Removal of cesium from low-level radioactive wastewaters using magnetic potassium titanium hexacyanoferrate

Solvent-assisted synthesis of potassium copper hexacyanoferrate embedded 3D-interconnected porous hydrogel for highly selective and rapid cesium ion removal

“…which are often present in contaminated effluents [1,4,5,[16][17][18]. Since metal HCF has a well-known perovskite-like face-centered cubic crystal structure, with a channel diameter of around 3.2 Å, small hydrated cations such as Cs + can be inserted, whereas the larger hydrated ions such as Na + are selectively rejected [4,19].…”

“…Since metal HCF has a well-known perovskite-like face-centered cubic crystal structure, with a channel diameter of around 3.2 Å, small hydrated cations such as Cs + can be inserted, whereas the larger hydrated ions such as Na + are selectively rejected [4,19]. Particularly, copper hexacyanoferrate has been widely used due to its simple preparation, low cost, superior Cs + capture properties, and chemical stability over a wide pH range [3,17,18,20]. In spite of the advantageous structural properties for the selective removal of Cs + , one of the main drawbacks of the adsorbent is related to its ultra-fine particle size, increasing the difficulty to remove the occupied ion exchangers following adsorption [21].…”

Dedoped Fe3O4/PPy nanocomposite with high anti-interfering ability for effective separation of Ag(I) from mixed metal-ion solution

“…Among these approaches, solid phase extraction is recognized to be superior to the others, in terms of simplicity, flexibility, time-saving, and low cost [6,8]. Recently, solid phase extraction with magnetic composites has been subjected to extensive research, because of their wide applications in enzyme immobilization [19], DNA extraction [20], targeted drug delivery [21], and pre-concentration/removal of various metal ions [6,16,17,[22][23][24][25][26][27].…”

“…Considering that the magnetic force directing particles toward magnet is proportional to magnetic field gradient as well as to magnetization and volume of the particles [28,30], encapsulation of magnetite nanoparticles into nonmagnetic matrix is an alternative strategy to construct magnetic composites with enhanced volume, and hence high magnetization and superparamagnetism. As for surface functionality, amino groups upon magnetic composites have been well documented to facilely combine with metal clusters [31], metal ions [22][23][24][25][26][27][28], drug [32], and biomolecules [20]. In view of polyaniline (PANI) and polypyrrole (PPy) being eco-friendly and wealthy in amino groups, Fe 3 O 4 /PANI and Fe 3 O 4 /PPy composite microspheres with core-shell structure and superparamagnetism have attracted much attention on the basis of their excellent performance in DNA extraction [20] and metal ion removal [24][25][26].…”

Highly effective Cs+ removal by turbidity-free potassium copper hexacyanoferrate-immobilized magnetic hydrogels

“…Magnetic separation, mainly using Fe3O4 nanoparticles, is a facile method to recover adsorbent from wastewater, and has been used for the treatment of heavy metal and organic pollutants. Many researchers have devised methods to combine HCFs and Fe3O4 nanoparticles for the integrated process of effective Cs + removal and rapid separation [25][26][27].…”