通过共沉淀法合成锶掺杂羟基磷灰石（Sr-HAP），并将其用于水中氟离子的去除。结果表明，少量锶掺杂提高了HAP比表面积，从而暴露出更多的活性OH^-位点；Sr-HAP对氟离子的吸附符合Langmuir模型和拟二级动力学模型，通过模型拟合计算出对氟离子的q_m为20.75 mg/g；偏酸性和中性条件下，Sr-HAP对氟离子的吸附效果稳定；Sr-HAP吸附除氟的机理主要是静电吸引作用和离子交换。

Strontium-doped hydroxyapatite (Sr-HAP) is synthesized via co-precipitation method and applied for removing fluoride ion from aqueous solution.A small amount of Sr doping increases efficiently specific surface area of HAP, thereby exposing more active hydroxyl sites.The adsorption behaviors of F^- by Sr-HAP follow the Langmuir model and the pseudo-second-order kinetic model.It is found through model fitting calculation that the maximum adsorption capacity of fluoride ion by Sr-HAP is 20.75 mg·g^-1.Both acidic and neutral environments are favorable for F^- adsorption.It is suggested that electrostatic interaction and ion exchange are the main adsorption mechanisms of F^- by Sr-HAP.

刘雨秋(1997-),男,硕士研究生,研究方向为水体中氟污染物去除,771916279@qq.com。