CN108545995B - Method for preparing bionic ecological building material by treating mud flat sludge - Google Patents
Method for preparing bionic ecological building material by treating mud flat sludge Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/06—Acrylates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/45—Form not covered by groups C05G5/10 - C05G5/18, C05G5/20 - C05G5/27, C05G5/30 - C05G5/38 or C05G5/40, e.g. soluble or permeable packaging
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00758—Uses not provided for elsewhere in C04B2111/00 for agri-, sylvi- or piscicultural or cattle-breeding applications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/74—Underwater applications
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- Chemical & Material Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to a preparation method of a bionic ecological building material, in particular to a method for preparing the bionic ecological building material by treating mud flat sludge, which comprises the following steps: s1, pretreatment of mud flat sludge: collecting sludge deposited in the mudflat area, screening out impurities in the sludge, adding a proper amount of hydrogen peroxide, fully stirring and reacting for 30-45min, and oxidizing and decomposing unstable organic matter components in the sludge; s2: loading an ordered mesoporous medium: adding a certain amount of organic bentonite and an ordered mesoporous medium into the mudflat sludge treated in the step S1, fully stirring for 1-2h, uniformly mixing, and then carrying out ultrasonic degassing; s3: drying: placing the material obtained in the step S2 in a dryer, drying the material at the temperature of 80-105 ℃ until the water content is 0.1-1%, crushing the dried sludge, and sieving the crushed sludge through a 100-fold 120-mesh sieve to obtain fine sludge powder; s4: compounding: and uniformly mixing the fine mud powder with a certain amount of sodium polyacrylate, crosslinked polyacrylic resin, non-ionic polyacrylamide and a crosslinking agent to obtain a finished product of the bionic ecological building material.
Description
Technical Field
The invention relates to a preparation method of a bionic ecological building material, in particular to a method for preparing the bionic ecological building material by treating mud flat sludge.
Background
China has a broad coastline and has abundant mudflat sludge resources containing a large amount of nutrient substances. Besides being used for cultivating mudflat shellfish and the like, the mud-sand mudflat has a large amount of deposited mud-sand which is difficult to be utilized. For a long time, the method has certain negative effects on the natural landscape and the ecological environment of the surrounding sea area. The engineering characteristics of the sludge are poor, mainly manifested by high water content, large compressibility, low strength, poor stability, low bearing capacity, slow drainage consolidation, soft plastic to flow plastic state and the like, and the fundamental reason is the high water content. If the water content in the sludge can be reduced, the compressibility of the sludge is obviously reduced, and the strength of the sludge is obviously improved.
The mud flat sediment sludge is rich in a large amount of nutrient substances, and if organic matters such as nitrogen, phosphorus and the like in the mud flat sediment sludge are effectively combined with the proliferation process of marine organisms, the mud flat sediment sludge is certainly helpful for accelerating the construction process of the bionic ecological facility. However, the raw materials for preparing the bionic ecological facility building materials in China still mainly comprise concrete, rock block and the like, and the application research of the mudflat sludge in the preparation of the bionic ecological building materials is very little. The invention aims to solve the technical problem and provides a method for preparing a bionic ecological building material by treating mud flat sludge.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a method for preparing a bionic ecological building material by treating mudflat sludge.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the method for preparing the bionic ecological building material by treating the mudflat sludge comprises the following steps:
s1, pretreatment of mud flat sludge:
collecting sludge deposited in the mudflat area, screening out impurities in the sludge, adding a proper amount of hydrogen peroxide, fully stirring and reacting for 30-45min, and oxidizing and decomposing unstable organic matter components in the sludge;
s2: loading an ordered mesoporous medium:
adding a certain amount of organic bentonite and an ordered mesoporous medium into the mudflat sludge treated in the step S1, fully stirring for 1-2h, uniformly mixing, and then carrying out ultrasonic degassing;
s3: drying:
placing the material obtained in the step S2 in a dryer, drying the material at the temperature of 80-105 ℃ until the water content is 0.1-1%, crushing the dried sludge, and sieving the crushed sludge through a 100-fold 120-mesh sieve to obtain fine sludge powder;
s4: compounding:
and uniformly mixing the fine mud powder with a certain amount of sodium polyacrylate, crosslinked polyacrylic resin, non-ionic polyacrylamide and a crosslinking agent to obtain a finished product of the bionic ecological building material.
Preferably, in step S2, the ordered mesoporous medium is magnetic ordered mesoporous carbon or a mixture of magnetic ordered mesoporous carbon and magnetic ordered mesoporous nickel ferrite at a mass ratio of 5-8: 1;
the addition amount of the organic bentonite is 1-3% of the mass of the mud flat sludge; the adding amount of the ordered mesoporous medium is 1-2% of the mass of the mud flat sludge.
Preferably, in step S4, the fine powder, the sodium polyacrylate, the crosslinked polyacrylic resin, the non-ionic polyacrylamide and the crosslinking agent are as follows in parts by weight:
80-100 parts of fine mud powder
5-15 parts of sodium polyacrylate
1-20 parts of crosslinked polyacrylic resin
4-20 parts of nonionic polyacrylamide
0.5-20 parts of cross-linking agent
The cross-linking agent is dihydroxyaluminum aminoacetate.
Preferably, in step S4, the fine powder, the sodium polyacrylate, the crosslinked polyacrylic resin, the non-ionic polyacrylamide and the crosslinking agent are as follows in parts by weight:
100 portions of fine mud powder
10 portions of sodium polyacrylate
10 portions of crosslinked polyacrylic resin
10 parts of nonionic polyacrylamide
5 parts of a crosslinking agent.
Preferably, in the step S1, the addition amount of the hydrogen peroxide is 5-6% of the mass of the mudflat sludge, and the mass concentration of the hydrogen peroxide is 20-30%.
Preferably, in step S1, after the oxidation pretreatment, water-insoluble glucan in an amount of 2 to 3% by mass of the mudflat sludge is further added for flocculation, and the specific operations are as follows:
after the oxidation treatment is finished, adding water-insoluble glucan, uniformly stirring, standing for 24-36h, removing mudflat sludge of the upper layer 1/4/-1/3 for application in the next batch, and treating the lower layer 2/3-3/4 mudflat sludge in the step S2.
The invention has the beneficial effects that: the raw material adopted by the invention is coastal mud flat sludge, the sludge has simple components, low organic matter content, much less loss on ignition than urban sludge, and larger proportion of the raw material, and the bionic ecological building material prepared by reasonable proportion has the advantages of porosity and nutrient slow release performance, and is beneficial to the enrichment of algae plants. In addition, the bionic ecological building material provided by the invention can be expanded into gel when meeting water, has good water gathering and locking effects, and organic matters are gradually dissolved in water and slowly released or diffused, so that the adhesion and growth of seaweed are facilitated.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of specific examples.
Example 1:
the method for preparing the bionic ecological building material by treating the mudflat sludge comprises the following steps:
s1, pretreatment of mud flat sludge:
collecting sludge deposited in the mudflat area, screening out impurities in the sludge, adding a proper amount of hydrogen peroxide, fully stirring and reacting for 30min, and oxidizing and decomposing unstable organic matter components in the sludge;
s2: loading an ordered mesoporous medium:
adding a certain amount of organic bentonite and an ordered mesoporous medium into the mudflat sludge treated in the step S1, fully stirring for 1 hour, uniformly mixing, and then carrying out ultrasonic degassing;
s3: drying:
putting the material obtained in the step S2 into a dryer, drying the material at 80 ℃ until the water content is 1%, crushing the dried sludge, and sieving the crushed sludge with a 100-mesh sieve to obtain fine sludge powder;
s4: compounding:
and uniformly mixing the fine mud powder with a certain amount of sodium polyacrylate, crosslinked polyacrylic resin, non-ionic polyacrylamide and a crosslinking agent to obtain a finished product of the bionic ecological building material.
Specifically, in step S2, the ordered mesoporous medium is magnetic ordered mesoporous carbon;
the addition amount of the organic bentonite is 1 percent of the mass of the mud flat sludge; the adding amount of the ordered mesoporous medium is 1 percent of the mass of the mud flat sludge.
In step S4, the fine mud powder, the sodium polyacrylate, the crosslinked polyacrylic resin, the non-ionic polyacrylamide and the crosslinking agent are composed of the following components in parts by weight:
80 portions of fine mud powder
5 parts of sodium polyacrylate
Crosslinked polyacrylic resin 1 part
4 parts of nonionic polyacrylamide
0.5 part of cross-linking agent
The cross-linking agent is dihydroxyaluminum aminoacetate.
In step S1 of this embodiment, the addition amount of the hydrogen peroxide is 5% by mass of the mudflat sludge, and the mass concentration of the hydrogen peroxide is 30%.
In addition, in step S1, after the oxidation pretreatment, water-insoluble glucan in an amount of 2% by mass of the mudflat sludge is added for flocculation, and the specific operations are as follows:
and after the oxidation treatment is finished, adding water-insoluble glucan, uniformly stirring, standing for 24h, removing the mudflat sludge on the upper layer 1/4 for the next batch, and performing the step S2 on the mudflat sludge on the lower layer 3/4.
Example 2
The method for preparing the bionic ecological building material by treating the mudflat sludge comprises the following steps:
s1, pretreatment of mud flat sludge:
collecting sludge deposited in the mudflat area, screening out impurities in the sludge, adding a proper amount of hydrogen peroxide, fully stirring and reacting for 45min, and oxidizing and decomposing unstable organic matter components in the sludge;
s2: loading an ordered mesoporous medium:
adding a certain amount of organic bentonite and an ordered mesoporous medium into the mudflat sludge treated in the step S1, fully stirring for 2 hours, uniformly mixing, and then carrying out ultrasonic degassing;
s3: drying:
putting the material obtained in the step S2 into a dryer, drying at 105 ℃ until the water content is 0.1%, crushing the dried sludge, and sieving with a 120-mesh sieve to obtain fine sludge powder;
s4: compounding:
and uniformly mixing the fine mud powder with a certain amount of sodium polyacrylate, crosslinked polyacrylic resin, non-ionic polyacrylamide and a crosslinking agent to obtain a finished product of the bionic ecological building material.
In this embodiment, in step S2, the ordered mesoporous medium is a mixture of magnetic ordered mesoporous carbon and magnetic ordered mesoporous nickel ferrite at a mass ratio of 5: 1;
the addition amount of the organic bentonite is 3 percent of the mass of the mud flat sludge; the adding amount of the ordered mesoporous medium is 2 percent of the mass of the mud flat sludge.
In step S4, the fine mud powder, the sodium polyacrylate, the crosslinked polyacrylic resin, the non-ionic polyacrylamide and the crosslinking agent are composed of the following components in parts by weight:
100 portions of fine mud powder
15 portions of sodium polyacrylate
20 parts of crosslinked polyacrylic resin
20 parts of nonionic polyacrylamide
20 portions of cross-linking agent
The cross-linking agent is dihydroxyaluminum aminoacetate.
In step S1, the addition amount of hydrogen peroxide is 6% of the mass of the mudflat sludge, and the mass concentration of hydrogen peroxide is 20%.
In addition, in step S1, after the oxidation pretreatment, adding water-insoluble glucan in an amount of 3% by mass of the mudflat sludge for flocculation, specifically:
and after the oxidation treatment is finished, adding water-insoluble glucan, uniformly stirring, standing for 36h, removing the mudflat sludge of the upper layer 1/3 for the next batch, and treating the lower layer 2/3 mudflat sludge in the step S2.
Example 3
The method for preparing the bionic ecological building material by treating the mudflat sludge comprises the following steps:
s1, pretreatment of mud flat sludge:
collecting sludge deposited in the mudflat area, screening out impurities in the sludge, adding a proper amount of hydrogen peroxide, fully stirring and reacting for 40min, and oxidizing and decomposing unstable organic matter components in the sludge;
s2: loading an ordered mesoporous medium:
adding a certain amount of organic bentonite and an ordered mesoporous medium into the mudflat sludge treated in the step S1, fully stirring for 1.5h, uniformly mixing, and then carrying out ultrasonic degassing;
s3: drying:
putting the material obtained in the step S2 into a dryer, drying at 100 ℃ until the water content is 0.6%, crushing the dried sludge, and sieving by a 110-mesh sieve to obtain fine sludge powder;
s4: compounding:
and uniformly mixing the fine mud powder with a certain amount of sodium polyacrylate, crosslinked polyacrylic resin, non-ionic polyacrylamide and a crosslinking agent to obtain a finished product of the bionic ecological building material.
In this embodiment, in step S2, the ordered mesoporous medium is a mixture of magnetic ordered mesoporous carbon and magnetic ordered mesoporous nickel ferrite at a mass ratio of 8: 1;
the addition amount of the organic bentonite is 2 percent of the mass of the mud flat sludge; the adding amount of the ordered mesoporous medium is 1.5 percent of the mass of the mud flat sludge.
In step S4, the fine mud powder, the sodium polyacrylate, the crosslinked polyacrylic resin, the non-ionic polyacrylamide and the crosslinking agent are composed of the following components in parts by weight:
100 portions of fine mud powder
10 portions of sodium polyacrylate
10 portions of crosslinked polyacrylic resin
10 parts of nonionic polyacrylamide
5 parts of a crosslinking agent.
In step S1, the addition amount of hydrogen peroxide is 5% by mass of the mudflat sludge, and the mass concentration of hydrogen peroxide is 25%.
In step S1, after the oxidation pretreatment, water-insoluble glucan having a mass of 2.5% of the mudflat sludge is added for flocculation, and the specific operations are as follows:
and after the oxidation treatment is finished, adding water-insoluble glucan, uniformly stirring, standing for 30h, removing the mudflat sludge of the upper layer 1/3 for the next batch, and treating the lower layer 2/3 mudflat sludge in the step S2.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (4)
1. The method for preparing the bionic ecological building material by treating mud flat sludge is characterized by comprising the following steps: the method comprises the following steps:
s1, pretreatment of mud flat sludge:
collecting sludge deposited in the mudflat area, screening out impurities in the sludge, adding a proper amount of hydrogen peroxide, fully stirring and reacting for 30-45min, and oxidizing and decomposing unstable organic matter components in the sludge;
s2: loading an ordered mesoporous medium:
adding a certain amount of organic bentonite and an ordered mesoporous medium into the mudflat sludge treated in the step S1, fully stirring for 1-2h, uniformly mixing, and then carrying out ultrasonic degassing; the ordered mesoporous medium is magnetic ordered mesoporous carbon or a mixture of the magnetic ordered mesoporous carbon and the magnetic ordered mesoporous nickel ferrite according to the mass ratio of 5-8: 1;
the addition amount of the organic bentonite is 1-3% of the mass of the mud flat sludge; the adding amount of the ordered mesoporous medium is 1-2% of the mass of the mud flat sludge;
s3: drying:
placing the material obtained in the step S2 in a dryer, drying the material at the temperature of 80-105 ℃ until the water content is 0.1-1%, crushing the dried sludge, and sieving the crushed sludge through a 100-fold 120-mesh sieve to obtain fine sludge powder;
s4: compounding:
uniformly mixing the fine mud powder with a certain amount of sodium polyacrylate, crosslinked polyacrylic resin, non-ionic polyacrylamide and a crosslinking agent to prepare a finished product of the bionic ecological building material; the components in parts by weight of the fine mud powder, the sodium polyacrylate, the crosslinked polyacrylic resin, the non-ionic polyacrylamide and the crosslinking agent are as follows:
80-100 parts of fine mud powder
5-15 parts of sodium polyacrylate
1-20 parts of crosslinked polyacrylic resin
4-20 parts of nonionic polyacrylamide
0.5-20 parts of cross-linking agent
The cross-linking agent is dihydroxyaluminum aminoacetate.
2. The method for preparing the bionic ecological building material by treating the mudflat sludge according to claim 1, which is characterized by comprising the following steps:
100 portions of fine mud powder
10 portions of sodium polyacrylate
10 portions of crosslinked polyacrylic resin
10 parts of nonionic polyacrylamide
5 parts of a crosslinking agent.
3. The method for preparing the bionic ecological building material by treating the mudflat sludge according to claim 1, which is characterized by comprising the following steps:
in the step S1, the addition amount of the hydrogen peroxide is 5-6% of the mass of the mudflat sludge, and the mass concentration of the hydrogen peroxide is 20-30%.
4. The method for preparing the bionic ecological building material by treating the mudflat sludge according to claim 3, which is characterized by comprising the following steps: in step S1, after the oxidation pretreatment, adding water-insoluble glucan which accounts for 2-3% of the mass of the mudflat sludge for flocculation treatment, and the specific operation is as follows:
after the oxidation treatment is finished, adding water-insoluble glucan, uniformly stirring, standing for 24-36h, removing mudflat sludge of the upper layer 1/4/-1/3 for application in the next batch, and treating the lower layer 2/3-3/4 mudflat sludge in the step S2.
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| CN115488132A (en) * | 2022-09-28 | 2022-12-20 | 中国科学院武汉岩土力学研究所 | Solidification improvement method for high-water-content organic-matter-rich sludge engineering muck and application |
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| US7575685B2 (en) * | 2000-11-10 | 2009-08-18 | Bion Technologies, Inc. | Low oxygen biologically mediated nutrient removal |
| CN102675541B (en) * | 2011-12-16 | 2014-11-05 | 河南科技大学 | Sodium polyacrylate/polyacrylamide composite moisture-absorption resin and preparation method thereof |
| CN107032517B (en) * | 2016-11-30 | 2019-10-25 | 国家海洋局第二海洋研究所 | The method that modified coral sand is used for Island engineering Water warfare |
| CN106746981A (en) * | 2016-12-08 | 2017-05-31 | 陕西易阳科技有限公司 | A kind of method that utilization mudflat sludge prepares artificial algal reef |
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