CN114772707A - Hydrophilic modified ceramsite filter material and preparation method thereof - Google Patents

Hydrophilic modified ceramsite filter material and preparation method thereof Download PDF

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CN114772707A
CN114772707A CN202210707831.7A CN202210707831A CN114772707A CN 114772707 A CN114772707 A CN 114772707A CN 202210707831 A CN202210707831 A CN 202210707831A CN 114772707 A CN114772707 A CN 114772707A
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filter material
ceramsite filter
hydrophilic
polyethylene glycol
ceramsite
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CN114772707B (en
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郭艳芬
李新凯
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Tianjin Chengxin International Environmental Protection & Energy Conservation Technologies Co ltd
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Tianjin Chengxin International Environmental Protection & Energy Conservation Technologies Co ltd
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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
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/02—Loose filtering material, e.g. loose fibres
    • B01D39/06—Inorganic material, e.g. asbestos fibres, glass beads or fibres
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
    • 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
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a hydrophilic modified ceramsite filter material and a preparation method thereof, wherein the preparation method comprises the following steps: step one, placing a ceramsite filter material in a strong alkaline solution for soaking, and drying to obtain a ceramsite filter material with an activated surface; and step two. Soaking the ceramsite filter material with the activated surface in a modification solution for modification, wherein the modification solution comprises a hydrophilic modifier and a carbon source; and step three, washing and drying the modified ceramsite filter material obtained in the step two to obtain the hydrophilic modified ceramsite filter material. According to the hydrophilic modified ceramsite filter material and the preparation method thereof, a chemical grafting mode is adopted, so that the surface of the ceramsite filter material is combined with the hydrophilic modifier and the carbon source through chemical bonds, the hydrophilic characteristic of the prepared ceramsite filter material can be maintained for a long time, the carbon source does not fall off actively, secondary pollution is not generated, and the nitrogen removal frequency is effectively reduced.

Description

Hydrophilic modified ceramsite filter material and preparation method thereof
Technical Field
The invention relates to the technical field of new materials, and relates to a hydrophilic modified ceramsite filter material, in particular to a hydrophilic modified ceramsite filter material and a preparation method thereof.
Background
The ceramsite filter material is used as a spherical porous light filter material and is often applied to water treatment processes of a biological aerated filter, a denitrification deep bed filter and the like. Wherein, the aeration biological filter and the denitrification deep bed filter are sewage treatment units integrating biological membranes and filtering functions, and part of microorganisms in the tank are attached to the surface of a filter material to gradually generate the biological membranes in the filtering process so as to consume pollutants in water. Compared with the conventional sewage advanced treatment process, the filtration technology has the advantages of lower treatment cost and higher effluent quality. However, the key to the removal of pollutants by this type of process is that the biological membrane attached to the surface of the filter material has the function of degrading pollutants.
Research has found that the surface structure and characteristics of the filter material are important factors influencing the adhesion of microorganisms. On one hand, the ceramsite filter material has a porous structure and a large specific surface area, and is favorable for the attachment of microorganisms; on the other hand, the hydrophilicity and hydrophobicity of the surface of the filter material also influence the attachment of the biological membrane, and the improvement of the hydrophilicity of the surface of the ceramsite filter material is beneficial to the attachment of microorganisms.
In the process of operating the denitrification deep bed filter tank process in the prior art, in the initial stage of denitrification starting, in order to quickly form a membrane, a liquid carbon source is added in the conventional method, and the method has the defect that the COD (chemical oxygen demand) of effluent is easy to exceed the standard. In addition, with the progress of the denitrification process, the nitrate in the sewage generates nitrogen under the action of microorganisms. The nitrogen can be attached to the surface of the filter material, so that the water passing through the filter layer after filtration is reduced, and the water head loss of the filter tank is increased. In response to this problem, it is common practice to release the accumulated gas in the filter bed by hydraulically driving the nitrogen. However, the energy consumption is significantly increased by frequently removing nitrogen, so further research needs to be carried out on the ceramsite filter material to improve the frequent nitrogen removal problem, so that the surface of the filter material has super-hydrophilicity, nitrogen is not easy to attach, the nitrogen removal frequency can be reduced or the nitrogen removal step is omitted, and energy conservation and consumption reduction are achieved.
At present, the method for carrying out super-hydrophilic modification on the surface of a ceramsite filter material is less, and a surface coating method is generally adopted. The method can quickly improve the hydrophilicity of the surface of the filter material, but the binding force between the coating layer and the filter material is mainly dependent on Van der Waals force and is relatively weak, so that the coating is easy to fall off, the service life of the filter material is shortened, and secondary pollution is caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a hydrophilic modified ceramsite filter material and a preparation method thereof.
A preparation method of a hydrophilic modified ceramsite filter material comprises the following steps:
the method comprises the following steps: soaking the ceramsite filter material in a strong alkaline solution, and drying to obtain a ceramsite filter material with an activated surface;
step two: soaking the surface-activated ceramsite filter material obtained in the step one in a modification solution for modification, wherein the modification solution comprises a hydrophilic modifier and a carbon source;
step three: and (5) washing and drying the modified ceramsite filter material obtained in the step two to obtain the hydrophilic modified ceramsite filter material.
In the first step, the ceramsite filter material is ceramsite which is formed by sintering pottery clay containing silicon oxide, aluminum oxide, iron oxide, calcium oxide and magnesium oxide.
Preferably, in the first step, the strong alkali solution includes at least one of sodium hydroxide, potassium hydroxide or barium hydroxide.
Preferably, in the first step, the mass concentration of the strong alkali solution is 2-15%.
Preferably, in the second step, polyethylene glycol is used as the hydrophilic modifier; the carbon source comprises at least one of chitosan, water-soluble starch or carboxymethyl cellulose.
Preferably, in the second step, the polyethylene glycol includes at least one of polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 800, polyethylene glycol 1000, polyethylene glycol 2000, polyethylene glycol 5000, and polyethylene glycol 10000.
Preferably, in the modifying solution used in the second step, the mass concentration of the hydrophilic modifier is 0.5-10%, and the mass concentration of the carbon source is 0.1-3%.
Preferably, in the step one, the ceramsite filter material is soaked in the strong alkali solution for 0.5 to 4 hours.
Preferably, in the second step, the ceramsite filter material with the activated surface is placed in the modified solution for soaking for 1-15 min.
The ceramsite filter material prepared by the preparation method of the hydrophilic modified ceramsite filter material is prepared by any one method.
The invention has the advantages and the technical effects that:
according to the hydrophilic modified ceramsite filter material, the hydrophilic layer and the carbon source are not easy to fall off and are uniformly distributed, secondary pollution is avoided, the hydrophilic layer and the carbon source have stable, long-acting hydrophilicity and biocompatibility, the film-forming speed and the film-forming modulus of the surface of the filter material are effectively improved, nitrogen generated in the denitrification process is not easy to attach to the surface of the filter material, the nitrogen-expelling frequency can be effectively reduced, or the nitrogen-expelling step can be omitted, so that the energy consumption is remarkably reduced.
The preparation method of the hydrophilic modified ceramsite filter material has the following advantages:
1. taking a ceramsite filter material as a raw material, and activating the surface of the ceramsite filter material by adopting an alkali liquor to generate active grafting point sites on the surface of the filter material so as to prepare for subsequent chemical grafting;
2. the activated filter material is immersed into a hydrophilic modifier and a carbon source solution for chemical grafting, so that the ceramsite filter material with both surface super-hydrophilicity and a temporary carbon source is prepared, and has stable and long-acting hydrophilicity and biocompatibility, the membrane forming speed and the membrane forming amount on the surface of the filter material are effectively improved, and the problem that the COD (chemical oxygen demand) of effluent at the initial stage of membrane forming exceeds the standard is avoided;
3. the hydrophilic modifier and the carbon source are combined with the surface of the filter material through chemical bonds, so that the hydrophilic layer and the carbon source of the prepared ceramsite filter material are not easy to fall off, are uniformly distributed, have good stability, can keep the hydrophilic characteristic for a long time, and do not actively fall off and generate secondary pollution;
4. the prepared ceramsite filter material has excellent hydrophilic performance, nitrogen generated in the denitrification process is not easy to attach to the surface of the filter material, the nitrogen removal frequency is effectively reduced, or the nitrogen removal step can be omitted, so that the energy consumption is remarkably reduced;
5. the preparation process is simple and easy for industrial application.
Drawings
FIG. 1 is a schematic view of a reaction formula of grafting polyethylene glycol on the surface of a ceramsite filter material according to the present invention;
FIG. 2 is a schematic diagram of the reaction formula of the ceramsite filter material surface grafted with water-soluble starch according to the present invention;
FIG. 3 is a schematic view of the reaction formula of the chitosan grafted on the surface of the ceramsite filter material.
Detailed Description
For a further understanding of the contents, features and effects of the present invention, reference will now be made to the following examples, which are illustrated in the accompanying drawings. It should be noted that the present embodiment is illustrative, not restrictive, and the scope of the invention should not be limited thereby.
The invention relates to a preparation method of a hydrophilic modified ceramsite filter material, which comprises the following steps:
step one, placing the ceramsite filter material in a strong alkaline solution for soaking, and drying to obtain the ceramsite filter material with activated surface;
secondly, soaking the ceramsite filter material with the activated surface in a modification solution for modification, wherein the modification solution comprises a hydrophilic modifier and a carbon source;
and step three, washing and drying the modified ceramsite filter material obtained in the step two to obtain the hydrophilic modified ceramsite filter material.
In some embodiments, in the first step, the ceramsite filter material is a ceramsite obtained by sintering pottery clay containing silica, alumina, iron oxide, calcium oxide or magnesium oxide. In the method of the embodiment of the invention, no particular limitation is imposed on the ceramsite filter material, and the conventional commonly used ceramsite filter material can be modified by the method of the embodiment of the invention to obviously improve the hydrophilic property of the ceramsite filter material.
In some embodiments, in the first step, the strong alkali solution includes at least one of sodium hydroxide, potassium hydroxide or barium hydroxide, and preferably, the strong alkali solution has a mass concentration of 2-15%. In the embodiment of the invention, strong alkali is preferably adopted to activate the ceramsite filter material, so that active grafting point sites are generated on the surface of the filter material, if alkali activation treatment is not performed in advance, the ceramsite filter material is only immersed into the modification solution in the follow-up process, only simple coating can be realized, no chemical bond is generated, and a coating layer is very easy to fall off in the using process of the ceramsite filter material, so that the coating layer is ineffective.
In some embodiments, in the second step, the hydrophilic modifier comprises polyethylene glycol, preferably at least one of polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 800, polyethylene glycol 1000, polyethylene glycol 2000, polyethylene glycol 5000, and polyethylene glycol 10000, and the carbon source comprises at least one of chitosan, water-soluble starch, or carboxymethyl cellulose. Further preferably, in the modification solution, the mass concentration of the hydrophilic modifier is 0.5 to 10%, and the mass concentration of the carbon source is 0.1 to 3%. According to the embodiment of the invention, polyethylene glycol and a macromolecular carbon source are adopted to form a modified solution, polyethylene glycol and macromolecular saccharides are grafted on the surface of a ceramsite filter material, after alkali treatment is carried out on the ceramsite filter material, silicon dioxide contained on the surface of the filter material reacts with strong base to generate-Si-O active sites, after the ceramsite filter material is immersed in the modified solution, the active sites react with hydroxyl groups in the polyethylene glycol, the polyethylene glycol is grafted on the surface of the filter material, the active sites react with the hydroxyl groups in the macromolecular saccharides to graft a carbon source on the surface of the filter material, the grafted polyethylene glycol and the carbon source have synergistic effect, the hydrophilic performance of the ceramsite filter material is obviously improved, meanwhile, the grafted carbon source can realize rapid film formation under the condition that no liquid carbon source is additionally added, and the problem that the effluent COD exceeds the standard due to the addition of too much extra carbon source is avoided.
In some embodiments, in step one, the soaking time is 0.5-4 h; in the second step, the soaking time is 1-15 min. In the embodiment of the invention, the time for activating and modifying the surface of the ceramsite filter material is optimized, so that the hydrophilic performance is further improved, and the production efficiency is improved.
The embodiment of the invention also provides a hydrophilic modified ceramsite filter material prepared by the method. According to the hydrophilic modified ceramsite filter material disclosed by the embodiment of the invention, the hydrophilic layer and the carbon source are not easy to fall off and are uniformly distributed, secondary pollution is avoided, the hydrophilic layer and the carbon source have stable and long-acting hydrophilicity and biocompatibility, the film-forming speed and the film-forming modulus of the surface of the filter material are effectively improved, nitrogen generated in the denitrification process is not easy to attach to the surface of the filter material, the nitrogen-expelling frequency can be effectively reduced, or the nitrogen-expelling step can be omitted, and the energy consumption is remarkably reduced.
In order to more clearly describe the embodiments of the present invention, several examples are provided below:
example 1
Firstly, pretreatment of ceramsite filter material
Selecting a porous ceramsite filter material with the particle size of 3-5mm, repeatedly washing the porous ceramsite filter material with tap water to remove pollutants on the surface of the filter material, and naturally drying the porous ceramsite filter material;
secondly, alkali liquor activation treatment
Putting 900ml of tap water into a heat-resistant and corrosion-resistant container, and adding 100g of sodium hydroxide flaky solid while stirring to prepare a strong alkali solution with the mass concentration of 10 wt%;
adding the pretreated ceramsite filter material into a prepared sodium hydroxide solution, soaking for 1.5h, taking out, and drying to obtain an alkali-treated surface-activated ceramsite filter material;
third, surface modification
Immersing the ceramsite subjected to surface activation treatment into a modified solution consisting of a polyethylene glycol 400 hydrophilic modifier and water-soluble starch, wherein the mass concentration of the polyethylene glycol 400 in the modified solution is 2wt%, the mass concentration of the water-soluble starch is 1wt%, keeping for 8min, taking out, and drying at 100 ℃ to obtain the hydrophilic ceramsite filter material, wherein the reaction mechanism is shown in fig. 1 and fig. 2.
The ceramsite filter material prepared by the embodiment is used for sewage treatment tests, and specifically comprises the following components: the denitrification deep-bed filter treatment unit is modified by adopting the standard improvement of a municipal sewage treatment plant, the ceramsite filter material prepared by the embodiment is put into the filter, the inlet water is the outlet water of the high-density sedimentation tank, the water temperature is more than 12 ℃, the inlet water quality is TN 15mg/L, SS 20mg/L, pH 6 and COD 25 mg/L.
In the sewage treatment process, the ceramsite filter material prepared by the embodiment is adopted, the membrane hanging time is 48 hours, the denitrification nitrogen-displacement frequency is 1 time/24 hours, the effluent quality is TN 9.32mg/L, the SS 8.66mg/L, the pH is 7, and the COD is 24.5 mg/L.
The ceramsite filter material prepared by the embodiment adopts a material with the strength of 90m3/m2H gas-washing Strength and 15m3/m2H washing intensity to wash the filter material alternately for one week, and testing the washed filter material by the method, wherein the quality of inlet water is not changedAnd changing the film forming time to 48h, the denitrification nitrogen displacement frequency to 1 time/24 h, the effluent quality TN to 9.83mg/L, the SS to 8.45mg/L, the pH to 7 and the COD to 24.34 mg/L. The hydrophilic layer and the carbon source grafted on the surface of the ceramsite filter material prepared by the embodiment are not easy to fall off, and the ceramsite filter material has good stability.
Example 2
Firstly, pretreatment of ceramsite filter material
Selecting a porous ceramsite filter material with the particle size of 3-5mm, repeatedly washing the porous ceramsite filter material with tap water to remove pollutants on the surface of the filter material, and naturally drying the porous ceramsite filter material;
secondly, alkali liquor activation treatment
Adding 920ml of tap water into a heat-resistant and corrosion-resistant container, and adding 80g of sodium hydroxide flaky solid while stirring to prepare strong alkali solution with the mass concentration of 8 wt%;
adding the pretreated ceramsite filter material into a prepared sodium hydroxide solution, soaking for 1h, taking out, and drying to obtain an alkali-treated surface-activated ceramsite filter material;
third, surface modification
Immersing the ceramsite subjected to surface activation treatment into a modified solution composed of a polyethylene glycol 800 hydrophilic modifier and chitosan, wherein the mass concentration of the polyethylene glycol 800 in the modified solution is 3wt%, the mass concentration of the chitosan is 0.5wt%, the pH value of the solution is adjusted to 5 by hydrochloric acid, keeping the solution for 10min, taking out the solution, and drying the solution at 100 ℃ to obtain a hydrophilic ceramsite filter material, and the reaction mechanism is shown in figures 1 and 3.
The ceramsite filter material prepared by the embodiment is subjected to a sewage treatment test by the same method as that in embodiment 1, the membrane hanging time is 55h, the denitrification nitrogen-displacement frequency is 1 time/24 h, the effluent quality is TN 9.97mg/L, the SS 8.15mg/L, the pH is 7, and the COD is 24.91 mg/L.
The ceramsite filter material prepared by the embodiment adopts a material with the strength of 90m3/m2H gas-wash Strength and 15m3/m2H, alternately washing the filter material by using the washing strength for one week, testing the washed filter material by using the method, wherein the water quality of inlet water is unchanged, the membrane hanging time is 55h, the denitrification nitrogen-expelling frequency is 1 time/24 h, the water quality of outlet water is TN 8.74mg/L, the SS is 8.33mg/L, the pH is 7, and the COD is COD24.69 mg/L. The hydrophilic layer and the carbon source grafted on the surface of the ceramsite filter material prepared by the embodiment are not easy to fall off, and the ceramsite filter material has good stability.
Comparative example 1
The ceramsite filter material which is not subjected to surface activation and modification treatment in the example 1 is tested by the same test method as the example 1, the membrane forming time is 168h, the denitrification nitrogen displacement frequency is 3 times/24 h, the effluent quality is TN 9.85mg/L, the SS 9.37mg/L, the pH is 7, and the COD is 26.2 mg/L.
Comparative example 2
The same procedure as in example 1 was followed, except that in the surface modification in the third step, no water-soluble starch was added and the mass concentration of polyethylene glycol 400 in the modification solution was 3%.
The ceramsite filter material prepared by the comparative example is tested by the same test method as in example 1, the membrane hanging time is 70 hours, the denitrification nitrogen-displacement frequency is 2 times/36 hours, the effluent quality is TN 9.91mg/L, the SS is 9.11mg/L, the pH is 7, and the COD is 27.63 mg/L.
Comparative example 3
The same procedure as in example 1 was followed, except that in the surface modification in the third step, polyethylene glycol 400 was not added, and the mass concentration of the water-soluble starch in the modification solution was 3%.
The ceramsite filter material prepared by the comparative example is tested by the same test method as in example 1, the membrane hanging time is 68 hours, the denitrification nitrogen-displacement frequency is 3 times/24 hours, the effluent quality TN is 8.98mg/L, the effluent quality SS is 8.67mg/L, the pH is 7, and the COD is 24.31 mg/L.
Comparative example 4
The same procedure as in example 1, except that step two was omitted and no lye activation treatment was carried out.
The ceramsite filter material prepared by the comparative example is tested by the same test method as that in example 1, the membrane forming time is 150h, the denitrification nitrogen removal frequency is 3 times/24 h, the effluent quality is TN 9.2mg/L, the SS is 9.46mg/L, the pH is 7, and the COD is 26.48 mg/L.
The ceramsite filter material prepared in the comparative example 4 has the strength of 90m3/m2H gas wash strengthDegree and 15m3/m2And h, alternately washing the filter material by using the washing strength for one week, and testing the washed filter material by using the method, wherein the water quality of inlet water is unchanged, the membrane hanging time is 168h, the denitrification nitrogen-expelling frequency is 3 times/24 h, the water quality of outlet water is TN 9.36mg/L, the SS is 9.42mg/L, the pH is 7, and the COD is 25.73 mg/L. Indicating that the hydrophilic layer has peeled off.
Finally, the invention adopts mature products and mature technical means in the prior art.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (10)

1. The preparation method of the hydrophilic modified ceramsite filter material is characterized by comprising the following steps of:
the method comprises the following steps: soaking the ceramsite filter material in a strong alkaline solution, and drying to obtain a ceramsite filter material with an activated surface;
step two: soaking the surface-activated ceramsite filter material obtained in the step one in a modification solution for modification, wherein the modification solution comprises a hydrophilic modifier and a carbon source;
step three: and (5) washing and drying the modified ceramsite filter material obtained in the step two to obtain the hydrophilic modified ceramsite filter material.
2. The method for preparing a hydrophilic modified ceramsite filter material according to claim 1, wherein in the first step, the ceramsite filter material is a ceramsite prepared by sintering argil containing silicon oxide, aluminum oxide, iron oxide, calcium oxide and magnesium oxide.
3. The preparation method of the hydrophilic modified ceramsite filter material according to claim 1, which is characterized by comprising the following steps of: in the first step, the strong alkali solution includes at least one of sodium hydroxide, potassium hydroxide or barium hydroxide.
4. The preparation method of the hydrophilic modified ceramsite filter material according to claim 1, wherein the preparation method comprises the following steps: in the first step, the mass concentration of the strong alkali solution is 2-15%.
5. The preparation method of the hydrophilic modified ceramsite filter material according to claim 1, which is characterized by comprising the following steps of: in the second step, polyethylene glycol is adopted as the hydrophilic modifier; the carbon source comprises at least one of chitosan, water-soluble starch or carboxymethyl cellulose.
6. The preparation method of the hydrophilic modified ceramsite filter material according to claim 5, wherein the preparation method comprises the following steps: in the second step, the polyethylene glycol includes at least one of polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 800, polyethylene glycol 1000, polyethylene glycol 2000, polyethylene glycol 5000, and polyethylene glycol 10000.
7. The method for preparing the hydrophilic modified ceramsite filter material according to claim 1, wherein the method comprises the following steps: in the modification solution used in the second step, the mass concentration of the hydrophilic modifier is 0.5-10%, and the mass concentration of the carbon source is 0.1-3%.
8. The method for preparing the hydrophilic modified ceramsite filter material according to claim 1, wherein the method comprises the following steps: in the first step, the ceramsite filter material is soaked in a strong alkali solution for 0.5-4 h.
9. The method for preparing the hydrophilic modified ceramsite filter material according to claim 1, wherein the method comprises the following steps: in the second step, the ceramsite filter material with the activated surface is placed in the modified solution for soaking for 1-15 min.
10. A ceramsite filter material prepared by the preparation method of the hydrophilic modified ceramsite filter material disclosed by claim 1, is characterized in that: the ceramsite filter material is prepared by the method of any one of claims 1-9.
CN202210707831.7A 2022-06-22 2022-06-22 Hydrophilic modified ceramsite filter material and preparation method thereof Active CN114772707B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4207227A (en) * 1976-12-03 1980-06-10 Bayer Aktiengesellschaft Stable suspensions of inorganic fillers in organic polyhydroxyl compounds
CN101157745A (en) * 2007-09-11 2008-04-09 浙江大学 Method for grafting polymer on inorganic material surface
CN104226230A (en) * 2013-06-18 2014-12-24 中国石油化工股份有限公司 Ceramsite filler and chemical modification method thereof
CN110420502A (en) * 2019-07-12 2019-11-08 兰州交通大学 The preparation method of the super hydrophilic underwater superoleophobic hard particles filtrate of Chitosan-coated

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4207227A (en) * 1976-12-03 1980-06-10 Bayer Aktiengesellschaft Stable suspensions of inorganic fillers in organic polyhydroxyl compounds
CN101157745A (en) * 2007-09-11 2008-04-09 浙江大学 Method for grafting polymer on inorganic material surface
CN104226230A (en) * 2013-06-18 2014-12-24 中国石油化工股份有限公司 Ceramsite filler and chemical modification method thereof
CN110420502A (en) * 2019-07-12 2019-11-08 兰州交通大学 The preparation method of the super hydrophilic underwater superoleophobic hard particles filtrate of Chitosan-coated

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