Abstract
Nano spinels of CuxMn1−xFe2O4 (x=0.0, 0.2, 0.4, 0.5, 0.8 and 1) have been synthesized. Nano-particles of CuxMn1−xFe2O4 were characterized by FTIR, XRD and SEM. The adsorption of brilliant green (BG) by nano particles of CuxMn1−xFe2O4 was studied. Results showed that adsorption activity of nano particles are as followed: MnFe2O4<CuFe2O4<Mn0.2Cu0.8Fe2O4<Mn0.8Cu0.2Fe2O4<Mn0.4Cu0.6Fe2O4<Mn0.5Cu0.5Fe2O4. The adsorption of BG followed pseudo-second-order kinetic model. Thermodynamic results revealed that the adsorption of BG onto Mn0.5Cu0.5Fe2O4 particles is endothermic and spontaneously process. The adsorption equilibrium was best described by the Langmuir model. The nano particles of Mn0.5Cu0.5Fe2O4 can be conveniently regenerated by chemical and physical methods after adsorption.
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