Highly enhanced adsorption performance to uranium(VI) by facile synthesized hydroxyapatite aerogel.

In order to protect environment and save uranium resources, it was necessary to find a highly efficient adsorbent for uranium recovery from wastewater. In this work, we used a freeze-drying-calcination method to synthesize HAP aerogel to effectively remove uranium. Compared with commercially available nano-hydroxyapatite, HAP aerogel presented better adsorption performance. This was because the as-prepared HAP aerogel presented continuous porous structure, which could provide more active sites for the adsorption to uranium. The uranium removal efficiency of HAP aerogel arrived 99.4% within 10 min and the maximum adsorption capacity was up to 2087.6 mg g-1 at pH = 4.0 and 298 K. In addition, the immobilization of uranium on HAP aerogel was chemisorption, which was probably due to adsorption, dissolution-precipitation and ions exchange. These results indicated that the as-prepared HAP aerogel could be widely used as a high efficiency and potential adsorbent for the treatment of uranium-containing wastewater in the future. Copyright © 2021 Elsevier B.V. All rights reserved.

Citation

Ting Xiong, Qichen Li, Jun Liao, Yong Zhang, Wenkun Zhu. Highly enhanced adsorption performance to uranium(VI) by facile synthesized hydroxyapatite aerogel. Journal of hazardous materials. 2022 Feb 05;423(Pt B):127184

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PMID: 34536844

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