Bromate ion-exchange properties of crystalline akaganéite / Ramesh Chitrakar in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2107–2112 Titre : Bromate ion-exchange properties of crystalline akaganéite Type de document : texte imprimé Auteurs : Ramesh Chitrakar, Auteur ; Satoko Tezuka, Auteur ; Akinari Sonoda, Auteur Année de publication : 2009 Article en page(s) : p. 2107–2112 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Crystalline akaganéite Ion-exchange properties BrO3− Résumé : We synthesized crystalline akaganéite (β-FeOOH; Cl− type) by hydrolysis of FeCl3 solution at 100 °C and examined the ion-exchange properties with BrO3−. The uptake rate of BrO3− was so fast that equilibrium was attained in 60 min. The uptake was significantly dependent on pH, showing a maximum uptake at pH ≈ 4. From distribution coefficients (Kd) determined with a mixed solution (BrO3−, Cl−, CO32−, and SO42−; each concentration = 0.1 mmol/dm3), crystalline akaganéite showed the highest selectivity toward BrO3−. The BrO3− uptake was fitted well with the Langmuir model. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8011038 [article] Bromate ion-exchange properties of crystalline akaganéite [texte imprimé] / Ramesh Chitrakar, Auteur ; Satoko Tezuka, Auteur ; Akinari Sonoda, Auteur . - 2009 . - p. 2107–2112. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2107–2112 Mots-clés : Crystalline akaganéite Ion-exchange properties BrO3− Résumé : We synthesized crystalline akaganéite (β-FeOOH; Cl− type) by hydrolysis of FeCl3 solution at 100 °C and examined the ion-exchange properties with BrO3−. The uptake rate of BrO3− was so fast that equilibrium was attained in 60 min. The uptake was significantly dependent on pH, showing a maximum uptake at pH ≈ 4. From distribution coefficients (Kd) determined with a mixed solution (BrO3−, Cl−, CO32−, and SO42−; each concentration = 0.1 mmol/dm3), crystalline akaganéite showed the highest selectivity toward BrO3−. The BrO3− uptake was fitted well with the Langmuir model. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8011038

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A new method for synthesis of Mg−Al, Mg−Fe, and Zn−Al layered double hydroxides and their uptake properties of bromide ion / Ramesh Chitrakar in Industrial & engineering chemistry research, Vol. 47 n°14 (Juillet 2008)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4905–4908 Titre : A new method for synthesis of Mg−Al, Mg−Fe, and Zn−Al layered double hydroxides and their uptake properties of bromide ion Type de document : texte imprimé Auteurs : Ramesh Chitrakar, Auteur ; Satoko Tezuka, Auteur ; Akinari Sonoda, Auteur ; Kohji Sakane, Auteur Année de publication : 2008 Article en page(s) : p. 4905–4908 Langues : Anglais (eng) Mots-clés : Layered double hydroxides  Bromide ion Résumé : We report a very simple and efficient method to prepare LDHs of Mg−Al, Mg−Fe, and Zn−Al by simply mixing solid divalent metal oxide with trivalent metal chloride solution at 30 °C. Calcined Mg−Al and Mg−Fe are effective in removing low concentration of Br− from a mixed solution (Br− = 0.1 mmol/dm3, Cl− = 1.0 mmol/dm3) at a material dose of 1 g/dm3. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0716417 [article] A new method for synthesis of Mg−Al, Mg−Fe, and Zn−Al layered double hydroxides and their uptake properties of bromide ion [texte imprimé] / Ramesh Chitrakar, Auteur ; Satoko Tezuka, Auteur ; Akinari Sonoda, Auteur ; Kohji Sakane, Auteur . - 2008 . - p. 4905–4908. Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4905–4908 Mots-clés : Layered double hydroxides  Bromide ion Résumé : We report a very simple and efficient method to prepare LDHs of Mg−Al, Mg−Fe, and Zn−Al by simply mixing solid divalent metal oxide with trivalent metal chloride solution at 30 °C. Calcined Mg−Al and Mg−Fe are effective in removing low concentration of Br− from a mixed solution (Br− = 0.1 mmol/dm3, Cl− = 1.0 mmol/dm3) at a material dose of 1 g/dm3. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0716417

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