CN112321102A - Black and odorous water body sediment repairing agent and preparation and use methods thereof - Google Patents

Black and odorous water body sediment repairing agent and preparation and use methods thereof Download PDF

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Publication number
CN112321102A
CN112321102A CN202011158305.7A CN202011158305A CN112321102A CN 112321102 A CN112321102 A CN 112321102A CN 202011158305 A CN202011158305 A CN 202011158305A CN 112321102 A CN112321102 A CN 112321102A
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China
Prior art keywords
parts
water body
black
sediment
odorous water
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CN202011158305.7A
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Chinese (zh)
Inventor
夏明升
龚明杰
李鹏程
程涛
孙玉童
阮慧林
李中玉
马永春
汪向
阳王猛
周强
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Anhui Tongyuan Environment Energy Saving Co Ltd
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Anhui Tongyuan Environment Energy Saving Co Ltd
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Priority to CN202011158305.7A priority Critical patent/CN112321102A/en
Publication of CN112321102A publication Critical patent/CN112321102A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/008Sludge treatment by fixation or solidification
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/06Treatment of sludge; Devices therefor by oxidation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/105Phosphorus compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00Use of specific compounds during water treatment
    • C02F2305/02Specific form of oxidant
    • C02F2305/026Fenton's reagent

Abstract

The invention discloses a black and odorous water body sediment repairing agent and preparation and use methods thereof, wherein the repairing agent is composed of the following raw materials in parts by mass: 2-20 parts of calcium peroxide, 1-10 parts of ferrous sulfate, 2-16 parts of sodium gluconate, 1-8 parts of kieselguhr, 1-8 parts of chitin, 3-12 parts of ferroferric oxide, 25-50 parts of composite portland cement and 12-25 parts of quick lime. The materials used in the invention are all environment-friendly, complex secondary processing is not needed, the obtaining way is convenient, the use and operation are simple, the effect taking speed is high, the flexible solidified body with stronger biochemical cohesive force can be generated, the flexible solidified body is not easy to scatter and turn up even under the condition of larger flow in rainy season, the secondary pollution to the water body is avoided, and the generated flexible solidified body ensures that the sediment is solidified without being excessively hardened, thereby being beneficial to the construction of a later aquatic plant system.

Description

Black and odorous water body sediment repairing agent and preparation and use methods thereof
Technical Field
The invention relates to the technical field of black and odorous water body treatment, in particular to a black and odorous water body sediment repairing agent and a preparation method and a use method thereof.
Background
The bottom mud treatment plays an important role in black and odorous water body treatment. The bottom mud of the black and odorous water body continuously receives pollutants from the water body to become an accumulation reservoir of the pollutants, thereby causing serious pollution. When the sediment of the water body is disturbed, such as sudden change of hydrodynamic conditions, ship navigation operation, wind disturbance and the like, pollutants in the sediment can be released into the water body again, and secondary pollution is caused. If the release of pollutants in the bottom mud of rivers and lakes can not be effectively controlled, the endogenous pollution caused by the pollutants can become a main source of water body pollution, and even if the discharge amount of the exogenous pollutants is effectively reduced, the black and odorous water body environment treatment can not achieve good effects. Therefore, the bottom mud treatment plays an important role in the black and odorous water body treatment.
The sediment treatment can be divided into dredging and in-situ restoration, wherein the dredging usually requires a large amount of mechanical equipment and manpower and material resources, and sediment going ashore needs a large treatment field to be absorbed, so that certain restrictions exist in practical application.
The in-situ remediation of the bottom mud has wide application requirements. The in-situ remediation technology of the bottom mud mainly comprises two types: the biological method is characterized in that a microbial preparation is added into water or bottom mud to promote degradation of organic matters in the bottom mud; and the other is a chemical method, namely adding flocculating agents and the like into the bottom mud to reduce the release of the pollution in the bottom mud to a water body, or adding hardening agents and auxiliary agents such as lime, volcanic ash, cement, modified titanium dioxide and the like into the bottom mud to reduce the solubility, the mobility or the toxicity of pollutants such as nitrogen, phosphorus, heavy metals and the like. At present, some technologies combine biological methods and chemical methods to a certain extent and put them into use.
However, the sediment repair components of the sediment in the prior art are often required to be processed and prepared in a complex way, so that the sediment repair components are inconvenient to use; the method has the advantages that the method has insufficient decomposition, sedimentation and reduction on serious black and odorous bottom sludge pollutants, and is easy to form black and odorous again and release pollutants such as nitrogen, phosphorus, COD (chemical oxygen demand), heavy metals and the like to a water body; the large amount of strong oxidant is adopted to treat the bottom mud for a long time, so that macromolecular organic matters are continuously and quickly decomposed to generate a large amount of substances such as free nitrogen and phosphorus, heavy metals and the like, the pollutants are excessively released to the water body, and the black and odor phenomenon of the water body and the pollution of heavy metal ions are further aggravated; the treated bottom mud has low compactness and insufficient solidification, and is easy to turn upwards after being washed by water flow in rainy season, so that secondary pollution is caused; or the hardness of the treated bottom mud is too high, so that the construction of a later aquatic plant system is difficult.
Disclosure of Invention
The invention aims to provide a black and odorous water body bottom mud repairing agent and preparation and use methods thereof, wherein the compound components of the black and odorous water body bottom mud repairing agent are all environment-friendly materials, the obtaining way is convenient, the use and operation are simple, the problems that the black and odorous water body bottom mud repairing agent is easy to scatter and turn over in rainy seasons with large flow and secondary pollution to the water body are solved, meanwhile, the hardness of the treated bottom mud is proper, the subsequent construction of an aquatic plant system is facilitated, the compactness and stability of the sludge are enhanced, the release of pollutants such as nitrogen, phosphorus, heavy metals and the like in the bottom mud to the water body is effectively reduced, and the transparency of the water body is.
In order to achieve the purpose, the invention provides the following technical scheme:
the black and odorous water body sediment repairing agent is composed of the following raw materials in parts by mass: 2-20 parts of calcium peroxide, 1-10 parts of ferrous sulfate, 2-16 parts of sodium gluconate, 1-8 parts of kieselguhr, 1-8 parts of chitin, 3-12 parts of ferroferric oxide, 25-50 parts of composite portland cement and 12-25 parts of quick lime.
As a further scheme of the invention: the raw materials are all powder raw materials which can pass through a 100-mesh screen.
A preparation method of the black and odorous water body bottom mud repairing agent comprises the following steps: firstly, weighing the calcium peroxide, the ferrous sulfate, the sodium gluconate, the diatomite, the chitin, the ferroferric oxide, the composite portland cement and the quicklime which are in a powder state and can pass through a 100-mesh screen; and then uniformly mixing the powdery raw materials according to the corresponding proportion to prepare the black and odorous water body bottom mud repairing agent.
A use method of the black and odorous water body bottom mud repairing agent comprises the following steps: draining the water body to expose the bottom mud according to the weight of 0.5-2.0 kg/m2The black and odorous water body sediment repairing agent is uniformly added into a sediment area to be repaired, then the sediment area is stirred and uniformly mixed within a range of 10cm on the surface layer of the sediment, the mixture is fully reacted for 3-7 days, and water can be stored again after the repairing is finished.
Compared with the prior art, the invention has the beneficial effects that:
(1) the calcium peroxide and the ferrous sulfate adopted by the invention apply mild Fenton reaction in the bottom sludge remediation, quickly and thoroughly decompose organic pollutants in the bottom sludge, reduce ammonia nitrogen and COD, and have the advantages of high treatment speed and simple and convenient operation. The oxygen slow-release function of the calcium peroxide can be utilized to inhibit the black and odorous bottom mud for a long time and a long time.
(2) The method adopts the sodium gluconate as the heavy metal chelating agent polluting the bottom mud, and has the advantages of wide pH application range, excellent chelating performance, environmental friendliness and no harm compared with other chelating agents; the adsorption and sedimentation characteristics of the chitin and the diatomite are combined, and the treatment effect on heavy metals, nitrogen and phosphorus is enhanced.
(3) According to the invention, by utilizing the attraction and aggregation characteristics of the magnetic material and the hydration and consolidation characteristics of cement and lime, larger copolymerization particle groups can be formed in the sediment; the chitin that adds is as a natural polymer biomaterial, great molecular weight has, more functional group and good biological stickness, can form vertically and horizontally staggered's biopolymer crane span structure inside the bed mud, adsorb the copolymerization particle that is formed by cement, lime and magnetic material, thereby the flexible solidification body that has stronger biochemical cohesion is produced jointly, even under the condition of the great flow in rainy season, also be difficult to break up and turn over, the secondary pollution to the water has been avoided, and the flexible solidification body that produces makes the bed mud solidify but not excessively harden, be favorable to the construction of later stage aquatic plant system.
(4) The materials used in the invention are all environment-friendly, complex secondary processing is not needed, the obtaining way is convenient, the use and the operation are simple, the effect taking speed is high, and the project construction period can be greatly shortened.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The black and odorous water body sediment repairing agent is composed of the following raw materials in parts by mass: 2-20 parts of calcium peroxide, 1-10 parts of ferrous sulfate, 2-16 parts of sodium gluconate, 1-8 parts of kieselguhr, 1-8 parts of chitin, 3-12 parts of ferroferric oxide, 25-50 parts of composite portland cement and 12-25 parts of quick lime.
The calcium peroxide and the ferrous sulfate are mainly used for powerful oxygenation and oxidation, after the calcium peroxide and the substrate sludge with larger water content are stirred and uniformly mixed, the calcium peroxide and the water react to generate hydrogen peroxide, the hydrogen peroxide and the ferrous sulfate can generate mild Fenton reaction to generate a large amount of hydroxyl radicals with strong oxidation capacity, and the hydroxyl radicals have powerful oxidation removal effect on organic pollutants, ammonia nitrogen and COD in the substrate sludge; in addition, the calcium peroxide can slowly and durably release oxygen, and has the effect of long-acting inhibition of ammonia nitrogen and COD.
Optionally, the typical but non-limiting parts by weight of the calcium peroxide are: 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts and 20 parts.
Optionally, the typical but non-limiting parts by weight of the ferrous sulfate are: 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts and 10 parts.
The sodium gluconate can well chelate and passivate heavy metals within a larger pH value range, and in addition, the sodium gluconate has a promoting effect on the curing strength of subsequent composite portland cement, so that the compactness of the cured bottom mud can be enhanced.
Optionally, the sodium gluconate is typically, but not limited to, in parts by mass: 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts and 16 parts.
Diatomaceous earth and chitin have good heavy metal and nitrogen phosphorus's adsorption, and chitin is as a natural polymer biomaterial, great molecular weight has, more functional group and good biological stickness, can form vertically and horizontally staggered's biopolymer crane span structure inside the bed mud, adsorb by cement, the copolymerization particle that lime and magnetic material formed, thereby the flexible solidification body that jointly generates has strong biochemical cohesion, even under the condition of the great flow in rainy season, also be difficult to break up and turn over, secondary pollution to the water has been avoided, the flexible solidification body that generates makes the bed mud solidify but not excessively harden, can be under the bed mud hardness that does not cause secondary pollution, carry out later stage aquatic plant system's construction simultaneously on this bed mud.
Optionally, the typical but non-limiting parts by weight of the diatomaceous earth are: 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts and 8 parts.
Optionally, the typical but non-limiting mass parts of the chitin are as follows: 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts and 8 parts.
The ferroferric oxide powder has higher specific gravity and good magnetic characteristics, and can increase the gathering capacity of the microstructure of the bottom mud, thereby enhancing the compactness and stability of the bottom mud and reducing the release of bottom mud pollution.
Optionally, the typical but non-limiting parts by mass of the ferroferric oxide are as follows: 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts and 12 parts.
The composite portland cement and the quicklime are used as bottom mud curing agents, wherein the composite portland cement can be used for curing and stabilizing the bottom mud to a certain degree, the quicklime plays a role in promoting the curing process, and the formed alkaline environment and calcium ions can effectively stabilize phosphate and partial heavy metal ions. By adjusting the adding scheme, the bottom mud is solidified without being excessively hardened, so that the construction of a later-stage aquatic plant system is facilitated.
Optionally, the typical but non-limiting mass parts of the composite portland cement are as follows: 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts, 46 parts, 47 parts, 48 parts, 49 parts and 50 parts.
Optionally, typical but non-limiting parts by mass of the quicklime are as follows: 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts and 25 parts.
The invention also provides a preparation method of the black and odorous water body bottom mud repairing agent, which comprises the following steps: firstly, weighing the calcium peroxide, the ferrous sulfate, the sodium gluconate, the diatomite, the chitin, the ferroferric oxide, the composite portland cement and the quicklime which are in a powder state and can pass through a 100-mesh screen; and then uniformly mixing the powdery raw materials according to the corresponding proportion to prepare the black and odorous water body bottom mud repairing agent.
The invention also provides a use method of the black and odorous water body bottom mud repairing agent, which comprises the following steps: draining the water body to expose the bottom mud according to the weight of 0.5-2.0 kg/m2The black and odorous water body bottom sediment repairing agent is uniformly added into a bottom sediment area to be repaired, then the bottom sediment surface layer is uniformly stirred within a range of 10cm, the mixture is fully reacted for 3-7 days, and water can be stored again after the repairing is finished.
The technical solution of the present invention will be described in detail with reference to the following specific examples.
Example 1
The black and odorous water body sediment repairing agent provided in embodiment 1 comprises, by mass, 2 parts of calcium peroxide, 1 part of ferrous sulfate, 2 parts of sodium gluconate, 1 part of diatomite, 1 part of chitin, 3 parts of ferroferric oxide, 25 parts of composite phosphate cement, and 12 parts of quicklime.
The black and odorous water body sediment repairing agent is prepared according to the following steps: firstly, weighing the raw materials which are in a powder state and can pass through a 100-mesh screen according to the mass parts; and then uniformly mixing the powdery raw materials according to the corresponding proportion to prepare the black and odorous water body bottom mud repairing agent.
Example 2
The black and odorous water body bottom mud repairing agent provided in embodiment 2 comprises, by mass, 10 parts of calcium peroxide, 5 parts of ferrous sulfate, 9 parts of sodium gluconate, 5 parts of diatomite, 5 parts of chitin, 7 parts of ferroferric oxide, 37 parts of composite phosphate cement, and 18 parts of quicklime.
The preparation method of the black and odorous water body bottom mud remediation agent of example 2 is the same as that of example 1.
Example 3
The black and odorous water body bottom mud repairing agent provided in embodiment 3 comprises, by mass, 16 parts of calcium peroxide, 4 parts of ferrous sulfate, 8 parts of sodium gluconate, 2 parts of diatomite, 2 parts of chitin, 5 parts of ferroferric oxide, 42 parts of composite phosphate cement, and 21 parts of quicklime.
The preparation method of the black and odorous water body bottom mud remediation agent of example 3 is the same as that of example 1.
Example 4
The black and odorous water body bottom mud repairing agent provided in embodiment 4 comprises, by mass, 20 parts of calcium peroxide, 10 parts of ferrous sulfate, 16 parts of sodium gluconate, 8 parts of diatomite, 8 parts of chitin, 12 parts of ferroferric oxide, 50 parts of composite phosphate cement, and 25 parts of quicklime.
The preparation method of the black and odorous water body bottom mud remediation agent of example 4 is the same as that of example 1.
Comparative example 1
The black and odorous water body bottom mud repairing agent provided by the comparative example 1 comprises, by mass, 25 parts of calcium peroxide, 15 parts of ferrous sulfate, 21 parts of sodium gluconate, 13 parts of diatomite, 13 parts of chitin, 17 parts of ferroferric oxide, 55 parts of composite phosphate cement and 30 parts of quick lime.
The preparation method of the black and odorous water body bottom mud remediation agent of the comparative example 1 is the same as that of the example 1.
Comparative example 2
The black and odorous water body sediment repair agent provided by the comparative example 2 is different from the example 3 in that the comparative example 2 does not contain chitin, and the rest of the composition is the same as that of the example 3.
The preparation method of the black and odorous water body bottom mud remediation agent of the comparative example 2 is the same as that of example 1.
Comparative example 3
Comparative example 3 is a blank test group, i.e., in the subsequent effect example test, no substance was added.
Examples of effects
Setting 7 groups of cuboid glass cylinders as simulated river channels (length 0.8m, width 0.4m and height 0.4m), collecting some black and odorous river channel bottom mud polluted by lead in the field, and uniformly laying 10cm of height at the bottom of the simulated river channels, wherein 6 groups are 1kg/m2Adding the black and odorous water body sediment repairing agent prepared according to the proportion in the examples 1-4 and the comparative examples 1-2, uniformly mixing, adding river water with the height of 20cm into 7 groups of simulated riverways as overlying water after 3 days without adding the black and odorous water body sediment repairing agent into the other group of simulated riverways as the comparative example 3, observing the color and consolidation condition of the bottom sediment of the 7 groups after 7 days, and measuring the pollution release data of the overlying water, wherein three submerged plants including tape grass, hornworts and watermifos are uniformly inserted into the bottom sediment of the 7 groups of simulated riverways, the planting density of the submerged plants is 30 plants per square meter, and after 3 months, the survival rate of the submerged plants is counted, and all the measurement results are shown in table 1.
TABLE 1
Figure BDA0002743489080000071
As can be seen from table 1 above, compared with comparative examples 1 to 3, examples 1 to 4 have a bottom sediment treatment effect, inhibit release of nitrogen, phosphorus and lead of endogenous pollutants, increase the compactness of the bottom sediment, and improve the water quality index of overlying water, and compared with the plant survival rate examples, the plant survival rate examples are increased in proportion, so that the construction of an aquatic plant system can be realized under the condition of preventing secondary pollution.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (4)

1. The black and odorous water body sediment repairing agent is characterized by comprising the following raw materials in parts by mass: 2-20 parts of calcium peroxide, 1-10 parts of ferrous sulfate, 2-16 parts of sodium gluconate, 1-8 parts of kieselguhr, 1-8 parts of chitin, 3-12 parts of ferroferric oxide, 25-50 parts of composite portland cement and 12-25 parts of quick lime.
2. The black and odorous water body bottom mud repairing agent according to claim 1, wherein the raw materials are all powdery raw materials which can pass through a 100-mesh screen.
3. The preparation method of the black and odorous water body sediment repairing agent according to claims 1 to 4, characterized by weighing the calcium peroxide, ferrous sulfate, sodium gluconate, diatomite, chitin, ferroferric oxide, composite portland cement and quicklime in a powder state and capable of passing through a 100-mesh screen; and then uniformly mixing the powdery raw materials according to the corresponding proportion to prepare the black and odorous water body bottom mud repairing agent.
4. The use method of the black and odorous water body sediment remediation agent as claimed in claims 1 to 4, wherein the water body is drained to expose sediment at a rate of 0.5 to 2.0kg/m2The black and odorous water body sediment repairing agent is uniformly added into a sediment area to be repaired, then the sediment area is stirred and uniformly mixed within a range of 10cm on the surface layer of the sediment, the mixture is fully reacted for 3-7 days, and water can be stored again after the repairing is finished.
CN202011158305.7A 2020-10-26 2020-10-26 Black and odorous water body sediment repairing agent and preparation and use methods thereof Pending CN112321102A (en)

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WO2019168213A1 (en) * 2018-02-27 2019-09-06 (주)한국환경복원기술 Composition for stabilizing and improving soil that contains contaminated sediment and/or waste, and accelerating solidification thereof, and preparation method therefor
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