CN114620789A - Modified graphene/polyaluminum chloride water purifying agent and preparation method thereof - Google Patents
Modified graphene/polyaluminum chloride water purifying agent and preparation method thereof Download PDFInfo
- Publication number
- CN114620789A CN114620789A CN202210315457.6A CN202210315457A CN114620789A CN 114620789 A CN114620789 A CN 114620789A CN 202210315457 A CN202210315457 A CN 202210315457A CN 114620789 A CN114620789 A CN 114620789A
- Authority
- CN
- China
- Prior art keywords
- modified graphene
- water purifying
- purifying agent
- polyaluminum chloride
- graphene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a modified graphene/polyaluminium chloride water purifying agent and a preparation method thereof, relating to the technical field of water treatment, wherein the modified graphene/polyaluminium chloride water purifying agent comprises the following raw materials in percentage by weight: 20-40% of modified graphene-based adsorption material, 5-20% of flocculation settling agent and the balance of water. According to the method, graphene oxide and dicyandiamide-formaldehyde polycondensate are used as raw materials to prepare a graphene oxide adsorption base material, and the dicyandiamide-formaldehyde polycondensate which has strong adsorption reaction capacity on water-soluble anionic colored substances such as reactive dyes is introduced, so that the decoloration adsorption capacity of the modified graphene-based adsorption material on dye wastewater is enhanced; the graphene oxide has delocalized large pi bonds, and has stronger attraction effect on organic pollutants containing benzene ring (or similar benzene ring) structures, so that two phases are synergistic, and the water purifying effect of the water purifying agent is improved. The water purifying agent of the present invention has the advantages of low consumption, complete decolorization, etc.
Description
Technical Field
The invention relates to the technical field of water treatment, and particularly relates to a modified graphene/polyaluminum chloride water purifying agent and a preparation method thereof.
Background
As the sewage treatment coagulant with the highest utilization rate at present, the polyaluminium chloride is applied to the wastewater treatment of various industries, the polyaluminium chloride can also be used as a very excellent decoloring agent, and the decoloration rate of the polyaluminium chloride is very high for wastewater containing water-soluble dyes such as active, direct, cationic and acidic dyes due to the influence of chemical components of the polyaluminium chloride; has better decolorizing effect on disperse dyes. The main principle of decolorization is that the components of the polyaluminium chloride chemically react with the suspended matters or ions in the filtrate to change the color of the filtrate. But at the same time, the removal rate of the colored organic matters dissolved in the water still needs to be improved.
The invention patent CN110743500A discloses a modified graphene oxide adsorbent, a preparation method and application thereof, and CN107282001B discloses a method for adsorbing and removing fatty acid in wastewater by using polyaluminium chloride modified graphene oxide, wherein the modified graphene oxide adsorbent is modified, but the modified graphene oxide adsorbent does not have good adsorption performance on colored substances (such as active dyes and disperse dyes which all contain anionic dyes or colored organic matters) in printing and dyeing wastewater.
Disclosure of Invention
The invention aims to provide a modified graphene/polyaluminium chloride water purifying agent and a preparation method thereof, and solves the following technical problems:
(1) the existing sewage treatment coagulant has low removal rate of colored organic dyes dissolved in water.
The purpose of the invention can be realized by the following technical scheme:
a modified graphene/polyaluminium chloride water purifying agent comprises the following raw materials in percentage by weight: 20-40% of modified graphene-based adsorption material, 5-20% of flocculation settling agent and the balance of water.
As a further scheme of the invention: the flocculation settling agent is polyaluminium chloride.
As a further scheme of the invention: adding graphene oxide into deionized water, stirring and mixing uniformly to obtain a graphene oxide dispersion liquid, carrying out ultrasonic treatment for 1-4h under the stirring condition, heating to 50-70 ℃, stopping ultrasonic treatment, then slowly dropwise adding a cation decolorizing agent under the continuous stirring condition, and continuously carrying out heat preservation reaction for 4-6h to obtain the modified graphene-based adsorbing material.
As a further scheme of the invention: the mass ratio of the graphene oxide to the deionized water is 5-10: 100.
as a further scheme of the invention: the cation decolorant is dicyandiamide formaldehyde polycondensate.
As a further scheme of the invention: the mass ratio of the cationic decolorizing agent to the graphene oxide is 0.01-10: 100.
as a further scheme of the invention: the preparation method of the modified graphene/polyaluminium chloride water purifying agent comprises the following steps of adding 20 mass percent of polyaluminium chloride into a modified graphene-based adsorbing material, adjusting the pH value to 6-8, heating to 40-60 ℃, carrying out heat preservation reaction for 1-4h, and filtering to obtain the modified graphene/polyaluminium chloride water purifying agent.
As a further scheme of the invention: the mass ratio of the polyaluminium chloride to the graphene oxide is 10-50: 100.
the invention has the beneficial effects that:
1. according to the invention, the graphene oxide adsorption base material is prepared by taking graphene oxide and dicyandiamide-formaldehyde polycondensate as raw materials, and the dicyandiamide-formaldehyde polycondensate which has strong adsorption reaction capability on water-soluble anionic colored substances such as reactive dyes is introduced into the internal structure of the graphene oxide adsorption base material, so that the decoloring adsorption capability of the modified graphene-based adsorption material on dye wastewater is greatly enhanced, and the method has the advantages of low consumption and thorough decoloring. Moreover, the graphene oxide has a regular hexagonal aromatic structure, delocalized large pi bonds exist in a plane, and delocalized pi bonds also exist in organic pollutants containing a benzene ring (or similar benzene ring) structure, so that when the two are close to each other, a stronger attraction effect can be generated, the two phases are synergistic, and the water purifying effect of the water purifying agent is improved. The method is characterized in that a dicyandiamide formaldehyde polycondensate with a proper mass ratio and graphene oxide are selected to prepare a graphene oxide adsorption base material aiming at tail end discharged wastewater and generally low chroma.
2. According to the invention, the graphene oxide contains rich oxygen-containing groups, oxygen atoms contain lone-pair electrons, metal ions contain empty tracks, the water purifying agent is added into the sewage, and the water purifying agent and the metal ions in the sewage are coordinated to form a complex, so that the water purifying agent has a flocculation and sedimentation effect on the metal ions in the sewage, and the content of heavy metal pollutants in the sewage is effectively reduced. The oxygen-containing functional group of the graphene oxide can also perform a grafting reaction with other groups with strong coordination performance, so that the capability of the graphene-based material for coordinating and complexing metal ions is further enhanced.
3. In the dissolving process of the modified graphene/polyaluminum chloride water purifying agent prepared by the invention, hydroxide ions of the polyaluminum chloride release a large amount of positive charges to adsorb negative charge ions in water, and the modified graphene/polyaluminum chloride water purifying agent is quick and thick in flocculation formation and high in activity. The precipitation is fast. Can effectively improve the turbidity of the effluent and accelerate the rapid aggregation and sedimentation of suspended matters, so that the upper water quality after sedimentation can be rapidly filtered to obtain clear water quality and improve the water production capacity. When the modified graphene/polyaluminum chloride water purifying agent prepared by the invention is used for treating tail-end up-to-standard discharge water of printing and dyeing wastewater, the using amount is 0.5-5g/L, and the chroma of the treated wastewater can reach less than 10. The water purifying agent has the advantages of low consumption, complete decolorization and the like, can be used for recycling terminal discharge water after treatment of printing and dyeing sewage, can obtain clear and transparent water quality, can solve the problem of heavy metal exceeding standard (such as metal ions including calcium, magnesium, iron, antimony and the like), and has the advantages of high settling speed of suspended matters, high filtering speed and high water yield.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below with reference to embodiments of the present invention, and it should be apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a modified graphene/polyaluminium chloride water purifying agent comprises the following raw materials in percentage by weight: 20% of modified graphene-based adsorption material, 20% of polyaluminium chloride and the balance of water.
The preparation method of the modified graphene/polyaluminium chloride water purifying agent comprises the following steps:
(1) adding 8g of graphene oxide into 100g of deionized water, stirring and mixing uniformly to obtain a graphene oxide dispersion liquid, carrying out ultrasonic treatment for 3h under the stirring condition, heating to 60 ℃, stopping the ultrasonic treatment, then slowly dropwise adding 10mL of aqueous solution containing 0.5g of dicyandiamide-formaldehyde polycondensate under the continuous stirring condition, and continuing to carry out heat preservation reaction for 5h to obtain the modified graphene-based adsorbing material.
(2) And (2) adding 42.5g of polyaluminum chloride aqueous solution with the mass concentration of 20% into the modified graphene-based adsorbing material obtained in the step (1), adjusting the pH to 7, heating to 50 ℃, keeping the temperature, reacting for 3 hours, and filtering to obtain the modified graphene/polyaluminum chloride water purifying agent.
Example 2:
a modified graphene/polyaluminium chloride water purifying agent comprises the following raw materials in percentage by weight: 30% of modified graphene-based adsorption material, 15% of polyaluminium chloride and the balance of water.
The preparation method of the modified graphene/polyaluminium chloride water purifying agent comprises the following steps:
(1) adding 10g of graphene oxide into 100g of deionized water, stirring and mixing uniformly to obtain a graphene oxide dispersion liquid, carrying out ultrasonic treatment for 4h under the stirring condition, heating to 45 ℃, stopping the ultrasonic treatment, then slowly dropwise adding a plurality of 10mL aqueous solutions containing 0.1g of dicyandiamide-formaldehyde polycondensate under the continuous stirring condition, and continuously carrying out heat preservation reaction for 4h to obtain the modified graphene-based adsorbing material.
(2) And (2) adding 25.25g of polyaluminum chloride aqueous solution with the mass concentration of 20% into the modified graphene-based adsorbing material obtained in the step (1), adjusting the pH to 7, heating to 60 ℃, keeping the temperature, reacting for 1h, and filtering to obtain the modified graphene/polyaluminum chloride water purifying agent.
Example 3:
a modified graphene/polyaluminium chloride water purifying agent comprises the following raw materials in percentage by weight: 35% of modified graphene-based adsorption material, 10% of polyaluminium chloride and the balance of water.
The preparation method of the modified graphene/polyaluminum chloride water purifying agent comprises the following steps:
(1) adding 6g of graphene oxide into 100g of deionized water, stirring and mixing uniformly to obtain a graphene oxide dispersion, carrying out ultrasonic treatment for 2h under the stirring condition, heating to 40 ℃, stopping the ultrasonic treatment, slowly dropwise adding 10mL of aqueous solution containing 0.01g of dicyandiamide-formaldehyde polycondensate under the continuous stirring condition, and continuously carrying out heat preservation reaction for 6h to obtain the modified graphene-based adsorbing material.
(2) And (2) adding 8.71g of polyaluminum chloride aqueous solution with the mass concentration of 20% into the modified graphene-based adsorbing material obtained in the step (1), adjusting the pH to 7, heating to 40 ℃, keeping the temperature, reacting for 4 hours, and filtering to obtain the modified graphene/polyaluminum chloride water purifying agent.
Example 4:
a modified graphene/polyaluminium chloride water purifying agent comprises the following raw materials in percentage by weight: 40% of modified graphene-based adsorption material, 5% of polyaluminium chloride and the balance of water.
The preparation method of the modified graphene/polyaluminum chloride water purifying agent comprises the following steps:
(1) adding 5g of graphene oxide into 100g of deionized water, stirring and mixing uniformly to obtain a graphene oxide dispersion liquid, carrying out ultrasonic treatment for 1h under the stirring condition, heating to 55 ℃, stopping ultrasonic treatment, then slowly dropwise adding 10mL of dicyandiamide-formaldehyde-containing polycondensate containing 0.3g of dicyandiamide-formaldehyde under the continuous stirring condition, and continuously carrying out heat preservation reaction for 4.5h to obtain the modified graphene-based adsorbing material.
(2) And (2) adding 3.31g of polyaluminum chloride aqueous solution with the mass concentration of 20% into the modified graphene-based adsorbing material obtained in the step (1), adjusting the pH to 7, heating to 50 ℃, keeping the temperature, reacting for 3 hours, and filtering to obtain the modified graphene/polyaluminum chloride water purifying agent.
Comparative example 1:
the preparation method of the modified graphene water purifying agent comprises the following steps:
(1) adding 8g of graphene oxide into 100g of deionized water, stirring and mixing uniformly to obtain a graphene oxide dispersion liquid, carrying out ultrasonic treatment for 3h under the stirring condition, heating to 60 ℃, stopping the ultrasonic treatment, then slowly dropwise adding 0.5g of dicyandiamide formaldehyde polycondensate under the continuous stirring condition, and continuing to carry out heat preservation reaction for 5h to obtain the modified graphene-based adsorbing material.
Experimental detection
1. And (3) testing the chromaticity:
a portable HANNA HI97727 platinum-cobalt chromaticity tester is adopted to calibrate a blank standard sample by using optical pure water, and then a test water sample is directly tested to read the chromaticity of the sample.
2. Turbidity test:
the test method refers to the national standard GB/T13200-.
3. And (3) hardness testing:
the test method refers to the national standard GB/T7477-87 to determine the test water sample.
Wastewater treatment:
(1) measuring a water sample of tail end discharged water of the printing and dyeing wastewater, and recording various indexes before treatment;
(2) respectively taking 500mL of the wastewater, respectively adding 0.1g, 0.2g, 0.5g, 1.0g and 2.0g of the water purifying agent prepared in the example 1 into each water sample, keeping the stirring state, and directly performing suction filtration treatment by using a Buchner funnel after 15min to obtain a treated clarified water sample;
(3) and (3) determining each index of the water sample obtained in the step (2) again, wherein the detection result is shown in a table 1-2.
Table 1: results of testing water quality after treatment in example 1 and comparative example 1
Table 2: examples 2 to 4 test results of the Water quality after treatment
As can be seen from the detection results in tables 1-2, the water purifying agent prepared by the invention is used for recycling terminal discharge water after treatment of printing and dyeing sewage, can obtain clear and transparent water quality, can solve the problem of heavy metal exceeding standard (such as metal ions including calcium, magnesium, iron, antimony and the like), and has the advantages of high suspended matter settling speed, high filtering speed and high water yield.
The four embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (8)
1. The modified graphene/polyaluminium chloride water purifying agent is characterized by comprising the following raw materials in percentage by weight: 20-40% of modified graphene-based adsorption material, 5-20% of flocculation settling agent and the balance of water.
2. The modified graphene/polyaluminum chloride water purifying agent of claim 1, wherein the flocculating settling agent is polyaluminum chloride.
3. The modified graphene/polyaluminum chloride water purifying agent according to claim 1, wherein the preparation method of the modified graphene-based adsorbing material comprises the following steps of adding graphene oxide into deionized water, stirring and mixing to obtain a graphene oxide dispersion, carrying out ultrasonic treatment for 1-4h under the stirring condition, heating to 50-70 ℃, stopping the ultrasonic treatment, then slowly dropwise adding a cation decolorizing agent under the continuous stirring condition, and continuously carrying out heat preservation reaction for 4-6h to obtain the modified graphene-based adsorbing material.
4. The modified graphene/polyaluminum chloride water purifying agent according to claim 3, wherein the mass ratio of graphene oxide to deionized water is 5-10: 100.
5. the modified graphene/polyaluminum chloride water purifying agent of claim 3, wherein the cationic decolorant is dicyandiamide formaldehyde polycondensate.
6. The modified graphene/polyaluminum chloride water purifying agent of claim 3, wherein the mass ratio of the cationic decolorant to the graphene oxide is 0.01-10: 100.
7. the modified graphene/polyaluminum chloride water purifying agent according to claim 1, wherein the preparation method of the modified graphene/polyaluminum chloride water purifying agent comprises the steps of adding 20% by mass of polyaluminum chloride into a modified graphene-based adsorbing material, adjusting the pH to 6-8, heating to 40-60 ℃, carrying out heat preservation reaction for 1-4h, and filtering to obtain the modified graphene/polyaluminum chloride water purifying agent.
8. The modified graphene/polyaluminum chloride water purifying agent according to claim 7, wherein the mass ratio of polyaluminum chloride to graphene oxide is 10-50: 100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210315457.6A CN114620789B (en) | 2022-03-28 | 2022-03-28 | Modified graphene/polyaluminum chloride water purifying agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210315457.6A CN114620789B (en) | 2022-03-28 | 2022-03-28 | Modified graphene/polyaluminum chloride water purifying agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114620789A true CN114620789A (en) | 2022-06-14 |
| CN114620789B CN114620789B (en) | 2023-03-17 |
Family
ID=81904695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210315457.6A Active CN114620789B (en) | 2022-03-28 | 2022-03-28 | Modified graphene/polyaluminum chloride water purifying agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114620789B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974375A (en) * | 2012-11-28 | 2013-03-20 | 江苏大学 | Multifunctional composite material with heterostructure and preparation method thereof |
| CN104973596A (en) * | 2015-06-30 | 2015-10-14 | 华南理工大学 | Hetero atom-doped hollow spherical grapheme composite material, and preparation method and applications thereof |
| CN106345466A (en) * | 2016-07-31 | 2017-01-25 | 上田环境修复股份有限公司 | Method for preparing hydroxylation graphene oxide-magnesium titanate/silver molybdate composite materials |
| CN107282001A (en) * | 2017-06-30 | 2017-10-24 | 武汉工程大学 | A kind of preparation of aluminium polychloride modified graphene oxide adsorbent and its application process |
| US20180291266A1 (en) * | 2016-03-11 | 2018-10-11 | Dalian University Of Technology | A carbon quantum dot synthesizing method and its application of modifying functional water purification material |
| CN110743500A (en) * | 2019-10-11 | 2020-02-04 | 南京师范大学 | A kind of modified graphene oxide adsorbent and preparation method and application thereof |
-
2022
- 2022-03-28 CN CN202210315457.6A patent/CN114620789B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974375A (en) * | 2012-11-28 | 2013-03-20 | 江苏大学 | Multifunctional composite material with heterostructure and preparation method thereof |
| CN104973596A (en) * | 2015-06-30 | 2015-10-14 | 华南理工大学 | Hetero atom-doped hollow spherical grapheme composite material, and preparation method and applications thereof |
| US20180291266A1 (en) * | 2016-03-11 | 2018-10-11 | Dalian University Of Technology | A carbon quantum dot synthesizing method and its application of modifying functional water purification material |
| CN106345466A (en) * | 2016-07-31 | 2017-01-25 | 上田环境修复股份有限公司 | Method for preparing hydroxylation graphene oxide-magnesium titanate/silver molybdate composite materials |
| CN107282001A (en) * | 2017-06-30 | 2017-10-24 | 武汉工程大学 | A kind of preparation of aluminium polychloride modified graphene oxide adsorbent and its application process |
| CN110743500A (en) * | 2019-10-11 | 2020-02-04 | 南京师范大学 | A kind of modified graphene oxide adsorbent and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 付长璟: "《石墨烯的制备、结构及应用》", 30 June 2017, 哈尔滨工业大学出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114620789B (en) | 2023-03-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104261535B (en) | Dyeing waste water high-efficiency decolorant and decoloration treatment method | |
| CN109626483B (en) | Industrial wastewater treatment agent and preparation method thereof | |
| CN110316800B (en) | Preparation and application methods of flocculant for coking wastewater treatment | |
| CN104710038A (en) | Method for coagulation decoloration of dyeing waste water with cellulose flocculant | |
| CN103663661A (en) | Treatment method of hexavalent chromium ion containing industrial wastewater | |
| CN106745591A (en) | A kind of preparation method of heavy metal ion adsorbed type composite flocculation agent and products thereof | |
| CN114620789B (en) | Modified graphene/polyaluminum chloride water purifying agent and preparation method thereof | |
| CN112473733B (en) | Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst and application thereof | |
| CN107381869A (en) | A kind of method for handling methylene blue waste water | |
| CN108057425B (en) | Sewage treatment adsorbent and preparation method thereof | |
| CN110963558A (en) | Fenton-like reagent and application thereof in organic wastewater treatment | |
| CN102531126B (en) | Method of Treating Papermaking Black Liquor by Composite Coagulation | |
| CN106006823A (en) | Cassava-dreg-based printing and dyeing wastewater treatment agent | |
| CN109867342A (en) | A kind of processing method for sewage of digging up mine | |
| CN111153454B (en) | High-efficiency fiber sewage purifying agent and preparation method thereof | |
| CN112939176B (en) | Coal washing wastewater treating agent, and preparation method and application thereof | |
| CN114735738A (en) | Production process of iron-free high-purity aluminum sulfate | |
| CN107162143A (en) | Dyeing waste water purifies flocculant and its dyeing waste water purification applications | |
| US4088573A (en) | Method for clarifying aqueous waste liquids containing acid dyes | |
| CN1129676A (en) | Preparation and application of high performance decolourizing flocculent | |
| CN115140798B (en) | Sewage treatment agent for paper industry wastewater and preparation method thereof | |
| CN108467466A (en) | A kind of aluminum sulfate as catalyst prepares the method and its application of high viscosity dicandiamide-formaldehyde condensation polymer | |
| CN1281516C (en) | Flocculant for purification of printing and dyeing wastewater | |
| CN103752265A (en) | Preparation method and application of composite modified zeolite | |
| CN114620854B (en) | Treatment method of process wastewater from rubber vulcanization accelerator production by oxidation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |