NGHIÊN CỨU XỬ LÝ PHOSPHAT TRONG NƯỚC BẰNG VẬT LIỆU NANO ZnO

Tóm tắt

In this study, ZnO nanoparticles made by hydrothermal method for adsorption of phosphate from
water. These ZnO nanorods are characterized by a powder X-ray diffraction spectroscopy (XRD),
scanning electron microscope (SEM), specific surface area (BET), energy dispersive X-ray
spectroscopy (EDS). The ZnO materials were applied for adsorption of phosphate from water using
batch experiments. The effects of pH (4 - 10), adsorption time (30 - 240 min), the amount of adsorbent
(0.005 - 0.035 g), and initial concentration of phosphate (147.637 - 466.209 mg/L) on the adsorption
were investigated. The optimum condition was found at pH = 5, at adsorption time of 150 min. The
adsorption was fitted well with Langmuir isotherm and the maximum adsorption capacity was
calculated to be 769.23mg/g. These results show that ZnO material would be a very promising material
for adsorption of phosphate from water.
Keywords: ZnO, nanoparticles, hydrothermal methodfor, phosphate, Aqueous solution.