J. Phys. IV France 107 (2003) 1325
Fixed-bed modeling of arsenic (III) adsorption from water by Sulfate Modified Iron Oxide Coated Sand (SMIOCS)R.C. Vaishya1, S.K. Gupta2 and I.C. Agarwal1
1 Department of Civil Engineering, Motilal Nehru National Institute of Technology, Allahabad 211004, India
2 Centre for Environmental Science and Engineering, Indian Institute of Technology, Bombay 400076, India
A medium known as sulfate modified iron oxide coated sand (SMIOCS) was evaluated for the removal of As (III) from synthetic water with ionic strength of 0.01 M NaNO 3 employing fixed bed mode. The medium was characterised for BET surface area; alkali and acid resistance; and presence of iron, barium and sulfur on sand surface. The particle size of media shown significant impact on bed volume treated with similar expcrimental protocol. A theoretical model, Wolborska model, has shown good correlation with observed experimental data generated during depth variation studies at flow rate of 1.56 m 3/m 2/hr with influent As (III) concentration of 1.0 mg/L. Regeneration studies using 0.2 M NaOH as regenerant resulted in nearly 83% recove of As (III) during up flow mode.
© EDP Sciences 2003