Development and characterization of hydroxyapatite layered lanthanum organic frameworks by template method for defluoridation of water

Defluoridation using hydroxyapatite implanted lanthanum organic framework-based bio-hybrid beads

“…The developed bio-hybrid beads have elements on their structure like calcium (Ca 2+ ) and Lanthanum (La 3+ ) are also called Lewis acids. These Lewis acids interact with fluoride via electrostatic interaction 73 ( cf. Fig.…”

Outstanding fluoride removal from aqueous solution by a La-based adsorbent

“…It is evident that the values of E from 8 to 16 kJ mol −1 manifest that both ligand exchange and electrostatic attraction are the mainly mechanism. 3,43,[45][46][47] To portray the affinity between the F − and the La(COOH) 3 , the dimensionless constant separation factor (R L ) values calculated according to the literature 21,37 decline quickly with the increasing of initial F − concentrations in the range of 10-80 mg L −1 and approach to zero, manifesting that the adsorbing system is encouraged at even higher F − concentrations (Fig. S1 †).…”

High-efficiency N-doped activated carbon-based defluoridation adsorbent prepared from itaconic acid fermentation waste liquid

“…The adsorbent stability and reproducibility are essential factors in determining the adsorption performance. 34 Especially in commercial applications, the reusability of the adsorbent is the key to reducing the cost. To regain PC-N with adsorption performance, the adsorbed PC-N was added to 100 mL of 1 mol L À1 NaOH solution, then placed on a magnetic stirrer, and desorbed at 300 rpm for 6 h. Afterward, the desorbed adsorbent was washed and dried in an oven at 100 1C for 24 h. The outcome results are shown in Fig.…”