Nanometer lanthanum hydroxide modified anionic polymer for deep fluoride removal: Adsorption properties and mechanism study
作者机构：Department of Resources and Environmental Engineering Wuhan University of Technology
出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))
年 卷 期：2023年第33卷第6期
页 面：833-842页
核心收录：
学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：supported by Hubei Province Science and Technology Program of China (Grant No. 2022BCA056)
主 题：Fluoride adsorption Anionic resin Industrial application Hydrated lanthanum oxide Industrial wastewater
摘 要：The development of chemical industry has brought about serious fluoride pollution,and there is an urgent need to develop an adsorbent with high efficiency and stability for fluoride *** the remarkable adsorption capacity of lanthanum hydroxide hydrate for fluoride ions,its industrial application is limited by powder leaching and strict pH *** this study,lanthanum-containing anionic resin(HLO-D201) was synthesized by the method of precursor introduction and in-situ deposition,mainly by introducing La3+into the resin,adding sodium hydroxide to precipitate it in the resin pore,forming hydrated lanthanum *** characterization analysis showed that hydrated lanthanum oxide(HLO) was successfully introduced into the porous matrix of the resin and existed in the form of crystalline hydrated *** adsorption experiments demonstrated that HLO-D201could effectively adsorb fluoride ions in a wide pH range(2-10).Since nano La(OH)3was encapsulated in the resin pore,the loss of La(OH) 3 was greatly reduced,and under the condition of competitive adsorption of several coexisting ions,Only phosphoric acid group interferes obviously with the adsorption of F-.The synthesized HLO-D201 still showed good adsorption capacity after regenerated by NaOH-NaCl composite solution for six *** removal mechanism of fluoride by HLO-D201 is mainly electrostatic attraction and ligand ***,HLO-D201 is a kind of fluorine removal adsorbent with excellent performance and wide application prospects.
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