[1]黄媛媛,杨清伟,雷晓玲,等.羟基磷灰石吸附处理高氟水源水的效果及机制[J].中国给水排水,2024,40(17):49-56.
　HUANGYuan-yuan,YANGQing-wei,LEIXiao-ling,et al.Hydroxyapatite Adsorption Treatment of High Fluoride Source Water：Effect, Influencing Factors and Mechanism[J].China Water & Wastewater,2024,40(17):49-56.
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羟基磷灰石吸附处理高氟水源水的效果及机制

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第17期 页码: 49-56 栏目: 出版日期: 2024-09-01
Title:
Hydroxyapatite Adsorption Treatment of High Fluoride Source Water：Effect, Influencing Factors and Mechanism
作者:
黄媛媛1,2， 杨清伟1， 雷晓玲1,2， 肖琴1， 冉洪杰1
（1.重庆交通大学 河海学院，重庆 400074；2.重庆市科学技术研究院，重庆 401123）
Author(s):
HUANG　Yuan-yuan1，2， YANG　Qing-wei1， LEI　Xiao-ling1，2， XIAO　Qin1， RAN　Hong-jie1
（1. College of River and Ocean Engineering， Chongqing Jiaotong University， Chongqing 400074， China； 2. Chongqing Academy of Science and Technology， Chongqing 401123， China）
关键词:
羟基磷灰石;  氟;  吸附;  吸附热力学;  吸附动力学
Keywords:
（1. College of River and Ocean Engineering;  Chongqing Jiaotong University;  Chongqing 400074;  China;  2. Chongqing Academy of Science and Technology;  Chongqing 401123;  China）
摘要:
水中氟含量超标对人体健康和生态环境均会产生影响，为有效去除水源水中的氟化物，采用环境友好型的羟基磷灰石（HAP）作为吸附材料，探究HAP对氟化物的去除效能和机制。结果表明，在pH为3、HAP投加量为5.5 g/L、振荡20 min后静置沉淀10 min的条件下，对氟的去除效果最佳，去除率为94.61%，并且去除效果受CO32-、HCO3-、SO42-和Cl-的影响；另外，使用颗粒状的HAP填充吸附柱有较好的吸附效果，但吸附效果弱于粉状HAP。吸附热力学和动力学分析表明，HAP吸附F-遵循Freundlich模型和拟二级动力学模型，属于吸热反应，过程以多层化学吸附为主，并且吸附速率并不只受颗粒内扩散的影响；结合Zeta电位、FT-IR表征和XPS分析，静电相互作用以及羟基与氟离子之间的离子交换是HAP吸附氟离子的主要作用机理。
Abstract:
The excessive fluorine content in water has an impact on human health and the ecological environment. To effectively remove fluoride from the water source, the environmentally friendly hydroxyapatite (HAP) was employed as an adsorption material to investigate its efficiency and mechanism in fluoride removal. When the pH was 3, the dosage of HAP was 5.5 g/L, with shaking for 20 minutes and static sedimentation for 10 minutes, the removal rate of fluorine reached the maximum of 94.61%, and the removal efficiency was affected by CO32-, HCO3-, SO42- and Cl-. Additionally, the adsorption performance of the adsorption column packed with granular HAP was superior, yet it was less potent than that of powdered HAP. The adsorption thermodynamics and kinetics revealed that the adsorption of F- by HAP conformed to the Freundlich model and the pseudo-second-order kinetic model, and was classified as an endothermic reaction. The process was dominated by multilayer chemisorption, and the adsorption rate was not merely influenced by intraparticle diffusion. The Zeta potential, FT?IR characterization, and XPS analysis indicated that electrostatic interaction and ion exchange between hydroxyl and fluoride ions constituted the main mechanisms of fluoride ions adsorption by HAP.
更新日期/Last Update: 2024-09-01