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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) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 10 (Mai 2011) . - pp. 6325-6330 Titre : Utilization of bipolar membrane electrodialysis for the removal of boron from aqueous solution Type de document : texte imprimé Auteurs : Hiroki Nagasawa, Auteur ; Atsushi Iizuka, Auteur ; Akihiro Yamasaki, Auteur Année de publication : 2011 Article en page(s) : pp. 6325-6330 Note générale : Chimie industrielle Langues : Anglais (eng) 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 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24158927 [article] 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 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24158927