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Fluoride removal by donnan dialysis with anion exchange membranes
Scopus
Toplam 120 atıf DOI
The removal of fluoride from diluted solution with Neosepta AHA anion exchange membrane has been studied by Donnan dialysis. The effects of concentration, pH, and accompanying anion on feed phase and receiving phase composition were investigated. Neosepta AHA anion exchange membrane was used for the removal of fluoride and the flux of fluoride with respect to the concentration, pH, and the effect of the counter-ions (HCO3-, Cl-, SO4 -2) were obtained between 34-136.10-7 (m.mol.cm-2.s-1). The effect of the fluoride flux increased with increasing of concentration on the feed phase. The flux of fluoride was found to be higher at higher pH in the feed phase. In addition, the accompanying counter-anions also influenced the flux of fluoride and the order of flux was founded as HCO3- >Cl->SO4-2. The results obtained for AHA membrane were compared with Neosepta AFN and polysulfone SB-6407 membranes. The transport efficiencies of the membranes were found to be in the order AFN>AHA>SB-6407. © 2005 Elsevier B.V. All rights reserved.
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Boron removal by electrodialysis with anion-exchange membranes
Scopus
Havuzumuzda 85 atıf almış
The removal of boron from an aqueous solution was studied in a two-chamber cell separated with a commercial anion-exchange membrane as a function of current density, pH, type of the membrane, concentration and different type of salt solutions. At the end of these studies, the maximum value of boron removal was obtained under the conditions where the maximum current was applied; 0.1 M H3BO3 (pH = 9) and 0.001 M NaCl solutions were used as a catholyte and an anolyte solution, respectively. The AHA membrane was used for separating the two cells used in the electrodialysis experiments. All experiments were carried out at room temperature, and the concentration of boron at the anode cell was determined by ICP-AES. It was concluded that electrodialysis is an appropriate method for boron removal from aqueous solutions under suitable conditions. © 2006 Elsevier B.V. All rights reserved.
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Kurumlar (1)
Selçuk Üniversitesi
Selçuklu, Turkey