In situ synthesis of MIL-53-type eco-MOF from high-alumina fly ash for efficiently removing fluoride from water
作者机构：State Key Laboratory of Water Resource Protection and Utilization in Coal Mining National Institute of Clean and Low Carbon Energy School of Chemical and Environmental Engineering China University of Mining and 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5期
页 面：681-690页
核心收录：
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术]
基 金：financially supported by the Open Fund of State Key Laboratory of Water Resource Protection and Utilization in Coal Mining(WPUKFJJ2019-10) the National Key Research and Development Program of China (2019YFC1904304) the Fundamental Research Funds for the Central Universities (2023ZKPYHH05)
主 题：Fluoride Fly ash Defluoridation Metal-organic frameworks Adsorption
摘 要：Facing ubiquitous fluoride pollution in aquatic environments and ever-increasing discharge of coal fly ashes,this study aims to in situ synthesize a kind of Al-based metal-organic framework eco-material(eco-MOF) using highalumina fly ash as metal raw material,and apply the obtained adsorbent to efficiently adsorb fluoride in *** synthesized eco-MIL-53(Al) exhibits excellent thermal stability,showcasing a consistent morphology of fine columnar crystals and possessing a high specific surface area(353 m2·g-1).Moreover,the adsorption isotherm demonstrates a strong agreement with the Langmuir isotherm model,indicative of a maximum uptake quantity of160 mg·g-1at 318 *** addition,fluoride adsorption experiments demonstrate that an increased dosage enhances the adsorption efficiency,the higher water pH value diminishes the removal efficiency,and the impact of coexisting anions is ***,the adsorption capacity is augmented with increasing temperature at high initial fluoride concentrations,but shows negligible variation at low initial fluoride *** is worth noting that the desiliconization filtrate can be applied to synthesize ZSM-5 zeolite,realizing the total utilization of fly *** present work provides a novel platform that would serve as a mutually beneficial reference for managing the environmental risks of fluoride and waste resource utilization.
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