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Remarkable enhancement in radio-cesium uptake from acidic feeds into an extraction chromatography resin containing a calix[4]arene-mono-crown-6 ligand.
J Chromatogr A
August 2024
Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai, 400 094, India. Electronic address:
An extraction chromatography resin, prepared by the impregnation of bis-octyloxy-calix[4]arene-mono-crown-6 (BOCMC)onto an acrylic ester based polymeric support material, gave excellent uptake data for the removal of radio-cesium (Cs-137) from nitric acid feed solutions. The weight distribution coefficient (K) value of >300 obtained during the present study at 3 M HNO was the highest reported so far while using a calix-crown-6 based extraction chromatographic resin material. Analogous resin reported previously has yielded a K value <100 at comparable feed conditions.
View Article and Find Full Text PDFKinetic properties of Cs uptake by the cesium-accumulating eustigmatophycean microalga.
Environ Sci Pollut Res Int
March 2023
Algae and Biomass Research Laboratory, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
Cesium-137 (Cs) is one of the radioactive substances that was released into the environment as a result of the Fukushima nuclear disaster. Radiocesium exposure is of great concern due to its potential environmental implications. However, research on Cs removal using algae is still limited.
View Article and Find Full Text PDFSelective and effective adsorption of cesium ions by metal hexacyanoferrates (MHCF, M = Cu, Co, Ni) modified chitosan fibrous biosorbent.
Sci Total Environ
August 2022
Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China; Beijing Key Laboratory of Radioactive Waste Treatment, INET, Tsinghua University, Beijing 100084, PR China. Electronic address:
Selective and effective adsorptive removal of radiocesium is of great importance in terms of nuclear waste management and environmental remediation, but is still challenging because of its radioactive and non-complexing nature. Herein, metal hexacyanoferrates (MHCF, M = Cu, Co, or Ni) modified fibrous chitosan was prepared by multiple sequential adsorption and self-assembly approach, and applied for the selective and effective adsorption of Cs. The physically supported MHCF in chitosan fibers showed good crystallinity and stability, and the obtained fibrous composite has high specific surface area (18.
View Article and Find Full Text PDFHigh-capacity recovery of Cs ions by facilely synthesized layered vanadyl oxalatophosphates with the clear insight into remediation mechanism.
J Hazard Mater
July 2022
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China; Fujian Province Joint Innovation Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, PR China.
Radiocesium remediation is of great significance for the sustainable development of nuclear energy and ecological protection. It is very challenging for the effective recovery of Cs from aqueous solutions due to its strong radioactivity, solubility and mobility. Herein, the efficient recovery of Cs ions has been achieved by three layered vanadyl oxalatophosphates, namely (NH)[(VO)(HPO)CO]·5 HO (NVPC), Na[(VO)(HPO)CO]·2 HO (SVPC), and K[(VO)(HPO)(PO)(CO)]·4.
View Article and Find Full Text PDFHighly Efficient Uptake of Cs by Robust Layered Metal-Organic Frameworks with a Distinctive Ion Exchange Mechanism.
JACS Au
February 2022
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
Cs with strong radioactivity and a long half-life is highly hazardous to human health and the environment. The efficient removal of Cs from complex solutions is still challenging because of its high solubility and easy mobility and the influence of interfering ions. It is highly desirable to develop effective scavengers for radiocesium remediation.
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