The shape of the growing crystalsduring creation of nano-hydroxyapatite materialsis influenced critically by the source of calcium salt.Hydroxyapatite may be utilized in a wide range of applications due to its various morphological structures.Four samples of nano-hydroxyapatite were synthesized using inexpensive and readily available calcium salt sources. Samples have also been characterized and analyzed via XRD, FTIR, SEM, TG, and SBET methods. The weight losses for the HAp samples investigated varied from 1% to 3%, indicating that they were all thermally stable.During the interaction of various calcium ions with concentrated phosphoric acid, the presence of various anions throughout the preparation process acts as a structure shaping agent. Coral reef-shape, Sticks, nano-sheet and cotton-shape morphological structures resulted according to SEM analyses. All tested materials showed a high surface area following the order HA-Cl (162.73 m2/g) > HA-OH (136.32 m2/g) > HA-AC (135.27 m2/g) > HA-NO3 (115.98 m2 / g).The hydroxyapatites studied have crystallite sizes ranging from 14.85 to 25.72 nm, putting them on the Nano scale.Tested hydroxyapatite materials were effectively utilized to remove contaminants such as Fe3+ and Mn2+ from water with efficiencies of up to 95%.The total cost ranged from 258-386 EGP/100g (13.02-19.47) €/100g, including electricity costs.