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Composite resin aerogel in sewage treatment and application thereof

A composite resin and aerogel technology, used in flocculation/sedimentation water/sewage treatment, water/sewage treatment, special compound water treatment, etc., can solve the problems of complex structure, poor desorption and regeneration performance, corrosion, etc. The effect of expanding the photoresponse range, improving the photocatalytic activity, and improving the photocatalytic efficiency

Pending Publication Date: 2021-04-06
张倩茹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the water pollution caused by artificial production activities, the water pollution caused by industry is the most serious, and the development of society is inseparable from industrial production. And the amount is also different, making industrial sewage treatment very difficult
[0003] For some enterprises that require zero discharge of wastewater, the wastewater can only be treated and reused, but the wastewater will contain a large amount of heavy metal ions, and heavy metal pollutants cannot be decomposed into harmless substances by themselves, and can only change in form in the sewage Or transfer between different phases, its toxicity has not been fundamentally eliminated, so to eliminate toxicity, heavy metal ions must be removed from sewage
Airgel has a certain adsorption capacity, but ordinary aerogels have low adsorption capacity, poor desorption and regeneration performance, so the development of a simple preparation, strong adsorption capacity, easy desorption, and recyclable airgel can greatly reduce the cost ,Improve work efficiency
[0004] In addition, industrial sewage often contains a large number of refractory organic substances, which have large molecular weight, high toxicity, complex structural components, long-term residues, and semi-volatility, which can induce carcinogenic, teratogenic, and mutagenic effects. poses a serious hazard
Titanium oxide can catalyze the degradation of organic pollutants, and has high photocatalytic activity, chemical and photochemical corrosion resistance, and non-toxicity. However, titanium oxide is hydrophilic, so that when it is used as a catalyst to catalyze the degradation of some sewage, it will Water-based reasons make it impossible to recycle after the completion of catalysis; in addition, because the photocatalytic performance of titanium dioxide is limited by the separation efficiency of photogenerated electrons and holes, and the pure phase of titanium dioxide due to its high recombination efficiency of photogenerated electrons and holes also leads to Its photocatalytic performance is limited

Method used

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  • Composite resin aerogel in sewage treatment and application thereof
  • Composite resin aerogel in sewage treatment and application thereof
  • Composite resin aerogel in sewage treatment and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of composite resin airgel, its preparation method comprises the following steps:

[0043] 1. Take by weighing 28g glycidyl methacrylate, 13g divinylbenzene and 40g ethylene glycol dimethacrylate at a molar mass ratio of 2:1:2 and dissolve them in 200mL toluene and deionized water mixed solvent (volume ratio 10:1), stir and slowly add 0.8g of azobisisobutyronitrile, gradually raise the temperature to 70°C and keep the reaction for 7 hours, so that free radical polymerization occurs to obtain a polymer, the polymer is cooled to room temperature, concentrated and dried to obtain an organic resin ,spare;

[0044] 2. Dissolve 100g of cellulose in glacial acetic acid for activating treatment for 6 hours, suction filter, wash with deionized water, and dry, weigh 80g of activated cellulose and 20g of organic resin and dissolve in 4L of deionized water, add 3g of N, N-Methylenebisacrylamide and 1.5g of potassium persulfate prepared a solution with a concentration of 0.2g...

Embodiment 2

[0058] A kind of composite resin airgel, its preparation method comprises the following steps:

[0059] 1. Take by weighing 43g glycidyl methacrylate, 26g divinylbenzene and 40g ethylene glycol dimethacrylate at a molar mass ratio of 3:2:2 and dissolve them in 200mL toluene and deionized water mixed solvent (volume ratio 15:1), stir and slowly add 1.6g of azobisisobutyronitrile, gradually raise the temperature to 80°C and keep the reaction for 5 hours, so that free radical polymerization occurs to obtain a polymer, the polymer is cooled to room temperature, concentrated and dried to obtain an organic resin ,spare;

[0060]2. Dissolve 100g of cellulose in glacial acetic acid and activate it for 6 hours, filter it with suction, wash with deionized water, and dry it. Weigh 60g of activated cellulose and 10g of organic resin and dissolve it in 3L of ethanol. Add 2g of N,N -Methylenebisacrylamide and 1.0g of potassium persulfate prepared a solution with a concentration of 0.15g / mL...

Embodiment 3

[0074] A kind of composite resin airgel, its preparation method comprises the following steps:

[0075] 1. Take by weighing 36g glycidyl methacrylate, 20g divinylbenzene and 50g ethylene glycol dimethacrylate at a molar mass ratio of 5:3:5 and dissolve them in 250mL toluene and deionized water mixed solvent (volume ratio 10:1), stir and slowly add 2.4g of azobisisobutyronitrile, gradually raise the temperature to 80°C and keep the reaction for 6 hours, so that free radical polymerization occurs to obtain a polymer, the polymer is cooled to room temperature, concentrated and dried to obtain an organic resin ,spare;

[0076] 2. Dissolve 100g of cellulose in glacial acetic acid for activating treatment for 6 hours, suction filter, wash with deionized water, and dry, weigh 50g of activated cellulose and 20g of organic resin and dissolve in 3L of ethanol, add 1.5g of N, N-Methylenebisacrylamide and 0.75g of potassium persulfate prepared a solution with a concentration of 0.1g / mL, ...

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Abstract

The invention provides a composite resin aerogel, which is obtained by compounding an organic resin prepared from glycidyl methacrylate, divinyl benzene and ethylene glycol dimethacrylate with activated cellulose, then modifying with 3-alpha-furyl acrylic acid, and carrying out circulating freeze drying; or compounding the activated cellulose with organic resin, modifying with 3-alpha-furyl acrylic acid, loading a photocatalyst, and carrying out circulating freeze drying to obtain the product. The invention further provides a specific preparation method of the composite resin aerogel and an application method of the composite resin aerogel in sewage treatment, the process is simple, the effect is excellent, the aerogel is wrapped in the stainless steel grids, so that the contact area between the aerogel and sewage is large enough, the integrity of the aerogel is protected, and the aerogel can be repeatedly used; the composite resin aerogel is high in porosity, large in specific surface area, excellent in shape recovery performance, excellent in heavy metal ion adsorption performance, capable of being resolved and regenerated, capable of being recycled for multiple times and good in application potential.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a composite resin airgel and its application in sewage treatment. Background technique [0002] With the rapid development of social economy, cities, and industries, the amount of various domestic sewage and industrial wastewater has also increased rapidly, resulting in serious water pollution. At the same time, human beings are also facing the problem of water shortage. Therefore, the treatment and reuse of sewage become more and more important. Among the water pollution caused by artificial production activities, the water pollution caused by industry is the most serious, and the development of society is inseparable from industrial production. And the amount is also different, making industrial sewage treatment very difficult. [0003] For some enterprises that require zero discharge of wastewater, the wastewater can only be treated and reused, but t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B01J31/38C02F1/28C02F1/32C02F9/08C02F101/20C02F101/30
CPCB01J20/264B01J20/267B01J20/28047B01J31/38C02F1/32C02F1/285C02F9/00C02F2305/10C02F2101/30C02F2101/20C02F1/001C02F1/66C02F1/52C02F1/444B01J35/23B01J35/39
Inventor 张倩茹
Owner 张倩茹
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