CN109133295A - Sanitary sewage disposal composite flocculation agent based on red mud and preparation method thereof - Google Patents
Sanitary sewage disposal composite flocculation agent based on red mud and preparation method thereof Download PDFInfo
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- CN109133295A CN109133295A CN201811310081.XA CN201811310081A CN109133295A CN 109133295 A CN109133295 A CN 109133295A CN 201811310081 A CN201811310081 A CN 201811310081A CN 109133295 A CN109133295 A CN 109133295A
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- red mud
- flocculation agent
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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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention belongs to technical field of sewage, and in particular to a kind of sanitary sewage disposal composite flocculation agent and preparation method thereof based on red mud；The preparation method includes: that (1) Waste Sulfuric Acid is added into red mud, is stirred, filters after standing, much filtrate is dried, and grinding refinement obtains red mud powder；(2) coal dust is added into red mud powder, carries out high-temperature roasting after mixing, obtains activation red mud powder；(3) aluminium-magnesium silicate is added into activation red mud powder, the ethanol solution of ethylene glycol diglycidylether is sprayed into during being stirred, after being uniformly mixed, be put into vacuum oven and dry to constant weight to get the composite flocculation agent；The present invention is neutralized it and is activated using red mud as starting material, improves the activity of red mud；And it being carried out with aluminium-magnesium silicate compound, the composite flocculation agent being prepared is capable of the processing difficulty of reduction sanitary sewage effectively, improves the treatment effeciency of sanitary sewage.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of based on the compound wadding of the sanitary sewage disposal of red mud
Solidifying agent and preparation method thereof.
Background technique
Sanitary sewage is the waste water being discharged in resident's daily life, is mainly derived from residential architecture and public building, is such as lived
Between residence, organ, school, hospital, shop, public place and industry hygiene etc..Pollutant contained in sanitary sewage is main
It is organic matter (such as protein, carbohydrate, fat, urea, ammonia nitrogen) and a large amount of pathogenic microorganisms (such as parasitic ovum and intestines
Road transmission virus etc.).The organic matter being present in sanitary sewage is extremely unstable, is easy corruption and generates stench.Bacterium and cause of disease
Body using organic matter in sanitary sewage as nutrition mass propagation, can lead to infectious disease from spreading prevalence.Therefore, before sanitary sewage discharge
It must be handled.
In the treatment process of sanitary sewage, in order to remove or reduce the turbidity or suspended matter in water, it is made to generate big
The condensate of grain accelerates the sinking speed of the impurity and sludge in sewage, is typically employed in sewage and flocculant is added.It is general next
It says, flocculant includes inorganic flocculating agent and organic flocculant two major classes.Inorganic flocculating agent is mainly by aluminium salt and two kinds of molysite, such as sulphur
Sour aluminium, polyoxygenated aluminium, iron chloride and ferrous sulfate etc.；Organic flocculant can be divided into anionic, cationic by its charging property
It is mainly (cationic by Sodium Polyacrylate, carboxymethyl cellulose (anionic), polyvinyl with non-ionic three classes
Type), polyethylene oxide, polyacrylamide (non-ionic) etc..
Flocculant it is various in style, be to cheap reality from single type to compound, total trend from low molecule to macromolecule
Developed with the direction of, non-toxic efficient.Inorganic flocculating agent is cheap, but can generate unfavorable shadow to human health and ecological environment
It rings；Although organic polymer coargulator dosage is few, dross yield is few, and flocculation ability is strong, and wadding body can be easily separated, oil removing and except suspend
Object effect is good, but the residual monomer of this kind of high polymer has " three cause " effect (causing rugged, carcinogenic, mutagenesis), thus makes its application
Range is restricted.
Summary of the invention
The preparation method of the purpose of the present invention is to provide a kind of sanitary sewage disposal composite flocculation agent based on red mud,
The composite flocculation agent for handling sanitary sewage is prepared using red mud, reduces the processing difficulty of sanitary sewage, is improved dirty to life
The treatment effeciency of water.
To achieve the goals above, the present invention is achieved by the following scheme:
A kind of preparation method of the sanitary sewage disposal composite flocculation agent based on red mud, comprising the following steps:
(1) Waste Sulfuric Acid is added into red mud, is stirred, is filtered after standing 30~60min, much filtrate is dried, grinds
Refinement obtains the red mud powder that granularity is 90~100 mesh, spare；
(2) coal dust is added into red mud powder, carries out high-temperature roasting after mixing, obtains activation red mud powder；
(3) aluminium-magnesium silicate is added into activation red mud powder, ethylene glycol diglycidyl is sprayed into during being stirred
The ethanol solution of ether after being uniformly mixed, is put into vacuum oven and dries to constant weight to get the composite flocculation agent.
In further technical solution, in step (1), the additional amount of the Waste Sulfuric Acid is to be stirred upper layer after standing
Waste liquid pH value is subject to 6.0~7.0.
In further technical solution, in step (2), the weight ratio of the red mud powder and coal dust be 1:(0.3~
0.5)。
The condition of the high-temperature roasting includes that maturing temperature is 450~600 DEG C, and pressure is -150~0MPa in roaster.
In further technical solution, in step (3), red mud powder, aluminium-magnesium silicate, ethylene glycol diglycidyl are activated
Ether, ethyl alcohol weight ratio be 1:(0.2~0.5): (0.05~0.2): (0.3~0.8).
In further technical solution, in step (3), vacuum drying condition includes in the vacuum oven, temperature
Degree is 50~70 DEG C, and vacuum degree is 0.15~0.5MPa.
The present invention also provides a kind of sanitary sewage disposal use based on red mud being prepared using above-mentioned preparation method
Composite flocculation agent.
Compared with prior art, the present invention has following technical effect that
1, the present invention in, using existing waste red mud as starting material, it is neutralized and activation at
Reason, improves the activity of red mud, enriches the pore structure of red mud；And it is compound with aluminium-magnesium silicate progress, it is prepared
Composite flocculation agent can show preferable flocculating effect in low dosage, thus the processing of reduction sanitary sewage effectively
Difficulty improves the treatment effeciency of sanitary sewage；
2, the preparation method of the sanitary sewage disposal composite flocculation agent provided by the invention based on red mud, by by red mud
It is used with the Waste Sulfuric Acid produced in industrial production, avoids the accumulation of red mud for the destruction of ecological environment and traditional
The high problem of Waste Sulfuric Acid processing difficulty.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is furture elucidated.
All raw materials in the present invention, are not particularly limited its source, buying on the market or according to this field skill
The preparation of conventional method known to art personnel.
All raw materials in the present invention, are not particularly limited its purity, and present invention preferably employs analyze pure or composite wood
The conventional purity that material field uses.
The preparation method of the present invention provides a kind of sanitary sewage disposal composite flocculation agent based on red mud, including it is following
Step:
(1) Waste Sulfuric Acid is added into red mud, is stirred, is filtered after standing 30~60min, much filtrate is dried, grinds
Refinement obtains the red mud powder that granularity is 90~100 mesh, spare；
(2) coal dust is added into red mud powder, carries out high-temperature roasting after mixing, obtains activation red mud powder；
(3) aluminium-magnesium silicate is added into activation red mud powder, ethylene glycol diglycidyl is sprayed into during being stirred
The ethanol solution of ether after being uniformly mixed, is put into vacuum oven and dries to constant weight to get the composite flocculation agent.
Heretofore described red mud is that aluminium industry extracts the pollution waste residue being discharged when aluminium oxide, the every life of average
1 ton of aluminium oxide is produced, can incidentally generate 1~2 ton of red mud, therefore the yield of red mud is very big.But red mud in the prior art is comprehensive
It is lower to close utilization rate.For this purpose, using red mud as raw material, preparing the composite flocculation agent for handling sanitary sewage in the present invention.
The Waste Sulfuric Acid is generated in industrial production, the Waste Sulfuric Acid as caused by resin industry, the Waste Sulfuric Acid it is dense
Degree, since it contains plurality of impurities, is difficult to be recycled by other industry 70% or so, and since itself is acid higher,
It is dangerous material again, processing is more troublesome all the time.In the present invention, Waste Sulfuric Acid is added in red mud, can not only be neutralized red
Overbased material in mud, is also used as Oxidant, which generates a large amount of oxygen-containing in red mud powder
Group, the oxygen-containing group are deviate from different forms in the roasting process of red mud powder, further enrich the hole of red mud
Gap structure.
In the present invention, by the way that aluminium-magnesium silicate is added into the red mud powder after activation, in the second of ethylene glycol diglycidylether
In alcoholic solution, the two is mutually nested to link together, and obtains the composite flocculation agent with stronger flocculating effect.The composite flocculation agent
For in sewage suspended matter and harmful substance have excellent flocculation sedimentation effect, the difficulty of sewage treatment can be effectively reduced
Degree, improves the efficiency of sewage treatment.
According to the present invention, in the present invention, in the step (1), the additional amount of the Waste Sulfuric Acid is stood with being stirred
Waste liquid pH value in upper layer is subject to 6.0~7.0 afterwards.
According to the present invention, in the present invention, in step (2), the weight ratio of the red mud powder and coal dust be 1:(0.3~
0.5).By mixing coal dust into red mud powder, the roasting efficiency of red mud powder is improved, harmful substance in red mud powder is reduced
Content prevents from causing sewage secondary pollution, and the dosage of coal dust is unsuitable very few, and the roasting of red mud powder is easy to cause not fill when very few
Point；And the dosage of coal dust is also unsuitable excessive, otherwise sexual valence is relatively low.
The condition of the high-temperature roasting includes that maturing temperature is 450~600 DEG C, and pressure is in roaster
- 150~0MPa.
According to the present invention, in the present invention, the activation red mud powder, aluminium-magnesium silicate, ethylene glycol diglycidylether, ethyl alcohol
Dosage can select in a wider scope, in order to ensure the composite flocculation agent being prepared is imitated with preferable flocculation sedimentation
Fruit, in step (3), activation red mud powder, aluminium-magnesium silicate, ethylene glycol diglycidylether, ethyl alcohol weight ratio be 1:(0.2~
0.5): (0.05~0.2): (0.3~0.8).
Further, in the present invention, the modified processing of the aluminium-magnesium silicate, specifically, titanium is added into aluminium-magnesium silicate
Acid esters coupling agent, is warming up to 110~130 DEG C and insulated and stirred handles 30~40min, and hydrolysis of polymaleic anhydride and N- is then added
Hydroxyethyl acrylamide continues 1~3h of insulated and stirred, stands and filter residue is washed to filtrate pH by cooled to room temperature, filtering
It is 6.5~7.0, then dries at 50~60 DEG C to constant weight, obtain the aluminium-magnesium silicate of modification；At above-mentioned modification
Reason introduces hydrolysis of polymaleic anhydride and N- hydroxyethyl acrylamide on the surface of aluminium-magnesium silicate, passes through the formation of surface polymer
Enhance aluminium-magnesium silicate to the flocculating effect of suspended matter in sewage；Then by the aluminium-magnesium silicate and activation red mud powder Jing Guo modification
It is mixed, obtained composite flocculation agent can show preferable flocculating effect in low dosage, so that it is dirty to improve life
The flocculation sedimentation efficiency of suspended matter in water reduces difficulty for subsequent sewage treatment process；
Further, in the modification of the aluminium-magnesium silicate, aluminium-magnesium silicate, titanate coupling agent, hydrolyzed polymaleic anhydride
The weight ratio of acid anhydride and N- hydroxyethyl acrylamide is (5~15): (0.1~1.3): (3~7):
(5~10).
Composite flocculation agent obtained in the present invention has stronger stability and higher structural strength, in returning for sediment
In receipts processing, the recycling of composite flocculation agent can be carried out by way of vacuum calcining.
According to the present invention, in the present invention, in step (3), vacuum drying condition includes temperature in the vacuum oven
It is 50~70 DEG C, vacuum degree is 0.15~0.5MPa.
The present invention also provides it is a kind of using above-mentioned preparation method be prepared based on the sanitary sewage of red mud with compound
Flocculant.
Below by way of specific embodiment to the system of the sanitary sewage composite flocculation agent provided by the invention based on red mud
Preparation Method makes further instructions.
Embodiment 1
A kind of preparation method of composite flocculation agent, comprising the following steps:
(1) Waste Sulfuric Acid is added into red mud, is stirred, is filtered after standing 40min, much filtrate is dried, grinding refinement
The red mud powder that granularity is 90 mesh is obtained, it is spare；
Wherein, the additional amount of the Waste Sulfuric Acid be subject to be stirred standing after supernatant liquor pH value be 6.0~7.0；
(2) it is added coal dust into red mud powder, the weight ratio of the red mud powder and coal dust is 1:0.4；
It is after mixing 500 DEG C in temperature, pressure carries out high-temperature roasting under conditions of being -100MPa in roaster, roasts
Rear carry out natural cooling is burnt down into, activation red mud powder is obtained；
(3) aluminium-magnesium silicate is added into activation red mud powder, ethylene glycol diglycidyl is sprayed into during being stirred
The ethanol solution of ether after being uniformly mixed, is put into vacuum oven, is 60 DEG C in temperature, vacuum degree is the item of 0.4MPa
It dries to constant weight under part to get the composite flocculation agent；
Wherein, it is described activation red mud powder, aluminium-magnesium silicate, ethylene glycol diglycidylether, ethyl alcohol weight ratio be 1:0.3:
0.1:0.5.
Embodiment 2
Such as the preparation method of the composite flocculation agent provided in embodiment 1, unlike, in step (3), the activation red mud
Powder, aluminium-magnesium silicate, ethylene glycol diglycidylether, ethyl alcohol weight ratio be 1:0.2:0.05:0.3；
Remaining is constant, and composite flocculation agent is prepared according to the preparation method of embodiment 1.
Embodiment 3
Such as the preparation method of the composite flocculation agent provided in embodiment 1, unlike, in step (3), the activation red mud
Powder, aluminium-magnesium silicate, ethylene glycol diglycidylether, ethyl alcohol weight ratio be 1:0.5:0.2:0.8；
Remaining is constant, and composite flocculation agent is prepared according to the preparation method of embodiment 1.
Embodiment 4
Such as the preparation method of the composite flocculation agent provided in embodiment 1, unlike, in step (2), the red mud powder
Weight ratio with coal dust is 1:0.3；
Remaining is constant, and composite flocculation agent is prepared according to the preparation method of embodiment 1.
Embodiment 5
Such as the preparation method of the composite flocculation agent provided in embodiment 1, unlike, in step (2), the red mud powder
Weight ratio with coal dust is 1:0.5；
Remaining is constant, and composite flocculation agent is prepared according to the preparation method of embodiment 1.
Embodiment 6
Such as the preparation method of the composite flocculation agent provided in embodiment 1, unlike, in step (3), the magnesium silicate
The modified processing of aluminium is warming up to 120 DEG C and insulated and stirred processing specifically, titanate coupling agent is added into aluminium-magnesium silicate
Then hydrolysis of polymaleic anhydride and N- hydroxyethyl acrylamide is added in 40min, continue insulated and stirred 2h, stands simultaneously natural cooling
To room temperature, filtering, it is 7.0 that filter residue, which is washed to filtrate pH, then dries at 60 DEG C to constant weight, obtains the silicic acid of modification
Magnalium；Wherein, the aluminium-magnesium silicate, titanate coupling agent, hydrolysis of polymaleic anhydride and N- hydroxyethyl acrylamide weight ratio
For 10:1:5:7；
Remaining is constant, and composite flocculation agent is prepared according to the preparation method of embodiment 1.
Embodiment 7
Such as the preparation method of the composite flocculation agent provided in embodiment 1, unlike, in step (3), the magnesium silicate
The modified processing of aluminium is warming up to 120 DEG C and insulated and stirred processing specifically, titanate coupling agent is added into aluminium-magnesium silicate
Then hydrolysis of polymaleic anhydride and N- hydroxyethyl acrylamide is added in 40min, continue insulated and stirred 2h, stands simultaneously natural cooling
To room temperature, filtering, it is 7.0 that filter residue, which is washed to filtrate pH, then dries at 60 DEG C to constant weight, obtains the silicic acid of modification
Magnalium；Wherein, the aluminium-magnesium silicate, titanate coupling agent, hydrolysis of polymaleic anhydride and N- hydroxyethyl acrylamide weight ratio
For 5:0.1:3:5；
Remaining is constant, and composite flocculation agent is prepared according to the preparation method of embodiment 1.
Embodiment 8
Such as the preparation method of the composite flocculation agent provided in embodiment 1, unlike, in step (3), the magnesium silicate
The modified processing of aluminium is warming up to 120 DEG C and insulated and stirred processing specifically, titanate coupling agent is added into aluminium-magnesium silicate
Then hydrolysis of polymaleic anhydride and N- hydroxyethyl acrylamide is added in 40min, continue insulated and stirred 2h, stands simultaneously natural cooling
To room temperature, filtering, it is 7.0 that filter residue, which is washed to filtrate pH, then dries at 60 DEG C to constant weight, obtains the silicic acid of modification
Magnalium；Wherein, the aluminium-magnesium silicate, titanate coupling agent, hydrolysis of polymaleic anhydride and N- hydroxyethyl acrylamide weight ratio
For 15:1.3:7:10；
Remaining is constant, and composite flocculation agent is prepared according to the preparation method of embodiment 1.
Comparative example 1
As embodiment 1 provide composite flocculation agent preparation method, unlike, in step (3), the activation red mud
Powder, aluminium-magnesium silicate, ethylene glycol diglycidylether, ethyl alcohol weight ratio be 1:0.1:0.1:0.5；
Remaining is constant, and composite flocculation agent is prepared according to the preparation method of embodiment 1.
Comparative example 2
As embodiment 1 provide composite flocculation agent preparation method, unlike, in step (3), the activation red mud
Powder, aluminium-magnesium silicate, ethylene glycol diglycidylether, ethyl alcohol weight ratio be 1:0.8:0.1:0.5；
Remaining is constant, and composite flocculation agent is prepared according to the preparation method of embodiment 1.
Comparative example 3
As embodiment 1 provide composite flocculation agent preparation method, unlike, it is direct to red mud powder in step (2)
High-temperature roasting processing is carried out, the temperature of calcination process, time conditions are identical as in embodiment 1；Then by being walked in embodiment 1
Suddenly (3) are handled, and obtain composite flocculation agent.
Comparative example 4
As embodiment 1 provide composite flocculation agent preparation method, unlike, in step (3), to activation red mud powder in
Aluminium-magnesium silicate is added, the ethanol solution of ethylene glycol diglycidylether is sprayed into during being stirred, is uniformly mixed
Afterwards, dry to constant weight when temperature is 60 DEG C, and pressure condition is normal pressure, obtain the composite flocculation agent.
The composite flocculation agent being prepared using above-described embodiment 1-8, comparative example 1-4 is dirty to living with a batch of each 1t
Water is handled, additive amount 10kg；And using the aluminium polychloride of equivalent (be purchased from Xinhua of Henan Gongyi City chemical plant) as pair
Ratio 5, anionic polyacrylamide (be purchased from Xinhua of Henan Gongyi City chemical plant) 6, cationic polyacrylamide as a comparison case
(be purchased from Xinhua of Henan Gongyi City chemical plant) as a comparison case 7.
Wastewater suspended substance index before and after the above-mentioned flocculant process of sampling and testing, calculates flocculant and suspended matter is gone
Except rate and it is recorded in table 1.
Table 1:
It can be seen that composite flocculation agent provided by the invention with excellent flocculating effect, energy in conjunction with above-mentioned test data
Suspended matter in enough efficient removal sewage.
Based on above-mentioned test result, the flocculant 5kg of special selection example 1,6 and comparative example 5,6,7 puts into same batch
In the sanitary sewage of secondary 1t, wastewater suspended substance index before and after the above-mentioned flocculant process of sampling and testing, calculate flocculant for
The removal rate of suspended matter is simultaneously recorded in table 2.
Table 2:
| Removal efficiency (%) | |
| Embodiment 1 | 89.52 |
| Embodiment 6 | 92.64 |
| Comparative example 5 | 54.38 |
| Comparative example 6 | 58.21 |
| Comparative example 7 | 60.82 |
Can be seen that composite flocculation agent provided by the invention in conjunction with above-mentioned test data has preferably in lower dosage
Flocculating effect.
Basic principles and main features and the features of the present invention of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement is both fallen in the range of claimed invention.The scope of protection of present invention is by appended claims
And its equivalent thereof.
Claims (6)
1. a kind of preparation method of the sanitary sewage disposal composite flocculation agent based on red mud, it is characterised in that: including following step
It is rapid:
(1) Waste Sulfuric Acid is added into red mud, is stirred, is filtered after standing 30~60min, much filtrate is dried, grinding refinement
The red mud powder that granularity is 90~100 mesh is obtained, it is spare；
(2) coal dust is added into red mud powder, carries out high-temperature roasting after mixing, obtains activation red mud powder；
(3) aluminium-magnesium silicate is added into activation red mud powder, ethylene glycol diglycidylether is sprayed into during being stirred
Ethanol solution after being uniformly mixed, is put into vacuum oven and dries to constant weight to get the composite flocculation agent.
2. the preparation method of the sanitary sewage disposal composite flocculation agent according to claim 1 based on red mud, feature
Be: in step (1), the additional amount of the Waste Sulfuric Acid be subject to be stirred standing after upper layer waste liquid pH value be 6.0~7.0.
3. the preparation method of the sanitary sewage disposal composite flocculation agent according to claim 1 based on red mud, feature
Be: in step (2), the weight ratio of the red mud powder and coal dust is 1:(0.3~0.5)；
The condition of the high-temperature roasting includes that maturing temperature is 450~600 DEG C, and pressure is -150~0MPa in roaster.
4. the preparation method of the sanitary sewage disposal composite flocculation agent according to claim 1 based on red mud, feature
Be: in step (3), activation red mud powder, aluminium-magnesium silicate, ethylene glycol diglycidylether, ethyl alcohol weight ratio be 1:(0.2~
0.5): (0.05~0.2): (0.3~0.8).
5. the preparation method of the sanitary sewage disposal composite flocculation agent according to claim 1 based on red mud, feature
Be: in step (3), vacuum drying condition includes in the vacuum oven, and temperature is 50~70 DEG C, vacuum degree 0.15
~0.5MPa.
6. at a kind of sanitary sewage based on red mud that preparation method as claimed in any one of claims 1 to 5, wherein is prepared
Reason uses composite flocculation agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811310081.XA CN109133295A (en) | 2018-11-05 | 2018-11-05 | Sanitary sewage disposal composite flocculation agent based on red mud and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811310081.XA CN109133295A (en) | 2018-11-05 | 2018-11-05 | Sanitary sewage disposal composite flocculation agent based on red mud and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112320969A (en) * | 2020-10-19 | 2021-02-05 | 辽宁科技学院 | Preparation method of traditional Chinese medicine wastewater treatment agent based on microorganisms |
| CN114477382A (en) * | 2022-01-13 | 2022-05-13 | 安庆师范大学 | Preparation method and application of composite adsorption-catalysis material |
-
2018
- 2018-11-05 CN CN201811310081.XA patent/CN109133295A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112320969A (en) * | 2020-10-19 | 2021-02-05 | 辽宁科技学院 | Preparation method of traditional Chinese medicine wastewater treatment agent based on microorganisms |
| CN114477382A (en) * | 2022-01-13 | 2022-05-13 | 安庆师范大学 | Preparation method and application of composite adsorption-catalysis material |
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