Kinetics and thermodynamics of Rhodamine B adsorption by La0.7Ca0.3MnO3

calcium doped lanthanum manganite (LCMO) nanostructure was synthesized via the mild hydrothermal method. Properties of synthesized material were characterized by X-ray diffraction, Fourier Transform Infrared Spectroscopy, Field Emission Scanning Electron Microscopy. The results of XRD and FTIR analyses show that the as-prepared material is composed of single-phase structure without impurity and nanorod morphology with a mean length of 126.8 nm.The present study aims at exploring the potential of the LCMO, for the removal of cationic Rhodamine B (RhB) dye from aqueous solution [1, 2]. Impact of pH, adsorbent dosage, dye concentration and contact time have been assessed during adsorption. About 80% removal has been attained with 0.5 g/L of adsorbent over the studied system. Thermodynamic and kinetic studies, followed by second order kinetic model, directed towards the endothermic nature of adsorption. The results obtained from batch experiments were modelled using Langmuir and Freundlich isotherm and were analysed on the basis of R2. Langmuir isotherm was found to be best fitted to the experimental data with high values of R2. Adsorption study revealed the affinity of LCMO for the dye ions present in waste water, introducing a novel adsorbent in field of waste water treatment..