Fe/γ-Al2O3的制备及其在含氟废液吸附处理中的应用
Preparation of Fe/γ-Al2O3 and its application in adsorption treatment of fluoride containing wastewater
周智全 1徐欢欢 1邝海燕 1王平2
作者信息
- 1. 深圳骏信环境科技有限公司,广东 深圳 518000
- 2. 华南理工大学 化学与化工学院,广东 广州 510000
- 折叠
摘要
本文以γ-Al2O3 为吸附剂主体,采用FeSO4·7H2O溶液结合超声波技术对γ-Al2O3 进行改性得到载体活性氧化铝(Fe/γ-Al2O3).首先研究了Fe/γ-Al2O3 制备过程中FeSO4·7H2O投加量、FeSO4·7H2O溶液的pH值以及γ-Al2O3 投加量对Fe/γ-Al2O3 除氟效果的影响;最后经过静态吸附处理,研究了吸附剂Fe/γ-Al2O3 的投加量、吸附时间以及含氟废液pH值对F-去除效果的影响.结果表明,当FeSO·4 7H2O投加量为 0.1mol·L-1、pH值为 3～5、γ-Al2O3 与FeSO4·7H2O溶液的质量比为 5∶1 时,得到的Fe/γ-Al2O3 除氟效果最好;当Fe/γ-Al2O3 的投加量为 40g·L-1、吸附时间为 15h、含氟废液pH值为 3～9 时,除氟效果最好,且F-的去除率远高于同条件下的γ-Al2O3 吸附剂.
Abstract
In this paper,γ-Al2O3 was used as the main adsorbent,and FeSO4·7H2O solution combined with ultrasonic technology was used to modify of γ-Al2O3 to obtain carrier activated alumina(Fe/γ-Al2O3).Firstly,we studied the effect of amount of FeSO4·7H2O added during the preparation process of Fe/γ-Al2O3,the pH value of FeSO4·7H2O solution,and γ-Al2O3 dosage on the fluoride removal efficiency of Fe/γ-Al2O3;Finally,through static adsorption treatment,the dosage and adsorption time of adsorbent Fe/γ-Al2O3,as well as the pH value of fluoride containing wastewater on the removal efficiency of fluoride ions were studied.The results indicated that when the dosage of FeSO4·7H2O was 0.1mol·L-1,the pH was 3～5,the mass ratio of Fe/γ-Al2O3 to FeSO4·7H2O solution was 5∶1,the Fe/γ-Al2O3 had the best fluoride removal effect;When the Fe/γ-Al2O3 dosage was 40g·L-1,the adsorption time was 15h,and the pH value of the fluoride containing waste liquid was 3～9,the fluoride removal effect was best,and the removal rate of fluoride ions was much higher than that under the same conditions of γ-Al2O3 adsorbent.
关键词
载体活性氧化铝(Fe/γ-Al2O3)/超声波技术/含氟废液/吸附处理Key words
carrier activated alumina(Fe/γ-Al2O3)/ultrasonic technology/fluorinated wastewater/adsorption treatment引用本文复制引用
基金项目
广东省自然科学基金(2021A1515010220)
出版年
2024
NETL
NSTL
万方数据