CN110564424A - Chemical polluted soil remediation composition and remediation method - Google Patents
Chemical polluted soil remediation composition and remediation method Download PDFInfo
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- CN110564424A CN110564424A CN201910868544.2A CN201910868544A CN110564424A CN 110564424 A CN110564424 A CN 110564424A CN 201910868544 A CN201910868544 A CN 201910868544A CN 110564424 A CN110564424 A CN 110564424A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
- B09C1/065—Reclamation of contaminated soil thermally by pyrolysis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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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
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
Abstract
The invention discloses a chemical polluted soil restoration composition and a restoration method, and the formula comprises: monopotassium phosphate, ammonium humate, monocalcium phosphate, yeast waste liquid, bentonite, an adhesive, a photosensitizer and a light quenching agent; the repairing method comprises the following steps of preparing a repairing composition; step two, soil screening; step three, putting the soil into a kiln; step four, spraying soil; step five, solid-liquid separation; step six, soil backfilling; the method comprises the steps of screening and calcining the polluted soil in a kiln, and treating volatile substances in the soil; and the prepared spraying liquid is utilized to remove the solvent pollution in the soil, nutrients are added in the soil, the growth of plants in the later period of soil planting is facilitated, the soil remediation is facilitated, meanwhile, the yeast waste liquid of the remediation composition can obviously promote the degradation of petroleum hydrocarbon compounds, the light stability of pollutants can be changed, and the photolysis of the pollutants is accelerated or delayed.
Description
Technical Field
the invention relates to the technical field of soil remediation, in particular to a chemical contaminated soil remediation composition and a remediation method.
background
the soil is a loose surface layer having fertility on the surface of the land and capable of growing plants, and the thickness thereof is generally about 2 m. The soil not only provides mechanical support capability for plant growth, but also provides fertility factors such as water, fertilizer, gas, heat and the like required by the growth and development of the plant. As the population is rapidly increased and the industry is rapidly developed, solid wastes are continuously stacked and dumped on the surface of soil, harmful waste water continuously permeates into the soil, and harmful gas and floating dust in the atmosphere continuously fall into the soil along with rainwater, so that the soil pollution is caused. Therefore, the clean and safe utilization of soil pollution becomes an urgent problem to be solved, and therefore, it is necessary to design a chemical polluted soil remediation composition and a remediation method.
disclosure of Invention
The invention aims to provide a chemical polluted soil remediation composition and a remediation method, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: a chemical contaminated soil remediation composition comprises the following components in percentage by weight: the light-sensitive adhesive comprises potassium dihydrogen phosphate, ammonium humate, monocalcium phosphate, yeast waste liquid, bentonite, an adhesive, a photosensitizer and a light quenching agent, wherein the components in parts by weight are as follows: 20-33 parts of monopotassium phosphate, 30-40 parts of ammonium humate, 20-35 parts of monocalcium phosphate, 20-35 parts of yeast waste liquid, 8-15 parts of bentonite, 0.1-0.5 part of adhesive, 1-2 parts of photosensitizer and 1-2 parts of light quencher.
A chemical contaminated soil remediation method comprises the following steps of preparing a remediation composition; step two, soil screening; step three, putting the soil into a kiln; step four, spraying soil; step five, solid-liquid separation; step six, soil backfilling;
in the first step, the preparation of the repair composition comprises the following steps:
1) the weight percentage of each component is as follows: selecting 20-33 parts of monopotassium phosphate, 30-40 parts of ammonium humate, 20-35 parts of monocalcium phosphate, 20-35 parts of yeast waste liquid, 8-15 parts of bentonite, 0.1-0.5 part of adhesive, 1-2 parts of photosensitizer and 1-2 parts of light quencher;
2) crushing monopotassium phosphate, ammonium humate and monocalcium phosphate into powder of 30-60 meshes, adding bentonite, uniformly mixing, and finally adding yeast waste liquid, adhesive, photosensitizer and light quencher, and uniformly mixing for later use;
3) extruding and granulating the composition by a granulator, drying and packaging for later use;
In the second step, the polluted soil is excavated and then is screened to remove impurities with the diameter of more than 5cm for later use;
Wherein in the third step, the step of putting the soil into the kiln comprises the following steps:
1) Putting the screened polluted soil into a rotary kiln to be calcined for 1-2h at the temperature of 450-500 ℃, continuously stirring during calcination, discharging and cooling for later use after calcination is finished;
2) the non-contact smoke generated in the calcining process is directly discharged into the atmosphere, the tail gas is sequentially treated by using a washer, a venturi tube and a spray tower, and then is discharged after being treated in an active carbon and high-efficiency air particle filter;
in the fourth step, 5kg of water is added into the restoration composition obtained in the first step according to a bag of restoration composition, spraying liquid is prepared, and the spraying liquid is sprayed on the calcined soil;
in the fifth step, a micelle reinforced ultrafiltration device is used for removing redundant water so that the soil humidity is 17-44%;
And in the sixth step, backfilling the treated soil back to the original excavation pit.
according to the technical scheme, the photosensitizer is one of benzophenone and benzoin dimethyl ether.
According to the technical scheme, the light quencher is one of AM-101 and NBC.
According to the technical scheme, the adhesive is any one of sodium carboxymethylcellulose, polyacrylate, polyvinyl acetate, polyvinyl acetal and polyvinylpyrrolidone.
according to the technical scheme, in the step one 2), the raw materials are added and mixed under the condition of keeping out of the sun.
according to the technical scheme, in the step one 3), the packaging specification of the composition is 50 g/bag.
According to the technical scheme, in the fourth step, the spraying temperature is 35 ℃, the stirring intensity is 320r/min, and the leaching time is 3-4 h.
Compared with the prior art, the invention has the following beneficial effects: the chemical polluted soil restoration composition and the restoration method thereof are characterized in that the polluted soil is filtered and then calcined in a kiln, and volatile substances in the soil are treated; and the prepared spraying liquid is utilized to remove the solvent pollution in the soil, nutrients are added in the soil, the growth of plants in the later period of soil planting is facilitated, the soil remediation is facilitated, meanwhile, the yeast waste liquid of the remediation composition can obviously promote the degradation of petroleum hydrocarbon compounds, the light stability of pollutants can be changed, and the photolysis of the pollutants is accelerated or delayed.
drawings
the accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
referring to fig. 1, the present invention provides a technical solution:
example 1:
A chemical contaminated soil remediation composition comprises the following components in percentage by weight: the light-sensitive adhesive comprises potassium dihydrogen phosphate, ammonium humate, monocalcium phosphate, yeast waste liquid, bentonite, an adhesive, a photosensitizer and a light quenching agent, wherein the components in parts by weight are as follows: 25 parts of monopotassium phosphate, 35 parts of ammonium humate, 28 parts of monocalcium phosphate, 28 parts of yeast waste liquid, 12 parts of bentonite, 0.3 part of adhesive, 1 part of photosensitizer and 1 part of light quencher.
A chemical contaminated soil remediation method comprises the following steps of preparing a remediation composition; step two, soil screening; step three, putting the soil into a kiln; step four, spraying soil; step five, solid-liquid separation; step six, soil backfilling;
in the first step, the preparation of the repair composition comprises the following steps:
1) the weight percentage of each component is as follows: selecting 25 parts of monopotassium phosphate, 35 parts of ammonium humate, 28 parts of monocalcium phosphate, 28 parts of yeast waste liquid, 12 parts of bentonite, 0.3 part of adhesive, 1 part of photosensitizer and 1 part of light quencher;
2) crushing monopotassium phosphate, ammonium humate and monocalcium phosphate into powder of 30-60 meshes, adding bentonite, uniformly mixing, finally adding yeast waste liquid, adhesive, photosensitizer and light quencher, uniformly mixing for later use, adding the raw materials, and mixing in a dark state;
3) extruding and granulating the composition by using a granulator, drying and packaging for later use, wherein the packaging specification of the composition is 50 g/bag;
In the second step, the polluted soil is excavated and then is screened to remove impurities with the diameter of more than 5cm for later use;
Wherein in the third step, the step of putting the soil into the kiln comprises the following steps:
2) putting the screened polluted soil into a rotary kiln to be calcined for 1-2h at the temperature of 450-500 ℃, continuously stirring during calcination, discharging and cooling for later use after calcination is finished;
2) The non-contact smoke generated in the calcining process is directly discharged into the atmosphere, the tail gas is sequentially treated by using a washer, a venturi tube and a spray tower, and then is discharged after being treated in an active carbon and high-efficiency air particle filter;
In the fourth step, 5kg of water is added into the restoration composition obtained in the first step according to a bag of restoration composition, spraying liquid is prepared, the spraying liquid is sprayed on the calcined soil, the spraying temperature is 35 ℃, the stirring intensity is 320r/min, and the leaching time is 3-4 h;
In the fifth step, a micelle reinforced ultrafiltration device is used for removing redundant water so that the soil humidity is 17-44%;
and in the sixth step, backfilling the treated soil back to the original excavation pit.
Wherein the photosensitizer is benzophenone; the light quenching agent is AM-101; the adhesive is sodium carboxymethyl cellulose.
example 2:
A chemical contaminated soil remediation composition comprises the following components in percentage by weight: the light-sensitive adhesive comprises potassium dihydrogen phosphate, ammonium humate, monocalcium phosphate, yeast waste liquid, bentonite, an adhesive, a photosensitizer and a light quenching agent, wherein the components in parts by weight are as follows: 25 parts of monopotassium phosphate, 35 parts of ammonium humate, 28 parts of monocalcium phosphate, 28 parts of yeast waste liquid, 12 parts of bentonite, 0.3 part of adhesive, 1 part of photosensitizer and 1 part of light quencher.
a chemical contaminated soil remediation method comprises the following steps of preparing a remediation composition; step two, soil screening; step three, putting the soil into a kiln; step four, spraying soil; step five, solid-liquid separation; step six, soil backfilling;
in the first step, the preparation of the repair composition comprises the following steps:
1) the weight percentage of each component is as follows: selecting 25 parts of monopotassium phosphate, 35 parts of ammonium humate, 28 parts of monocalcium phosphate, 28 parts of yeast waste liquid, 12 parts of bentonite, 0.3 part of adhesive, 1 part of photosensitizer and 1 part of light quencher;
2) crushing monopotassium phosphate, ammonium humate and monocalcium phosphate into powder of 30-60 meshes, adding bentonite, uniformly mixing, finally adding yeast waste liquid, adhesive, photosensitizer and light quencher, uniformly mixing for later use, adding the raw materials, and mixing in a dark state;
3) Extruding and granulating the composition by using a granulator, drying and packaging for later use, wherein the packaging specification of the composition is 50 g/bag;
in the second step, the polluted soil is excavated and then is screened to remove impurities with the diameter of more than 5cm for later use;
wherein in the third step, the step of putting the soil into the kiln comprises the following steps:
3) putting the screened polluted soil into a rotary kiln to be calcined for 1-2h at the temperature of 450-500 ℃, continuously stirring during calcination, discharging and cooling for later use after calcination is finished;
2) The non-contact smoke generated in the calcining process is directly discharged into the atmosphere, the tail gas is sequentially treated by using a washer, a venturi tube and a spray tower, and then is discharged after being treated in an active carbon and high-efficiency air particle filter;
in the fourth step, 5kg of water is added into the restoration composition obtained in the first step according to a bag of restoration composition, spraying liquid is prepared, the spraying liquid is sprayed on the calcined soil, the spraying temperature is 35 ℃, the stirring intensity is 320r/min, and the leaching time is 3-4 h;
in the fifth step, a micelle reinforced ultrafiltration device is used for removing redundant water so that the soil humidity is 17-44%;
and in the sixth step, backfilling the treated soil back to the original excavation pit.
Wherein the photosensitizer is benzophenone; the light quenching agent is NBC; the adhesive is sodium carboxymethyl cellulose.
Example 3:
a chemical contaminated soil remediation composition comprises the following components in percentage by weight: the light-sensitive adhesive comprises potassium dihydrogen phosphate, ammonium humate, monocalcium phosphate, yeast waste liquid, bentonite, an adhesive, a photosensitizer and a light quenching agent, wherein the components in parts by weight are as follows: 25 parts of monopotassium phosphate, 35 parts of ammonium humate, 28 parts of monocalcium phosphate, 28 parts of yeast waste liquid, 12 parts of bentonite, 0.3 part of adhesive, 1 part of photosensitizer and 1 part of light quencher.
a chemical contaminated soil remediation method comprises the following steps of preparing a remediation composition; step two, soil screening; step three, putting the soil into a kiln; step four, spraying soil; step five, solid-liquid separation; step six, soil backfilling;
in the first step, the preparation of the repair composition comprises the following steps:
1) the weight percentage of each component is as follows: selecting 25 parts of monopotassium phosphate, 35 parts of ammonium humate, 28 parts of monocalcium phosphate, 28 parts of yeast waste liquid, 12 parts of bentonite, 0.3 part of adhesive, 1 part of photosensitizer and 1 part of light quencher;
2) Crushing monopotassium phosphate, ammonium humate and monocalcium phosphate into powder of 30-60 meshes, adding bentonite, uniformly mixing, finally adding yeast waste liquid, adhesive, photosensitizer and light quencher, uniformly mixing for later use, adding the raw materials, and mixing in a dark state;
3) extruding and granulating the composition by using a granulator, drying and packaging for later use, wherein the packaging specification of the composition is 50 g/bag;
in the second step, the polluted soil is excavated and then is screened to remove impurities with the diameter of more than 5cm for later use;
Wherein in the third step, the step of putting the soil into the kiln comprises the following steps:
4) putting the screened polluted soil into a rotary kiln to be calcined for 1-2h at the temperature of 450-500 ℃, continuously stirring during calcination, discharging and cooling for later use after calcination is finished;
2) The non-contact smoke generated in the calcining process is directly discharged into the atmosphere, the tail gas is sequentially treated by using a washer, a venturi tube and a spray tower, and then is discharged after being treated in an active carbon and high-efficiency air particle filter;
in the fourth step, 5kg of water is added into the restoration composition obtained in the first step according to a bag of restoration composition, spraying liquid is prepared, the spraying liquid is sprayed on the calcined soil, the spraying temperature is 35 ℃, the stirring intensity is 320r/min, and the leaching time is 3-4 h;
In the fifth step, a micelle reinforced ultrafiltration device is used for removing redundant water so that the soil humidity is 17-44%;
and in the sixth step, backfilling the treated soil back to the original excavation pit.
wherein the photosensitizer is benzoin dimethyl ether; the light quenching agent is AM-101; the adhesive is sodium carboxymethyl cellulose.
Example 4:
a chemical contaminated soil remediation composition comprises the following components in percentage by weight: the light-sensitive adhesive comprises potassium dihydrogen phosphate, ammonium humate, monocalcium phosphate, yeast waste liquid, bentonite, an adhesive, a photosensitizer and a light quenching agent, wherein the components in parts by weight are as follows: 25 parts of monopotassium phosphate, 35 parts of ammonium humate, 28 parts of monocalcium phosphate, 28 parts of yeast waste liquid, 12 parts of bentonite, 0.3 part of adhesive, 1 part of photosensitizer and 1 part of light quencher.
A chemical contaminated soil remediation method comprises the following steps of preparing a remediation composition; step two, soil screening; step three, putting the soil into a kiln; step four, spraying soil; step five, solid-liquid separation; step six, soil backfilling;
In the first step, the preparation of the repair composition comprises the following steps:
1) the weight percentage of each component is as follows: selecting 25 parts of monopotassium phosphate, 35 parts of ammonium humate, 28 parts of monocalcium phosphate, 28 parts of yeast waste liquid, 12 parts of bentonite, 0.3 part of adhesive, 1 part of photosensitizer and 1 part of light quencher;
2) crushing monopotassium phosphate, ammonium humate and monocalcium phosphate into powder of 30-60 meshes, adding bentonite, uniformly mixing, finally adding yeast waste liquid, adhesive, photosensitizer and light quencher, uniformly mixing for later use, adding the raw materials, and mixing in a dark state;
3) extruding and granulating the composition by using a granulator, drying and packaging for later use, wherein the packaging specification of the composition is 50 g/bag;
in the second step, the polluted soil is excavated and then is screened to remove impurities with the diameter of more than 5cm for later use;
wherein in the third step, the step of putting the soil into the kiln comprises the following steps:
5) putting the screened polluted soil into a rotary kiln to be calcined for 1-2h at the temperature of 450-500 ℃, continuously stirring during calcination, discharging and cooling for later use after calcination is finished;
2) the non-contact smoke generated in the calcining process is directly discharged into the atmosphere, the tail gas is sequentially treated by using a washer, a venturi tube and a spray tower, and then is discharged after being treated in an active carbon and high-efficiency air particle filter;
In the fourth step, 5kg of water is added into the restoration composition obtained in the first step according to a bag of restoration composition, spraying liquid is prepared, the spraying liquid is sprayed on the calcined soil, the spraying temperature is 35 ℃, the stirring intensity is 320r/min, and the leaching time is 3-4 h;
In the fifth step, a micelle reinforced ultrafiltration device is used for removing redundant water so that the soil humidity is 17-44%;
And in the sixth step, backfilling the treated soil back to the original excavation pit.
Wherein the photosensitizer is benzoin dimethyl ether; the light quenching agent is NBC; the adhesive is sodium carboxymethyl cellulose.
in conclusion, the polluted soil is filtered and then is calcined in the kiln, and volatile substances in the soil are treated; the prepared spraying liquid is utilized to remove the solvent pollution in the soil, nutrients are added in the soil, the growth of plants in the later period of soil planting is facilitated, the soil remediation is facilitated, meanwhile, the yeast waste liquid of the remediation composition can obviously promote the degradation of petroleum hydrocarbon compounds, the photosensitizer and the light quencher are respectively used as a carrier and an acceptor of light energy, the light stability of pollutants can be changed, and the photolysis of the pollutants is accelerated or delayed.
it is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. a chemical contaminated soil remediation composition comprises the following components in percentage by weight: monopotassium phosphate, ammonium humate, monocalcium phosphate, yeast waste liquid, bentonite, adhesive, photosensitizer and light quenching agent, and is characterized in that: the weight parts of the components are respectively as follows: 20-33 parts of monopotassium phosphate, 30-40 parts of ammonium humate, 20-35 parts of monocalcium phosphate, 20-35 parts of yeast waste liquid, 8-15 parts of bentonite, 0.1-0.5 part of adhesive, 1-2 parts of photosensitizer and 1-2 parts of light quencher.
2. a chemical contaminated soil remediation method comprises the following steps of preparing a remediation composition; step two, soil screening; step three, putting the soil into a kiln; step four, spraying soil; step five, solid-liquid separation; step six, soil backfilling; the method is characterized in that:
in the first step, the preparation of the repair composition comprises the following steps:
1) the weight percentage of each component is as follows: selecting 20-33 parts of monopotassium phosphate, 30-40 parts of ammonium humate, 20-35 parts of monocalcium phosphate, 20-35 parts of yeast waste liquid, 8-15 parts of bentonite, 0.1-0.5 part of adhesive, 1-2 parts of photosensitizer and 1-2 parts of light quencher;
2) Crushing monopotassium phosphate, ammonium humate and monocalcium phosphate into powder of 30-60 meshes, adding bentonite, uniformly mixing, and finally adding yeast waste liquid, adhesive, photosensitizer and light quencher, and uniformly mixing for later use;
3) extruding and granulating the composition by a granulator, drying and packaging for later use;
In the second step, the polluted soil is excavated and then is screened to remove impurities with the diameter of more than 5cm for later use;
wherein in the third step, the step of putting the soil into the kiln comprises the following steps:
putting the screened polluted soil into a rotary kiln to be calcined for 1-2h at the temperature of 450-500 ℃, continuously stirring during calcination, discharging and cooling for later use after calcination is finished;
2) The non-contact smoke generated in the calcining process is directly discharged into the atmosphere, the tail gas is sequentially treated by using a washer, a venturi tube and a spray tower, and then is discharged after being treated in an active carbon and high-efficiency air particle filter;
In the fourth step, 5kg of water is added into the restoration composition obtained in the first step according to a bag of restoration composition, spraying liquid is prepared, and the spraying liquid is sprayed on the calcined soil;
in the fifth step, a micelle reinforced ultrafiltration device is used for removing redundant water so that the soil humidity is 17-44%;
and in the sixth step, backfilling the treated soil back to the original excavation pit.
3. the chemical contaminated soil remediation composition of claim 1, wherein: the photosensitizer is one of benzophenone and benzoin dimethyl ether.
4. The chemical contaminated soil remediation composition of claim 1, wherein: the light quenching agent is one of AM-101 and NBC.
5. the chemical contaminated soil remediation composition of claim 1, wherein: the adhesive is any one of sodium carboxymethylcellulose, polyacrylate, polyvinyl acetate, polyvinyl acetal and polyvinylpyrrolidone.
6. the chemical contaminated soil remediation method of claim 2, wherein: in the step one 2), the raw materials are added and mixed under the condition of keeping out of the sun.
7. the chemical contaminated soil remediation method of claim 2, wherein: in the step one 3), the packaging specification of the composition is 50 g/bag.
8. the chemical contaminated soil remediation method of claim 2, wherein: in the fourth step, the spraying temperature is 35 ℃, the stirring intensity is 320r/min, and the leaching time is 3-4 h.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113210411A (en) * | 2021-04-27 | 2021-08-06 | 江苏科易达环保科技有限公司 | Heavy metal composite contaminated site soil remediation method |
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