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Filter membrane modifying method based on metallic oxide particles

A technology of oxide particles and manganese oxide particles, which is applied in chemical instruments and methods, membrane technology, water pollutants, etc., can solve the problems of membrane pore blockage, fast flux attenuation, and reduced membrane service life, and achieve good adsorption Good effect and water permeability

Inactive Publication Date: 2018-10-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that existing commonly used organic membranes or inorganic membranes are prone to be adsorbed on the surface of the membrane and in the pores of the membrane during use, resulting in clogging of the pores of the membrane, making the membrane body anti-pollution, fast attenuation of the flux, and reducing the use of the membrane. life and low backwashing efficiency, and provide a membrane modification method based on metal oxide particles

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0014] Specific embodiment one: a kind of filter membrane modification method based on metal oxide particles of the present embodiment is carried out according to the following steps:

[0015] Prepare a solution containing metal oxide particles, then use a filter membrane to filter the solution containing metal oxide particles, and form a covering layer of metal oxide particles with a thickness of 10nm to 1mm on the surface of the filter membrane, that is, complete the filter membrane based on metal oxide particles modification method;

[0016] The metal oxide particles in the solution containing metal oxide particles are iron oxide particles, manganese oxide particles or a mixture of iron oxide particles and manganese oxide particles.

[0017] The beneficial effects of this specific embodiment are: this specific embodiment utilizes a certain method to produce metal oxide particles (iron oxide particles, manganese oxide particles or a mixture of iron oxide particles and mangan...

specific Embodiment approach 2

[0022] Embodiment 2: This embodiment differs from Embodiment 1 in that the solution for preparing particles containing metal oxides is produced by reacting ferrate or permanganate with an aqueous solution containing reducing substances. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the reducing substance in the aqueous solution containing reducing substances is Fe 2+ or Mn 2+ . Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a filter membrane modifying method based on metallic oxide particles, and belongs to the field of the membrane method water treatment. The method aims to solve problems existing in a common organic membrane or an inorganic membrane that an intercepted substance is easily adsorbed on the surface of the membrane and in membrane holes during a using process so that the membrane holes are clogged, a membrane body is polluted, flux attenuation is rapid, the service life of the membrane is reduced, and the back washing efficiency is low. The method comprises the following steps: preparing solution containing the metallic oxide particles, and filtering the solution containing the metallic oxide particles by using a filter membrane, forming a metallic oxide particle covering layer on the surface of the filter membrane, namely completing the filter membrane modifying method based on the metallic oxide particles.

Description

technical field [0001] The invention belongs to the field of membrane water treatment. Background technique [0002] Membrane separation technology has great potential in the field of water treatment, but low membrane flux and serious membrane fouling are the main bottlenecks restricting the development of membrane technology. At present, methods to improve membrane performance include membrane surface modification, pretreatment, physical and chemical cleaning methods, etc., among which membrane modification is the most fundamental method to improve membrane performance. At present, the commonly used organic membranes (PVDF, etc.) or inorganic membranes (ceramic membranes, etc.) have the problem that the intercepted substances are easily adsorbed on the membrane surface and in the membrane pores during use, causing the membrane pores to be blocked, making the membrane body anti-pollution, and the flux attenuation is fast, reducing The service life of the membrane is guarant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00C02F3/34C02F3/12C02F1/28C02F101/20C02F101/30
CPCB01D67/0081C02F1/281C02F3/1268C02F3/34C02F2101/30C02F2101/20Y02W10/10C02F2303/20B01D67/0088B01D69/148B01D71/34B01D71/024B01D71/04C02F1/285C02F1/288
Inventor 马军王鲁刘玉蕾
Owner HARBIN INST OF TECH
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