Mesoporous Nb2O5/SiO2 material obtained by sol-gel method and applied as adsorbent of crystal violet dye

In this work, SiO2/Nb2O5 (SiNb) material was prepared using sol-gel method and employed as adsorbent for removal of crystal violet dye (CV). The material was characterized using nitrogen adsorption-desorption isotherms, FTIR spectroscopy, pHpzc, and SEM-EDS. The analysis of N2 isotherms revealed the...

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Veröffentlicht in:	Environmental technology. - 1998. - 38(2017), 5 vom: 07. März, Seite 566-578
1. Verfasser:	Umpierres, Cibele S (VerfasserIn)
Weitere Verfasser:	Prola, Lizie D T, Adebayo, Matthew A, Lima, Eder C, Dos Reis, Glaydson S, Kunzler, Diego D F, Dotto, G L, Arenas, Leliz T, Benvenutti, Edilson V
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2017
Zugriff auf das übergeordnete Werk:	Environmental technology
Schlagworte:	Journal Article Mesoporous SiO2/Nb2O5 adsorption process crystal violet dye simulated effluents sol–gel method Coloring Agents Gels Oxides Water Pollutants, Chemical mehr... Niobium 05175J654G Silicon Dioxide 7631-86-9 Gentian Violet J4Z741D6O5 niobium pentoxide K9343U17IN

Beschreibung
Zusammenfassung:	In this work, SiO2/Nb2O5 (SiNb) material was prepared using sol-gel method and employed as adsorbent for removal of crystal violet dye (CV). The material was characterized using nitrogen adsorption-desorption isotherms, FTIR spectroscopy, pHpzc, and SEM-EDS. The analysis of N2 isotherms revealed the presence of micro- and mesopores in the SiNb sample with specific surface area as high as 747 m2 g-1. For the CV adsorption process, variations of several parameters such as of pH, temperature, contact time, and concentration of dye of the process were evaluated. The optimum initial pH of the CV dye solution was 7.0. The adsorption kinetic and equilibrium data for CV adsorption were suitably represented by the general-order and Liu models, respectively. The maximum adsorption capacity of the CV dye by SiNb was achieved at 303 K, which attained 116 mg g-1 at this temperaure. Dye effluents were simulated and used to check the applicability of the SiNb material for treatment of effluents - the material showed very good efficiency for decolorization of dye effluents
Beschreibung:	Date Completed 14.02.2017 Date Revised 16.11.2017 published: Print-Electronic Citation Status MEDLINE
ISSN:	1479-487X
DOI:	10.1080/09593330.2016.1202329