CN112028582A - Vertical anti-seepage isolation ecological barrier material for polluted site and preparation method thereof - Google Patents
Vertical anti-seepage isolation ecological barrier material for polluted site and preparation method thereof Download PDFInfo
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- 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
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Abstract
The invention relates to a vertical anti-seepage isolation ecological barrier material for a polluted site and a preparation method thereof, wherein the method comprises the steps of grinding a mixture of bentonite, kaolin and attapulgite, and dispersing the ground mixture in water to obtain a first mixed slurry; adding sodium carbonate, sodium silicate and sodium dodecyl sulfate into the first mixed slurry, stirring and standing to obtain a second mixed slurry; adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the second mixed slurry, and stirring to obtain a third mixed slurry; the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum are ground and then added into the third mixed slurry, the vertical anti-seepage isolation ecological barrier material for the polluted site is obtained after stirring, the potential gelling activity of industrial solid wastes is excited by adopting a chemical mode, the industrial solid wastes are fully hydrated in the bentonite slurry, and a compact solidified body with a small permeability coefficient is formed by gelling and hardening.
Description
Technical Field
The invention relates to the technical field of environmental geotechnical engineering, in particular to a vertical anti-seepage isolation ecological barrier material for a polluted site and a preparation method thereof.
Background
30 hundred million tons of general industrial solid wastes, 5000 more than ten thousand tons of industrial hazardous wastes and 4 hundred million tons of domestic wastes are generated annually in China, sanitary landfill is still the most main treatment mode of urban and industrial solid wastes in China, 5 million solid waste landfill sites are generated, and the solid waste landfill and stockpiling quantity is up to 270 more than one hundred million tons. Under the action of rainwater, seepage and the like, a large amount of toxic and harmful heavy metals and organic pollutants in the landfill and stockpiling solid waste are gradually leached out and greatly diffused towards peripheral soil and water, so that the serious pollution to the surrounding ecological environment is caused. Therefore, in-situ impermeable isolation barrier measures must be taken to safely seal the contaminated area for a long period of time, and to stop the migration of contaminants in the area to the surrounding environment.
The impervious partition wall is the most common and effective vertical sealing technology for the polluted site for limiting the horizontal migration of pollutants at present. The materials used can be classified into soil-bentonite separation walls, cement-bentonite separation walls, geomembrane-bentonite composite walls, cement-soil mixed pile walls, grouting curtain walls, steel sheet pile walls, plastic concrete walls, and the like. The soil-bentonite separation wall has poor chemical compatibility and is easily influenced by chemical erosion and pollutants, the geomembrane-bentonite composite wall and the steel sheet pile wall have complex construction process and high construction cost, and simultaneously have the durability problems of aging, corrosion and the like, the other cement-based separation walls have simple and convenient construction and easily obtained raw materials, but have generally large permeability coefficient which is 10 DEG-5cm/s～10-6cm/s, the requirement that the material of the isolation wall for the polluted site cannot be less than 10-7The requirement of cm/s. The invention patents of the publication numbers CN 103030350A and CN 109704685A, namely 'a refuse landfill separation wall seepage-proofing slurry and a preparation method' and 'refuse landfill seepage-proofing slurry and a preparation method based on sodium carboxymethyl cellulose modification', although the invention patents meet the requirement of low permeability coefficient and have the advantages of low permeability coefficientThe preparation method has high pollutant retarding capacity, but relates to the use of a large amount of high-environmental load materials, namely portland cement, and simultaneously needs various organic high polymer materials, such as sodium carboxymethyl cellulose, polycarboxylic acid high-performance water reducing agent, cellosilk, naphthalene high-concentration high-efficiency water reducing agent and the like, so that the preparation process is complicated, the cost is high, and the environmental load is large.
Disclosure of Invention
In view of the above, there is a need to provide a vertical anti-seepage isolation ecological barrier material for a polluted site and a preparation method thereof, so as to solve the problems of complicated preparation process, high cost and large environmental load of the existing anti-seepage isolation wall.
The invention provides a preparation method of a vertical anti-seepage isolation ecological barrier material for a polluted site, which comprises the following steps:
grinding a mixture of bentonite, kaolin and attapulgite, and dispersing the mixture in water to obtain a first mixed slurry;
adding sodium carbonate, sodium silicate and sodium dodecyl sulfate into the first mixed slurry, stirring and standing to obtain a second mixed slurry;
adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the second mixed slurry, and stirring to obtain a third mixed slurry;
and grinding the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum, adding into the third mixed slurry, and stirring to obtain the vertical anti-seepage isolation ecological barrier material for the polluted site.
Optionally, the bentonite, the kaolin and the attapulgite are in parts by weight: 30-60 parts of bentonite, 20-40 parts of kaolin and 5-20 parts of attapulgite.
Optionally, the sodium carbonate, the sodium silicate and the sodium dodecyl sulfate are as follows in parts: 3-8 parts of sodium carbonate, 2-6 parts of sodium silicate and 1-5 parts of sodium dodecyl sulfate.
Optionally, the parts ratio of the sodium hydroxide, the sodium sulfate, the magnesium oxide, the calcium oxide and the calcium sulfate is as follows: 5-10 parts of sodium hydroxide, 2-6 parts of sodium sulfate, 10-20 parts of magnesium oxide, 10-20 parts of calcium oxide and 5-25 parts of calcium sulfate.
Optionally, the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum are in parts by weight: 20-50 parts of blast furnace slag, 20-30 parts of fly ash, 10-20 parts of red mud, 5-15 parts of mine tailings and 10-30 parts of phosphogypsum.
Optionally, grinding a mixture of bentonite, kaolin and attapulgite, and dispersing the ground mixture in water to obtain a first mixed slurry, which specifically comprises:
grinding bentonite, kaolin and attapulgite in a ball mill to obtain a first ground material;
passing the first ground substance through a square hole sieve with the particle size of 75 mu m to obtain a first ground substance with the particle size of less than 75 mu m;
and mixing the ground material with the granularity of less than 75 microns and water according to the mass ratio of 1: 10-1: 20, and stirring and dispersing to obtain first mixed slurry.
Optionally, sodium carbonate, sodium silicate and sodium dodecyl sulfate are added into the first mixed slurry, and the second mixed slurry is obtained by stirring and standing at a stirring speed of 2000r/min for 10min and 24 h.
Optionally, adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the second mixed slurry, and stirring to obtain a third mixed slurry specifically including:
firstly, stirring the second mixed slurry at a stirring speed of 1000r/min for 5min to ensure that the second mixed slurry is uniformly dispersed again;
and adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the re-dispersed uniformly second mixed slurry, and stirring again to obtain a third mixed slurry, wherein the stirring speed is 2000r/min, and the stirring time is 10 min.
Optionally, the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum are ground and added into the third mixed slurry, and the vertical anti-seepage isolation ecological barrier material for the polluted site obtained after stirring specifically comprises:
grinding the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum in a ball mill at the grinding speed of 400r/min for 6-12 h to obtain a second ground material;
and adding the second ground powder into the third mixed slurry, and stirring at the stirring speed of 3000r/min for 15min to obtain the vertical anti-seepage isolation ecological barrier material for the polluted site.
The invention also provides a vertical anti-seepage isolation ecological barrier material for the polluted site, which is prepared from the following raw materials in parts by weight:
the invention has the beneficial effects that:
the chemical method adopted by the invention stimulates the potential gelling activity of industrial solid wastes, so that the industrial solid wastes are fully hydrated in the bentonite slurry, and the gelling and hardening are carried out to form a compact solidified body with small permeability coefficient. The method is characterized in that bentonite, kaolin and attapulgite which are adopted are layered aluminosilicate minerals, a large amount of free water can be contained to enter an interlayer structure, uniform self-dispersed clay mineral slurry can be formed in water, sodium carbonate, sodium silicate and sodium dodecyl sulfate are added to modify the clay mineral slurry appropriately, the interlayer spacing of the clay mineral is increased, the dispersibility and stability of the clay mineral slurry are further improved, then sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate are added to serve as chemical exciting agents, and the method has the advantage that the chemical exciting agents have excellent potential gelling activity exciting effects on industrial solid wastes mainly comprising blast furnace slag and fly ash. In addition, because the red mud has stronger alkalinity, the addition of the red mud can ensure the high pH value of an excitation environment, partial aluminum active raw materials can be provided, the phosphogypsum can be used as a chemical excitant, has a certain activity excitation effect on blast furnace slag and fly ash, the addition of the phosphogypsum can reduce the addition of the chemical excitant, in addition, the addition of a proper amount of mine tailings has the micro-aggregate effect and the skeleton effect, and can enhance the strength of mixed slurry and reduce the volume change caused in the excitation process. The vertical anti-seepage isolation ecological barrier material for the polluted site is simple to prepare, easy to prepare and use in a construction site, ecological, environment-friendly and low in cost, forms a polluted site characteristic treatment mode of treating wastes with processes of wastes against one another, realizes effective coupling of resource recycling of industrial solid wastes and environmental treatment, has a large ecological environmental effect and social and economic benefits, and has a huge market potential and a wide engineering application prospect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a method flow chart of a first embodiment of the preparation method of the vertical anti-seepage isolation ecological barrier material for the polluted site provided by the invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Example one
Referring to fig. 1, the embodiment of the invention discloses a preparation method of a vertical impermeable isolation ecological barrier material for a polluted site, which comprises the following steps:
s01, grinding the mixture of bentonite, kaolin and attapulgite, and dispersing the mixture in water to obtain a first mixed slurry; in step S01, the ratio of bentonite, kaolin and attapulgite in parts is: 30-60 parts of bentonite, 20-40 parts of kaolin and 5-20 parts of attapulgite. Firstly, grinding bentonite, kaolin and attapulgite in a ball mill at the rotation speed of 200r/min for 4 hours to obtain a first ground material; the first powder grinding material has large and small particles, and proper particles can be selected as the next step material after the first powder grinding material is screened; then the first ground material passes through a square hole sieve with the particle size of 75 mu m to obtain first ground material with the particle size of less than 75 mu m; and then, mixing the ground material with the granularity of less than 75 mu m and water according to the mass ratio of 1: 10-1: 20, stirring and dispersing, wherein the stirring and dispersing can be carried out in a high-speed stirring device, and stirring is carried out for 5 minutes at the stirring speed of 1000r/min to obtain first mixed slurry.
S02, adding sodium carbonate, sodium silicate and sodium dodecyl sulfate into the first mixed slurry, stirring and standing to obtain a second mixed slurry; in step S02, the sodium carbonate, the sodium silicate and the sodium dodecyl sulfate are in parts by weight: 3-8 parts of sodium carbonate, 2-6 parts of sodium silicate and 1-5 parts of sodium dodecyl sulfate. And adding sodium carbonate, sodium silicate and sodium dodecyl sulfate into the first mixed slurry, stirring, standing to obtain a second mixed slurry, wherein the stirring speed of the second mixed slurry is 2000r/min, the stirring time is 10min, the standing time is 24h, and the second mixed slurry can be obtained after standing.
S03, adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the second mixed slurry, and stirring to obtain a third mixed slurry; in step S03, the parts ratio of sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate is: 5-10 parts of sodium hydroxide, 2-6 parts of sodium sulfate, 10-20 parts of magnesium oxide, 10-20 parts of calcium oxide and 5-25 parts of calcium sulfate. Adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the second mixed slurry, and stirring to obtain a third mixed slurry, wherein the specific steps of stirring the second mixed slurry at a stirring speed of 1000r/min for 5min to re-disperse the second mixed slurry uniformly; and adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the re-uniformly dispersed second mixed slurry, and uniformly dispersing the second mixed slurry, the sodium hydroxide, the sodium sulfate, the magnesium oxide, the calcium oxide and the calcium sulfate at a stirring speed of 2000r/min and a stirring time of 5min to obtain a third mixed slurry.
And S04, grinding the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum, adding into the third mixed slurry, and stirring to obtain the vertical anti-seepage isolation ecological barrier material for the polluted site. In step S04, the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum are in parts by weight: 20-50 parts of blast furnace slag, 20-30 parts of fly ash, 10-20 parts of red mud, 5-15 parts of mine tailings and 10-30 parts of phosphogypsum. Firstly, grinding blast furnace slag, fly ash, red mud, mine tailings and phosphogypsum in a ball mill at the grinding speed of 400r/min for 6-12 h to obtain a second ground substance; and adding the second ground powder into the third mixed slurry for stirring at the stirring speed of 3000r/min for 15min to obtain the vertical anti-seepage isolation ecological barrier material for the polluted site.
The embodiment of the invention also provides a vertical anti-seepage isolation ecological barrier material for the polluted site, which is prepared from the following raw materials in parts by weight: 30-60 parts of bentonite, 20-40 parts of kaolin, 5-20 parts of attapulgite, 3-8 parts of sodium carbonate, 2-6 parts of sodium silicate, 1-5 parts of sodium dodecyl sulfate, 5-10 parts of sodium hydroxide, 2-6 parts of sodium sulfate, 10-20 parts of magnesium oxide, 10-20 parts of calcium oxide, 5-25 parts of calcium sulfate, 20-50 parts of blast furnace slag, 20-30 parts of fly ash, 10-20 parts of red mud, 5-15 parts of mine tailings and 10-30 parts of phosphogypsum.
Example two
As another embodiment of the present invention, in this embodiment, a method for preparing a vertical impermeable isolation ecological barrier material for a contaminated site is specifically provided, which includes the following steps:
s01, grinding the mixture of bentonite, kaolin and attapulgite, and dispersing the mixture in water to obtain a first mixed slurry; in step S01, the ratio of bentonite, kaolin and attapulgite in parts is: 50 parts of bentonite, 35 parts of kaolin and 15 parts of attapulgite. Firstly, grinding bentonite, kaolin and attapulgite in a ball mill at the rotation speed of 200r/min for 4 hours to obtain a first ground material; the first powder grinding material has large and small particles, and proper particles can be selected as the next step material after the first powder grinding material is screened; then the first ground material passes through a square hole sieve with the particle size of 75 mu m to obtain first ground material with the particle size of less than 75 mu m; and then, mixing the ground material with the granularity of less than 75 mu m and water according to the mass ratio of 1:12, stirring and dispersing, wherein the stirring and dispersing can be carried out in a high-speed stirring device, and stirring for 5 minutes at the stirring speed of 1000r/min to obtain first mixed slurry.
S02, adding sodium carbonate, sodium silicate and sodium dodecyl sulfate into the first mixed slurry, stirring and standing to obtain a second mixed slurry; in step S02, the sodium carbonate, the sodium silicate and the sodium dodecyl sulfate are in parts by weight: 5 parts of sodium carbonate, 2 parts of sodium silicate and 1 part of sodium dodecyl sulfate. And adding sodium carbonate, sodium silicate and sodium dodecyl sulfate into the first mixed slurry, stirring, standing to obtain a second mixed slurry, wherein the stirring speed of the second mixed slurry is 2000r/min, the stirring time is 10min, the standing time is 24h, and the second mixed slurry can be obtained after standing.
S03, adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the second mixed slurry, and stirring to obtain a third mixed slurry; in step S03, the parts ratio of sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate is: 6 parts of sodium hydroxide, 3 parts of sodium sulfate, 15 parts of magnesium oxide, 10 parts of calcium oxide and 10 parts of calcium sulfate. Adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the second mixed slurry, and stirring to obtain a third mixed slurry, wherein the specific steps of stirring the second mixed slurry at a stirring speed of 1000r/min for 5min to re-disperse the second mixed slurry uniformly; and adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the re-uniformly dispersed second mixed slurry, and uniformly dispersing the second mixed slurry, the sodium hydroxide, the sodium sulfate, the magnesium oxide, the calcium oxide and the calcium sulfate at a stirring speed of 2000r/min and a stirring time of 5min to obtain a third mixed slurry.
And S04, grinding the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum, adding into the third mixed slurry, and stirring to obtain the vertical anti-seepage isolation ecological barrier material for the polluted site. In step S04, the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum are in parts by weight: 40 parts of blast furnace slag, 25 parts of fly ash, 10 parts of red mud, 10 parts of mine tailings and 15 parts of phosphogypsum. Firstly, grinding blast furnace slag, fly ash, red mud, mine tailings and phosphogypsum in a ball mill at the grinding speed of 400r/min for 8 hours to obtain a second ground substance; and adding the second ground powder into the third mixed slurry for stirring at the stirring speed of 3000r/min for 15min to obtain the vertical anti-seepage isolation ecological barrier material for the polluted site.
EXAMPLE III
As another embodiment of the present invention, different from the second embodiment, in step S01 of the present embodiment, the part ratio of bentonite, kaolin and attapulgite is: 40 parts of bentonite, 40 parts of kaolin and 20 parts of attapulgite; and the mass ratio of the ground material with the granularity of less than 75 mu m to the water is 1: 15. In step S02 of this embodiment, the sodium carbonate, the sodium silicate and the sodium dodecyl sulfate are in parts by weight: 5 parts of sodium carbonate, 2 parts of sodium silicate and 1 part of sodium dodecyl sulfate. In step S03 of this embodiment, the parts ratio of the sodium hydroxide, the sodium sulfate, the magnesium oxide, the calcium oxide, and the calcium sulfate is: 8 parts of sodium hydroxide, 3 parts of sodium sulfate, 20 parts of magnesium oxide, 10 parts of calcium oxide and 8 parts of calcium sulfate. In step S04, the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum are in parts by weight: 25 parts of blast furnace slag, 30 parts of fly ash, 15 parts of red mud, 15 parts of mine tailings and 15 parts of phosphogypsum.
Example four
As another embodiment of the present invention, different from the second embodiment, in step S01 of the present embodiment, the part ratio of bentonite, kaolin and attapulgite is: 60 parts of bentonite, 30 parts of kaolin and 10 parts of attapulgite; and the mass ratio of the ground powder with the granularity of less than 75 mu m to the water is 1: 16. In step S02 of this embodiment, the sodium carbonate, the sodium silicate and the sodium dodecyl sulfate are in parts by weight: 3 parts of sodium carbonate, 6 parts of sodium silicate and 4 parts of sodium dodecyl sulfate. In step S03 of this embodiment, the parts ratio of the sodium hydroxide, the sodium sulfate, the magnesium oxide, the calcium oxide, and the calcium sulfate is: 7 parts of sodium hydroxide, 4 parts of sodium sulfate, 10 parts of magnesium oxide, 15 parts of calcium oxide and 12 parts of calcium sulfate. In step S04, the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum are in parts by weight: 35 parts of blast furnace slag, 30 parts of fly ash, 20 parts of red mud, 5 parts of mine tailings and 10 parts of phosphogypsum.
EXAMPLE five
As another embodiment of the present invention, different from the second embodiment, in step S01 of the present embodiment, the part ratio of bentonite, kaolin and attapulgite is: 55 parts of bentonite, 40 parts of kaolin and 5 parts of attapulgite; and the mass ratio of the ground material with the granularity of less than 75 mu m to the water is 1: 15. In step S02 of this embodiment, the sodium carbonate, the sodium silicate and the sodium dodecyl sulfate are in parts by weight: 3 parts of sodium carbonate, 3 parts of sodium silicate and 5 parts of sodium dodecyl sulfate. In step S03 of this embodiment, the parts ratio of the sodium hydroxide, the sodium sulfate, the magnesium oxide, the calcium oxide, and the calcium sulfate is: 6 parts of sodium hydroxide, 6 parts of sodium sulfate, 15 parts of magnesium oxide, 10 parts of calcium oxide and 5 parts of calcium sulfate. In step S04, the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum are in parts by weight: 45 parts of blast furnace slag, 20 parts of fly ash, 15 parts of red mud, 10 parts of mine tailings and 10 parts of phosphogypsum.
The vertical impermeable isolation ecological barrier material for the polluted site prepared in the second to fifth embodiments is tested for the unconfined compressive strength and permeability coefficient of the test sample according to JTG E40-2007 specification JTG for road geotechnical test, and the adsorption retardation rate of each group of test samples for different pollutants is tested at the same time, as shown in the following table:
as can be seen from the table, the unconfined compressive strength of the vertical anti-seepage isolation ecological barrier materials for the polluted site prepared in the second to fifth examples is more than 2.0MPa in 28 days, and the permeability coefficients are less than 10-8cm/s, compared with the requirement of 10 for the vertical barrier material for the polluted site-7cm/s is lower by one order of magnitude, and has high adsorption retardation rate on inorganic heavy metal ions and organic pollutants, which shows that the invention has the advantages of high adsorption retardation rate, high adsorption stability, high adsorption rate, highThe vertical anti-seepage isolation ecological barrier material for the polluted site can effectively intercept and control the diffusion and migration of pollutants in the polluted site, and ensure the long-term safe sealing and storage of the polluted site.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention.
Claims (10)
1. A preparation method of a vertical anti-seepage isolation ecological barrier material for a polluted site is characterized by comprising the following steps:
grinding a mixture of bentonite, kaolin and attapulgite, and dispersing the mixture in water to obtain a first mixed slurry;
adding sodium carbonate, sodium silicate and sodium dodecyl sulfate into the first mixed slurry, stirring and standing to obtain a second mixed slurry;
adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the second mixed slurry, and stirring to obtain a third mixed slurry;
and grinding the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum, adding into the third mixed slurry, and stirring to obtain the vertical anti-seepage isolation ecological barrier material for the polluted site.
2. The preparation method of the vertical anti-seepage isolation ecological barrier material for the polluted site according to claim 1, wherein the parts ratio of the bentonite, the kaolin and the attapulgite is as follows: 30-60 parts of bentonite, 20-40 parts of kaolin and 5-20 parts of attapulgite.
3. The preparation method of the vertical anti-seepage isolation ecological barrier material for the polluted site according to claim 1, wherein the sodium carbonate, the sodium silicate and the sodium dodecyl sulfate are prepared from the following components in parts by weight: 3-8 parts of sodium carbonate, 2-6 parts of sodium silicate and 1-5 parts of sodium dodecyl sulfate.
4. The preparation method of the vertical impermeable isolation ecological barrier material for the polluted site according to claim 1, wherein the parts ratio of the sodium hydroxide, the sodium sulfate, the magnesium oxide, the calcium oxide and the calcium sulfate is as follows: 5-10 parts of sodium hydroxide, 2-6 parts of sodium sulfate, 10-20 parts of magnesium oxide, 10-20 parts of calcium oxide and 5-25 parts of calcium sulfate.
5. The preparation method of the vertical anti-seepage isolation ecological barrier material for the polluted site according to claim 1, wherein the parts ratio of the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum is as follows: 20-50 parts of blast furnace slag, 20-30 parts of fly ash, 10-20 parts of red mud, 5-15 parts of mine tailings and 10-30 parts of phosphogypsum.
6. The preparation method of the vertical anti-seepage isolation ecological barrier material for the polluted site according to any one of claims 1 to 5, wherein the step of grinding the mixture of bentonite, kaolin and attapulgite and then dispersing the ground mixture in water to obtain a first mixed slurry specifically comprises the following steps:
grinding the bentonite, the kaolin and the attapulgite in a ball mill to obtain a first ground substance;
passing the first ground substance through a square hole sieve with the particle size of 75 mu m to obtain a first ground substance with the particle size of less than 75 mu m;
and mixing the ground material with the granularity of less than 75 micrometers and water according to the mass ratio of 1: 10-1: 20, and stirring and dispersing to obtain a first mixed slurry.
7. The preparation method of the vertical anti-seepage isolation ecological barrier material for the polluted site according to any one of claims 1 to 5, wherein sodium carbonate, sodium silicate and sodium dodecyl sulfate are added into the first mixed slurry, and the second mixed slurry is obtained by stirring and standing at a stirring speed of 2000r/min for 10min and 24 h.
8. The preparation method of the vertical anti-seepage isolation ecological barrier material for the polluted site according to any one of claims 1 to 5, wherein the step of adding sodium hydroxide, sodium sulfate, magnesium oxide, calcium oxide and calcium sulfate into the second mixed slurry, and the step of stirring to obtain a third mixed slurry specifically comprises the following steps:
firstly, stirring the second mixed slurry at a stirring speed of 1000r/min for 5min to re-disperse the second mixed slurry uniformly;
and adding the sodium hydroxide, the sodium sulfate, the magnesium oxide, the calcium oxide and the calcium sulfate into the second mixed slurry which is re-dispersed uniformly, and stirring again to obtain a third mixed slurry, wherein the stirring speed is 2000r/min, and the stirring time is 10 min.
9. The preparation method of the vertical anti-seepage isolation ecological barrier material for the polluted site according to any one of claims 1 to 5, wherein the step of grinding the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum, adding the ground powder into the third mixed slurry, and stirring to obtain the vertical anti-seepage isolation ecological barrier material for the polluted site specifically comprises the following steps:
grinding the blast furnace slag, the fly ash, the red mud, the mine tailings and the phosphogypsum in a ball mill at the grinding speed of 400r/min for 6-12 h to obtain a second ground substance;
and adding the second ground powder into the third mixed slurry for stirring at the stirring speed of 3000r/min for 15min to obtain the vertical anti-seepage isolation ecological barrier material for the polluted site.
10. The vertical anti-seepage isolation ecological barrier material for the polluted site is characterized by being prepared from the following raw materials in parts by weight:
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113461380A (en) * | 2021-07-06 | 2021-10-01 | 中船第九设计研究院工程有限公司 | Plastic concrete for vertical antifouling barrier |
| CN113636810A (en) * | 2021-08-09 | 2021-11-12 | 上海圣珑环境修复技术有限公司 | Curtain grouting for vertical antifouling barrier |
| CN114276080A (en) * | 2021-12-17 | 2022-04-05 | 武汉大学 | Impermeable layer material and application thereof |
| CN115893911A (en) * | 2022-10-25 | 2023-04-04 | 中国科学院武汉岩土力学研究所 | Clay-loaded cross-linked polymer flexible anti-seepage barrier material and preparation method thereof |
| AU2021290246B2 (en) * | 2021-11-16 | 2023-11-02 | Advanced Materials Institute, Shandong Academy Of Sciences | Vitrified aggregate biscuit anti-powder-shedding film overlaying agent, film overlaying system and film overlaying method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030075045A (en) * | 2002-03-15 | 2003-09-22 | 주식회사 대동그린산업 | The Manufacturing Method and The Soil Stabilizer Improving High Water Content-Soft Ground Reusong Industrial Discharge and Ocean Waste |
| CN103951347A (en) * | 2014-04-17 | 2014-07-30 | 常州工学院 | Refuse landfill seepage-proofing slurry material and preparation method thereof |
| CN107759171A (en) * | 2017-10-30 | 2018-03-06 | 滨州学院 | A kind of antiseepage slurry for garbage loading embeading divider wall and preparation method thereof |
| CN108409240A (en) * | 2018-03-23 | 2018-08-17 | 徐涛 | A kind of preparation method of garbage loading embeading base impermeable cement slurry |
| CN108996933A (en) * | 2018-09-27 | 2018-12-14 | 安徽建筑大学 | A kind of impervious material and preparation method thereof based on architecture sediment |
| CN109704685A (en) * | 2019-02-25 | 2019-05-03 | 常州工学院 | A kind of the soot anti-seepage slurry material and preparation method modified based on sodium carboxymethyl cellulose |
-
2020
- 2020-08-28 CN CN202010881893.0A patent/CN112028582B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030075045A (en) * | 2002-03-15 | 2003-09-22 | 주식회사 대동그린산업 | The Manufacturing Method and The Soil Stabilizer Improving High Water Content-Soft Ground Reusong Industrial Discharge and Ocean Waste |
| CN103951347A (en) * | 2014-04-17 | 2014-07-30 | 常州工学院 | Refuse landfill seepage-proofing slurry material and preparation method thereof |
| CN107759171A (en) * | 2017-10-30 | 2018-03-06 | 滨州学院 | A kind of antiseepage slurry for garbage loading embeading divider wall and preparation method thereof |
| CN108409240A (en) * | 2018-03-23 | 2018-08-17 | 徐涛 | A kind of preparation method of garbage loading embeading base impermeable cement slurry |
| CN108996933A (en) * | 2018-09-27 | 2018-12-14 | 安徽建筑大学 | A kind of impervious material and preparation method thereof based on architecture sediment |
| CN109704685A (en) * | 2019-02-25 | 2019-05-03 | 常州工学院 | A kind of the soot anti-seepage slurry material and preparation method modified based on sodium carboxymethyl cellulose |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113461380A (en) * | 2021-07-06 | 2021-10-01 | 中船第九设计研究院工程有限公司 | Plastic concrete for vertical antifouling barrier |
| CN113461380B (en) * | 2021-07-06 | 2023-02-21 | 中船第九设计研究院工程有限公司 | Plastic concrete for vertical antifouling barrier |
| CN113636810A (en) * | 2021-08-09 | 2021-11-12 | 上海圣珑环境修复技术有限公司 | Curtain grouting for vertical antifouling barrier |
| AU2021290246B2 (en) * | 2021-11-16 | 2023-11-02 | Advanced Materials Institute, Shandong Academy Of Sciences | Vitrified aggregate biscuit anti-powder-shedding film overlaying agent, film overlaying system and film overlaying method |
| CN114276080A (en) * | 2021-12-17 | 2022-04-05 | 武汉大学 | Impermeable layer material and application thereof |
| CN115893911A (en) * | 2022-10-25 | 2023-04-04 | 中国科学院武汉岩土力学研究所 | Clay-loaded cross-linked polymer flexible anti-seepage barrier material and preparation method thereof |
| CN115893911B (en) * | 2022-10-25 | 2024-01-16 | 中国科学院武汉岩土力学研究所 | Clay-loaded crosslinked polymer flexible impermeable barrier material and preparation method thereof |
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