Preparation method of hydrogel filtering membrane for efficiently loading and catalyzing organic pollutants

Abstract

Aiming at the problems of low catalytic efficiency, easy oxidation of zero-valent iron and easy loss of a catalyst in hydrogel caused by finger-shaped pores of a traditional polymeric membrane, the invention provides a preparation method of a hydrogel filtering membrane for efficiently loading and catalyzing organic pollutants. The preparation method comprises the following steps: mixing and dispersing purified halloysite and a ferric chloride aqueous solution, then adding tetraethyl orthosilicate, regulating the pH value to hydrolyze the Tetraethyl orthosilicateto obtain silicon dioxide, then dropwise adding a sodium borohydride solution to generate a halloysite / silicon dioxide dispersion liquid loaded with zero-valent iron, washing with ethanol to remove unreacted substances, and carrying out suction filtration and drying to obtain the zero-valent iron loaded halloysite / silicon dioxide particles; and dispersing the zero-valent iron loaded halloysite / silicon dioxide particles a sodium alginate aqueous solution to obtain a membrane casting solution, scraping the membrane casting solution into a membrane, soaking the membrane in a metal ion aqueous solution, and crosslinking to obtain the hydrogel filtering membrane for efficiently loading and catalyzing the organic pollutants. The membrane has a wide application prospect in the fields of sewage treatment and environmental protection.

Description

technical field [0001] The invention relates to a preparation method of a hydrogel filtration membrane efficiently loaded with catalytic organic pollutants, and belongs to the field of functional materials and membrane separation. [0002] The invention relates to the technical fields of preparation and loading of zero-valent iron, filter membrane, hydrogel and the like. In particular, it relates to a preparation method of a hydrogel filtration membrane for efficiently loading catalytic organic pollutants. Background technique [0003] Water resources are one of the most important material resources indispensable for the survival and development of human beings. However, with the continuous development of industry, water pollution is also becoming more and more serious. Organic waste is a major aspect of water pollution. There are many types of organic pollutants in water, complex components, and most of them are toxic, which has great harm to the environment and human bod...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the existing technology, the technical problem to be solved by the present invention is that the finger-shaped pores of the traditional polymer membrane lead to low catalytic efficiency, zero-valent iron is easily oxidized, and the catalyst in the hydrogel is easy to lose, etc.

[0008] The technical solution of the present invention to solve the problems of low catalytic efficiency caused by the finger-shaped pores of traditional polymer membranes, easy oxidation of zero-valent iron, and easy loss of catalysts in hydrogels is to provide a hydrogel filter with high-efficiency loading of catalytic organic pollutants. Membrane Preparation Method