Abstract
Due to the pore structure and specific surface area of hydroxyapatite (HA), they facilitate their application as an adsorbent material. Herein, assembled from nano-particles, a high specific surface area and porous HA has been synthesized by bacterial induction. The morphology and structure of the as-synthesized products were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, and Brunauer–Emmett–Teller gas sorptometry analyses. The results indicated that the HA with high specific surface area (196.7 m2/g) were prepared successfully. Notably, the batch adsorption experiment for uranyl ions (UO22+) indicated that the maximum adsorption capacity was 1025 mg/g, and the adsorption process remained consistent with the linear pseudo-second-order kinetic and nonlinear Liu isotherm adsorption models. The desorption effect was good (the desorption rate reached 97.94%). And it has excellent biocompatibility. Ultimately, a possible adsorption mechanism for the HA nanoparticles was proposed.
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