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Surfactant-modified clinoptilolite-rich tuff to remove barium (Ba2+) and fulvic acid from mono- and bi-component aqueous media by M.D. Baeza-Alvarado; M.T. Olguín is a Materials Science article available to read on EtoBox.

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The kinetics of the removal of Ba 2+ and fulvic acid by a surfactant-modified Mexican clinoptilolite-rich tuff was investigated. The effect of fulvic acid in a bi-component aqueous medium (Ba 2+ -fulvic acid) on the sorption of Ba 2+ was also considered, and an unmodified zeolitic material was included for comparison. The Ba 2+ , fulvic acid and fulvic acid-Ba 2+ solutions were placed in contact with a Mexican clinoptilolite-rich tuff in a batch system. Atomic absorption and UV-Vis spectroscopy were used to measure the remaining aqueous barium and fulvic acid, respectively. The Ba 2+ and fulvic acid sorption kinetic experimental data were best fitted by a pseudo-second-order model. The amount of surfactant covering the surface of the zeolitic material and the fulvic acid influenced the sorption kinetics of Ba 2+ from aqueous media by sodium and surfactant-modified Mexican clinoptilolite-rich tuffs. The presence of Ba 2+ in the aqueous medium increased the sorption of fulvic acid by the sodium-modified zeolite from Oaxaca (NaZO), but the time to reach equilibrium was greater. The Ba 2+ was removed from aqueous media by ion exchange or complexation with fulvic acid, and fulvic acid w

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Author

M.D. Baeza-Alvarado; M.T. Olguín

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1387-1811)

Published

2011

Language

EN

Field

Materials Science (Physical Sciences)