Novel tuffite/Fe-Cu oxides nanocomposite with functionality for dye removal in aqueous solution
Por:
Blanco-Flores, Alien, Sanchez-Mendieta, Victor, Gutierrez-Segura, Edith, Vilchis-Nestor, Alfredo R., Morales-Luckie, Raul A.
Publicada:
1 dic 2016
Resumen:
Fe-Cu oxides nanoparticles were embedded on tuffite (TUF) mineral by
means of a simple immersion-ion impregnation, followed by a reduction
reaction, methodology. TUF/Fe-Cu nanocomposite characteristics were
investigated by XRD, TEM, BET, SEM, FT-IR spectroscopy and pH(zpc)
method. Fe-Cu nanostructures with mean sizes between 10 and 20 nm were
effectively supported on TUF. Because of its functional properties, the
nanocomposite was studied as adsorbent material for the degradation of
malachite green (MG) organic dye in aqueous solution. The adsorption
kinetic data was well-fitted to pseudo first-order model, indicating
physisorption as the main mechanism of adsorption. High pH and
temperature of the solution favored malachite green adsorption. The
adsorption process was spontaneous and endothermic. In comparative
sorption experiments with different dyes, the nanocomposite showed
better removal capacities for cationic and basic than for anionic and
acid dyes. Langmuir, Freundlich, Langmuir-Freundlich and Temkin models
were applied to evaluate the isotherms, resulting in an adsorption
capacity of 376.66 mg/g, which is above most of the adsorbent materials
so far employed for malachite green degradation in aqueous solution.
Therefore, this novel, easy to prepare and low-cost nanocomposite proved
to have synergic functionality as an efficient adsorbent material for
cationic organic dyes. (C) 2016 Elsevier Ltd. All rights reserved.
Filiaciones:
Tecnol Estudios Super Tianguistenco, Div Mecan, Carretera Tenango Marquesa Km 22, Santiago Tianguistenco 52650, Estado De Mexic, Mexico
Univ Autonoma Estado Mexico, Fac Quim, Paseo Colon & Tollocan S-N, Toluca 50000, Estado De Mexic, Mexico
Ctr Conjunto Invest Quim Sustentable UAEM UNAM, Carretera Toluca,Atlacomulco Km 14-5, Toluca 50200, Estado Mexico, Mexico
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