CN114044571A - Permeable reactive barrier composite material and preparation method and application thereof - Google Patents
Permeable reactive barrier composite material and preparation method and application thereof Download PDFInfo
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- CN114044571A CN114044571A CN202111272984.5A CN202111272984A CN114044571A CN 114044571 A CN114044571 A CN 114044571A CN 202111272984 A CN202111272984 A CN 202111272984A CN 114044571 A CN114044571 A CN 114044571A
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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
- C02F3/28—Anaerobic digestion processes
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a permeable reactive barrier composite material for groundwater heavy metal pollution remediation and a preparation method and application thereof, the composite material comprises a high-permeability hard shell layer and a heavy metal remediation functional layer, wherein the high-permeability hard shell is prepared from an inorganic bonding material, plastic clay and a porous material containing microchannels, by mass, 22.3-32.9%: 50.1-66.9%: 10.7-20%, wherein the functional material of the heavy metal repairing functional layer is composed of an inorganic reducing agent, a natural organic carbon-releasing material, a carbonate mineral, biomass carbon and plastic clay according to the mass percentage of 5% -10%: 40% -50%: 10% -20%: 10%: 20 percent, the permeable reactive barrier composite material prepared by the invention can be applied to remediation of heavy metal polluted underground water, and the material has the advantages of low cost, no secondary pollution and simple preparation method, and has the potential of large-scale popularization and application.
Description
Technical Field
The invention relates to the field of in-situ remediation of polluted underground water, in particular to a permeable reactive barrier composite material for remediation of heavy metal pollution of underground water and application of a preparation method thereof.
Background
With the increase of industrial production activities, more and more heavy metals are generated, and the heavy metals enter a groundwater system through ways of atmospheric sedimentation, sewage irrigation and the like, so that the pollution of groundwater is aggravated, and the serious harm is caused to the human health and production and operation activities. From the current situation of heavy metal pollution of underground water in China, the method has the characteristics of wide pollution range, high pollution speed, serious pollution and the like, so that the metal pollution of the underground water becomes a threat factor which endangers the healthy life of human beings and hinders the sustainable development of social economy, and the treatment of the heavy metal pollution of the underground water is urgent.
At present, two main approaches for treating heavy metal underground water pollution are provided: firstly, the existing form of metal ions is changed into simple substances or compound precipitates, the stability of the metal ions is enhanced, and the mobility of the metal ions in the environment is reduced; another is to change the valence state of the metal ion to reduce its toxicity.
Aiming at the remediation of heavy metal pollution, the ectopic remediation technology is mainly a pumping-surface treatment technology. According to the statistics of the United states environmental protection agency, in the years of 1982-. But sometimes the tailing and bouncing phenomenon may occur and there is a problem in that the running cost is high. The in-situ remediation technology is used for in-situ remediation of polluted underground water without destroying the natural environment of soil and underground water, and has the advantages of low treatment cost, few surface treatment facilities and low environmental disturbance, and comprises a permeable reactive barrier technology, an in-situ electric remediation technology, an in-situ chemical remediation technology and an in-situ biological remediation technology. Permeable Reactive Barrier (PRB) technology in these in-situ repair technologies has the advantages of low operation cost, good repair effect and wide application range compared with other in-situ repair technologies, and therefore, people are receiving more and more attention.
The publication No. CN107473321A discloses a permeable reactive wall active material, which comprises the following components in percentage by weight: 20-40% of aluminum powder; 20-40% of iron powder; 30-40% of activated carbon;5-10% of zeolite; and the sum of the components is 100 percent; in addition, aluminum powder, iron powder, activated carbon and zeolite are mixed according to a specific proportion, and after the permeable reactive barrier is loaded, various heavy metal ions (Cr (VI) and Cd) in the acidic water body can be removed simultaneously2+、Cu2+、Zn2+) The effective period of the active material is 2-3 times that of the single zero-valent iron as the active material. Chinese patent with publication number CN111233069A discloses a permeable reactive barrier active material, which comprises modified iron powder, modified ferroferric oxide and modified medical stone, wherein the mass ratio of the modified iron powder to the modified ferroferric oxide to the modified medical stone is 1-2: 1-3: 1-9. After the material runs for 2 months, the removal rate of heavy metals Cd (II) and Cr (VI) is still more than 99%. However, the two materials are in loose powder structures, and the flow of groundwater can be blocked after long-term operation, so that the capability of repairing groundwater is lost. The document ' double-layer permeable reactive wall repair system and a preparation method and application thereof, PRB materials used by Mat Beidou and the like, ' flow rate and flow state numerical simulation _ wanning in permeable reactive wall bodies ' and the like overcome loose powdery structures, but the prepared PRB pellets do not distinguish a functional layer from an outer shell layer. The references, "research progress of PRB for repairing carbon source materials of nitrate-polluted groundwater" and "removal of nitrate in groundwater by simulating PRB with loofah sponge carbon source" all add and research carbon sources in wall materials, but the carbon sources used in the references have the defects of high release speed and difficulty in obtaining.
Disclosure of Invention
Aiming at the problems of high manufacturing cost, low activity and easiness in damage of the permeable reactive barrier composite material, the invention provides the permeable reactive barrier composite material for repairing heavy metal pollution of underground water and the preparation method thereof. The material has the characteristics of good removal effect and good economic applicability in the process of repairing the heavy metal polluted underground water.
Specifically, the invention is realized by the following technical scheme:
firstly, the application provides a permeable reactive barrier composite material which is of a spherical structure, wherein the spherical structure consists of a heavy metal repairing functional layer and a high-permeability hard shell layer wrapped outside the heavy metal repairing functional layer;
the high-permeability hard shell layer is composed of an inorganic bonding material, plastic clay and a permeable material containing micro-channels;
the heavy metal restoration functional layer is composed of a functional material and a natural bonding material, wherein the functional material is composed of an inorganic reducing agent, a natural organic carbon-releasing material, a carbonate mineral, biomass carbon and plastic clay.
Furthermore, in the permeable reactive barrier composite material provided by the invention, in the high-permeability hard shell layer, the inorganic binding material, the plastic clay and the permeable material containing the micro-channels are 22.3-32.9% in sequence according to the mass percentage: 50.1-66.9%: 10.7 to 20 percent; further, the inorganic binder is preferably at least one of portland cement and hydrated lime; the plastic clay is preferably at least one of attapulgite, kaolin and montmorillonite; the water permeable material containing the micro-channels is preferably diatomite.
Furthermore, in the permeable reactive wall composite material provided by the invention, the functional material is composed of an inorganic reducing agent, a natural organic carbon-releasing material, a carbonate mineral, biomass carbon and plastic clay, and the mass percentages of the functional material, the natural organic carbon-releasing material, the carbonate mineral, the biomass carbon and the plastic clay are 5-10% in sequence: 40-50%: 10-20%: 10%: 20 percent; further, the inorganic reducing agent is preferably at least one of secondary reduced iron powder, copper powder and aluminum powder; the natural organic carbon-releasing material is preferably at least one of wood chips (such as pine wood chips), fermented chicken manure and crop straws; the carbonate mineral is preferably at least one of ground calcium carbonate, sodium carbonate, calcium carbonate and magnesium carbonate, the biomass carbon is preferably at least one of poplar biochar, coconut shell biochar, bamboo charcoal and fruit core biochar, and the plastic clay is preferably at least one of attapulgite, kaolin and montmorillonite.
Furthermore, in the permeable reactive barrier composite material provided by the invention, the natural adhesive material is a sodium alginate solution with the mass percentage of 0.5-1%; the mass-to-volume ratio of the functional material to the natural adhesive material is preferably 1:10 (ml/g).
Further, in the permeable reactive barrier composite material provided by the invention, the particle size of the spherical structure is preferably 1-1.5 cm, and the thickness of the high-permeability hard outer shell layer is preferably 0.1-0.2 cm.
Secondly, the application also provides a method for preparing the permeable reactive barrier composite material, which comprises the following steps:
1) respectively sieving an inorganic bonding material, plastic clay, a permeable material containing micro-channels, an inorganic reducing agent, carbonate minerals, biomass carbon and the plastic clay by a sieve of 80 meshes for later use;
sieving natural organic carbon-releasing material with 20 mesh sieve;
preparing 0.5-1% sodium alginate solution for later use;
2) sequentially mixing the inorganic reducing agent obtained in the step 1), the natural organic carbon-releasing material, the carbonate mineral, the biomass carbon and the plastic clay according to the mass percentage of 5-10%: 40-50%: 10-20%: 10%: mixing 20% of the above materials, and making into functional powder;
3) mixing the sodium alginate solution (volume) and the functional powder (mass) prepared in the step 2) in a container according to the volume-mass ratio of 1:10 (ml/g), and uniformly stirring to preliminarily form small balls with loose structures;
4) pouring the pellets prepared in the step 3) into a sugar coating machine, rolling the pellets at a rotating speed of 30-40 r/min, and spraying a sodium alginate solution to form pellets with compact structures, wherein the pellets are used as core pellets for further preparing a heavy metal repairing functional layer;
5) pouring the small kernel balls prepared in the step 4) into a sugar coating machine, rolling the small kernels at the rotating speed of 30-40 r/min, adding the functional powder in the step 2), and spraying a sodium alginate solution to enable the small kernel balls to grow into primary heavy metal repairing functional layer balls with the grain size of 0.6-1.1 cm;
6) sieving the primary heavy metal restoration function layer pellets prepared in the step 5), and selecting pellets with the particle size not smaller than (i.e. larger than or equal to) 0.6 cm as screened heavy metal restoration function layer pellets for later use; repeating step 5) on pellets with the particle size of less than 0.6 cm;
7) sequentially mixing an inorganic binding material, plastic clay and a permeable material containing micro-channels according to the mass percentage of 22.3-32.9%: 50.1-66.9%: mixing 10.7-20% to obtain powder.
8) Putting the small balls with the heavy metal repairing functional layer screened in the step 6) into a sugar coating machine, adding the shell powder prepared in the step 7), rolling at a rotating speed of 30-40 r/min, and spraying tap water to form small balls;
9) naturally air-drying the pellets prepared in the step 8) to obtain a permeable reactive barrier composite material (PRB material); the material is in a spherical structure with the particle size of 1-1.5 cm, and comprises a heavy metal repairing functional layer and a high-permeability hard outer shell layer wrapped outside the heavy metal repairing functional layer, wherein the thickness of the high-permeability hard outer shell layer is 0.1-0.2 cm.
The application also provides application of the permeable reactive barrier composite material prepared by the method in repairing underground water polluted by heavy metal. Excavating a ditch in the flowing direction downstream of underground water polluted by heavy metal, and then uniformly mixing permeable reactive barrier materials and sand according to the mass ratio of 1:1 and piling the mixture into the ditch to form a permeable reactive barrier; the top end of the permeable reactive wall material is flush with the water level of the underground water, and finally the excavated soil is backfilled to the ditch, so that the polluted underground water is repaired. The heavy metals include Cd, As and Pb.
Compared with the existing permeable reactive barrier, the permeable reactive barrier composite material for repairing heavy metal pollution of underground water prepared by the application has the following advantages:
1) in the prior art, underground water pollutants are usually removed by only utilizing one or two principles, the permeable reactive barrier composite material prepared by the method removes heavy metals (Cd, As and Pb) in underground water under the comprehensive action of precipitation, complexation, adsorption, reduction and microorganism enrichment in an anaerobic environment, has the advantages of high removal efficiency, stability and wide application range, and has the removal rate of the heavy metals (Cd, As and Pb) of more than 99 percent after 91 days of stable operation;
2) the composite material has low preparation cost which is 1500-2000 yuan/t (other PRB materials are more than 5000 yuan/t according to market price);
3) the carbon source used by the permeable reactive barrier composite material is the combination of the biochar and the sawdust, is stable in carbon source release (used for complexing pollutants and providing nutrition for microbial growth) and easy to obtain, and can be still stabilized to be more than 35 mg/L after 91 days;
4) the reduced iron powder, the biochar, the attapulgite and the carbonate minerals in the permeable reactive wall composite material prepared by the method can maintain alkaline pH for a long time, and the pH can be stabilized to be more than 10 after 91 days, so that heavy metal precipitation is facilitated;
5) permeable reactive barrier combined material (PRB) that this application was prepared is the pellet shape, restores functional layer and outside high permeability hard outer shell including heavy metal, and the hardness of material has been guaranteed again to outer shell when guaranteeing that the water permeability is strong, makes it difficult broken and difficult jam underground water course underground.
Drawings
FIG. 1 is a graph showing the trend of pH of effluent over time in example 1.
FIG. 2 is a graph showing the trend of the total organic carbon concentration (TOC) of effluent water with time in example 1.
FIG. 3 is a schematic diagram showing the change trend of Cd concentration in effluent with time in example 1.
FIG. 4 is a graph showing the trend of pH of effluent over time in example 2.
FIG. 5 is a graph showing the trend of the total organic carbon concentration (TOC) of effluent water with time in example 2.
FIG. 6 is a schematic diagram showing the change trend of Cd concentration in effluent with time in example 2.
FIG. 7 is a graph showing the trend of pH of effluent over time in example 3.
FIG. 8 is a graph showing the trend of the Pb concentration of the effluent over time in example 3.
FIG. 9 is a graph showing the trend of the Pb concentration of the effluent over time in example 4.
FIG. 10 is a graph showing the time-dependent trend of As concentration in effluent in examples 5 and 6.
FIG. 11 is a schematic diagram showing the change trend of the pH value of effluent with time in examples 5 and 6.
FIG. 12 is a schematic diagram of an experimental apparatus, a composite material structure diagram and a pollutant removal mechanism for heavy metal contaminated groundwater remediation.
And fig. 13 is a photograph of the prepared heavy metal repairing functional layer bead.
Fig. 14 is a photograph of a finished product with PRB material.
Detailed Description
The invention is further described with reference to specific examples. Materials/equipment sources involved in the examples: the secondary reduced iron powder, poplar biochar, ground limestone and sodium alginate are purchased from Nanjing Ningqing glass instruments Limited; portland cement (425) was purchased from Endoconcha Sepiae Cement, Inc.; fermented chicken manure was purchased from Shenyang Hao Yuan environmental services Co., Ltd; in the experiment, the standard solution of Cd, Pb and As (1000 mg/L) purchased from Beijing Zhongke quality inspection biotechnology limited is used for preparing polluted underground water; sugar coating machines (YB-400) were purchased from Guangzhou Yangying medical devices, Inc. The determination of Cd, Pb and As in the effluent was carried out by ICP-MS. TOC was analyzed using a TOC analyzer (Mettler-Tollido 5000 TOCi).
Example 1
Preparing a composite material for repairing heavy metal polluted underground water, wherein the composite material comprises a heavy metal repairing functional layer and a high-permeability hard outer shell layer wrapped on the outer side of the heavy metal repairing functional layer; the high-permeability hard shell layer comprises the following components in percentage by mass: 10.7 percent of diatomite, 59.1 percent of attapulgite and 30.2 percent of Portland cement.
The functional material of the heavy metal restoration functional layer comprises the following components in percentage by mass: 10% of secondary reduced iron powder, 25% of pine and cypress sawdust, 25% of fermented chicken manure, 10% of ground calcium carbonate, 10% of poplar charcoal and 20% of attapulgite. The adhesive of the heavy metal restoration functional layer is sodium alginate solution with the concentration of 0.5 percent. The particle size of the raw materials for preparing the composite material is larger than 80 meshes except for the pine and cypress sawdust and the fermented chicken manure which are 20 meshes.
The preparation method of the composite material for repairing the heavy metal polluted underground water comprises the following steps:
1) diatomite, attapulgite, portland cement, secondary reduced iron powder, ground limestone, poplar biochar and attapulgite which are sieved by a sieve of 80 meshes are reserved, pine and cypress sawdust and fermented chicken manure which are sieved by a sieve of 20 meshes are reserved, and sodium alginate solution is reserved.
2) The secondary reduced iron powder, pine and cypress sawdust, fermented chicken manure, heavy calcium carbonate, poplar biochar and attapulgite in the step 1) are mixed according to the mass percentage of 10 percent: 25%: 25%: 10%: 10%: mixing 20% of the above materials, and making into functional powder.
3) Taking out a part of the functional powder in the step 2) according to the volume of the sodium alginate solution: the powder is mixed in a certain container according to the mass ratio of 1:10 (ml: g), and is uniformly stirred to form a small ball shape (about 1-2 mm) with a loose structure.
4) Pouring the pellets prepared in the step 3) into a sugar coating machine, rolling the pellets at a rotating speed of 30 r/min, and spraying a sodium alginate solution to form compact-structure pellets which are used as core pellets for further preparing a heavy metal restoration function layer.
5) Pouring the small core balls prepared in the step 4) into a sugar coating machine, rolling the small balls at the rotating speed of 30 r/min, adding the functional powder prepared in the step 2), and spraying a sodium alginate solution to enable the small core balls to grow into primary heavy metal restoration functional layer small balls with the grain size of 0.6-1.1 cm.
6) Sieving the primary heavy metal restoration function layer pellets prepared in the step 5), and selecting pellets with the particle size of more than or equal to 0.6 cm as sieved heavy metal restoration function layer pellets for later use, wherein the photo of the pellets is shown in figure 13; and the small balls with the grain diameter smaller than 0.6 cm are used as the inner cores for manufacturing the small balls with the heavy metal repairing function layer next time.
7) The Portland cement, the attapulgite and the diatomite are mixed according to the mass percentage of 22.3%: 66.9%: 10.7 percent of the raw materials are uniformly mixed to prepare the shell powder for standby.
8) Putting the small balls with the heavy metal repairing functional layer screened in the step 6) into a sugar coating machine, adding the shell powder prepared in the step 7), rolling at the rotating speed of 30 r/min, spraying tap water to form small balls with the particle size of 1-1.5 cm, and naturally drying to obtain the permeable reactive wall composite material (PRB material), wherein the photo of the permeable reactive wall composite material is shown in figure 14, and the thickness of the high-permeability hard shell layer obtained in the embodiment is about 0.1-0.2 cm.
The permeable reactive barrier composite material (referred to as composite material in fig. 12) prepared in this example and quartz sand were filled in a 50 cm long settling tube with a diameter of 5 cm according to a mass ratio of 1:1 (see fig. 12 for the apparatus and principle).
A water sample simulating Cd contamination of groundwater (Cd initial concentration 500 μ g/L, pH = 4) was supplied to the precipitation tube by a peristaltic pump at a flow rate of 19.6 μ L/min with a hydraulic retention time of about 31 days.
The pH value, the TOC concentration and the Cd concentration of effluent are respectively detected, the detection results are sequentially shown in figure 1, figure 2 and figure 3, the effluent concentration of heavy metal Cd after 91 days of operation is 0.05 mu g/L, the removal rate is more than 99%, the pH value is 10.05, and the Total Organic Carbon (TOC) is 38.2 mg/L.
Example 2
In the permeable reactive barrier composite material prepared by the embodiment, the high-permeability hard outer shell layer consists of the following components in percentage by mass: 15% of diatomite, 55% of attapulgite and 30% of portland cement; the functional material of the heavy metal restoration functional layer comprises the following components in percentage by mass: 5% of secondary reduced iron powder, 50% of pine and cypress sawdust, 15% of heavy calcium carbonate, 10% of poplar charcoal and 20% of attapulgite. The adhesive of the heavy metal restoration functional layer is 0.5 percent of sodium alginate solution. The particle sizes of other raw materials are larger than 80 meshes except for the raw materials for preparing the composite material, namely the pine and cypress sawdust and the fermented chicken manure are 20 meshes.
The steps of the preparation method of the composite material are the same as those of the embodiment 1, the difference is that the rotating speed of the sugar coating machine is 40 r/min, and the thickness of the high-permeability hard outer shell prepared by the embodiment is about 0.1-0.15 cm.
The composite functional material prepared in the example and quartz sand are filled in a precipitation tube with the length of 50 cm and the diameter of 5 cm according to the mass ratio of 1:1 (same as example 1). The water sample simulating Cd pollution of the underground water is supplied to a precipitation tube by a peristaltic pump at the flow rate of 19.6 mu L/min, the hydraulic retention time is about 31 days, the initial concentration of Cd is 500 mu g/L, and the pH = 4.
The pH, the TOC concentration and the Cd concentration of the effluent are respectively detected, the detection results are shown in figures 4, 5 and 6, the effluent concentration of heavy metal Cd after 91 days of operation is 0.14 mug/L, the removal rate is more than 99%, the pH value is 10.33, and the Total Organic Carbon (TOC) is 35.8 mg/L. The former is superior to the latter in the removal effect in example 2 as compared with example 1.
Example 3
In the permeable reactive barrier composite material prepared by the embodiment, the high-permeability hard outer shell layer consists of the following components in percentage by mass: 17% of diatomite, 50.1% of attapulgite and 32.9% of portland cement. The functional material of the heavy metal restoration functional layer comprises the following components in percentage by mass: 7% of secondary reduced iron powder, 50% of fermented chicken manure, 13% of ground calcium carbonate, 10% of poplar biochar and 20% of attapulgite. The adhesive of the heavy metal restoration functional layer is 0.5 percent of sodium alginate solution. The particle size of the raw materials for preparing the composite material is larger than 80 meshes except for 20 meshes of fermented chicken manure.
The preparation steps of the composite material of this example are the same as example 1, except that the rotation speed of the sugar coating machine is 35 r/min, the thickness of the prepared high-permeability hard outer shell is about 0.1-0.15 cm, and the poplar biochar is prepared by using 10% KOH according to the ratio of 1 (poplar biochar mass, g): 10 (volume of KOH, ml) for 24 hours, and then drying the nylon filter cloth with 200 meshes at 85 ℃ after vacuum filtration and sieving the nylon filter cloth with 80 meshes.
The composite functional material prepared in the example and quartz sand are filled in a precipitation tube with the length of 50 cm and the diameter of 5 cm according to the mass ratio of 1:1 (same as example 1). A water sample simulating Pb contamination of groundwater was supplied to the settling tube by a peristaltic pump at a flow rate of 19.6 μ L/min for a hydraulic retention time of about 31 days, with an initial concentration of Pb of 500 μ g/L and pH = 4.
The pH and Pb concentration of the water were measured, and the measurement results are shown in fig. 7 and 8: after 91 days of operation, the effluent concentration of heavy metal Pb is 0.09 mu g/L, the removal rate is more than 99 percent, and the pH of the effluent is 9.80.
Example 4
In the permeable reactive barrier composite material prepared by the embodiment, the high-permeability hard outer shell layer consists of the following components in percentage by mass: 20% of diatomite, 52% of attapulgite and 28% of portland cement. The functional material of the heavy metal restoration functional layer comprises the following components in percentage by mass: 10% of secondary reduced iron powder, 40% of fermented chicken manure, 20% of ground calcium carbonate, 10% of poplar biochar and 20% of attapulgite. The adhesive of the heavy metal restoration functional layer is 1% sodium alginate solution. The particle size of the raw materials for preparing the composite material is larger than 80 meshes except for 20 meshes of fermented chicken manure.
The preparation procedure of the composite material of this example is the same as that of example 1, except that the rotation speed of the sugar coating machine is 35 r/min, the thickness of the high-permeability hard outer shell is about 0.1-0.15 cm, and the ratio of the attapulgite to the KOH is 10% according to 1 (mass of attapulgite, g): 15 (volume of KOH, ml) for 24 hours, vacuum filtering with 200 mesh nylon filter cloth, drying at 85 ℃ and sieving with 80 mesh sieve.
The composite functional material prepared in the example and quartz sand are filled in a precipitation tube with the length of 50 cm and the diameter of 5 cm according to the mass ratio of 1:1 (same as example 1). A water sample simulating Pb contamination of groundwater was supplied to the settling tube by a peristaltic pump at a flow rate of 19.6 μ L/min for a hydraulic retention time of about 31 days, with an initial concentration of Pb of 500 μ g/L and pH = 4.
The Pb concentration of the water was detected, and the detection result is shown in fig. 9: after 91 days of operation, the effluent concentration of heavy metal Pb is 0.05 mu g/L, and the removal rate is more than 99 percent.
Example 5
In the permeable reactive barrier composite material prepared by the embodiment, the high-permeability hard outer shell layer consists of the following components in percentage by mass: 12.1 percent of diatomite, 62.9 percent of attapulgite and 25 percent of Portland cement. The functional material of the heavy metal restoration functional layer comprises the following components in percentage by mass: 10% of secondary reduced iron powder, 40% of pine and cypress sawdust, 20% of heavy calcium carbonate, 10% of poplar charcoal and 20% of attapulgite. The adhesive of the heavy metal restoration functional layer is 1% sodium alginate solution. The particle sizes of the raw materials for preparing the composite material are all larger than 80 meshes except for the pine and cypress sawdust of 20 meshes.
The preparation steps of the composite material of the embodiment are the same as those of the embodiment 1, and the difference is that the rotating speed of the sugar coating machine is 35 r/min, and the thickness of the high-permeability hard outer shell is 0.1-0.15 cm. The attapulgite was treated with 6 mol/L hydrochloric acid in accordance with the following formula (1) (attapulgite mass, g): 15 (volume of hydrochloric acid, ml) for 24 hours, vacuum filtering with 200 mesh nylon filter cloth, drying at 85 ℃, and sieving with 80 mesh sieve.
The composite functional material prepared in the example and quartz sand are filled in a precipitation tube with the length of 50 cm and the diameter of 5 cm according to the mass ratio of 1:1 (same as example 1). A water sample simulating As contamination of groundwater was supplied to the settling tube by a peristaltic pump at a flow rate of 19.6 μ L/min for a hydraulic retention time of about 31 days, with an initial concentration of As of 500 μ g/L and pH = 4.
The Pb concentration and pH value of the water were detected, and the detection results are shown in fig. 10 and 11: after 91 days of operation, the effluent concentration of heavy metal As is 4.09 mu g/L, the removal rate is more than 99 percent, and the pH of the effluent is 7.42.
Example 6
In the permeable reactive barrier composite material prepared by the embodiment, the high-permeability hard outer shell layer consists of the following components in percentage by mass: 10.7 percent of diatomite, 66.9 percent of attapulgite and 22.3 percent of Portland cement. The heavy metal restoration functional layer comprises the following components in percentage by mass: 10% of secondary reduced iron powder, 20% of pine and cypress sawdust, 30% of fermented chicken manure, 10% of ground calcium carbonate, 10% of poplar charcoal and 20% of attapulgite. The adhesive of the heavy metal restoration functional layer is 0.7 percent of sodium alginate solution. The particle sizes of the raw materials for preparing the composite material are all larger than 80 meshes except for the pine and cypress sawdust of 20 meshes.
The preparation steps of the composite material of the embodiment are the same as those of the embodiment 1, and the difference is that the rotating speed of the sugar coating machine is 35 r/min, and the thickness of the high-permeability hard outer shell is about 0.1-0.15 cm. The attapulgite is prepared by mixing 3 mol/L hydrochloric acid according to the mass ratio of 1 (attapulgite mass, g): 15 (volume of hydrochloric acid, ml) for 24 hours, vacuum filtering with 200 mesh nylon filter cloth, drying at 85 ℃, and sieving with 80 mesh sieve.
The composite functional material prepared in the embodiment and quartz sand are filled in a precipitation tube with the length of 50 cm and the diameter of 5 cm according to the mass ratio of 1: 1. A water sample simulating As contamination of groundwater was supplied to the settling tube by a peristaltic pump at a flow rate of 19.6 μ L/min for a hydraulic retention time of about 31 days, with an initial concentration of As of 500 μ g/L and pH = 4.
The Pb concentration and the pH value of the water are respectively detected, and the detection results are shown in fig. 10 and fig. 11: after 91 days of operation, the effluent concentration of heavy metal As is 3.72 mu g/L, the removal rate is more than 99 percent, and the pH of the effluent is 7.44.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several modifications can be made without departing from the inventive concept, and these modifications belong to the protective scope of the invention.
Claims (9)
1. The permeable reactive barrier composite material is characterized in that the composite material is a spherical structure consisting of a heavy metal restoration functional layer and a high-permeability hard outer shell layer wrapped outside the heavy metal restoration functional layer;
the high-permeability hard shell layer is composed of an inorganic bonding material, plastic clay and a permeable material containing micro-channels;
the heavy metal restoration functional layer consists of a functional material and a natural adhesive material; the functional material consists of an inorganic reducing agent, a natural organic carbon-releasing material, carbonate minerals, biomass carbon and plastic clay;
the inorganic binding material comprises at least one of Portland cement and hydrated lime; the plastic clay comprises at least one of attapulgite, kaolin and montmorillonite; the permeable material containing the micro-channels is diatomite;
in the functional material, the inorganic reducing agent comprises at least one of secondary reduced iron powder, copper powder and aluminum powder; the natural organic carbon-releasing material comprises at least one of wood chips, fermented chicken manure and crop straws; the carbonate mineral comprises at least one of ground calcium carbonate, sodium carbonate, calcium carbonate and magnesium carbonate;
the natural adhesive material is sodium alginate solution.
2. The permeable reactive wall composite according to claim 1, wherein the high permeability hard shell layer comprises 22.3-32.9% of inorganic binder material, plastic clay, and microporous permeable material in sequence by mass percent: 50.1-66.9%: 10.7 to 20 percent.
3. The permeable reactive barrier composite material according to claim 1, wherein the functional material comprises 5-10% of inorganic reducing agent, natural organic carbon-releasing material, carbonate mineral, biomass carbon and plastic clay in sequence by mass percent: 40-50%: 10-20%: 10%: 20 percent.
4. The permeable reactive barrier composite material of claim 1, wherein the mass percent of the sodium alginate solution is 0.5-1% of the sodium alginate solution, and the mass ratio of the functional material to the natural adhesive material is 1: 10.
5. The permeable reactive wall composite of claim 1, wherein the spherical structures have a particle size of 1-1.5 cm.
6. The permeable reactive wall composite of claim 5, wherein the high permeability hard shell layer has a thickness of 0.1-0.2 cm.
7. The preparation method of the permeable reactive barrier composite material according to any one of claims 1 to 6, which comprises the following steps:
1) mixing an inorganic reducing agent, a natural organic carbon-releasing material, carbonate minerals, biomass carbon and plastic clay to obtain functional powder for later use;
2) mixing the functional powder with sodium alginate solution, stirring, pouring the obtained small balls into a sugar coating machine, rolling, and spraying sodium alginate solution to obtain small core balls;
3) pouring the small core balls into a sugar coating machine for rolling, adding functional powder, and spraying sodium alginate solution to obtain primary heavy metal restoration functional layer small balls;
4) selecting primary heavy metal restoration functional layer balls with the particle size not less than 0.6 cm as screening heavy metal restoration functional layer balls for later use;
5) mixing inorganic bonding material, plastic clay and permeable material containing micro-channels uniformly to prepare shell powder for later use;
6) and (3) placing the screened heavy metal restoration functional layer pellets into a sugar coating machine, adding shell powder, rolling at the rotating speed of 30-40 r/min, spraying tap water to form pellets, and naturally drying to obtain the permeable reactive wall composite material.
8. The method for preparing the permeable reactive barrier composite material according to claim 7, wherein the rotation speed of the sugar coating machine in the steps 2), 3) and 6) is 30-40 r/min.
9. Use of the permeable reactive wall composite according to any one of claims 1 to 6 for remediation of groundwater contaminated with heavy metals.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115677047A (en) * | 2022-10-31 | 2023-02-03 | 江苏省环境科学研究院 | Coupling restoration method integrating emergency disposal, long-term reduction and intelligent monitoring of underground water pollution of retired chemical land blocks |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090090677A1 (en) * | 2007-10-09 | 2009-04-09 | National Cheng Kung University | Method of treating organic compounds in groundwater |
CN101805153A (en) * | 2009-02-12 | 2010-08-18 | 中国环境科学研究院 | Permeable reactive barrier dielectric material used for remedying underground water pollution |
CN103739089A (en) * | 2014-01-28 | 2014-04-23 | 南京大学 | Composite functional material for performing biochemical combined remediation on polluted underwater and preparation method for composite functional material |
CN104150613A (en) * | 2014-09-01 | 2014-11-19 | 南京大学 | Permeable reactive filler for removing nitrate organisms from underground water, system and filling method thereof |
CN106623401A (en) * | 2016-12-05 | 2017-05-10 | 上海绿强新材料有限公司 | Method for repairing heavy metal polluted soil based on permeation absorption wall |
CN107235561A (en) * | 2017-08-04 | 2017-10-10 | 南京大学 | It is a kind of for permeable reaction wall composite of PAHs in groundwater pollution amelioration and preparation method thereof |
CN107265665A (en) * | 2017-08-04 | 2017-10-20 | 南京大学 | It is a kind of for infiltration type reaction wall composite of the chloride pollution amelioration containing nitro-aromatic of underground water and preparation method thereof |
CN112960765A (en) * | 2021-02-07 | 2021-06-15 | 生态环境部南京环境科学研究所 | Biological permeable reactive barrier slow-release filler capable of removing trichloroethylene in underground water in situ and having core-shell structure and preparation method thereof |
-
2021
- 2021-10-29 CN CN202111272984.5A patent/CN114044571B/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090090677A1 (en) * | 2007-10-09 | 2009-04-09 | National Cheng Kung University | Method of treating organic compounds in groundwater |
CN101805153A (en) * | 2009-02-12 | 2010-08-18 | 中国环境科学研究院 | Permeable reactive barrier dielectric material used for remedying underground water pollution |
CN103739089A (en) * | 2014-01-28 | 2014-04-23 | 南京大学 | Composite functional material for performing biochemical combined remediation on polluted underwater and preparation method for composite functional material |
CN104150613A (en) * | 2014-09-01 | 2014-11-19 | 南京大学 | Permeable reactive filler for removing nitrate organisms from underground water, system and filling method thereof |
CN106623401A (en) * | 2016-12-05 | 2017-05-10 | 上海绿强新材料有限公司 | Method for repairing heavy metal polluted soil based on permeation absorption wall |
CN107235561A (en) * | 2017-08-04 | 2017-10-10 | 南京大学 | It is a kind of for permeable reaction wall composite of PAHs in groundwater pollution amelioration and preparation method thereof |
CN107265665A (en) * | 2017-08-04 | 2017-10-20 | 南京大学 | It is a kind of for infiltration type reaction wall composite of the chloride pollution amelioration containing nitro-aromatic of underground water and preparation method thereof |
CN112960765A (en) * | 2021-02-07 | 2021-06-15 | 生态环境部南京环境科学研究所 | Biological permeable reactive barrier slow-release filler capable of removing trichloroethylene in underground water in situ and having core-shell structure and preparation method thereof |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115677047A (en) * | 2022-10-31 | 2023-02-03 | 江苏省环境科学研究院 | Coupling restoration method integrating emergency disposal, long-term reduction and intelligent monitoring of underground water pollution of retired chemical land blocks |
CN115677047B (en) * | 2022-10-31 | 2023-07-18 | 江苏省环境科学研究院 | Coupling repair method integrating retired chemical engineering land block groundwater pollution emergency treatment, long-term reduction and intelligent monitoring |
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