Open AccessOptimization of bromate adsorption onto Fe-CNTs nanocomposite using response surface methodology
Author(s) -
D. Ranjan,
Moonis Ali Khan,
Marta Otero,
Masoom Raza Siddiqui,
Shareefa Ahmed Alshaeef
Publication year - 2021
Publication title -
water s.a./water sa
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.389
H-Index - 59
eISSN - 1816-7950
pISSN - 0378-4738
DOI - 10.17159/wsa/2021.v47.i4.3873
Subject(s) - response surface methodology , adsorption , nanocomposite , bromate , carbon nanotube , materials science , process optimization , chemical engineering , chemistry , chromatography , composite material , inorganic chemistry , organic chemistry , bromide , engineering
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.