AI Article Synopsis
- A magnetic metal organic framework (MMOF) was developed to effectively separate strontium ions (Sr2+) from water, demonstrating significant structural integrity and an increase in strontium adsorption at higher pH values.
- The combination of Fe3O4 and UiO-66-NH2 was confirmed through chemical bonding analysis, with strontium concentration measured using advanced mass spectrometry techniques.
- The adsorption process followed the Freundlich isotherm model, indicating the MMOF's practicality as a separative tool for low-level radioactive strontium (90Sr) due to its magnetic properties, allowing for easy recovery using a magnetic field.
Article Abstract
A magnetic metal organic framework (MMOF) was synthesized and used to separate Sr2+ in aqueous solution. The shape and structure of prepared Fe3O4@UiO-66-NH2 were characterized, and the absorbed concentration of strontium was determined through inductively coupled plasma mass spectrometry. The results indicated that Fe3O4 and UiO-66-NH2 combined through chemical bonding. The experimental adsorption results for separation of Sr2+ in aqueous solution indicated that the adsorption of Sr2+ to Fe3O4@UiO-66-NH2 increased drastically from pH 11 to pH 13. The adsorption isotherm model indicated that the adsorption of Sr2+ conformed to the Freundlich isotherm model (R2 = 0.9919). The MMOF thus inherited the superior qualities of magnetic composites and metal organic frameworks, and can easily be separated under an external magnetic field. This MMOF thus has potential applications as a magnetic adsorbent for low level radionuclide 90Sr.
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| http://dx.doi.org/10.3967/bes2018.065 | DOI Listing |
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