Efficient separation of strontium ions from aqueous solution by dibenzo-18-crown-6 functionalized resin: Static and dynamic adsorption studies with computational DFT insights

Preparation of Porous Composite Phase Na Super Ionic Conductor Adsorbent by In Situ Process for Ultrafast and Efficient Strontium Adsorption from Wastewater

“…Among these purification methods, adsorption has attracted considerable scholarly attention owing to its low cost, simple operation, less susceptibility to secondary contamination, superior adsorption capacity, and selectivity for systems with low concentrations of the target ions [20,21]. Commercially available conventional adsorbents, such as zeolites [22], resins [23], activated carbon [24], and minerals [25],…”

Enhanced removal of Ce(iii) and Sr(ii) ions from aqueous solution using ultrasonication-assisted sawdust-TiO2 sorbent

“…52 Recent research has shown that there are various adsorbents used in the adsorption of Ce(III) and Sr(II) from wastewater. For instance, the extraction and separation of cerium(III) using a modified graphite adsorbent, 53 adsorption of Ce(III) onto cellulose/graphene composite, 54,55 capture of cerium(III) using a ligand, 56 adsorption of Ce 3+ ions by a hydrophobic ionic liquid, 57 capture of Sr 2+ ions by a layered potassium neodymium phosphate, 58 removal of Sr 2+ ions by potassium phosphatoantimonate, 59 performance of membranes for the separation of Sr 2+ ions, 60,61 separation of strontium by resin, 62 layered potassium calcium phosphate for Sr(II) removal, 63 selective Sr 2+ uptake by oxalates, 64 adsorption of strontium ions by a metal-organic framework, 65 adsorption of Sr(II) in acid solution by a porous silica, 66 and adsorption of strontium radionuclide onto zeolites. 9 Newly, many researches have focused on the removal of contaminants from polluted water using the adsorption process in the presence of ultrasound waves, which greatly helps the transfer and entry of the adsorbate ions into the pores of the absorbent material.…”

Study on Dynamic Column Behavior and Complexation Mechanism of DBS-Modified Crown Ether-Based Silica to 90Sr

“…In general, the metal ion separation ability of crown ethers could be explained by the compatibility of the polyether cavity size with the cation size and the hard and soft acids and bases principle-namely, the stability of the yielded complex mainly depends on the nature of the electron donors and the cation speciation in the aqueous solution [24,25]. Several experimental investigations have demonstrated that the principle of Sr(II) adsorption is mainly controlled by the interaction of Sr(II) with the oxygen in crown ethers to form Sr-O bonds [23,26]. Some theoretical studies have revealed the complexation mechanism of crown ethers with Sr(II) during the extraction process [27][28][29].…”