High efficiency removal of Cs+ by Fe-Co framework PBAs from radioactive wastewater

The widespread application of nuclear energy has increased the risk of contamination by radionuclide 137 Cs. Prussian blue analogues are considered to be excellent materials for the removal of 137 Cs from wastewater due to their unique structure. In this work, Cs + adsorbent for PBAs with Fe-Co framework, potassium iron hexacyanocobaltate (PBA Fe ), was synthesized by room temperature precipitation method. Systematic structural characterization and performance results of PBA Fe showed that it has a specific surface area of 452.8 m 2 /g and an average pore size of 8.6 nm, providing more active sites for Cs + . The adsorption of Cs + on PBA Fe exhibited fast reaction kinetics (within 10 min) and high adsorption capacity (82.90 mg/g), and the removal rate of Cs + reached 98.57 %. The efficient removal of Cs + by PBA Fe in various real water environments showed its excellent selectivity and potential for practical application. In addition, adsorption mechanism studies showed that the adsorption of Cs + was achieved by ion exchange with K + in the PBA Fe lattice. PBA Fe has the advantages of simple synthesis and good selectivity, and has potential application in the harmless treatment of Cs + in radioactive wastewater.