Abstract

Bromate which was formed bromide dissolved in water during the ozonation process, is carcinogenic and mutagenic to humans. To avoid bromate damage, many countries strictly control its concentration in drinking water. Activated carbon is an effective adsorbent material widely used in water treatment. In order to enhance the adsorption of bromate ion on activated carbon, the modified activated carbon was obtained from granular activated carbon by chemical activation using cationic surfactant as an activator. The adsorption characteristics of bromate ion on the modified activated carbon were investigated through adsorption experiments. The effects of temperature, pH in solution, contact time and initial bromate concentration on bromate adsorption by the modified activated carbon were investigated. The experimental data were analyzed by the Langmuir and Freundlich models of adsorption. Kinetic adsorption data were analyzed by the pseudo-first-order kinetic model and the pseudo-second-order model, respectively.

Keywords:

Activated carbon, adsorption, bromate, equilibrium, kinetic,

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The authors have no competing interests.

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