Fabrication of hydroxyapatite embedded cerium-organic frameworks for fluoride capture from water

In this study, the hydroxyapatite (HAp) decorated Ce-BTC metal organic frameworks (MOFs) namely HAp-Ce-BTC MOFs was prepared using a simple template-directed layer-by-layer (LBL) method for the successful capture of fluoride from water. The developed HAp-Ce-BTC MOFs were evaluated through FTIR, XRD, SEM, elemental mapping, EDAX, TGA and DTA analysis. These results were exhibited that the successful fabrication of nanocomposites with altered morphologies. The adsorption ability of HAp-Ce-BTC MOFs on fluoride removal was explored with batch mode and HAp-Ce-BTC MOFs was identified to possess versatile adsorption property at broad range pH conditions and occurrence of the common ions present in water. On the whole, HAp-Ce-BTC MOFs on fluoride adsorption is spontaneous with endothermic in nature. The adsorption isotherm and kinetics studies were well fitted with Langmuir and pseudo-second-order model respectively. The major mechanism like electrostatic interaction and complexation involved in fluoride adsorption on HAp-Ce-BTC MOFs. The reusability and field studies of HAp-Ce-BTC MOFs indicate that they are regenerable and applicable at field environment. (C) 2022 Elsevier B.V. All rights reserved.

Automated summary

In this study, hydroxyapatite-decorated Ce-BTC metal organic frameworks (MOFs) were successfully prepared for the capture of fluoride from water. The developed HAp-Ce-BTC MOFs showed excellent adsorption performance and stability towards fluoride, and can effectively remove fluoride from water under different conditions.