Synthesis of magnetic-carbon sorbent for removal of U(VI) from aqueous solution

An functional magnetic and carbon-based adsorbent, noted as Fe₃O₄@HTC-NaOH, was synthesized by hydrothermal and NaOH treatment processing. The results of FT-IR spectrum and ξ-potential showed the surface of Fe₃O₄@HTC-NaOH existed losts of f-lactonic and sodium carboxylic acid (COONa) groups and was relatively negative. The U(VI) adsorption capacities onto the Fe₃O₄@HTC-NaOH reached the maximum of 761.20 mg/g, showing a high efficiency for removal U(VI) from polluted water. In addition, the adsorption products can be readily separated from contaminated solutions using a magnet. The results indicated that Fe₃O₄@HTC-NaOH possessed potential application in the remediation of uranium polluted water and soil.