CN112852433B - Contaminated site odor control agent and preparation method thereof - Google Patents
Contaminated site odor control agent and preparation method thereof Download PDFInfo
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- CN112852433B CN112852433B CN202011616568.8A CN202011616568A CN112852433B CN 112852433 B CN112852433 B CN 112852433B CN 202011616568 A CN202011616568 A CN 202011616568A CN 112852433 B CN112852433 B CN 112852433B
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- control agent
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
- C09K17/18—Prepolymers; Macromolecular compounds
- C09K17/32—Prepolymers; Macromolecular compounds of natural origin, e.g. cellulosic materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/246—Intercrosslinking of at least two polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
- C08J2305/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
- C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/08—Cellulose derivatives
- C08J2401/26—Cellulose ethers
- C08J2401/28—Alkyl ethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
- C08J2405/16—Cyclodextrin; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2479/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2461/00 - C08J2477/00
- C08J2479/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2479/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a pollution site peculiar smell control agent and a preparation method thereof. The raw materials of the control agent comprise chitosan, cyclodextrin, cellulose ether, polyamino acid and a cross-linking agent. The raw materials are dispersed in water according to a certain proportion, a cross-linking agent is added to react to prepare a control agent product, the control agent product is sprayed on the surface of a polluted site, and the components seep down along soil pores and form a bonding body with soil, so that peculiar smell substances in the soil are prevented from volatilizing into the atmosphere. The preparation method is simple, raw materials are easy to obtain, the cost is low, the effective action time for controlling the peculiar smell of the polluted soil is long, and the soil can be biodegraded without generating secondary pollution. The control agent of the invention is used for treating the peculiar smell of the polluted site by spraying, and the operation is convenient.
Description
Technical Field
The invention relates to the technical field of pollution site odor treatment and control, in particular to a pollution site odor control agent and a preparation method thereof.
Background
With the needs of rapid urban development and industrial upgrading, industrial sites outside the range of the original city are gradually brought into urban planning, and polluted site soil left by enterprises such as petroleum refining, coking, organic chemical industry, pesticides and the like is rich in benzene series, chlorinated hydrocarbons, sulfur-containing substances, nitrogen-containing substances and other malodorous substances. These malodorous substances are released to the atmosphere continuously, and affect the air quality of the surrounding environment and the physical and psychological health of surrounding residents. The disturbing operation in the polluted site repairing process accelerates the release of the malodorous substances, and further aggravates the odor disturbing pollution to residents. Aiming at the problem of VOCs dissipation pollution in the repair construction process of the organic pollution site, particularly the problem that the odor diffusion is difficult to prevent through large-scale measures in the deep foundation pit excavation operation process, the scientific and effective odor control technology is the best means for cutting off the way of pollutants entering air. At present, the odor control agent is sprayed to effectively control the malodorous substances in the polluted site remediation.
Patent CN103484127A discloses a foam for treating contaminated soil and a treatment method thereof, which has the functions of adsorbing and eliminating pollutants in the soil, but not controlling soil odor. Patent CN111282987A discloses an inhibitor for treating the peculiar smell of polluted soil and a treatment method thereof, and prepares a peculiar smell inhibitor capable of quickly forming a film on the surface of the soil, but the effective control time is short and the spraying method is complex.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a pollution site odor control agent and a preparation method thereof. The control agent for the peculiar smell of the polluted soil has low cost and long effective action time, can be biologically degraded without generating secondary pollution, and the method for treating the peculiar smell of the polluted soil by using the control agent has simple operation and can realize the control of the peculiar smell of the polluted soil without complicated steps.
The technical scheme of the invention is as follows:
a pollution site odor control agent is prepared by reacting chitosan, cyclodextrin, cellulose ether and polyamino acid through a cross-linking agent, and comprises an uncrosslinked penetrating component and a fully crosslinked gel sealing component, and the method comprises the following specific steps:
(1) under the condition of continuous stirring, dispersing chitosan, cyclodextrin, cellulose ether and polyamino acid in water to obtain a mixed solution of chitosan, cyclodextrin, cellulose ether and polyamino acid;
(2) under the condition of continuous stirring, adding a cross-linking agent into the mixed solution in the step (1), heating to 40-80 ℃, and preserving heat for 1-5 hours to partially cross-link partial substances in the mixed solution to form the pollution site peculiar smell control agent.
The chitosan in the step (1) is one or more of chitin N-deacetylated products, acylated chitosan, hydroxylated chitosan and carboxymethyl chitosan, wherein carboxymethyl chitosan is preferred, and the concentration of chitosan in the solution is 0.1-5.0%.
The cyclodextrin in the step (1) is one or more of alpha cyclodextrin, beta cyclodextrin and gamma cyclodextrin, wherein the beta cyclodextrin is preferred, and the concentration of the cyclodextrin in the solution is 0.1-5.0%.
In the step (1), the cellulose ether is one or more of methyl cellulose, hydroxyethyl methyl cellulose, carboxymethyl cellulose, ethyl cellulose, benzyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, cyanoethyl cellulose, benzyl cyanoethyl cellulose, carboxymethyl hydroxyethyl cellulose and phenyl cellulose and sodium salt, wherein the preferred cellulose is sodium carboxymethyl cellulose, and the concentration of the cellulose ether in the solution is 0.1-5.0%.
In the step (1), the polyamino acid is one or two of polyaspartic acid and polyglutamic acid, wherein the polyaspartic acid is preferred, and the concentration of the polyamino acid in the solution is 0.1-10.0%.
In the step (2), the cross-linking agent is one or two of glutaraldehyde and epichlorohydrin, wherein glutaraldehyde is preferred, and the concentration of the cross-linking agent in the solution is 0.01% -5.0%.
Detailed Description
Example 1
Taking 1.0L of pure water, sequentially adding 50g of carboxymethyl chitosan, 20g of beta-cyclodextrin, 10g of sodium carboxymethyl cellulose and 20g of polyaspartic acid under the condition of continuous stirring, after completely dissolving, adding 60ml of 50% glutaraldehyde solution into the solution, heating to 70 ℃, and carrying out heat preservation reaction for 2 hours to obtain the odor control agent.
The control agent prepared in this example was uniformly sprayed on contaminated soil containing toluene, ethyl acetate, and dimethyl disulfide for sealing control. The contents of toluene, ethyl acetate and dimethyl disulfide in the other part of the soil were the same, but no odor control agent was used. According to detection, the total release flux of toluene, ethyl acetate and dimethyl disulfide is reduced by 92% within 14 days by adopting the odor control agent.
Example 2
Taking 1.0L of pure water, sequentially adding 20g of carboxymethyl chitosan, 10g of beta-cyclodextrin, 10g of sodium carboxymethyl cellulose and 20g of polyaspartic acid under the condition of continuous stirring, after completely dissolving, adding 40ml of 50% glutaraldehyde solution into the solution, heating to 50 ℃, and carrying out heat preservation reaction for 2 hours to obtain the odor control agent.
The control agent prepared in the embodiment is uniformly sprayed on polluted soil containing toluene, ethyl acetate and trichloroethylene for sealing control. The contents of toluene, ethyl acetate and trichloroethylene in the other part of soil are the same, but no odor control agent is used. Through detection, the total release flux of the toluene, the ethyl acetate and the trichloroethylene is reduced by 88 percent within 14 days by adopting the odor control agent.
Example 3
Taking 1.0L of pure water, sequentially adding 30g of carboxymethyl chitosan, 20g of beta-cyclodextrin, 10g of sodium carboxymethyl cellulose and 20g of polyaspartic acid under the condition of continuous stirring, after completely dissolving, adding 70ml of 50% glutaraldehyde solution into the solution, heating to 50 ℃, and carrying out heat preservation reaction for 2 hours to obtain the odor control agent.
The control agent prepared in the embodiment is uniformly sprayed on polluted soil containing toluene, trichloroethylene and dimethyl disulfide for sealing control. The contents of toluene, trichloroethylene and dimethyl disulfide in the other part of the soil are the same, but no odor control agent is used. According to detection, the total release flux of toluene, trichloroethylene and dimethyl disulfide is reduced by 87 percent within 14 days by adopting the odor control agent.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification or replacement made by those skilled in the art within the technical scope of the present invention should be covered within the scope of the present invention as defined by the appended claims.
Claims (5)
1. The pollution site odor control agent is characterized by being prepared by reacting chitosan, cyclodextrin, cellulose ether and polyamino acid through a cross-linking agent, and the preparation method of the control agent comprises the following specific steps:
(1) under the condition of continuous stirring, dispersing chitosan, cyclodextrin, cellulose ether and polyamino acid in water to obtain a mixed solution of chitosan, cyclodextrin, cellulose ether and polyamino acid; the concentration of chitosan in the solution is 0.1 to 5.0 percent, the concentration of cyclodextrin is 0.1 to 5.0 percent, the concentration of cellulose ether is 0.1 to 5.0 percent, and the concentration of polyamino acid is 0.1 to 10.0 percent;
(2) under the condition of continuous stirring, adding one or two of cross-linking agents of glutaraldehyde and epichlorohydrin into the mixed solution in the step (1) to form 0.01-5.0% of concentration, heating to 40-80 ℃, and preserving heat for 1-5 hours to partially cross-link partial substances in the mixed solution to form a pollution site peculiar smell control agent, wherein the peculiar smell control agent is composed of an uncrosslinked penetrating component and a fully cross-linked gel sealing component.
2. A contaminated site odor control agent according to claim 1, wherein: the chitosan in the step (1) is one or more of chitin N-deacetylated products, acylated chitosan, hydroxylated chitosan and carboxymethyl chitosan.
3. A contaminated site odor control agent according to claim 1, wherein: the cyclodextrin in the step (1) is one or more of alpha cyclodextrin, beta cyclodextrin and gamma cyclodextrin.
4. A contaminated site odor control agent according to claim 1, wherein: in the step (1), the cellulose ether is one or more of methyl cellulose, hydroxyethyl methyl cellulose, carboxymethyl cellulose, ethyl cellulose, benzyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, cyanoethyl cellulose, benzyl cyanoethyl cellulose, carboxymethyl hydroxyethyl cellulose, phenyl cellulose and sodium salt.
5. A contaminated site odor control agent according to claim 1, wherein: in the step (1), the polyamino acid is one or two of polyaspartic acid and polyglutamic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011616568.8A CN112852433B (en) | 2020-12-30 | 2020-12-30 | Contaminated site odor control agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011616568.8A CN112852433B (en) | 2020-12-30 | 2020-12-30 | Contaminated site odor control agent and preparation method thereof |
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| Publication Number | Publication Date |
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| CN112852433A CN112852433A (en) | 2021-05-28 |
| CN112852433B true CN112852433B (en) | 2021-12-24 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104974360A (en) * | 2014-03-05 | 2015-10-14 | 赢创工业集团股份有限公司 | Superabsorbent polymers having improved odour control properties and method for the production of same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE452109B (en) * | 1973-01-29 | 1987-11-16 | Pharmacia Ab | SCIENTIFIC CLEANER EXTENDED SARYTOR |
| EP0389015A3 (en) * | 1989-03-20 | 1991-08-28 | The Procter & Gamble Company | Absorbent structures with odor control material |
| DE10210124A1 (en) * | 2002-03-08 | 2003-09-18 | Basf Ag | Polymer mixtures with improved odor control |
| JP2005523315A (en) * | 2002-04-16 | 2005-08-04 | コスメティカ， インコーポレイテッド | Polymeric odor absorbing ingredients for personal care products |
| DE102007007203A1 (en) * | 2007-02-09 | 2008-08-14 | Evonik Stockhausen Gmbh | Water-absorbing polymer structure with high ammonia binding capacity |
| TWI625355B (en) * | 2017-03-31 | 2018-06-01 | 臺灣塑膠工業股份有限公司 | superabsorbent polymer and the method of fabricating the same |
| CN111282987B (en) * | 2020-02-28 | 2022-03-29 | 中科鼎实环境工程有限公司 | Inhibitor for treating peculiar smell of polluted soil and treatment method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104974360A (en) * | 2014-03-05 | 2015-10-14 | 赢创工业集团股份有限公司 | Superabsorbent polymers having improved odour control properties and method for the production of same |
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