Fe–Ni Nanostructures and C/Fe–Ni Composites as Adsorbents for the Removal of a Textile Dye from Aqueous Solution

Novel adsorption materials—Fe–Ni nanostructures and C/Fe–Ni composites—with the carbonaceous material coming from sewage sludge, have been developed and evaluated to remove indigo carmine from aqueous solution. The adsorbents were characterized by transmission and scanning electron microscopy, X-ray...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2012-03, Vol.223 (3), p.1331-1341
Main Authors: Trujillo-Reyes, Jésica, Solache-Ríos, Marcos, Vilchis-Nestor, Alfredo R., Sánchez-Mendieta, Víctor, Colín-Cruz, Arturo
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Climate Change/Climate Change Impacts
Composite materials industry
Diffraction
Distilled water
Dyes
Earth and Environmental Science
Environment
Environmental monitoring
Experiments
Hydrogen peroxide
Hydrogeology
Indigo
Industrial wastes
Infrared spectroscopy
Isotherms
Membrane separation
Nanoparticles
Nanotechnology
Porous materials
Scanning electron microscopy
Sewage sludge
Sludge
Soil Science & Conservation
Sorption
Spectrum analysis
Studies
Textile industry
Water Quality/Water Pollution
X-rays
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Summary:Novel adsorption materials—Fe–Ni nanostructures and C/Fe–Ni composites—with the carbonaceous material coming from sewage sludge, have been developed and evaluated to remove indigo carmine from aqueous solution. The adsorbents were characterized by transmission and scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and Brunauer–Emmett–Teller analysis. Sorption kinetics and isotherms were determined and the adsorption behaviours analysed. All adsorbents here studied have exhibited good efficiency to remove indigo carmine from aqueous solution. Pseudo-second-order kinetic and Langmuir–Freundlich isotherm models were successfully applied to the experimental data. Fe–Ni nanostructures adsorption capacity was 977.18 mg/g, followed by C/Fe–Ni 75/25% composite with 654.33 mg/g, and a lowest value, 486.41 mg/g, was obtained for C/Fe–Ni 95/5% composite. It can be suggested that the sorption mechanism of the dye is chemisorption on these heterogeneous novel, cheap and efficient functional materials. All materials provide the highest adsorption capacities in pH between 4 and 10. In addition, three sorption–desorption cycles using 30% H 2 O 2 solution and distilled water were performed; sorption efficiencies of both composites (C/FeNi 75/25% and C/FeNi 95/5%) decreases in each cycle, but this behaviour is not observed for FeNi nanoscale oxides.
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-011-0948-9