A novel Fe-Al-La composite adsorbent was synthesized via the co-precipitation method for water defluorination. The adsorbent was characterized by XRD, BET, SEM/EDS, and FT-IR. Its adsorption behavior was thoroughly carried out to investigate the fluoride removal performance in synthetic and real groundwater samples. The Langmuir model was found to describe the adsorption isotherm, presenting a maximum adsorption capacity of 28.06 mg g^-1 at 298 K and pH = 8.25. The adsorbent material's fluoride removal performance can be associated with the synergistic effect of some properties such as amorphous structure, porosity, and Fe-Al-La interactions in the surface material. The linear driving force model was successfully used for describing the adsorption capacity with a surface diffusion ranging from 3.52 to 5.928 ×10-9 cm² s^-1. Results showed that the new composite might be applied to remove fluoride from water aiming at human consumption, achieving the established permissible limit for Water Health Organization (<1.5 mg L^-1).

采用共沉淀法合成了一种新型的Fe-Al-La复合吸附剂用于水脱氟。通过XRD、BET、SEM/EDS和FT-IR对吸附剂进行表征。对其吸附行为进行了彻底的研究，以研究合成和实际地下水样品中的氟化物去除性能。Langmuir模型被发现描述吸附等温线，呈现28.06的最大吸附容量 毫克 克^-1在298 K 和 pH = 8.25。吸附材料的除氟性能可能与表面材料中一些特性的协同效应有关，例如无定形结构、孔隙率和 Fe-Al-La 相互作用。线性驱动力模型成功地用于描述表面扩散范围为 3.52 到 5.928 ×10-9 cm ² s ^-1的吸附容量。结果表明，新复合材料可用于去除供人类消费的水中的氟化物，达到水卫生组织规定的允许限值（<1.5  mg  L ^-1）。