Facile synthesis of potassium copper ferrocyanide composite particles for selective cesium removal from wastewater in the batch and continuous processes

Abstract

A composite potassium copper ferrocyanide particle adsorbent (CMC-KCuFC) was fabricated in this study,

Tuning the thermal stability of copper(II) hexacyanoferrate(II) nanoparticles

“…1,2,3,4,5,6,7,8,9,10 This is due to their high sorption capacity for caesium over a wide pH range, in high salinity, and their high stability. 11,12,13,14,15 In case of K-Hexacyanoferrates of transition metals, and especially Cu-HCF, the Cs + sorption mechanism occurs via an ionic exchange between K + from the solid structure and Cs + from the solution. 16 Although polynuclear supramolecular complexes these materials can also be classified as nanoparticles, (Figure 1).…”

Unveiling Cs-adsorption mechanism of Prussian blue analogs: Cs+-percolation via vacancies to complete dehydrated state

“…In the literature, G (K hyd ) and G (Cs hyd ) were reported to be −351.8 and −306.4 kJ mol −1 , respectively, 51 On the other hand, the adsorption energy Δ G was estimated at 69.087 kJ mol −1 . 52 From these values, Δ G hyd and Δ G ad are calculated at −45.4 kcal mol −1 and −23.7 kcal mol −1 , respectively, indicating that the energy gain by Cs + -adsorption mainly came from the difference in the hydrated states between K + and Cs + , and not from that in the adsorbed state.…”

Rational Design of Polyamine-Based Cryogels for Metal Ion Sorption

“…Transition metal ferrocyanides are the most efficient materials for selective uptake of cesium radionuclides from liquid radioactive wastes and natural waters; however, due to their small size and low mechanical strength, they cannot be used in columns without immobilization in organic or inorganic matrices, which can be realized under dynamic conditions [ 44 , 45 , 46 , 47 ]. Polymeric ligands can be used for the fabrication of such composite sorbents with several routes, in most cases, mechanically stable granulated materials were obtained by co-precipitation of polymer with transition metal ions and potassium ferrocyanide [ 48 , 49 ], but an inorganic phase can be also formed in situ via sequential loading of transition metal ions and [Fe(CN) 6 ] 4− anion [ 33 , 50 ]. We have demonstrated the feasibility of the latter approach for the fabrication of supermacroporous monolith sorbents on cryogel of carboxyethylchitosan [ 33 ], but PAA and PEI cryogels can be cheaper alternatives to the more expensive carboxyalkylchitosan-based matrices.…”