Preparation method and application method of high niobium-titanium-aluminum based porous composite filter membrane

Abstract

The invention discloses a preparation method and an application method of a high niobium-titanium-aluminum based porous composite filter membrane and belongs to the field of water pollution control. According to the preparation method and the application method, by controlling a sintering temperature of a blended powder of titanium, aluminum, niobium and a nanometer oxide, the chemical reaction iscontrolled, and thus controllable equipment a series of composite membranes is realized; as for the composite membranes, as multiple nanometer pore canals and bulges are constructed on the surface ofan original matrix, and when a certain external pressure is applied to the original matrix, the nanometer pore canals and the bulges greatly hinder nanometer pollutants from passing through the composite membranes, and water molecules can penetrate through the composite membranes through deformation; and the high niobium-titanium-aluminum based porous composite filter membrane can remarkably improve the treatment efficiency of the nanometer pollutants and is hopeful to be widely applied to the field of sewage treatment. According to the technical scheme of the invention, the high niobium-titanium-aluminum based porous composite filter membrane is novel and reasonable in design, good in repeatability and very wide in application range of the nanometer pollutants which can be treated.

Description

technical field [0001] The invention belongs to the field of water pollution prevention and control, and in particular relates to a preparation and application method of a high-niobium-titanium-aluminum-based porous composite filter membrane. Background technique [0002] Nanopollutants are a general term for harmful substances produced during the manufacture or use of nanomaterials. Usually we refer to materials with a particle size between 0.1 and 100 nm as nanomaterials, which is roughly equivalent to the scale where 10 to 100 atoms are closely arranged together. Due to the five unique properties of nanoparticles, such as small size effect, surface effect, quantum size effect, macroscopic quantum tunneling effect, and dielectric confinement effect, the properties of nanomaterials in terms of melting point, vapor pressure, optical properties, chemical reactivity, magnetism, Nanotechnology is called the most promising technology in the 21st century because of its unique ph...

AI Technical Summary

Problems solved by technology

Although the function of the product has been greatly improved after modification with nanomaterials, these nanomaterials modified with various functional groups will be directly exposed to air, water and soil in large quantities after use, thus entering the biological chain and finally entering the human body , destroy human organs and cause human death

[0003] However, since nano-pollution is a newly proposed new concept, its risk to environmental safety has not yet attracted great attention from all walks of life.

At present, the combination of physical sedimentation and chemical flocculation sedimentation is mainly used to remove nano-pollutants in water, but the efficiency is low, and a large amount of chemical reagents are required, and the application cost is too high

In addition, at present, nano-pollution is not yet used as a pollutant discharge indicator, so whether the discharged treated water contains nano-materials is not taken seriously.

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