Abstract
The leaked radioactive cesium is urgent to be eliminated due to the endangerment of human health and ecosystems. Herein, the layer-by-layer assembled ferrocyanide composite fibers were fabricated based on the coordination of phytic acid (PA) and Zn2+. The obtained Cs-adsorptive fibers (ZnFC/PA/PSF) showed the top-class adsorption capacity (524.67 mg/g) and fast kinetics (25 min). In addition, it exhibited excellent selectively towards Cs+ with the presence of various co-existing ions, which was further proved in geothermal water (distribution coefficient, Kd = 2.5 × 104 mL/g). Moreover, ZnFC/PA/PSF displayed favorable pH stability with negligible dissolution of Zn and Fe, and satisfied reusability after ten adsorption cycles. This work demonstrates that the ZnFC/PA/PSF composite fibers are eco-friendly and cost-effective adsorbent for the treatment of the Cs-contaminated water.
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