1,721,009 research outputs found
Electroadsorption of cesium ion using zinc hexacyanoferrate composite derived from a zeolitic imidazolate framework
No full textSynthesis and utilization of optimal ZnHCF-ZDC adsorbent for electrochemical cesium ion removal via pyrolyzed ZIF
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Simultaneous removal of radioactive Cs+ and Sr2+ ions from wastewater by facile solid state alkali activation of montmorillonite
No full textImmobilization of KTS-3 on an electrospun fiber membrane for efficient removal of Cs+ and Sr2+
No full textThe need to treat radioactive aqueous waste has increased, and decontamination of such waste is of high priority. This study demonstrates a method of fabricating a new composite membrane to effectively remove Cs+ and Sr2+ ions using KTS-3, a metal sulfide ion exchanger. The study utilized an electrospinning method to fabricate polyacrylonitrile (PAN) nanofiber support to immobilize the adsorbent KTS-3. Through pulverization using ball milling, KTS-3 was dispersed evenly and fixed to the PAN support which offered high water-permeability and large surface area. The ratio of KTS-3 to the polymer support was optimized to maximize the adsorption performance of the composite membrane. Consequently, we obtained high maximum adsorption capacities of 133.6 and 32.4 mg g− 1 for Cs+ and Sr2+, respectively. Moreover, the high adsorption capacity was kept in the filtration test when the flux reaches 2000 L m− 2 h− 1. The newly fabricated material provides an attractive strategy to utilize adsorbents effectively for the continuous selective removal of radionuclides from contaminated wastewater
Amino-functionalized magnetic chitosan beads to enhance immobilization of potassium copper hexacyanoferrate for selective Cs+ removal and facile recovery
Full text linkPotassium copper hexacyanoferrate (KCuHCF)-incorporated magnetic chitosan beads (HMC) were synthesized for both selective Cs+ removal in aqueous solutions and facile recovery of the spent adsorbent. To disperse and immobilize large amounts of the KCuHCF, methyl acrylate and diethylenetriamine were sequentially grafted onto the one-step synthesized magnetic chitosan beads. The additional introduction of amino functionality led to the enriched Cu2+ ions on the bead surface to incorporate KCuHCF into the grafting matrix. Consequently, the HMC exhibited a high Cs+ capacity calculated to be 136.47 mg g−1 from the Langmuir model, and the equilibrium was established within 4 h. Moreover, the HMC exhibited excellent stability in a wide pH range from 4 to 11 and an outstanding Cs+ selectivity (>97%) in seawater (1.11 mg L−1 Cs+). From a practical point of view, the HMC was stable during five successive adsorption cycles and easily recovered by magnets, enabling continuous operation to decontaminate a large volume of wastewater
Potassium Copper Hexacyanoferrate-Embedded Doubly-Crosslinked Magnetic Hydrogel for Effective Cs+ Removal and Facile Recovery
No full textEffective Immobilization of Potassium Copper Hexacyanoferrate Via Amino-Functionalization of Magnetic Chitosan Adsorbent for Selective Cs+ Separation
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