Influnce of pH on the sorption of cadmium ions on calcium hydroxyapatite

Sorption of Selenite (SeO32−) on Hydroxyapatite: An Exchange Process

“…The effect of pH on the release of sodium is less significant, certainly due to its small proportion in the solid. The incongruent dissolution of this hydroxyapatite has been previously observed (10,16).…”

“…All phosphorus sites (6 per unit cell) are equivalent in the structure, while calcium is distributed in two sites, Ca(1) and Ca(2), the population of which are 4 and 6 atoms per unit cell, respectively. In HAP (Table 1), site Ca(2) is partially occupied (10,23). After selenite sorption, we observe the typical XRD spectrum of hydroxyapatites, with no additional lines, thus excluding detectable new phases.…”

A Crystallographic Study of the Sorption of Cadmium on Calcium Hydroxyapatites: Incidence of Cationic Vacancies

“…This point has already been discussed is 50 Ȑm and the thickness is about 3 Ȑm. BDH shows (10,14). FF19 is the most deficient in cations.…”

“…In a previcant modification of the unit cell parameters. Different ous work (14) we studied the influence of pH on the results were found for FF19 apatite. Large quantities of sorption of cadmium ions on BR apatite.…”

Influence of nickel on hydroxyapatite crystallization

“…In contrast to 1 (PO 4 ) and 2 (PO 4 ), the antisymmetric stretching vibration, 3 , is characterized by the splitting and displacement of the signal (six bands can be seen instead of the four observed in the CaHap crystal). This phenomenon (Fig.…”