CN112898837B - Contaminated site odor control agent and preparation method thereof - Google Patents

Contaminated site odor control agent and preparation method thereof Download PDF

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CN112898837B
CN112898837B CN202110033174.8A CN202110033174A CN112898837B CN 112898837 B CN112898837 B CN 112898837B CN 202110033174 A CN202110033174 A CN 202110033174A CN 112898837 B CN112898837 B CN 112898837B
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control agent
soil
odor
water
odor control
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CN112898837A (en
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张骞
高卫国
杨勇
姚元义
常玉虎
关峰
杨晓智
郭超
张景鑫
姜伟
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Zhongke Dingshi Environmental Engineering Co ltd
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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
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/02—Homopolymers or copolymers of unsaturated alcohols
    • C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention discloses a pollution site peculiar smell control agent and a preparation method thereof. The odor control agent comprises the following components in percentage by weight: 10-20% of polyvinyl alcohol, 1-2% of soluble starch, 1-2% of ammonium chloride, 3-5% of sodium dodecyl benzene sulfonate sulfate, 1-3% of sodium dodecyl sulfate, 1-2% of xanthan gum and the balance of water. The odor control agent integrates the advantages of the foaming agent and the liquid mulching film, firstly generates a large amount of foam after being sprayed, can quickly obstruct the connection between soil and ambient air, and inhibit the odor on the surface of the soil from diffusing to the ambient atmosphere, and gradually forms a compact polymer film structure on the surface of the soil under the action of the film forming agent along with the disappearance of foam pores, so that the odor control agent can continuously inhibit the odor on the surface of the soil from diffusing to the ambient atmosphere, thereby quickly and durably inhibiting the odor diffusion of the polluted soil, having better effect of controlling the odor of the soil in a polluted site and not generating new pollution.

Description

Contaminated site odor control agent and preparation method thereof
Technical Field
The invention relates to a pollution site peculiar smell control agent and a preparation method thereof, belonging to the field of pollution site restoration peculiar smell control.
Background
In the excavation process of repairing polluted soil in an organic polluted site, volatile organic matters, semi-volatile pollutants and other pollutants in the soil are easy to diffuse into the atmosphere to generate peculiar smell, so that the secondary pollution of the atmospheric environment is caused.
At present, methods such as film covering and foam covering are adopted to control the odor problem in the polluted site repairing process, HDPE films are usually used for film covering, the method cannot fundamentally solve the problem of polluted gas diffusion, the gas diffusion rate can only be temporarily relieved, the efficiency of paving the HDPE films in a large area is low, and new pollution can be caused after the used HDPE films are discarded. The foam is sprayed to temporarily isolate the polluted soil from the ambient air to control the odor diffusion, and the foam has poor stability and short half-life period, the foam duration is generally 6-12 hours, and the odor control effect is invalid along with the disappearance of the foam, so that the odor control can not be carried out for a long time.
Disclosure of Invention
The invention aims to provide an odor control agent capable of reducing the diffusion of organic matters in polluted soil, which integrates the advantages of a foaming agent and a liquid mulching film, firstly generates a large amount of foams after being sprayed, can quickly obstruct the connection between the soil and the surrounding air, and inhibit the odor on the surface of the soil from diffusing to the surrounding atmosphere, and gradually forms a compact polymer film structure on the surface of the soil under the action of a film forming agent along with the disappearance of foam pores, so that the odor control agent can quickly and permanently inhibit the odor diffusion of the polluted soil, has a good effect of controlling the odor of the soil in a polluted site, and cannot generate new pollution.
In order to achieve the purpose, the invention adopts the following technical means:
the invention provides a pollution site odor control agent, which comprises the following components in percentage by weight: 10-20% of polyvinyl alcohol, 1-2% of soluble starch, 1-2% of ammonium chloride, 3-5% of sodium dodecyl benzene sulfonate sulfate, 1-3% of sodium dodecyl sulfate, 1-2% of xanthan gum and the balance of water.
Preferably, the odor control agent comprises the following components in percentage by weight: 15% of polyvinyl alcohol, 2% of soluble starch, 2% of ammonium chloride, 4% of sodium dodecyl benzene sulfonate sulfate, 2% of sodium dodecyl sulfate, 2% of xanthan gum and 73% of water.
Preferably, the water is purified water, and the pH value is 7.0-8.0.
The invention also provides a preparation method of the odor control agent, which comprises the following steps:
(1) heating a proper amount of water to 70-90 ℃, adding polyvinyl alcohol and soluble starch into the water, uniformly stirring at the rotation speed of 100-1500r/min, and stirring for 10-20 min;
(2) sequentially adding ammonium chloride, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate into the mixed solution obtained in the step (1) and stirring at the rotating speed of 50-200r/min for 10-25 min;
(3) and (3) sequentially adding xanthan gum and the rest water into the mixed solution obtained in the step (2), controlling the rotating speed at 30-100r/min, and stirring for 10-25min to obtain the xanthan gum.
Preferably, the water is purified water, and the pH value is 7.0-8.0.
Preferably, the heating temperature in step (1) is 80 ℃.
Preferably, the stirring speed in the step (1) is 200r/min, and the stirring time is 15 min.
Preferably, the stirring speed in the step (2) is 100r/min, and the stirring time is 20 min.
Preferably, the stirring speed in the step (3) is 50r/min, and the stirring time is 25 min.
Compared with the prior art, the invention has the beneficial effects that:
the odor control agent integrates the advantages of the foaming agent and the liquid mulching film, firstly generates a large amount of foam after being sprayed, can quickly obstruct the contact between soil and ambient air, and inhibit the odor on the surface of the soil from diffusing to the ambient atmosphere, and gradually forms a compact polymer film structure on the surface of the soil under the action of the film forming agent along with the disappearance of the pores of the foam, so that the odor control agent can quickly and durably inhibit the odor from diffusing to the ambient atmosphere, has good effect of controlling the odor of the soil in a polluted site, and cannot generate new pollution.
Detailed Description
The invention is further described below in conjunction with specific embodiments, and the advantages and features of the invention will become more apparent as the description proceeds. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Example 1
The polluted site odor control agent comprises the following components in percentage by weight:
15% of polyvinyl alcohol, 2% of soluble starch, 2% of ammonium chloride, 4% of sodium dodecyl benzene sulfonate sulfate, 2% of sodium dodecyl sulfate, 2% of xanthan gum and 73% of water.
The polluted site odor control agent is prepared according to the following steps:
(1) heating a proper amount of water to 80 ℃, adding polyvinyl alcohol and soluble starch into the water, uniformly stirring at a rotation speed of 200r/min, and stirring for 15 min;
(2) sequentially adding ammonium chloride, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate into the mixed solution obtained in the step (1) and stirring at the rotating speed of 100r/min for 20 min;
(3) and (3) sequentially adding xanthan gum and the rest water into the mixed solution obtained in the step (2), controlling the rotating speed at 50r/min, and stirring for 25min to obtain the xanthan gum.
Example 2
The polluted site odor control agent comprises the following components in percentage by weight:
10% of polyvinyl alcohol, 1% of soluble starch, 1% of ammonium chloride, 3% of sodium dodecyl benzene sulfonate sulfate, 1% of sodium dodecyl sulfate, 1% of xanthan gum and 82% of water.
The polluted site odor control agent is prepared according to the following steps:
(1) heating a proper amount of water to 70 ℃, adding polyvinyl alcohol and soluble starch into the water, uniformly stirring at the rotating speed of 100r/min for 10 min;
(2) sequentially adding ammonium chloride, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate into the mixed solution obtained in the step (1) and stirring at the rotating speed of 50r/min for 10 min;
(3) and (3) sequentially adding xanthan gum and the rest water into the mixed solution obtained in the step (2), controlling the rotating speed at 30r/min, and stirring for 10min to obtain the xanthan gum.
Example 3
The polluted site odor control agent comprises the following components in percentage by weight:
20% of polyvinyl alcohol, 2% of soluble starch, 2% of ammonium chloride, 5% of sodium dodecyl benzene sulfonate sulfate, 3% of sodium dodecyl sulfate, 2% of xanthan gum and 66% of water.
The polluted site odor control agent is prepared according to the following steps:
(1) heating a proper amount of water to 90 ℃, adding polyvinyl alcohol and soluble starch into the water, uniformly stirring at a rotation speed of 1500r/min for 20 min;
(2) sequentially adding ammonium chloride, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate into the mixed solution obtained in the step (1) and stirring at the rotating speed of 200r/min for 25 min;
(3) and (3) sequentially adding xanthan gum and the rest water into the mixed solution obtained in the step (2), controlling the rotating speed at 100r/min, and stirring for 25min to obtain the xanthan gum.
Experimental example 1 Effect experiment
Purpose of the experiment: the peculiar smell control effect of the peculiar smell control agent on the polluted soil is verified.
Experiment design: the odor of the polluted soil using the odor control agent and not using the odor control agent is detected by a volatile organic compound gas detector (PID), and the effect of the odor inhibitor is verified by a contrast experiment.
And (3) experimental operation: the experimental soil is selected from volatile organic compound polluted soil of certain Tianjin plot. 3 parts of 300g of polluted soil are respectively put into 3 500ml beakers, the odor control agents (EG-1 and EG-2 in experiment numbers) in the embodiment 1 with the thickness of 1cm and 2cm are respectively sprayed on the surfaces of 2 of the beakers, the other beakers are not treated (CK in experiment numbers), then the beakers are covered by preservative films, the concentration of volatile organic compounds is detected by PID at intervals, and the foam duration time and the film forming effect are observed.
The experimental results are as follows:
(1) PID value
TABLE 1 PID values of different time and sprayed film thickness (mg/m) 3 )
Figure BDA0002892352300000041
(2) Foam duration and film formation time
The foam with the thickness of 1cm lasts for about 6 hours, the film forming time is about 30min, the film is gradually formed along with the disappearance of the foam, and the film is completely formed 30min after the defoaming; the foam with the thickness of 2cm lasts for about 8.5h, the film forming time is about 30min, the film is gradually formed along with the disappearance of the foam, and the film is completely formed 30min after the defoaming.
Comparative experiment
Purpose of the experiment: compared with the prior art, the odor control agent disclosed by the invention has a quicker and more lasting odor control effect.
Experiment design: two existing odor control agents in the market at present are selected to carry out a comparison experiment with the odor control agent, the selected market odor control agents are respectively a Foshan soil repairing odor control agent (a soil repairing odor control agent for a cleaner) and a Shanghai soil repairing odor control agent (a soil repairing odor control agent for a fine water cut), the Foshan soil repairing odor control agent is a foam odor control agent, the Shanghai soil repairing odor control agent is a nano-film odor control agent, and a volatile organic gas detector (PID) is used for detecting odor control effects after different odor control agents are sprayed.
And (3) experimental operation: the experimental soil is volatile organic compound polluted soil of certain Tianjin land. Respectively putting 4 parts of 300g of polluted soil into 4 500ml beakers, respectively spraying the odor control agent with the thickness of 2cm in example 1, the odor control agent for repairing certain soil in a Foshan with the thickness of 2cm, the odor control agent for repairing certain soil in Shanghai for 2 times (the experiment numbers are EG-1, EG-2 and EG-3 respectively), and the other one is not processed (the experiment number is CK), then covering the mouth of the beaker with a preservative film, detecting the concentration of volatile organic compounds by using PID at intervals, and observing the foam duration and the film forming effect.
The experimental results are as follows:
(1) PID value
TABLE 2 PID values (mg/m) of various time and odor control agents 3 )
Figure BDA0002892352300000051
(2) Foam duration and film formation time
The foam duration of the odor control agent in example 1 is about 8.5h, the film forming time is about 30min, and as the foam disappears, the film is gradually formed and is completely formed 30min after the foam is removed; the foam duration of the soil restoration odor control agent in the Foshan mountain is about 8 hours; the membrane forming time of the peculiar smell control agent for restoring certain soil in the Shanghai is 30-1 h.

Claims (9)

1. The pollution site odor control agent is characterized by comprising the following components in percentage by weight: 10-20% of polyvinyl alcohol, 1-2% of soluble starch, 1-2% of ammonium chloride, 3-5% of sodium dodecyl benzene sulfonate sulfate, 1-3% of sodium dodecyl sulfate, 1-2% of xanthan gum and the balance of water.
2. The pollution site odor control agent according to claim 1, which comprises the following components by weight percent: 15% of polyvinyl alcohol, 2% of soluble starch, 2% of ammonium chloride, 4% of sodium dodecyl benzene sulfonate sulfate, 2% of sodium dodecyl sulfate, 2% of xanthan gum and 73% of water.
3. The contaminated site odor control agent according to claim 1, wherein said water is purified water having a pH of 7.0 to 8.0.
4. A method for preparing an odor controlling agent for contaminated sites according to claim 1 or 2, comprising the steps of:
(1) heating a proper amount of water to 70-90 ℃, adding polyvinyl alcohol and soluble starch into the water, uniformly stirring at the rotation speed of 100-;
(2) sequentially adding ammonium chloride, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate into the mixed solution obtained in the step (1) and stirring at the rotating speed of 50-200r/min for 10-25 min;
(3) and (3) sequentially adding xanthan gum and the rest water into the mixed solution obtained in the step (2), controlling the rotating speed at 30-100r/min, and stirring for 10-25min to obtain the xanthan gum.
5. The method according to claim 4, wherein the water is purified water and has a pH of 7.0 to 8.0.
6. The production method according to claim 4, wherein the heating temperature in the step (1) is 80 ℃.
7. The production method according to claim 4, wherein the stirring speed in the step (1) is 200r/min and the stirring time is 15 min.
8. The production method according to claim 4, wherein the stirring speed in the step (2) is 100r/min and the stirring time is 20 min.
9. The production method according to claim 4, wherein the stirring speed in the step (3) is 50r/min and the stirring time is 25 min.
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