Efficient Removal of Phosphate from Aqueous Solutions Using Corundum-hollow-spheres Supported Caclined Hydrotalcite Porous Thin Films  

作　　者：刘云才 ZHU Chen LIU Yuncai;ZHU Chen(School of Architecture and Materials Engineering,Hubei Second Normal University,Wuhan 430205,China)

机构地区：[1]School of Architecture and Materials Engineering,Hubei Second Normal University,Wuhan 430205,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第1期44-49,共6页武汉理工大学学报（材料科学英文版）

基　　金：Supported by the Major Program of the Ministry of Education of the People’s Republic of China。

摘　　要：Phosphate was removed from aqueous environment by corundum-hollow-spheres supported caclined hydrotalcite (cHT) thin films. Mg-Al-CO3 hydrotalcite (HT) thin films were deposited on corundumhollow-sphere substrates by hydrothermal homogeneous precipitation at 120℃for 30-240 min and cHT thin films were obtained by annealing of the HT thin films at 500℃for 180 min. Their crystal phase, morphology and microstructure were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).The results show that homogeneous, well-crystallized and hierarchical flower-like thin films were deposited firmly on the surface of the corundum. The mechanism of nucleation and growth of the HT thin films was fitted well with the anion coordination polyhedron growth unit model. To determine the absorption of phosphate by this adsorbent, different bed depth (10-30 cm) and flow rate (1.0-3.0 m L/min) were examined by column experiments. The highest removal efficiency of phosphate amounted to 98.5%under optimum condition (pH=7.2). The adsorption capacity increased as the bed depth increased and decreased as the flow rate increased.

关 键 词：adsorption PHOSPHATE HYDROTALCITE corundum-hollow-sphere hydrothermal homogeneous precipitation thermal anneal 

分 类 号：X703[环境科学与工程—环境工程] TB383.2[一般工业技术—材料科学与工程] TQ424[化学工程]