Entropy, enthalpy, and gibbs free energy variations of Cs-133 via CO2-activated carbon filter and ferric ferrocyanide hybrid composites

Abstract

The addition of ferric ferrocyanide (Prussian blue; PB) to adsorbents could enhance the adsorption performance of Cs-133. Toward this goal, we present a heterogeneously integrated carbonaceous material platform consisting of PB in direct contact with CO2-activated carbon filters (PB-CACF). The resulted sample retains 24.39% more PB than vice versa probed by the ultraviolet-visible spectrometer. We leverage this effect to capture Cs-133 in the aqueous environment via the increase in ionic strength and micropores. We note that the amount of PB was likely to be the key factor for Cs-133 adsorption compared with specific surface characteristics. The revealed adsorption capacity of PB-CACF was 21.69% higher than the bare support. The adsorption characteristics were feasible and spontaneous. Positive values of Delta H degrees and Delta S degrees show the endothermic nature and increased randomness. Based on the concept of capturing hazardous materials via hazardous materials, our work will be of interest within the relevant academia for collecting radionuclides in a sufficient manner.