TY - JOUR
T1 - Efficient removal of Orange G using Prussian Blue nanoparticles supported over alumina
AU - Doumic, Lucila
AU - Salierno, Gabriel
AU - Cassanello, Miryan
AU - Haure, Patricia
AU - Ayude, Maria Alejandra
PY - 2015
Y1 - 2015
N2 - Prussian Blue nanoparticles (PBNP) synthetized and adsorbed onto γ-Al2O3 spheres were prepared and characterized by transition and scanning electron microscopy (TEM, SEM), energy dispersive X-ray spectroscopy (EDS) and sorptometry. Adsorption and reaction runs were performed using aqueous solutions of a model azo dye Orange G. The adsorption capacity of the PBNP/γ-Al2O3 at 323 and 343 K at initial pH 3 and 6 was studied. The presence of PBNP increased the adsorption capacity of the support and this effect was more pronounced at initial pH 6. However, since the adsorbent life time was narrow and its regeneration quite difficult, PBNP/γ-Al2O3 was tested as a heterogeneous Fenton-like catalyst. The catalytic activity and stability for oxidation of Orange G were investigated in terms of discolouration, TOC and oxidant conversion. At the best operating condition studied (343 K and pH0 = 3), complete dye discolouration and 60% of mineralization were attained while reaction largely overcomes adsorption. At this temperature the catalyst activity and its characteristics remained almost invariable during 9 cycles of 5 h each and iron leaching occurred in low extent. © 2014 Elsevier B.V. All rights reserved.
AB - Prussian Blue nanoparticles (PBNP) synthetized and adsorbed onto γ-Al2O3 spheres were prepared and characterized by transition and scanning electron microscopy (TEM, SEM), energy dispersive X-ray spectroscopy (EDS) and sorptometry. Adsorption and reaction runs were performed using aqueous solutions of a model azo dye Orange G. The adsorption capacity of the PBNP/γ-Al2O3 at 323 and 343 K at initial pH 3 and 6 was studied. The presence of PBNP increased the adsorption capacity of the support and this effect was more pronounced at initial pH 6. However, since the adsorbent life time was narrow and its regeneration quite difficult, PBNP/γ-Al2O3 was tested as a heterogeneous Fenton-like catalyst. The catalytic activity and stability for oxidation of Orange G were investigated in terms of discolouration, TOC and oxidant conversion. At the best operating condition studied (343 K and pH0 = 3), complete dye discolouration and 60% of mineralization were attained while reaction largely overcomes adsorption. At this temperature the catalyst activity and its characteristics remained almost invariable during 9 cycles of 5 h each and iron leaching occurred in low extent. © 2014 Elsevier B.V. All rights reserved.
U2 - 10.1016/j.cattod.2014.03.064
DO - 10.1016/j.cattod.2014.03.064
M3 - Article
SN - 0920-5861
JO - Catalysis Today
JF - Catalysis Today
ER -