镧铁复合吸附剂的制备及除磷性能

采用液相沉积法制备了复合除磷吸附剂——镧铁活性炭纤维(LaFe-activated carbon fiber, LaFe-ACF), 讨论了铁镧摩尔比、金属离子总浓度单因素对制备材料的影响. 结果表明, 制备LaFe-ACF 的最佳铁镧摩尔比为3∶7,最佳金属离子溶液浓度为0.15 mol/L. 分别采用静态法和动态法考察了LaFe-ACF的吸附除磷性能. LaFe-ACF 的静态吸附结果表明, Langmuir吸附等温线能很好地描述吸附过程, 说明LaFe-ACF除磷是单分子层吸附过程, 且其最大吸附量计算值为29.44 mg/g.

Preparation and Phosphorus Removal of Complex Phosphate Adsorbent from Lanthanum and Iron

Complex phosphate adsorbent, denoted as LaFe-activated carbon fiber (LaFe-ACF), was prepared from lanthanum, iron and activated carbon fiber using a liquid phase deposition method. Single factors such as Fe/La ratio and total concentration of metal ions were discussed. The results show that the best Fe/La ratio is 3∶7, and the best concentration of metal ion solution is 0.15 mol/L. The phosphorus removal performance of LaFe-ACF was investigated in static and dynamic adsorption experiments. The isothermal adsorption study of the LaFe-ACF showed that Langmuir isotherm fit the experimental data quite well, indicating that the adsorption process was mainly through single-molecule chemisorption on the surface, and the maximum adsorption capacity was 29.44 mg/g.