Removal of remazol yellow from aqueous solution using Fe–Cu and Fe–Ni nanoscale oxides and their carbonaceous composites

• Published in: Environmental technology 2012-03, Vol.33 (5), p.545-554
• Main Authors: Trujillo-Reyes, Jésica, Sánchez-Mendieta, Víctor, José Solache-Ríos, Marcos, Colín-Cruz, Arturo
• Format: Article
• Language: English
• Subjects: Adsorption; Applied sciences; aqueous solution; aqueous solutions; Azo Compounds - chemistry; Azo Compounds - isolation & purification; Carbon - chemistry; Chemical engineering; Dyes; environmental technology; Exact sciences and technology; fabrics; hydrogen peroxide; Iron; Metals - chemistry; Nanocomposites; Nanomaterials; nanoscale bimetallic oxides; Nanostructure; Nanostructures - chemistry; Nanostructures - ultrastructure; Other industrial wastes. Sewage sludge; Oxides; Oxides - chemistry; Pollution; pyrolysis; remazol yellow; sewage sludge; Solutions; Sorption; sorption isotherms; Surface chemistry; Wastes; Water - chemistry; Water Pollutants, Chemical - chemistry; Water Pollutants, Chemical - isolation & purification; Water Purification - methods
• ISSN: 1479-487X; 0959-3330; 1479-487X
• DOI: 10.1080/09593330.2011.584571

Fe–Cu and Fe–Ni nanoscale oxides and their carbonaceous composites (C/Fe–Cu and C/Fe–Ni, 75/25 wt.%; C/Fe–Cu and C/Fe–Ni 95/5 wt.%), made from pyrolysis of sewage sludge, have been evaluated to remove remazol yellow textile dye from aqueous solution. The kinetic and sorption isotherms experimental results were best fitted to the pseudo-second-order kinetic and Langmuir–Freundlich isotherm models, which indicates that the sorption mechanism may be chemisorption onto heterogeneous surfaces. Fe–Ni and Fe–Cu nanoscale oxides adsorption capacities were 157.8 mg/g and 117.6 mg/g, resulting in nearly 83% and 70% of dye removal, respectively, using 100 mg/L of initial dyestuff concentration and 10 mg of each material. The adsorption capacities of Fe–Cu, Fe–Ni oxides and C/Fe–Cu 75/25%, C/Fe–Ni 75/25% composites provide better results at pH between 3 and 5. In addition, three sorption–desorption cycles using 30% H₂O₂ solution and distilled water were performed: sorption efficiencies for all materials decreased after each cycle; nevertheless, Fe–Cu and Fe–Ni nanoscale oxides were the best materials for the removal of remazol yellow dye.