Abstract
Bromate is an emerging hazardous substance in drinking water. In this study, the removal of bromate by Fe-pillared bentonite was investigated using various experimental parameters: contact time, initial concentration (C 0), temperature, initial pH and competing anions. The adsorption of bromate followed the pseudo-second-order kinetic better than it followed other kinetic models, and the pseudo-second-order kinetic study showed that equilibrium could be achieved within 60 min. Equilibrium isotherms were analyzed by Freundlich, Langmuir, Redlich–Peterson and Toth isotherm models. The Toth and Redlich–Peterson models better represented the bromate adsorption. Results also indicated that, other than the competing anions and solution pH, temperature was a key parameter affecting adsorption. It was ultimately concluded that Fe-pillared bentonite was effective at removing bromate from water.
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