Preparation and Properties of Nano-hydroxyapatite Derived from Sol-gel Method for Cu~(2+) Polluted Water

摘要

Nano-hydroxyapatite (HAP) was prepared by sol-gel method with Ca(NO_3)2·4H_2O and H3PO4 precursors. The result was shown that the powder was spherical with very little reunion and the particle size was around 50nm. The HAP adsorbent was utilized for copper removal from aqueous solutions using the batch technique. Some parameters that determine copper ion uptake including contact time, adsorbent dose, the solution temperature and initial concentration of the copper in the aqueous solution were evaluated. The experimental results showed that a better removal efficiency was about 99.27 % at pH 7, 40°C, contact time 60 min, adsorbent dose of 5 g/L and initial concentration of 60 mg/L.