Reduced graphene oxide based aerogels: Doped with ternary Prussian blue analogs and selective removal of Cs+ from effluent

Reduced graphene oxide aerogels doped with ternary Prussian blue analogs (RGOA/TPBAs) were developed by controlled self-assembly tactics and applied to remove radioactive cesium (Cs) from effluent. The unique three-dimensional layered structure gives RGOA/TPBAs excellent mechanical strength and high-level specific surface area, which facilitates the exposure of adsorption points and thus promotes the adsorption of Cs+. A maximum adsorption capacity of 226.98 mg g(-1) (dosage = 0.25 g L-1, pH = 7, T = 298.15 K) was obtained for the composite material, which exhibited excellent adsorption performance for cesium. In addition, RGOA/TPBAs maintained an excellent Cs+ selectivity in a solution containing other ions (m V-1 = 0.25 g L-1, Mn+ = Ca2+, Mg2+, Na+, K+, [Cs+]initial = 10 mg L-1) and the removal rate is more than 90%. The proposed secondary kinetic model (R-2 = 0.9982) and fitted the adsorption process well, as does the Langmuir isotherm model (R-2 = 0.9929), making it clear that the adsorption is homogeneous monolayer chemisorption. The coexisting ion adsorption experiments illustrate that the good selectivity of the composite.

Automated summary

Reduced graphene oxide aerogels doped with ternary Prussian blue analogs were developed and used for the removal of radioactive cesium from effluent. The composite material exhibited excellent adsorption performance and selectivity for cesium.