一种改性凹凸棒土的制备方法及其在去除废水中氟离子中的应用

By loading Fe3+ and La3+ onto attapulgite using acid modification and impregnation-calcination methods, the problem of poor fluoride ion removal efficiency of attapulgite in water was solved, and the adsorption capacity was significantly improved.

CN117504808BActive Publication Date: 2026-07-17SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
Filing Date
2023-08-25
Publication Date
2026-07-17

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Abstract

本发明公开了一种改性凹凸棒土的制备方法及其在去除废水中氟离子中的应用，包括，将凹凸棒土与酸混合反应，水洗成中性，烘干、研磨，过筛制得酸改性凹凸棒土；将酸改性凹凸棒土加入到容器中，加入Fe(NO3)3·9H2O溶液和La(NO3)3·6H2O溶液，搅拌反应，过滤，水洗成中性、烘干，制得烘干后的产物；将烘干后的产物焙烧、研磨、过筛，得到改性凹凸棒土。改性后凹凸棒土对氟离子的吸附能力大幅提升，Fe3+与La3+之间存在协同作用，共同提高凹凸棒土体系降解氟离子的活性。
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