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A platform for research: civil engineering, architecture and urbanism
Preparation and characterization of an organo-palygorskite-Fe3O4 nanomaterial for removal of anionic dyes from wastewater
AbstractThe organophilization of clays to increase interfacial interactions is a typical practice when the objective is its encapsulation with a polymer. This work intend to synthesize and characterize an organo-palygorskite-Fe3O4, to change the hydrophilicity of the material and investigate its efficiency in the removal of two anionic dyes from aqueous solution with the aim to use this material to treat wastewater contaminated with dyes. The organophilization of modified palygorskite–Fe3O4 was done with a cationic surfactant (cetyl trimethylammonium bromide, CTAB) and the material obtained was characterized by XRF, SEM, XRD, FTIR, Nano Zetasizer, density, BET surface area, TGA/DTA and contact angle measurements. XRF and FTIR confirmed the presence of carbon in the modified palygorskite–Fe3O4 nanoparticles while XRD showed new crystalline phases from CTAB. Furthermore, a positive zeta potential value appeared and an inversion in the nanoparticles' hydrophobicity happened due to the increase of organic carbon content in the organo-palygorskite-Fe3O4. The adsorbed anionic dye on organo-palygorskite-Fe3O4 may be completely recovered by the action of a magnet, showing an excellent adsorptive property and economical alternative adsorbents to treat dye wastewater. The negative values calculated for the free energies of adsorption indicate that the adsorption of methyl orange and indigo carmine on the active sites of organo-palygorskite-Fe3O4 surface was spontaneous and that the indigo carmine had the best interaction with the magnetic organo clay.
HighlightsAn organo palygorskite–Fe3O4 nanoparticles was prepared in this work.By using different techniques was observed that palygorskite was organophilized.Contact angle shows nanoparticle's change from partially hydrophobic to hydrophilic.Anionic dyes on organoclay may be completely recovered by the action of a magnet.
Preparation and characterization of an organo-palygorskite-Fe3O4 nanomaterial for removal of anionic dyes from wastewater
AbstractThe organophilization of clays to increase interfacial interactions is a typical practice when the objective is its encapsulation with a polymer. This work intend to synthesize and characterize an organo-palygorskite-Fe3O4, to change the hydrophilicity of the material and investigate its efficiency in the removal of two anionic dyes from aqueous solution with the aim to use this material to treat wastewater contaminated with dyes. The organophilization of modified palygorskite–Fe3O4 was done with a cationic surfactant (cetyl trimethylammonium bromide, CTAB) and the material obtained was characterized by XRF, SEM, XRD, FTIR, Nano Zetasizer, density, BET surface area, TGA/DTA and contact angle measurements. XRF and FTIR confirmed the presence of carbon in the modified palygorskite–Fe3O4 nanoparticles while XRD showed new crystalline phases from CTAB. Furthermore, a positive zeta potential value appeared and an inversion in the nanoparticles' hydrophobicity happened due to the increase of organic carbon content in the organo-palygorskite-Fe3O4. The adsorbed anionic dye on organo-palygorskite-Fe3O4 may be completely recovered by the action of a magnet, showing an excellent adsorptive property and economical alternative adsorbents to treat dye wastewater. The negative values calculated for the free energies of adsorption indicate that the adsorption of methyl orange and indigo carmine on the active sites of organo-palygorskite-Fe3O4 surface was spontaneous and that the indigo carmine had the best interaction with the magnetic organo clay.
HighlightsAn organo palygorskite–Fe3O4 nanoparticles was prepared in this work.By using different techniques was observed that palygorskite was organophilized.Contact angle shows nanoparticle's change from partially hydrophobic to hydrophilic.Anionic dyes on organoclay may be completely recovered by the action of a magnet.
Preparation and characterization of an organo-palygorskite-Fe3O4 nanomaterial for removal of anionic dyes from wastewater
Middea, Antonieta (author) / Spinelli, Luciana S. (author) / Souza Jr, Fernando Gomes (author) / Neumann, Reiner (author) / Fernandes, Thais L.A.P. (author) / Gomes, Otavio da F.M. (author)
Applied Clay Science ; 139 ; 45-53
2017-01-13
9 pages
Article (Journal)
Electronic Resource
English
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