A preparation method and application of an inorganic modified membrane based on in-situ reduction

An inorganic modification, inorganic membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of inability to remove small molecular organics, secondary pollution, increase costs, etc., and achieve rapid and efficient degradation. , The effect of saving the amount of use and prolonging the time of film use

Active Publication Date: 2022-04-15
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the existing commercial membranes are easy to cause pollution during use, and the cost of removing pollution by cleaning will increase, cause secondary pollution and cannot remove small molecular organics, and provide an inorganic membrane based on in situ reduction. Preparation method and application of modified membrane

Method used

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  • A preparation method and application of an inorganic modified membrane based on in-situ reduction
  • A preparation method and application of an inorganic modified membrane based on in-situ reduction
  • A preparation method and application of an inorganic modified membrane based on in-situ reduction

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specific Embodiment approach 1

[0035] Embodiment 1: This embodiment is a method for preparing an inorganic modified membrane based on in-situ reduction, which is completed in the following steps:

[0036] 1. Preparation of catalyst support layer:

[0037] Adding an organic substance with a loading function to the buffer solution to obtain a loading layer solution;

[0038] The buffer solution described in step 1 is obtained by dissolving the buffer into water, wherein the concentration of the buffer is 0.1mmol / L-25mmol / L;

[0039] The organic matter with loading function described in step 1 is one of trimesic acid, chitin, chitosan, cellulose, glucose, fructose, galactose and glutamic acid or a mixture of several of them;

[0040] 2. Using method 1, method 2 or method 3 to load a loading layer on the surface of the inorganic membrane to obtain an inorganic membrane loaded with a loading layer, and then calcining to obtain a modified inorganic membrane;

[0041] The calcination temperature described in ste...

specific Embodiment approach 2

[0056] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the buffering agent described in step one is a mixture of boric acid and borax, a mixture of citric acid and sodium citrate, a mixture of acetic acid-sodium acetate, diphosphate A mixture of sodium hydrogen-disodium hydrogen phosphate, tris hydrochloride or a mixture of borax and sodium hydroxide. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0057] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the molar ratio of boric acid and borax in the mixture of described boric acid and borax is 1: (1~70); Described citric acid The mol ratio of citric acid and sodium citrate in the mixture of sodium citrate and sodium citrate is (1~20):(1~20); The mol ratio of acetic acid and sodium acetate in the mixture of described acetic acid-sodium acetate is (1~20). 10): (1~20); the molar ratio of sodium dihydrogen phosphate to disodium hydrogen phosphate in the mixture of sodium dihydrogen phosphate-disodium hydrogen phosphate is (1~15):(1~20); The mol ratio of borax and sodium hydroxide in the mixture of borax and sodium hydroxide is (1~5):1. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

A preparation method and application of an inorganic modified membrane based on in-situ reduction, which relates to a preparation method and application of a modified inorganic membrane. The purpose of the present invention is to solve the problems that the existing commercial membranes are easy to cause pollution during use, the cost will be increased by cleaning to remove the pollution, secondary pollution will be caused and small molecular organic matter cannot be removed. Method: 1. Prepare the catalyst loading layer; 2. Load the loading layer on the surface of the inorganic membrane to obtain the inorganic membrane loaded with the loading layer, and then calcinate to obtain the modified inorganic membrane; 3. Prepare the catalyst seed solution; 4. Put the modified inorganic membrane The membrane is dipped into a catalyst seed solution. An inorganic modified membrane based on in-situ reduction is used in combination with an oxidant to treat micro-pollutants in drinking water, to treat pollutants in water after secondary treatment in sewage treatment plants, to treat refractory pollutants in industrial wastewater, to treat Turbidity and algae in lake water and reservoir water. The invention can obtain the inorganic modified membrane based on in-situ reduction.

Description

technical field [0001] The invention relates to a preparation method and application of a modified inorganic membrane. Background technique [0002] The birth of membrane technology has played a vital role in solving the problems of algae pollution and two insects. The membrane has a screening effect. According to the size of the pollutant, the membrane with the appropriate pore size can be selected and the pollutant can be separated from the water body through physical action. Although this method of physical separation is simple and does not introduce new pollutants, it also has significant limitations. First of all, the membrane will cause serious membrane fouling during use. Pollutants much larger than the membrane pore size are deposited on the membrane surface and form a filter cake layer. With the compaction and thickening of the filter cake layer, the membrane flux and pollutant removal The rate will be significantly affected, and this part of the pollution can be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/02B01J23/34B01J23/745B01J23/889C02F1/44C02F1/72
CPCB01D67/0039B01D67/0067B01D69/02C02F1/44C02F1/725B01J23/34B01J23/8892B01J23/745
Inventor 马军张逸萱甄宇菲孙志强刘晴靓
Owner HARBIN INST OF TECH
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