Utilization of bipolar membrane electrodialysis for the removal of boron from aqueous solution / Hiroki Nagasawa in Industrial & engineering chemistry research, Vol. 50 N° 10 (Mai 2011)  

Utilization of bipolar membrane electrodialysis for the removal of boron from aqueous solution [texte imprimé] / Hiroki Nagasawa, Auteur ; Atsushi Iizuka, Auteur ; Akihiro Yamasaki, Auteur . - 2011 . - pp. 6325-6330.
Chimie industrielle
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 50 N° 10 (Mai 2011) . - pp. 6325-6330

Mots-clés :	Membrane separation Aqueous solution Electrodialysis Bipolar membrane
Résumé :	Bipolar membrane electrodialysis (BMED) was used to remove boron from aqueous solution. BMED was compared with conventional electrodialysis (ED) using aqueous solutions of sodium tetraborate containing 100 mg/L of boron. With use of BMED, more than 90% of the boron was removed under both acidic (pH 2.3) and basic (pH 9.1) conditions, whereas only 35-45% of the boron was removed using conventional ED. Over 90% of the boron was removed from the diluate solution over a wide range of initial pH from 2.3 to 12.0. A high initial pH reduces the current efficiency of boron removal because of the high mobility and high concentration of hydroxide ions compared with those of borate ions. The power requirement for boron removal increased as the initial pH and concentration of sodium chloride increased, but decreased as the applied voltage was increased. BMED is a promising option for removal of boron from aqueous solution.
DEWEY :	660
ISSN :	0888-5885
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