TiO2-loaded packing and preparation method thereof

A polyurethane sponge and solution technology, applied in the field of water treatment, can solve the problems of difficulty in achieving downstream biodegradation goals, insufficient biodegradability, and increased processing costs, and achieve the effects of abundant raw materials, low cost and good effect.

Active Publication Date: 2013-07-24
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emergence of the combined process has greatly improved the effect of photocatalytic or biochemical treatment alone, but there are still problems. Excessive oxidation will waste oxidant and increase the cost of treatment. Insufficient biodegradability makes it difficult to achieve downstream biodegradation goals.

Method used

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  • TiO2-loaded packing and preparation method thereof
  • TiO2-loaded packing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A loaded TiO 2 The filler, which includes polyurethane sponge block and TiO 2 ,TiO 2 All loads are on the polyurethane sponge block, wherein the polyurethane sponge block has a side length of 4.0mm and a specific surface area of ​​4.8m 2 / g, the porosity is 88%, and the density after immersion is 1.01g / cm 3 .

[0025] The above loaded TiO 2 Filling preparation method:

[0026] Add 23.9 g titanium isopropoxide to 150 mL HNO 3 (0.5mol / L) solution, heated in a water bath at 80°C until the volume of the solution was concentrated to 50mL, and after cooling to room temperature, added an appropriate amount of trimesic acid with a mass percentage of 5% (trimesic acid is a commonly used binder) ; Cover the beaker containing the solution with aluminum foil, and obtain a suspension solution after 18 hours in an oil bath at 130°C, and cool to room temperature; put 10g of polyurethane sponge block into the suspension solution, place it in an oven at 80°C for 5h, and use it eve...

Embodiment 2

[0028] A loaded TiO 2 The filler, which includes polyurethane sponge block and TiO 2 , the TiO 2 Loaded on the polyurethane sponge block, wherein the polyurethane sponge block has a side length of 4.0mm and a specific surface area of ​​4.8m 2 / g, the porosity is 92%, and the density after immersion is 1.01g / cm 3 .

[0029] The above loaded TiO 2 Filling preparation method:

[0030] Add 23.9 g titanium isopropoxide to 150 mL HNO 3 (0.5mol / L) solution, heated in a water bath at 75°C until the volume of the solution was concentrated to 67mL, and after cooling to room temperature, added an appropriate amount of trimesic acid with a mass percentage of 5% (trimesic acid is a commonly used binder) ; Cover the beaker containing the solution with aluminum foil, and obtain a suspension solution after an oil bath at 110°C for 15 hours, and cool to room temperature; put 10g of polyurethane sponge block into the suspension solution, place it in an oven at 70°C for 5h, and use it ever...

Embodiment 3

[0032] A loaded TiO 2 The filler, which includes polyurethane sponge block and TiO 2 , the TiO 2 Loaded on the polyurethane sponge block, wherein the polyurethane sponge block has a side length of 4.0mm and a specific surface area of ​​4.8m 2 / g, the porosity is 95%, and the density after immersion is 1.02g / cm 3 .

[0033] The above loaded TiO 2 Filling preparation method:

[0034] Add 23.9 g titanium isopropoxide to 150 mL HNO 3 (0.5mol / L) solution, heated in a water bath at 85°C until the volume of the solution was concentrated to 75mL, and after cooling to room temperature, added an appropriate amount of trimesic acid with a mass percentage of 5% (trimesic acid is a commonly used binder) ; Cover the beaker containing the solution with aluminum foil, and obtain a suspension solution after 20 hours in an oil bath at 120 ° C, and cool to room temperature; put 10 g of polyurethane sponge into the suspension solution, place it in a 75 ° C oven for 5 hours, and use it every...

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Abstract

The invention discloses a TiO2-loaded packing. The packing comprises polyurethane sponge blocks and TiO2, wherein TiO2 is loaded on the polyurethane sponge blocks. The invention further discloses a preparation method of the packing. The method comprises steps of: soaking the polyurethane sponge blocks into a TiO2-rich solution after being concentrated and treated in oil bath; heating the polyurethane sponge blocks in a drying oven until a suspension liquid is evaporated out and TiO2 is completely loaded on the polyurethane sponge blocks; washing completely with deionized water; and drying to obtain the TiO2-loaded packing. The cost of raw materials of TiO2 is low in cost, and a TiO2 film loaded on the external surface of the polyurethane sponge block is thin and uniform and does not affect the growth of the microorganism in a porous structure in the packing. Experiments prove that the TiO2-loaded packing has high degradation removal rate to active black 5. Photocatalytic degradation and biodegradation are coupled together, so that the packing integrates the advantages of advanced oxidation and biodegradation, and has a good treatment effect on complicated degradation-resistant organic matters, particularly on printing and dyeing wastewater.

Description

technical field [0001] The invention relates to a biological filler, and also relates to a preparation method of the biological filler. Specifically, it uses a biofilm method to treat sewage, and belongs to the technical field of water treatment. Background technique [0002] Biofilm method is a widely used sewage treatment technology at present. Biofiller is one of the cores of this technology. Its material and surface properties will directly affect the attachment and growth of microorganisms, and then affect the sewage treatment effect. The widely used biological fillers are divided into inorganic fillers and organic fillers. Among them, the inorganic fillers are mainly composed of shale, coke, quartz sand, activated carbon, zeolite, clay ceramsite, etc.; the organic fillers are mainly divided into soft fillers, semi-soft fillers Fillers, combined fillers, dispersed fillers, etc. Among the various fillers that have been reported so far, most of them are based on a single...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/10
CPCY02W10/10
Inventor 李轶陈萌萌张文龙王晴王大伟
Owner HOHAI UNIV
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