Adsorption of cationic dye on a biohybrid SiO<sub>2</sub>-alginate

Barrón‐Zambrano, Jesús Alberto; López-Pérez, A J; Ortega, Alejandra; Rodríguez, David Muñoz; Figueiras, Cristian Carrera

doi:10.1088/1757-899x/45/1/012018

Cited by 1 publication

(2 citation statements)

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“…8). The values of Langmuir constants ( Table 2) are comparable to those obtained in previous MB adsorption experiments on alginate/polyaspartate hydrogels [25], or on biohybrid SiO 2 -alginate [26].…”

Section: Resultssupporting

confidence: 84%

“…Thus, previous studies have demonstrated that nitrophenolic pollutants can be retained from wastewaters by alginate complexes [23,24], and others have shown that dyes like methylene blue can be retained from aqueous solutions by alginate/polyaspartate hydrogels or by biohybrid SiO 2 -alginate, but the adsorbed amounts were not very significant [25,26].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, characterization and adsorption properties of alginate porous beads

et al. 2015

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Original calcium alginate beads with porous structure and high adsorption surface are proposed. The beads were synthesized using sodium alginate in the presence of sodium dodecyl sulfate as foaming agent, NaCl as porogen agent and CaCl 2 as cross-linker. They were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and Brunauer-Emmett-Teller method. The adsorption capacity of beads was tested with methylene blue (MB). The data show that the adsorption efficiency increases with the amount of beads, decreases with pollutant concentration, and is maximal at pH = 9. The adsorption is fast in the first 3 hours, and slows down thereafter. The kinetic results show that the adsorption of MB on alginate porous beads obeys the Langmuir model. A scheme of MB adsorption taking into account the ionic interactions with calcium alginate beads has been proposed.

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Section: Resultssupporting

confidence: 84%