CN120887531B - Environment oil removal treating agent and preparation method thereof - Google Patents
Environment oil removal treating agent and preparation method thereofInfo
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- CN120887531B CN120887531B CN202511041008.7A CN202511041008A CN120887531B CN 120887531 B CN120887531 B CN 120887531B CN 202511041008 A CN202511041008 A CN 202511041008A CN 120887531 B CN120887531 B CN 120887531B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5272—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using specific organic precipitants
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0024—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid beta-D-Glucans; (beta-1,3)-D-Glucans, e.g. paramylon, coriolan, sclerotan, pachyman, callose, scleroglucan, schizophyllan, laminaran, lentinan or curdlan; (beta-1,6)-D-Glucans, e.g. pustulan; (beta-1,4)-D-Glucans; (beta-1,3)(beta-1,4)-D-Glucans, e.g. lichenan; Derivatives thereof
- C08B37/0027—2-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
- C08B37/003—Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
本发明涉及水污染治理技术，尤其是一种环境除油处理剂及其制备方法；制备方法包括壳聚糖亲油改性；长链烷基共修饰得到亲油壳聚糖；亲油壳聚糖按重量比1：0.05‑0.1：1加入光引发剂和炭粉，搅拌均匀得到环境除油处理剂；改性得到亲油壳聚糖，将亲油壳聚糖溶于油水混合物中，而后利用特定光谱的光照促使亲油壳聚糖在油水混合物中交联并捕获油滴，最终形成疏水的凝胶状絮凝物并挤出水分，便于过滤或沉淀油脂。This invention relates to water pollution control technology, and in particular to an environmental oil removal agent and its preparation method. The preparation method includes lipophilic modification of chitosan; co-modification with long-chain alkyl groups to obtain lipophilic chitosan; adding a photoinitiator and carbon powder to the lipophilic chitosan at a weight ratio of 1:0.05-0.1:1 and stirring evenly to obtain the environmental oil removal agent; modifying the obtained lipophilic chitosan, dissolving the lipophilic chitosan in an oil-water mixture, and then using light of a specific spectrum to promote cross-linking of the lipophilic chitosan in the oil-water mixture and capture oil droplets, ultimately forming a hydrophobic gel-like flocculant and squeezing out water, which facilitates filtration or precipitation of oil.
Description
Technical Field
The invention relates to a water pollution treatment technology, in particular to an environment degreasing treating agent and a preparation method thereof.
Background
Organic wastewater has a great influence on the living environment of human beings, and each industry hopes to effectively treat the organic wastewater in an environment-friendly way. For example, chinese patent discloses an environment-friendly sewage treatment agent and a use method and application thereof, and an authorized publication number CN108569754A, wherein the invention discloses the environment-friendly sewage treatment agent and the use method and application thereof, the environment-friendly sewage treatment agent comprises 0.005-0.3% of polysaccharide-metal ion catalyst, 0.1-0.6% of hydrogen peroxide and the balance of aqueous solution with pH value of 1-14, and the polysaccharide-metal ion catalyst comprises polysaccharide and metal ion salt. The treating agent is constructed based on natural polysaccharide, has wide and easily available sources, simple synthesis and low cost, and has good treatment effect under acidic and alkaline conditions.
Hydrogen peroxide is a conventional oxidant used for generating hydroxyl radicals and further treating organic matters in wastewater. The polysaccharide-metal ion catalyst is formed by complexing metal ions with polysaccharide, so that the metal ions can be stably present in the complex while the catalytic capability of the metal ions is not lost.
The prior art has the defects that metal salt is required to be added, and secondary pollution is possibly caused. In particular, the technical proposal records that the metal salt can be chromium salt, etc., and heavy metal pollution is easy to be caused.
Disclosure of Invention
In view of the shortcomings of the prior art, one of the purposes of the present invention is to provide a method for preparing an environmental oil removal treating agent, another purpose of the present invention is to provide the environmental oil removal treating agent, and a third purpose of the present invention is to provide a method for using the environmental oil removal treating agent.
One of the purposes of the invention is achieved by the following technical scheme:
The preparation method of the environmental oil removal treating agent comprises the following steps:
Step one, chitosan is modified in a lipophilic way;
Step two, long-chain alkyl co-modification to obtain oleophylic chitosan;
and thirdly, adding the photoinitiator and the carbon powder into the oleophylic chitosan according to the weight ratio of 1:0.05-0.1:1, and uniformly stirring to obtain the environment degreasing treating agent.
Specifically, the method for modifying the chitosan by oleophilic comprises the following steps:
1) 1g of chitosan was dissolved in 100mL of 1% acetic acid solution (pH about 5.0) and stirred until clear;
2) Dripping Methacrylic Anhydride (MA) with the molar weight 0.5 times of that of chitosan amino, and reacting for 24 hours at 25 ℃ to obtain a reaction solution;
3) Dialyzing the reaction solution for against deionized water for 3 days (filling the reaction solution into a dialysis bag for sealing, immersing the dialysis bag into a large amount of deionized water, driving small molecular impurities to diffuse outwards from the inside of the dialysis bag into water through concentration difference), taking out the reaction solution, and freeze-drying to obtain CSMA white solid.
Further, the dialysis uses a dialysis bag MWCO of 8kDa, i.e.a molecular cut-off of 8kDa.
Specifically, the long-chain alkyl co-modification method comprises the following steps:
1) CSMA white solid was dissolved in 20mL anhydrous Dimethylsulfoxide (DMSO) and 1.5 fold molar amount of Triethylamine (TEA) based on CSMA was added;
2) Dripping 0.25 times mole of stearoyl chloride calculated by chitosan amino, and reacting for 12 hours at 60 ℃ in nitrogen atmosphere;
3) Pouring the reaction solution into cold ethanol for precipitation, centrifuging to collect solid, repeatedly washing for 3 times to remove unreacted reagent, and freeze-drying to obtain the lipophilic chitosan.
Specifically, the carbon powder is replaced by metal salt, and the metal salt is copper sulfate pentahydrate (CuSO4.5H2O) powder. It is known that copper sulfate pentahydrate is stable in nature under the conventional environment and is favorable for preservation. This example is a high catalytic case.
Specifically, the photoinitiator is Irgacure 2959.
Specifically, the stirring mode is 30-60r/min stirring in an environment of 2-5 ℃. Avoiding the deactivation of the photoinitiator caused by high temperature.
The second purpose of the invention is realized by the following technical scheme:
the environmental oil removal treating agent is prepared by adopting the preparation method.
The third object of the invention is achieved by the following technical scheme:
the application method of the environment degreasing treating agent (suitable for treating oily sewage) comprises the following steps:
step one, mixing an environment degreasing treating agent and citric acid according to a weight ratio of 9:1 to obtain a mixture;
Step two, mixing the mixture and sewage to be treated according to a weight ratio of 2:1000, and dispersing to form micron-sized oil drops (for example, dispersing for 2min by adopting an emulsifying machine 10000 r/min) to obtain mixed sewage;
Introducing the mixed sewage into a water tank with the depth of 0.3cm, and irradiating with 365nm UV, wherein the UV irradiation parameters are 50mW/cm 2 for 3-5min;
And step four, filtering or naturally settling to separate flocculate and water.
Another method of using the environmental degreasing treatment (suitable for treating algae-laden sewage) comprises the steps of:
Mixing an environment degreasing treating agent with citric acid according to a weight ratio of 9:1 to obtain a mixture, mixing the mixture with deionized water according to a weight ratio of 1:100, introducing the mixture into a water tank with a depth of 0.3cm, using 365nm UV irradiation with a UV irradiation parameter of 50mW/cm 2 for 3-5min to obtain flocculate, mixing the flocculate with equal weight of 3% hydrogen peroxide, and then adding the flocculate into a algae polluted water body.
The invention has the beneficial effects that the oleophylic chitosan is obtained by modification, the oleophylic chitosan is dissolved in an oil-water mixture, then the oleophylic chitosan is promoted to be crosslinked in the oil-water mixture by utilizing illumination with specific spectrum to capture oil drops, finally hydrophobic gelatinous floccules are formed and water is extruded out, and the filtration or the precipitation of grease are facilitated. In addition, the catalytic mode has unexpected discovery that the catalytic mode still has a certain inhibition effect on algae after the hydrogen peroxide is exhausted.
Detailed Description
Further description of the embodiments follows:
Example 1
Preparing an environment oil removal treating agent:
Step one, chitosan is modified in a lipophilic way;
1) 1g of chitosan is dissolved in 100mL of 1% acetic acid solution and stirred until transparent;
2) Dripping methacrylic anhydride with the molar weight 0.5 times of that of chitosan amino, and reacting for 24 hours at 25 ℃ to obtain a reaction solution;
3) Dialyzing the reaction solution (MWCO is 8 kDa) with against deionized water for 3 days, taking out the reaction solution, and freeze-drying to obtain CSMA white solid.
Step two, long-chain alkyl co-modification to obtain oleophylic chitosan;
1) Taking CSMA white solid, dissolving the CSMA white solid in 20mL of anhydrous dimethyl sulfoxide, and adding triethylamine with the molar quantity 1.5 times that of CSMA;
2) Dripping 0.25 times mole of stearoyl chloride calculated by chitosan amino, and reacting for 12 hours at 60 ℃ in nitrogen atmosphere;
3) Pouring the reaction solution into cold ethanol for precipitation, centrifuging to collect solids, repeatedly washing for 3 times to remove unreacted reagents, and freeze-drying to obtain powder to obtain oleophylic chitosan;
adding Irgacure 2959 and carbon powder (the carbon powder is obtained by carbonizing and crushing chaff and sieving the crushed chaff with a 100-mesh sieve, and the same applies below) into the oleophylic chitosan according to the weight ratio of 1:0.05:1, and uniformly stirring the mixture at the temperature of 2 ℃ for 30r/min to obtain the environment degreasing treating agent.
Example 2
Preparing an environment oil removal treating agent:
Step one, chitosan is modified in a lipophilic way;
1) 1g of chitosan is dissolved in 100mL of 1% acetic acid solution and stirred until transparent;
2) Dripping methacrylic anhydride with the molar weight 0.5 times of that of chitosan amino, and reacting for 24 hours at 25 ℃ to obtain a reaction solution;
3) Dialyzing the reaction solution (MWCO is 8 kDa) with against deionized water for 3 days, taking out the reaction solution, and freeze-drying to obtain CSMA white solid.
Step two, long-chain alkyl co-modification to obtain oleophylic chitosan;
1) Taking CSMA white solid, dissolving the CSMA white solid in 20mL of anhydrous dimethyl sulfoxide, and adding triethylamine with the molar quantity 1.5 times that of CSMA;
2) Dripping 0.25 times mole of stearoyl chloride calculated by chitosan amino, and reacting for 12 hours at 60 ℃ in nitrogen atmosphere;
3) Pouring the reaction solution into cold ethanol for precipitation, centrifuging to collect solids, repeatedly washing for 3 times to remove unreacted reagents, and freeze-drying to obtain powder to obtain oleophylic chitosan;
and thirdly, adding Irgacure 2959 and carbon powder into the lipophilic chitosan according to the weight ratio of 1:0.08:1, and uniformly stirring at 60r/min in a5 ℃ environment to obtain the environment degreasing treating agent.
Example 3
Preparing an environment oil removal treating agent:
Step one, chitosan is modified in a lipophilic way;
1) 1g of chitosan is dissolved in 100mL of 1% acetic acid solution and stirred until transparent;
2) Dripping methacrylic anhydride with the molar weight 0.5 times of that of chitosan amino, and reacting for 24 hours at 25 ℃ to obtain a reaction solution;
3) Dialyzing the reaction solution (MWCO is 8 kDa) with against deionized water for 3 days, taking out the reaction solution, and freeze-drying to obtain CSMA white solid.
Step two, long-chain alkyl co-modification to obtain oleophylic chitosan;
1) Taking CSMA white solid, dissolving the CSMA white solid in 20mL of anhydrous dimethyl sulfoxide, and adding triethylamine with the molar quantity 1.5 times that of CSMA;
2) Dripping 0.25 times mole of stearoyl chloride calculated by chitosan amino, and reacting for 12 hours at 60 ℃ in nitrogen atmosphere;
3) Pouring the reaction solution into cold ethanol for precipitation, centrifuging to collect solids, repeatedly washing for 3 times to remove unreacted reagents, and freeze-drying to obtain powder to obtain oleophylic chitosan;
adding Irgacure 2959 and carbon powder into the lipophilic chitosan according to the weight ratio of 1:0.07:1, and uniformly stirring at the temperature of 3 ℃ at 40r/min to obtain the environment degreasing treating agent.
Example 4
And step three, adding Irgacure 2959 and copper sulfate pentahydrate (CuSO4.5H2O) powder into the lipophilic chitosan according to the weight ratio of 1:0.07:1, and uniformly stirring at the temperature of 3 ℃ for 40r/min to obtain the environment degreasing treating agent. The remaining steps were the same as in example 3.
Example 5
Step one, mixing the environmental degreasing treating agent obtained in the example 3 with citric acid according to a weight ratio of 9:1 to obtain a mixture;
step two, mixing the mixture with sewage to be treated (soybean oil suspension, oil content of 1000mg/L, oil content of sewage in the simulated catering industry) according to a weight ratio of 2:1000, and dispersing to form micron-sized oil drops (dispersing for 2min by adopting an emulsifying machine 10000 r/min) to obtain mixed sewage;
Introducing the mixed sewage into a water tank with the depth of 0.3cm and irradiating with 365nm UV, wherein the UV irradiation parameters are 50mW/cm 2 for 3min;
step four, filtering and separating flocculate and water, and determining the oil content (the determination method is HJ 637-2018) in the water to be 114mg/L. Although the technical effect is insufficient to enable the oil content of kitchen waste water to be reduced to the degree of safe discharge, the oil content is greatly reduced and approaches to the first-level standard (100 mg/L), so the technical scheme has practical significance.
Example 6
Mixing 2mg of the environmental degreasing agent obtained in example 3 with citric acid at a weight ratio of 9:1 to obtain a mixture, mixing the mixture with deionized water at a weight ratio of 1:100, introducing into a water tank with a depth of 0.3cm, and irradiating with 365nm UV with a UV irradiation parameter of 50mW/cm 2 for 3min to obtain flocculate
The flocculate (directly used after filtration without drying) was mixed with 3% hydrogen peroxide, 50mL of a green algae culture solution (simulated eutrophic green algae contaminated water body, wherein the culture solution is a culture solution of "aquatic No. four"), the green algae was added and cultured until the chlorophyll alpha concentration was 30. Mu.g/L), and after 12 hours, the chlorophyll alpha concentration of the green algae culture solution was measured, and the measurement method was HJ 897-2017 (the same applies below), the chlorophyll alpha concentration was 9. Mu.g/L. The invention can be seen that the catalyst has strong catalytic decomposition capability without using metal salt catalyst. It is also presumed that the environmental degreasing agent of the present invention can be used in the occasion of mixed pollution of oil stains and algae, wherein the environmental degreasing agent is used to capture the oil and generate flocculate, and then the flocculate is used to catalyze hydrogen peroxide to decompose algae.
Example 7
The environmental degreasing treatment was derived from example 4, with the remainder of the procedure being referred to in example 6.
After 6 hours, the chlorophyll alpha concentration of the green algae culture solution is determined to be 7 mug/L. The experimental data with the addition of the metal salt and the comparative example 6 without the addition of the metal salt have no substantial difference in the efficacy of decomposing algae, and can treat the eutrophicated algae wastewater to a safe range (< 10 μg/L), further verifying that the present invention has an effect close to the prior art even without the addition of the metal salt. However, it should be noted that the decomposition time was 12 hours without metal salt, whereas the decomposition efficiency of example 7 containing metal salt was significantly improved.
Comparative example 1
Mixing the flocculate obtained in the example 6 with 3% hydrogen peroxide with equal weight, taking 50mL, standing for 1h, adding 5g cysteine, standing for 1h, and finally adding 450mL of chlorella culture solution, wherein the chlorophyll alpha concentration of the chlorella culture solution is 10 mug/L before the experiment. Chlorophyll alpha concentration was determined after 24h incubation at 30 ℃. The concentration was 12. Mu.g/L.
Comparative example 2
The flocs obtained in example 5 and 450mL of green algae culture solution with chlorophyll alpha concentration of 10 mug/L before the experiment are sequentially added after 5g of cysteine is added with 3% hydrogen peroxide with the same weight as the flocs obtained in example 6 and is kept stand for 1 h. Chlorophyll alpha concentration was determined after 24h incubation at 30 ℃. The concentration was 20. Mu.g/L.
The known cysteine can react with hydrogen peroxide rapidly, so that hydrogen peroxide is consumed, and the cysteine has no toxic effect on green algae, however, in the case of the comparative example 1, the proliferation rate of green algae is still far less than that of the comparative example 2 in the case of the hydrogen peroxide being consumed. Since the compositions and ratios of the treatments in comparative examples 1 and 2 were the same, except that the order of the treatments was different, it was estimated that the flocs and hydrogen peroxide produced products that could inhibit the proliferation of green algae.
Description of sources of raw materials in examples and comparative examples:
the carbon powder is self-made, and the rest reagents and raw materials are purchased in a conventional way in the market, wherein the deacetylation degree of chitosan is more than or equal to 90 percent, and the molecular weight is 50kDa.
The foregoing embodiments and description have been provided merely to illustrate the principles and best modes of carrying out the invention, and various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. The preparation method of the environmental oil removal treating agent is characterized by comprising the following steps of:
Step one, chitosan is modified in a lipophilic way;
Step two, long-chain alkyl co-modification to obtain oleophylic chitosan;
Step three, adding a photoinitiator and carbon powder into the oleophylic chitosan according to the weight ratio of 1:0.05-0.1:1, and uniformly stirring to obtain an environment degreasing treating agent;
the lipophilic modification method of the chitosan comprises the following steps:
1) 1g of chitosan is dissolved in 100mL of 1% acetic acid solution and stirred until transparent;
2) Dripping methacrylic anhydride with the molar weight 0.5 times of that of chitosan amino, and reacting for 24 hours at 25 ℃ to obtain a reaction solution;
3) Filling the reaction solution into a dialysis bag, sealing, immersing the dialysis bag in a large amount of deionized water for 3 days, driving small molecular impurities to diffuse outwards from the inside of the dialysis bag into water through concentration difference, taking out the reaction solution, and freeze-drying to obtain CSMA white solid, wherein MWCO of the dialysis bag used for dialysis is 8 kDa;
the long-chain alkyl co-modification method comprises the following steps:
1) Taking CSMA white solid, dissolving the CSMA white solid in 20mL of anhydrous dimethyl sulfoxide, and adding triethylamine with the molar quantity 1.5 times that of CSMA;
2) Dripping 0.25 times mole of stearoyl chloride calculated by chitosan amino, and reacting for 12 hours at 60 ℃ in nitrogen atmosphere;
3) Pouring the reaction solution into cold ethanol for precipitation, centrifuging to collect solid, repeatedly washing for 3 times to remove unreacted reagent, and freeze-drying to obtain the lipophilic chitosan.
2. The method of preparing an environmental degreasing treatment according to claim 1, wherein the carbon powder is replaced with a metal salt, and the metal salt is copper sulfate pentahydrate powder.
3. The method of preparing an environmental degreasing treatment of claim 1, wherein the photoinitiator is Irgacure 2959.
4. The method for preparing the environmental degreasing treating agent according to claim 1, wherein the stirring means is stirring at 30-60r/min in an environment of 2-5 ℃.
5. An environmental degreasing treatment obtained by the process for producing an environmental degreasing treatment as claimed in claim 1.
6. A method of treating oily wastewater, comprising the steps of:
Step one, mixing the environmental degreasing treating agent according to claim 5 with citric acid according to a weight ratio of 9:1 to obtain a mixture;
step two, mixing the mixture and sewage to be treated according to a weight ratio of 2:1000, and then dispersing to form micron-sized oil drops to obtain mixed sewage;
introducing the mixed sewage into a water tank with the depth of 0.3cm, and irradiating by using 365 nm UV, wherein the UV irradiation parameters are 50 mW/cm < 2 >, and 3-5min;
And step four, filtering or naturally settling to separate flocculate and water.
7. A method for treating algae-laden wastewater, comprising the steps of:
Mixing the environmental degreasing treating agent according to claim 5 with citric acid according to a weight ratio of 9:1 to obtain a mixture, mixing the mixture with deionized water according to a weight ratio of 1:100, introducing the mixture into a water tank with a depth of 0.3cm, irradiating the mixture with 365 nm UV min, obtaining flocculates with UV irradiation parameters of 50 mW/cm < 2 >, mixing the flocculates with equal weight of 3% concentration hydrogen peroxide, and then adding the flocculates into algae polluted water.
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| JP3018277B2 (en) * | 1996-04-02 | 2000-03-13 | 富士紡績株式会社 | Transfer method of ester |
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| CN104725579A (en) * | 2013-03-14 | 2015-06-24 | 北京化工大学常州先进材料研究院 | Low temperature photopolymerization method for preparing chitosan hydrogel |
| CN109718726B (en) * | 2018-12-29 | 2021-08-03 | 江苏脒诺甫纳米材料有限公司 | Production process of amphiphilic silica-chitosan composite aerogel |
| CN111909395B (en) * | 2020-06-22 | 2022-11-29 | 北京大学深圳医院 | Preparation method of injectable anti-cracking degradable supramolecular hydrogel |
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