State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China.
School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, 300384, China.
Chemosphere. 2021 Jun;273:129628. doi: 10.1016/j.chemosphere.2021.129628. Epub 2021 Jan 16.
Aluminosilicate composite materials are characterized by their low cost, nontoxicity and facilely shaped. Membrane prepared using aluminosilicate composites have the following disadvantages: large mean pore size and low mechanical strength. To address these limitations, flat microfiltration membranes were fabricated using SiO powder and aluminosilicate composite as raw materials. The membrane performance was optimized by regulating the particle size of SiO, the ratio of SiO to aluminosilicate composite (s/a), and the type of chemical admixture. The X-ray diffraction results indicated that the crystalline SiO particles were favorable for the preparation of membranes with higher bending strengths. The decreasing particle sizes of SiO (1.33-0.15 μm) decreased the pore size distribution. The bending strength of the membrane reduced with an increase in s/a, while was effectively enhanced by adding dissolved NaSiO. The optimized inorganic microfiltration membrane could also catalyze ozone to remove 100% of benzophenone-4 with an initial concentration of 10 mg L within 15 min, and TOC removal by 52.67%. This paper presents a revised method for preparing an inorganic microfiltration membrane, which is an increasingly promising material for water treatment because of its low cost, low energy consumption, and high catalytic performance.
硅铝酸盐复合材料的特点是成本低、无毒、易于成型。使用硅铝酸盐复合材料制备的膜具有以下缺点：平均孔径大，机械强度低。为了解决这些限制，使用二氧化硅粉末和硅铝酸盐复合材料作为原料制备了平板微滤膜。通过调节二氧化硅的粒径、二氧化硅与硅铝酸盐复合材料的比例（s/a）以及化学外加剂的类型来优化膜性能。X 射线衍射结果表明，结晶二氧化硅颗粒有利于制备具有更高弯曲强度的膜。二氧化硅粒径的减小（1.33-0.15μm）降低了孔径分布。随着 s/a 的增加，膜的弯曲强度降低，而添加溶解的硅酸钠则可以有效地提高膜的弯曲强度。优化后的无机微滤膜还可以在 15 分钟内催化臭氧去除初始浓度为 10mg/L 的 100%二苯甲酮-4，TOC 去除率为 52.67%。本文提出了一种改进的无机微滤膜制备方法，由于其成本低、能耗低、催化性能高，因此是一种很有前途的水处理材料。
