CN112591992A - Filling medium for permeable reactive barrier and preparation method thereof - Google Patents
Filling medium for permeable reactive barrier and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
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- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
- C02F2003/003—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms using activated carbon or the like
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
Abstract
The invention belongs to the technical field of permeable reactive barrier, and discloses a filling medium for a permeable reactive barrier and a preparation method thereof.A mounting frame is installed, a U-shaped support is fixed in the mounting frame, a filter layer is arranged between the U-shaped support and the mounting frame, and the inside of the U-shaped support is filled with the medium; preparing a filling medium, uniformly stirring a solid-phase carbon source, a biomembrane carrier, activated carbon particles and zeolite according to a certain mass ratio, and sieving; after stirring and sieving are completed, adding ferric hydroxide and aluminosilicate into the mixture obtained in the second step to obtain a filling medium; and adding the prepared filling medium into the U-shaped support according to corresponding stages and oxidizing. The invention takes the uniform mixture of the polyhydroxyalkanoate and the ceramsite as the filling medium of the permeable biological reaction wall, the raw materials are easy to obtain, the process is simple, the polyhydroxyalkanoate and the ceramsite can be simply and uniformly mixed (the mixture should contain a solid-phase carbon source, a biological membrane carrier, activated carbon particles and zeolite), and the requirements on operation and management are low.
Description
Technical Field
The invention belongs to the permeable reactive barrier and the technical field, and particularly relates to a filling medium for a permeable reactive barrier and a preparation method thereof.
Background
At present, nitrate pollution of underground water is more serious, and drinking nitrate-polluted underground water can cause the probability that infants suffer from methemoglobinemia and adults suffer from cancer to be increased. At present, the method for removing nitrate in underground water at home and abroad mainly comprises a physical method, a chemical reduction method and a biological denitrification method.
The nitrate removal by physical methods is usually ex situ treatment, and has a series of defects of time consumption, high cost, difficult operation and the like, and the nitrate is not completely removed in practice, but only the transfer or concentration of nitrate pollutants occurs.
Chemical denitrification processes are generally classified into two major types, active metal reduction processes and catalytic denitrification processes. In the active metal reduction method, the nitrate reduction conditions of metallic iron or ferrous iron and the like are difficult to control, and byproducts are easy to generate; the method for chemically and catalytically reducing nitrate mainly comprises the step of carrying a noble metal Pd-Sn and other catalysts on a porous medium to catalytically reduce nitrate in water. However, the technology for removing nitrate by the chemical catalysis method is not suitable for removing nitrate in situ and has high treatment cost.
Through the above analysis, the problems and defects of the prior art are as follows:
(1) the physical method has a series of defects of time consumption, high cost, difficult operation and the like.
(2) Chemical denitrification processes are not suitable for in situ nitrate removal and are expensive to process.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a filling medium for a permeable reactive barrier and a preparation method thereof.
The invention is realized in such a way that a method for preparing a filling medium for a permeable reactive barrier comprises the following steps:
the method comprises the following steps that firstly, a mounting frame is mounted, a U-shaped support is fixed inside the mounting frame, a filter layer is arranged between the U-shaped support and the mounting frame, and media are filled inside the U-shaped support;
step two, preparing a filling medium, uniformly stirring the solid-phase carbon source, the biomembrane carrier, the activated carbon particles and the zeolite according to a certain mass ratio, and sieving;
step three, after stirring and sieving, adding ferric hydroxide and aluminosilicate into the mixture obtained in the step two to obtain a filling medium;
step four, adding the prepared filling medium into the U-shaped support according to corresponding stages; and carrying out oxidation;
in the second step, the preparation method of the activated carbon particles comprises the following steps:
crushing wood and coal in the raw materials for producing the activated carbon;
heating the pulverized mixture under certain conditions, and using air, oxygen and other gases as oxidant; during the oxidation, a catalyst is added;
after the oxidation is finished, introducing an organic polymer into the space in the inorganic template and carbonizing the organic polymer;
dissolving the template by using strong acid to prepare a porous carbon material similar to the spatial structure of the inorganic template;
the process of crushing the wood and the coal comprises the following steps:
sieving impurities in wood and coal; after the sieving is finished, putting the wood and the coal into a crusher;
the motor drives the main shaft and the turbine to rotate at high speed, and the turbine and the grinding block on the screen ring form a crushing and grinding pair;
when wood and coal materials enter the machine cavity from the charging hopper, the materials entering the machine cavity are tightly rubbed and strongly impacted on the inner edge of the blade of the turbine in the rotating airflow and are ground again in a gap between the blade and the grinding block;
when broken, grinding material, the turbine inhales a large amount of air, cools off the machine, grinds material and conveying fines:
after wood and coal materials are crushed, the crushed materials pass through a vibrating screen; vibrating the vibrating screen through a vibrating motor, and sieving the crushed wood and coal;
in the third step, the preparation method of the ferric hydroxide comprises the following steps:
heating a certain amount of distilled water to boil;
adding 1-2 mL of saturated FeCl into boiling distilled water dropwise3A solution;
boiling, and stopping heating when the liquid is reddish brown;
in the third step, the preparation process of the aluminosilicate comprises the following steps:
selecting bauxite tailings as a raw material, and mixing and grinding the bauxite tailings; putting the mixture into a resistance furnace for roasting, taking out and cooling;
preparing dilute sulfuric acid, washing and filtering;
drying after washing and filtering; and grinding after drying.
Further, in the first step, the filter layer arranged between the U-shaped support and the mounting rack is a filter screen.
Further, in the second step, the zeolite can be analcime, chabazite, scolecite, heulandite, natrolite, mordenite and stilbite.
Further, in the second step, the biological carrier can be a bio-based carrier, a biological membrane module, a Chuanben grass and an artificial aquatic grass, and all the biological carrier is made of high polymer materials.
Further, the biological carrier removes organic matters, and the carrier surface is utilized to adsorb, biologically oxidize and decompose the organic matters or convert the organic matters into microorganism components, so that BOD in the water body is removed;
SS is removed, and the suspended matters collide with the biological carrier to promote full sedimentation;
removing nitrogen and phosphorus, and dissolving oxygen gradient to form A/O environment and material pores.
Further, in the second step, the solid-phase organic carbon source is a mixture of one or more degradable polymers; the degradable polymer is one or a mixture of a plurality of polybutylene succinate, polyhydroxybutyrate-valerate or polycaprolactone.
Further, in the third step, the mass ratio of the ferric hydroxide to the aluminosilicate is 0.3-0.6.
Further, in the fourth step, curing conditions are all 80% -95% of humidity and curing for 7-21 days at 20-40 ℃.
The invention also aims to provide a filling medium for the permeable reactive barrier prepared by the preparation method of the filling medium for the permeable reactive barrier, wherein the filling medium for the permeable reactive barrier is prepared from a solid-phase carbon source, a biological membrane carrier, activated carbon particles and zeolite according to a mass ratio of 130: 2800: 75: 7;
the filling medium for the permeable reactive barrier further comprises; iron hydroxide, aluminosilicate.
Further, the solid-phase carbon source is polyhydroxyalkanoate, and the biomembrane carrier is ceramsite and polyhydroxyalkanoate.
By combining all the technical schemes, the invention has the advantages and positive effects that: the invention takes the uniform mixture of the polyhydroxyalkanoate and the ceramsite as the filling medium of the permeable biological reaction wall, the raw materials are easy to obtain, the process is simple, the polyhydroxyalkanoate and the ceramsite can be simply and uniformly mixed, and the requirements on operation and management are low; the polyhydroxyalkanoate is used as a fixed carbon source for treating nitrate pollutants in underground water, so that the rapid activation of microorganisms can be realized without adding an additional carbon source; the method has the advantages of low cost, long service life, small secondary pollution and difficult blockage of the aquifer. Compared with the traditional filling type permeable reactive barrier, the permeable reactive barrier prepared by the invention is a non-filling type permeable reactive barrier, has an integral structure, can be directly used, avoids the problem that the traditional filling type permeable reactive barrier needs to be filled, loaded and other complex operations before use, and has low density, and is convenient to transport, install and disassemble. The active carbon in the invention has narrow pore size distribution and high selective adsorption. In the preparation method of the active carbon particles, during the process of crushing wood and coal in the active carbon production raw materials, dust can be effectively prevented from entering the bearing cavity, so that the service life of the bearing is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, but the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method for manufacturing a permeable reactive barrier with filling medium for permeable reactive barrier according to an embodiment of the present invention.
Fig. 2 is a flow chart of a method for preparing activated carbon particles according to an embodiment of the present invention.
FIG. 3 is a flow chart of a method for pulverizing wood and coal according to an embodiment of the present invention.
FIG. 4 is a flow chart of a method for preparing ferric hydroxide according to an embodiment of the present invention.
FIG. 5 is a flow chart of a method for preparing an aluminosilicate provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a filling medium for a permeable reactive barrier and a preparation method thereof, and the invention is described in detail with reference to the accompanying drawings.
The filling medium for the permeable reactive barrier provided by the embodiment of the invention is prepared from a solid-phase carbon source, a biological membrane carrier, activated carbon particles and zeolite according to a mass ratio of 130: 2800: 75: 7; the filling medium for the permeable reactive barrier further comprises; iron hydroxide, aluminosilicate; the solid-phase carbon source is polyhydroxyalkanoate, and the biomembrane carrier is ceramsite and polyhydroxyalkanoate.
The preparation method of the filling medium for the permeable reactive barrier provided by the embodiment of the invention comprises the following steps:
s101: the installation mounting bracket, at the inside fixed U type of mounting bracket support, set up the filter layer between U type support and mounting bracket, support inside packing medium at the U type.
S102: preparing a filling medium, uniformly stirring the solid-phase carbon source, the biomembrane carrier, the activated carbon particles and the zeolite according to a certain mass ratio, and sieving.
S103: and after stirring and sieving are completed, adding ferric hydroxide and aluminosilicate into the mixture obtained in the second step to obtain the filling medium.
S104: adding the prepared filling medium into the U-shaped support according to corresponding stages; and oxidation is carried out.
In S102 provided by the embodiment of the present invention, a method for preparing activated carbon particles includes:
s201: the wood and coal in the raw materials for producing the active carbon are crushed.
S202: heating the pulverized mixture under certain conditions, and using air, oxygen and other gases as oxidant; during the oxidation, a catalyst is added.
S203: after the oxidation is completed, the organic polymer is introduced into the space in the inorganic template and carbonized.
S204: and dissolving the template by using strong acid to prepare the porous carbon material similar to the spatial structure of the inorganic template.
The process for crushing wood and coal provided by the embodiment of the invention comprises the following steps:
s301: sieving impurities in wood and coal; after the sieving is finished, putting the wood and the coal into a crusher;
s302: the motor drives the main shaft and the turbine to rotate at high speed, and the turbine and the grinding block on the screen ring form a crushing and grinding pair;
s303: when wood and coal materials enter the machine cavity from the charging hopper, the materials entering the machine cavity are tightly rubbed and strongly impacted on the inner edge of the blade of the turbine in the rotating airflow and are ground again in a gap between the blade and the grinding block;
s304: when broken, grinding material, the turbine inhales a large amount of air, cools off the machine, grinds material and conveying fines:
s305: after wood and coal materials are crushed, the crushed materials pass through a vibrating screen; and vibrating the vibrating screen through a vibrating motor, and screening the crushed wood and coal.
In S103 provided by the embodiment of the present invention, a method for preparing iron hydroxide includes:
s401: heating a certain amount of distilled water to boil;
s402: adding 1-2 mL of saturated FeCl into boiling distilled water dropwise3A solution;
s403: boiling, and stopping heating when the liquid is reddish brown.
In S103 provided by the embodiment of the present invention, the process for preparing the aluminosilicate is as follows:
s501: selecting bauxite tailings as a raw material, and mixing and grinding the bauxite tailings; putting the mixture into a resistance furnace for roasting, taking out and cooling;
s502: preparing dilute sulfuric acid, washing and filtering;
s503: drying after washing and filtering; and grinding after drying.
In S101 provided by the embodiment of the present invention, the filter layer disposed between the U-shaped support and the mounting frame is a filter screen.
In S102 provided in the embodiment of the present invention, the zeolite may be analcime, chabazite, scolecite, heulandite, natrolite, mordenite, stilbite.
In S102 provided by the embodiment of the present invention, the bio-carrier may be an ecological-based carrier, a bio-membrane module, a herbal medicine and an artificial aquatic plant, and all of them are made of a polymer material.
The biological carrier removes organic matters, and the carrier surface is utilized to adsorb, biologically oxidize and decompose the organic matters or convert the organic matters into microorganism components, thereby removing BOD in the water body;
SS is removed, and the suspended matters collide with the biological carrier to promote full sedimentation;
removing nitrogen and phosphorus, and dissolving oxygen gradient to form A/O environment and material pores.
In S102 provided in the embodiment of the present invention, the solid-phase organic carbon source is a mixture of one or more degradable polymers; the degradable polymer is one or a mixture of a plurality of polybutylene succinate, polyhydroxybutyrate-valerate or polycaprolactone.
In S103 provided by the embodiment of the invention, the mass ratio of the ferric hydroxide to the aluminosilicate is 0.3-0.6.
In S104 provided by the embodiment of the invention, curing conditions are all 80-95% humidity and curing is carried out for 7-21 days at 20-40 ℃.
Another object of the present invention is to provide a method for in situ removal of nitrate contaminants from groundwater by providing a permeable reactive barrier constructed from the packing medium of claim 1 on a vertical path of influent and effluent water of groundwater contaminated with nitrate; the thickness of the permeable reactive barrier is 10-40 cm; the hydraulic retention time of the underground water polluted by the nitrate in the permeable reaction wall is 2.6-5.2 hours.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention disclosed herein, which is within the spirit and principle of the present invention, should be covered by the present invention.
Claims (10)
1. A preparation method of a filling medium for a permeable reactive barrier is characterized by comprising the following steps:
the method comprises the following steps that firstly, a mounting frame is mounted, a U-shaped support is fixed inside the mounting frame, a filter layer is arranged between the U-shaped support and the mounting frame, and media are filled inside the U-shaped support;
step two, preparing a filling medium, uniformly stirring the solid-phase carbon source, the biomembrane carrier, the activated carbon particles and the zeolite according to a certain mass ratio, and sieving;
step three, after stirring and sieving, adding ferric hydroxide and aluminosilicate into the mixture obtained in the step two to obtain a filling medium;
step four, adding the prepared filling medium into the U-shaped support according to corresponding stages; and carrying out oxidation;
in the second step, the preparation method of the activated carbon particles comprises the following steps:
crushing wood and coal in the raw materials for producing the activated carbon;
heating the pulverized mixture under certain conditions, and using air, oxygen and other gases as oxidant; during the oxidation, a catalyst is added;
after the oxidation is finished, introducing an organic polymer into the space in the inorganic template and carbonizing the organic polymer;
dissolving the template by using strong acid to prepare a porous carbon material similar to the spatial structure of the inorganic template;
the process of crushing the wood and the coal comprises the following steps:
sieving impurities in wood and coal; after the sieving is finished, putting the wood and the coal into a crusher;
the motor drives the main shaft and the turbine to rotate at high speed, and the turbine and the grinding block on the screen ring form a crushing and grinding pair;
when wood and coal materials enter the machine cavity from the charging hopper, the materials entering the machine cavity are tightly rubbed and strongly impacted on the inner edge of the blade of the turbine in the rotating airflow and are ground again in a gap between the blade and the grinding block;
when broken, grinding material, the turbine inhales a large amount of air, cools off the machine, grinds material and conveying fines:
after wood and coal materials are crushed, the crushed materials pass through a vibrating screen; vibrating the vibrating screen through a vibrating motor, and sieving the crushed wood and coal;
in the third step, the preparation method of the ferric hydroxide comprises the following steps:
heating a certain amount of distilled water to boil;
to boilingDropwise adding 1-2 mL of saturated FeCl into the distilled water3A solution;
boiling, and stopping heating when the liquid is reddish brown;
in the third step, the preparation process of the aluminosilicate comprises the following steps:
selecting bauxite tailings as a raw material, and mixing and grinding the bauxite tailings; putting the mixture into a resistance furnace for roasting, taking out and cooling;
preparing dilute sulfuric acid, washing and filtering;
drying after washing and filtering; and grinding after drying.
2. A method for preparing a permeable reactive barrier according to claim 1, wherein in the first step, the filter layer disposed between the U-shaped support and the mounting frame is a filter net.
3. The method of claim 1 wherein in step two, the zeolite is selected from the group consisting of analcime, chabazite, scolecite, heulandite, natrolite, mordenite, stilbite.
4. A method for preparing a permeable reactive barrier according to claim 1, wherein in the second step, the bio-carrier is selected from the group consisting of bio-based carrier, bio-membrane module, Chuanben grass and artificial water grass, and is made of polymer material.
5. The method of claim 4, wherein the biological carrier removes organic substances, and the carrier surface is used to adsorb, biologically oxidize, decompose, or convert the organic substances into microbial components, thereby removing BOD from the water body;
SS is removed, and the suspended matters collide with the biological carrier to promote full sedimentation;
removing nitrogen and phosphorus, and dissolving oxygen gradient to form A/O environment and material pores.
6. The method for preparing a permeable reactive barrier according to claim 1, wherein in the second step, the solid-phase organic carbon source is a mixture of one or more degradable polymers; the degradable polymer is one or a mixture of a plurality of polybutylene succinate, polyhydroxybutyrate-valerate or polycaprolactone.
7. A method for preparing a permeable reactive barrier according to claim 1, wherein in the third step, the mass ratio of ferric hydroxide and aluminosilicate is 0.3-0.6.
8. A method for preparing a permeable reactive barrier according to claim 1, wherein in the fourth step, the curing conditions are 80% -95% humidity and 20-40 ℃ for 7-21 days.
9. The filling medium for the permeable reactive barrier prepared by the method for preparing the filling medium for the permeable reactive barrier according to any one of claims 1 to 8, wherein the filling medium for the permeable reactive barrier is prepared from a solid-phase carbon source, a biofilm carrier, activated carbon particles and zeolite in a mass ratio of 130: 2800: 75: 7;
the filling medium for the permeable reactive barrier further comprises; iron hydroxide, aluminosilicate.
10. The filling medium for the permeable reactive barrier of claim 9, wherein the solid carbon source is polyhydroxyalkanoate, and the biofilm carrier is ceramsite and polyhydroxyalkanoate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113185194A (en) * | 2021-04-27 | 2021-07-30 | 山东大学 | Porous permeable geopolymer material and preparation method and application thereof |
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