[1]汪爱河,池年平,盛建武,等.Ca-Fe-La三元金属氧化物颗粒的除氟性能[J].中国给水排水,2025,41(23):118-123.
　WANGAi-he,CHINian-ping,SHENGJian-wu,et al.Defluoridation Capability of Granular Ca-Fe-La Ternary Metal Oxide Composites[J].China Water & Wastewater,2025,41(23):118-123.
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Ca-Fe-La三元金属氧化物颗粒的除氟性能

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第41卷 期数: 2025年第23期 页码: 118-123 栏目: 出版日期: 2025-12-01
Title:
Defluoridation Capability of Granular Ca-Fe-La Ternary Metal Oxide Composites
作者:
汪爱河1,2， 池年平1,2， 盛建武1,2， 张伟1,2， 舒金锴2， 王存佩2， 廖子源2
（1.湖南省村镇饮用水水质安全保障工程技术研究中心，湖南 益阳 413000；2.湖南城市学院 市政与测绘工程学院，湖南 益阳 413000）
Author(s):
WANG　Ai-he1，2， CHI　Nian-ping1，2， SHENG　Jian-wu1，2， ZHANG　Wei1，2， SHU　Jin-kai2， WANG　Cun-pei2， LIAO　Zi-yuan2
（1. Hunan Provincial Village Drinking Water Quality Safety Engineering Technology Research Center， Yiyang 413000， China； 2. School of Municipal and Mapping Engineering， Hunan City University， Yiyang 413000， China）
关键词:
三元金属复合氧化物;  氟离子;  吸附;  去除机制
Keywords:
ternary metal oxide composite;  fluoride ion;  adsorption;  removal mechanism
摘要:
针对粉末三元金属氧化物处理含氟废水难分离的问题，以聚乙烯醇-海藻酸钠（PVA-SA）为包埋剂，将粉末Ca-Fe-La三元金属氧化物制备成颗粒除氟材料（PVA-SA-CCFL），分析PVA-SA-CCFL对模拟废水中氟离子的吸附性能，并采用扫描电子显微镜（SEM）、傅里叶变换红外光谱仪（FTIR）和X射线光电子能谱仪（XPS）对吸附前后的形貌进行表征，探讨其吸附机制。结果表明，溶液初始pH对PVA-SA-CCFL的除氟效果影响较小，在pH为2~8时均有较高的吸附率。共存阴离子PO43-、SO42-和NO3-对除氟效果影响较大，而HCO3-、CO32-的影响较小。PVA-SA-CCFL对氟的吸附符合准二级动力学方程以及Langmuir和Freundlich吸附等温模型；升温有利于吸附，在323 K条件下，PVA-SA-CCFL的最大理论吸附容量为46.66 mg/g。氟离子主要通过静电作用和羟基交换作用被去除。经过4轮循环再生后，PVA-SA-CCFL对氟仍然有78.16%的吸附率。
Abstract:
A granular fluoride removal material (PVA-SA-CCFL) was synthesized by immobilizing powder Ca-Fe-La ternary metal oxide composites using polyvinyl alcohol and sodium alginate as embedding agents, so as to address the challenge of poor separation associated with powdered ternary metal oxides in the treatment of fluoride-containing wastewater. The adsorption performance of the PVA-SA-CCFL toward fluoride ions was systematically evaluated using simulated wastewater. The morphological and structural characteristics of the adsorbent before and after adsorption were comprehensively analyzed using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X?ray photoelectron spectroscopy (XPS), based on which the potential adsorption mechanism was proposed and discussed. The initial pH of the solution exerted a relatively minor influence on the defluoridation performance of PVA-SA-CCFL, which maintained a high adsorption efficiency across a pH range of 2 to 8. The presence of coexisting anions, particularly PO43-, SO42-, and NO3-, significantly affected the material’s fluoride removal efficiency, whereas HCO3- and CO32- exhibited a comparatively minor influence. The experimental data exhibited a high degree of consistency with the results derived from the pseudo-second-order kinetic model, the Langmuir and the Freundlich adsorption isotherm models. Temperature elevation promoted the adsorption process. At 323 K, the maximum theoretical adsorption capacity of PVA-SA-CCFL reached 46.66 mg/g. Fluoride ions were primarily removed via electrostatic interactions and hydroxyl group exchange. After four cycles of regeneration, PAV-SA-CCFL maintained a fluoride adsorption efficiency of 78.16%.
更新日期/Last Update: 2025-12-01