Preparation of amino-modified hydroxyapatite and its uranium adsorption properties
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The amino-hydroxyapatite (HAP-NH2) was synthesized by grafted amino functional groups onto hydroxyapatite. The uranium adsorption performance of HAP-NH2 was studied under different conditions. The results indicated that HAP-NH2 possessed high adsorption capacity (96 mg g−1), wide pH values range (2–8) and fast adsorption rate (20 min). The adsorption kinetic and adsorption isotherm models of HAP-NH2 revealed that the uranium adsorption process was belonged to chemical adsorption. Furthermore, the main forces between uranium ions and HAP-NH2 were attributed to hydroxyl, amino and phosphorous functional groups.
KeywordsHydroxyapatite Amino modified Uranium Adsorption
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51702189, 51802176, 51472146), Shandong Provincial Natural Science Foundation (Grant Nos. ZR2017BEM033, ZR2017QEM002), and Science and Technology Development Project of Shandong Province (2014GZX201008).
- 5.Chai LY, Wang X, Wang HY et al (2017) Formation of one-dimensional composites of poly(m-phenylenediamine)s based on Streptomyces, for adsorption of hexavalent chromium. Int J Environ Sci Technol 15(7):1–12Google Scholar
- 22.Frendlich HMA (1906) Concerning adsorption in solutions. J Phys Chem 57:385Google Scholar
- 26.Sun Y, Yang S, Sheng G et al (2012) The removal of U(VI) from aqueous solution by oxidized multiwalled carbon nanotubes. J Radioanal Nucl Chem 105:40–47Google Scholar
- 28.Chen Z, Zeng G, Tang C (2009) Adsorption of uranium from wastewater by hydroxyapatite. Met Min 5:135–137Google Scholar