吸附
氟化物
水溶液
傅里叶变换红外光谱
朗缪尔吸附模型
煅烧
无机化学
材料科学
复合数
扫描电子显微镜
化学工程
化学
核化学
催化作用
复合材料
物理化学
有机化学
工程类
作者
Wei Zhao,Yuantao Chen,Wei Zhang,Jian Wang,Chunlian Hu,He Wenfang
摘要
In this study the Mg-Fe-Al trimetal composite was successfully synthesized by an easy co-precipitation method and used as the adsorbent for fluoride removal from aqueous solutions. Synthetic conditions such as Mg/Fe/Al molar ratio and calcination temperature were studied to optimize the adsorbent. The adsorbents were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and Fourier transform infrared (FTIR). Batch adsorption studies were conducted under various conditions, such as different fluoride concentration, contact time, temperature, initial solution pH, and coexisting anions. Results indicated that the adsorbent obtained the maximum adsorption capacity of 92.85 mg/g for fluoride with a Mg/Fe/Al molar ratio of 30:1:4, calcined at 500 °C, at near-neutral pH and room temperature (25 °C). The adsorption data were fitted well with the Langmuir isotherm model and the pseudo-first order kinetic model. The adsorption mechanism involved electrostatic interaction on the surface, ion exchange interaction, and reconstruction of original layered structure by rehydration of mixed metal oxides. All results indicated that the Mg-Fe-Al trimetal composite can be a very promising material, has potential application in the removal of fluoride in water treatment, and has positive effects on human health.
科研通智能强力驱动
Strongly Powered by AbleSci AI