期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 6, 期 1, 页码 1347-1352出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2018.01.052
关键词
Phosphogypsum; Hydroxyapatite; Nanorods; Hydrothermal; Surfactant
资金
- Otto Bayer Fellowship [F-2017-BS-0121]
Hydroxyapatite (HAp) nanorods are synthesized from phosphogypsum waste (PG) and potassium dihydrogen phosphate (KH2PO4) under hydrothermal conditions. The influence of several synthesis parameters such as temperature (100-200 degrees C), synthesis time (1-15 h), and solution pH (5-11) on product structure and purity is addressed by X-ray diffraction and Fourier Transformed-Infrared Spectroscopy. Phase-pure HAp nanorods with diameter and length of 18 and 63 nm, respectively, are obtained after 10 h at 200 degrees C and pH similar to 11. The influence of Brij-93 surfactant on the morphology of prepared HAp is investigated by transmission and scanning electron microscopy. The aspect ratio and the mean size of HAp crystals increase to 1013 and 205 x 20 nm, respectively, with increasing the concentration of Brij-93 surfactant to 0.01 mol. Hence, the PG recycling could be accomplished using an easy synthesis route with relatively cheap reactants for the production of nanocrytalline HAp.
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