R., & Alshaeef, S. A. (2021). Optimization of bromate adsorption onto Fe-CNTs nanocomposite using response surface methodology. Water SA, 47(4), 423–429. https://doi.org/10.17159/WSA/2021.V47.I4.3873

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