摘要
通过浸渍-热分解法对硅藻土陶瓷膜进行表面修饰,制备MgO/SiO_2荷正电陶瓷微滤膜,利用SEM、FT-IR、XRD、Zeta电势等技术对其组成结构及电性能进行分析.结果表明,荷电剂为立方相的MgO,且MgO牢固负载在陶瓷膜的表面,同时未改变基膜的微孔结构.在Mg^(2+)浓度为0.3mg/L、煅烧温度600℃条件下制备的荷电膜Zeta电势为21.5mV,对水中达旦黄的去除率可达99.0%,达旦黄饱和吸附量为3.07mg/cm^3.这表明通过浸渍-热分解法制备的MgO/SiO_2荷正电陶瓷微滤膜结构完整,具有较好的正电性能和达旦黄吸附性能,在染料废水处理领域将有很好的应用前景.
The MgO/SiO2 ceramic microfiltration membrane was fabricated through dip-coating and calcining process. The composition structure and electrical properties of the charged membrane were analyzed by SEM（scanning electron microscope）, FT-IR（Flourier transform infrared spectrometer）, XRD （X-ray diffraction） and Zeta potentials. The results show that the charge agent is cubic MgO, and MgO is firmly supported on the surface of the ceramic membrane without changing the microporous structure. The Zeta potential of the charged membrane prepared at the Mg^2＋＋ concentration of 0. 3 mg/L and the calcination temperature of 600 ℃was 21.5 inV. Under certain conditions, the removal rate of Titan yellow in water reaches 99. 0%, and the saturated adsorption capacity of Titan yellow is 3. 07 mg/cma. This indicates that the MgO/SiO2 charged positive ceramic microfiltration membrane can be prepared by impregnation thermal decomposition method, and has good positive electrical properties and adsorption performance and it will have a good application prospect in dye wastewater treatment field.
作者
孟仙
邓橙
朱孟府
邓宇
马军
田涛
刘红斌
MENG Xian DENG Cheng ZHUMengfu DENG Yu MA Jun TIAN Tao LIU Hongbin(Institute of Chemical Engineering and Materials, Tianjin University of Science and Technology, Tianiin 300457, China Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2017年第3期68-73,共6页
Membrane Science and Technology
基金
国家自然科学基金项目资助(51202292)
关键词
氧化镁
荷电陶瓷膜
达旦黄
正电性
magnesium oxide
charged ceramic membranel Titan yellow
electropositive
