NGHIÊN CỨU TỔNG HỢP BỘT HYDROXYAPATIT PHA TẠP Ba (Ba-HAp) ỨNG DỤNG TRONG XỬ LÝ ION Cd2+

Tóm tắt

Hydroxyapatite doped barium powder (Ba-HAp) was synthesized by chemical precipitation method
from Ca(OH)2, Ba(OH)2 and H3PO4 at pH 10 - 12. Effect of factors such as Ba2+ concentration,
synthesis temperature on phase structure of Ba-HAp powder was investigated. The results show that
low concentrations of Ba2+ (XBa = 0.05 to 0.3), Ba-HAp powders have crystalline structure, single
phase of HAp. At a ratio XBa = 0.3, Ba-HAp powder has spherical shape with average diameter 65 nm
and the barium acts as a doping element in their composition (8.25 wt.%). Factors affect Cd2+
treatment efficiency of Ba-HAp powder (XBa = 0.3) which were also studied. At a temperature of 70°C,
pH = 2, 0.2 g Ba-HAp powder can treat of 50 ml Cd2+ 562 mg/l with high efficiency (95%).