阳离子表面活性剂改性沸石分子筛吸附磷研究进展

Research Progress of Phosphorus Adsorption on Cationic Surfactant Modified Zeolites

除磷是目前防止城镇污水污染的重要举措,吸附除磷是有效除磷及磷回收的重要方法。其中,沸石是一个具有多孔结构、较大的比表面积的硅铝酸盐矿物,在水处理过程广泛应用。研究论述了改性沸石,即有机改性沸石在吸附磷酸盐研究中的重要进展。结果表明,由于沸石中含有大量的硅氧和铝氧化合物,使得铝原子结合水分子而使得沸石带负电荷,而阳离子表面活性剂是带有正电荷的有机物,通过静电吸引,阳离子表面活性剂在沸石的表面通过结合力使表面活性剂牢固的负载在沸石表面,使沸石表面带正电荷,可实现污水除磷。此外,总结了沸石的基本性质、阳离子表面活性剂的负载、吸附作用、吸附机理以及吸附过程等因素对除磷的作用。研究发现了用表面活性剂改性沸石实现磷高效吸附方法,为构建高效处理吸附材料指出了新方向与材料。

Phosphorus removal is an important measure to prevent urban sewage pollution.Adsorption is an important method for effective phosphorus removal and recovery.Zeolite is a kind of aluminosilicate mineral with porous structure and large specific surface area,which is widely used in water treatment process.The important progress of modified zeolites,i.e.,organic modified zeolites,in the adsorption of phosphate was reviewed.The results show that due to a lot of silica and alumina compounds in zeolite,aluminum atoms combine with water molecules and make zeolite negatively charged,while cationic surfactant is an organic matter with positive charge.Through electrostatic attraction,cationic surfactant is firmly loaded on the surface of zeolite by binding force,which makes zeolite positively charged,leading to remove phosphorus from wastewater efficiently.This paper also describes the basic properties of zeolite,the loading of cationic surfactant,adsorption,adsorption mechanism and the influencing factors of adsorption process.It is found that the high efficient adsorption method of phosphorus can be realized by modifying zeolite with surfactant,this work also points out a new direction and material for the construction of high efficient adsorption materials.