Prussian blue composites for Cs adsorption – modification of the method and modelling of the adsorption processes

Magnetic Prussian blue graphene oxide (MPBGO) and Prussian blue graphene oxide nanocomposites prepared by a new synthetic approach were characterised by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectrometry, Mössbauer spectroscopy, and transmission electron microscopy. The adsorption data on the dependence of Cs(I) adsorption capacity on concentrations (obtained in batch experiments) fitted-well the Langmuir model with a maximum adsorption capacity of 943 mg·g –1 for the MPBGO composite. Adsorption kinetics studies showed better agreement of the experimental data of Cs(I) with the pseudo-second-order kinetics model. The MPBGO composite was used for the pre-concentration of 137 Cs from seawater samples. The ANFIS model was used to predict the adsorption capacity of the synthesised composites.