Preparation of hydroxyapatite nanostructures with different morphologies and adsorption behavior on seven heavy metals ions

Hydroxyapatite (HAP) nanostructures with different morphologies have been successfully synthesized in a facile method and the pH value of the solution has an important effect on morphology. Among them, the porous HAP nanospheres (NSs) with an average diameter of 76 nm were further employed as adsorbent to remove the heavy metal ions in solution. The BET surface area, pore size and pore volume of porous HAP NSs were 45.3 m2·g-1, 2.7 nm and 0.23...