Effect of calcination temperature on hydroxyapatite in fluoride removal from groundwater: Process optimization and kinetic study
DESALINATION(2024)
摘要
The present study investigates the defluoridation capacity of calcium hydroxyapatite as an efficient and environmentally safe adsorbent material. Calcium hydroxyapatite was synthesized by co-precipitation route using Ca/P = 1.76 ratio followed by calcination at various temperature ranges (30-900 degrees C) and termed as CaHAP-T. The physical and chemical properties of CaHAP-T samples were analyzed by TGA, SEM, BET, XRD, TEM, UVDRS, FTIR, and NMR techniques. The CaHAP-900 sample exhibited exceptionally excellent thermal stability, crystallinity and ion-exchange capacity. Furthermore, the parametric studies revealed 98.12 +/- 1.03 % fluoride removal efficiency at 30 degrees C temperature and 30 min contact time at neutral pH using 1 g/50 mL of adsorbent dose. The well-fitted pseudo-second-order and intraparticle diffusion model indicates the chemisorption combined with diffusion control of fluoride ions sorption on CaHAP-900 adsorbent. This work offers a deep understanding of the removal of fluoride ions from contaminated groundwater in prevalent areas and the calcium hydroxyapatite (CaHAP-900) can be utilized as an efficient cost-effective adsorbent material.
更多查看译文
关键词
Adsorption kinetics,Field studies,Fluoride contamination,Water treatment
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要