| Abstract |
| In this study, chromium(VI) adsorption characteristics were analyzed by using commercial filter media including ferox, birm, garnet, and hydro-filt. Adsorption experiments were performed under batch condition. Ferox was found to be the highest adsorption capacity for chromium(VI). Kinetic adsorption experiment result for chromium(VI) adsorption onto ferox showed that equilibrium reached whin 3 hours and the results were well described by pseudo second-order model. Equilibrium experiments were better fitted to Langmuir model than Freundlich model and the maximum adsorption capacity of ferox was 9.26 mg/g. chromium(VI) adsorption increased with increasing temperature, indicating that the reaction was endothermic. The adsorption amount of chromium(VI) was the highest at pH 3 (6.33 mg/g) and decreased with increasing pH. As the increase of ferox dose, the removal percentage of chromium(VI) increased but the adsorption amount per unit mass of adsorbent was decreased. The presence of As a result of the experiments with competitive ions for SO42-, PO43- and NO3- has minor differences and has a negative effect on the chromium(VI) adsorption of ferox. Therefore, it is considered that ferox is not only used as a commercial filter but also effective and economical adsorbent for removing chromium(VI). |
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| Key Words |
| Adsorption, pH, Anion Competition, Birm, Chromium, Ferox, Garnet, Hydro-filt |
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