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Removal of Ni(II) and Cr(VI) with titanium(IV) oxide nanoparticle agglomerates in fixed-bed columns / Sushanta Debnath in Industrial & engineering chemistry research, Vol. 49 N° 5 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2031–2039 Titre : Removal of Ni(II) and Cr(VI) with titanium(IV) oxide nanoparticle agglomerates in fixed-bed columns Type de document : texte imprimé Auteurs : Sushanta Debnath, Auteur ; Krishna Biswas, Auteur ; Uday Chand Ghosh, Auteur Année de publication : 2010 Article en page(s) : pp. 2031–2039 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Ni(II);  Cr(VI);  Titanium(IV);  Oxide  Nanoparticle Résumé : Removal performances of Ni(II) and Cr(VI) from water were investigated using a packed fixed bed of agglomerated nanoparticles of hydrous titanium(IV) oxide (NHTO). The parameters varied were the (i) bed depth, (ii) flow rate, and (iii) feed solution concentrations. Comparison of breakthrough volumes indicated that the removal performance of Ni(II) (at pH 5.0 ± 0.1) was better than that of Cr(VI) (at pH 2.0 ± 0.1) by the NHTO fixed-bed columns. The breakthrough data were described better by the Thomas (R2 = 0.983−0.999) and bed-depth service time (BDST) (R2 = 0.992−0.998) models than by the Adams−Bohart model (R2 = 0.844−0.982). The Thomas model column capacity (q0) for Ni(II) was greater than that for Cr(VI) at any conditions. The breakthrough time (tb) of the BDST model increased with increasing bed depth of the NHTO columns, and the increase in tb was greater than the increase in bed depth. NHTO fixed-bed columns were able to treat Ni(II)- and Cr(VI)-contaminated industrial wastewater successfully. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9014827 [article] Removal of Ni(II) and Cr(VI) with titanium(IV) oxide nanoparticle agglomerates in fixed-bed columns [texte imprimé] / Sushanta Debnath, Auteur ; Krishna Biswas, Auteur ; Uday Chand Ghosh, Auteur . - 2010 . - pp. 2031–2039. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2031–2039 Mots-clés : Ni(II);  Cr(VI);  Titanium(IV);  Oxide  Nanoparticle Résumé : Removal performances of Ni(II) and Cr(VI) from water were investigated using a packed fixed bed of agglomerated nanoparticles of hydrous titanium(IV) oxide (NHTO). The parameters varied were the (i) bed depth, (ii) flow rate, and (iii) feed solution concentrations. Comparison of breakthrough volumes indicated that the removal performance of Ni(II) (at pH 5.0 ± 0.1) was better than that of Cr(VI) (at pH 2.0 ± 0.1) by the NHTO fixed-bed columns. The breakthrough data were described better by the Thomas (R2 = 0.983−0.999) and bed-depth service time (BDST) (R2 = 0.992−0.998) models than by the Adams−Bohart model (R2 = 0.844−0.982). The Thomas model column capacity (q0) for Ni(II) was greater than that for Cr(VI) at any conditions. The breakthrough time (tb) of the BDST model increased with increasing bed depth of the NHTO columns, and the increase in tb was greater than the increase in bed depth. NHTO fixed-bed columns were able to treat Ni(II)- and Cr(VI)-contaminated industrial wastewater successfully. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9014827