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KMID : 1024520100190010089
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Journal of the Environmental Sciences
2010 Volume.19 No. 1 p.89 ~ p.96
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Turbidity Treatment of TiO2 Wastewater by Electrocoagulation/flotation Process
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Park Young-Seek
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Abstract
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The separation of TiO2 wastewater carried out by an electrocoagulation/flotation process, which had various operating parameters. The effect of electrode material (aluminum and four dimensionally stable electrode), applied current (0.07～0.5 A), electrolyte concentration (0～1 g/L), solution pH (3～11), initial turbidity (1000～20000 NTU) and suspended solid concentration (5000～25000 mg/L) were evaluated. Turbidity removal efficiency of the soluble anode (aluminum), which could produce metal ions, was higher than that of the dimensionally stable electrode. Considering operation time, turbidity removal and electric power, optimum current was 0.19 A. The more NaCl dosage was high, the less electric power was required. However, optimum NaCl concentration was 0.125 g/L considered removal efficiency, operation time and cost. Initial TiO2 concentration did not affected turbidity removal on the electrocoagulation/ flotation operation. The electrocoagulation/flotation process was proved to be a very effective separation method in the removal of TiO2 from wastewater.
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KEYWORD
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Electrocoagulation/flotation, Aluminum electrode, TiO2, Turbidity, Current
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