CN112624541A - Ion adsorption coupling microorganism mineralized heavy metal repairing material and preparation method and application thereof - Google Patents
Ion adsorption coupling microorganism mineralized heavy metal repairing material and preparation method and application thereof Download PDFInfo
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- CN112624541A CN112624541A CN202110148108.5A CN202110148108A CN112624541A CN 112624541 A CN112624541 A CN 112624541A CN 202110148108 A CN202110148108 A CN 202110148108A CN 112624541 A CN112624541 A CN 112624541A
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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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
- C02F2101/20—Heavy metals or heavy metal compounds
Abstract
The invention discloses an ion adsorption coupling microorganism mineralized heavy metal restoration material, a preparation method and application thereof, belonging to the crossed scientific technology in the fields of environmental science, materials science and microbiology, and comprising the following steps: uniformly mixing silt, clay, fly ash, a binder, a pore-forming agent and ferroferric oxide according to a certain proportion, grinding the mixture into powder, adding water and stirring the mixture to form slurry, preparing spherical particles with the particle size of 1-10 mm by using a granulator, drying the spherical particles in an oven, and preheating and roasting the dried spherical particles in a muffle furnace to prepare a porous carrier; and uniformly mixing the microbial powder and the porous carrier, and fully mixing under a negative pressure condition to obtain the heavy metal repairing material with the carrier fixing the microorganisms. The method adopts the waste river bottom sludge to prepare the porous carrier to fix the microorganisms, has dual functions of adsorption and mineralization, has high speed of repairing heavy metal pollution, good effect and high long-term stability, and greatly reduces the cost of environmental management by taking the waste as the raw material.
Description
Technical Field
The invention belongs to the crossed scientific technology in the fields of environmental science, materials science and microbiology, and relates to a heavy metal repairing material mineralized by coupling ion adsorption with microorganisms, and a preparation method and application thereof.
Background
Along with the continuous acceleration of the urbanization process, the urban scale is gradually enlarged, the land resources are more and more scarce, and the traditional extensive treatment method of dredging sludge not only occupies a large amount of land resources, but also pollutes underground water and atmosphere and causes secondary pollution. These treatment methods cannot meet the needs of urban development, and there is an urgent need to find a treatment method for recycling and harmlessness. The recycling treatment method of the slush mud mainly comprises dehydration treatment, solidification stabilization treatment and heat treatment; after dehydration treatment, the volume of the dredged sludge is reduced, and the subsequent treatment is easy; the solidification stabilization treatment is to enhance the bonding strength among soil particles by doping solidification materials such as cement and the like, has a physical and chemical stabilization effect on pollution components in the sludge, and is suitable for large-scale dredging sludge treatment; the heat treatment is to produce high value-added products such as cement, sintered bricks, ceramsite and the like by a high-temperature melting activation method. Although the method realizes resource utilization of the sludge, the problems of high cost, complex process, secondary pollution and the like generally exist, and a new method and a new technology for safely and efficiently utilizing the sludge are urgently needed to be developed.
The heavy metal pollution problem is another focus of social attention, and currently, a specific carrier is adopted to adsorb and fix free heavy metal ions in water pollution treatment, so that a good effect is achieved. If the sludge is adopted to prepare the porous ceramsite as the carrier, the problem of safe and efficient utilization of the sludge can be solved, the porous ceramsite can also be used for repairing heavy metal pollution, and the porous ceramsite has important research value and practical significance.
Disclosure of Invention
The technical problem is as follows: aiming at the defects in the prior art, the invention provides an ion adsorption coupling microorganism mineralized heavy metal repairing material, and a preparation method and application thereof.
The technical scheme is as follows: the technical scheme adopted by the invention is as follows: an ion adsorption coupling microorganism mineralized heavy metal repairing material and a preparation method and application thereof comprise the following steps:
(1) uniformly mixing silt, clay, fly ash, a binder, a pore-forming agent and ferroferric oxide, grinding the mixture into powder, and adding water to mix the powder into slurry;
(2) preparing the synthetic slurry in the step (1) into spherical particles with the particle size of 1-10 mm by a granulator;
(3) placing the spherical particles in a drying oven for drying, and placing the dried spherical particles in a muffle furnace for preheating and roasting to prepare a porous carrier;
(4) uniformly mixing the microbial powder with a porous carrier, fully mixing under a negative pressure condition for 30-50 minutes to obtain a heavy metal repairing material with the carrier fixing microorganisms;
(5) and (3) placing the heavy metal repairing material with the microorganism fixed on the carrier into the sewage containing the heavy metal ions, slowly stirring, and monitoring the concentration of the heavy metal ions in the sewage.
Preferably, the raw materials are as follows according to the weight portion: 30-70 parts of sludge, 15-25 parts of clay, 10-20 parts of fly ash, 2-5 parts of a binder, 1-5 parts of a pore-forming agent, 1-5 parts of ferroferric oxide and 1-10 parts of microbial powder.
Preferably, the sludge is river bottom sludge which is dried and dehydrated to constant weight.
Preferably, the pore-forming agent is one or a combination of more of sodium bicarbonate, ammonium bicarbonate and sodium carbonate.
Preferably, the microbial powder is one or a combination of more of bacillus mucilaginosus, bacillus pasteurianus, photosynthetic bacteria and bacillus lysinate.
Preferably, in the step (3), the drying temperature is 100 +/-10 ℃, and the drying time is 12-24 hours; the method is characterized in that the roasting temperature is 1050 +/-50 ℃, and the roasting time is 5-10 minutes.
Preferably, the weight ratio of the microbial powder to the porous carrier in the step (4) is (1-10): 100.
the heavy metal repairing material mineralized by the ion adsorption coupling microorganisms is mixed with sewage in a weight ratio of (1-10): 100.
An ion adsorption coupling microorganism mineralized heavy metal restoration material is prepared by the method.
Has the advantages that: compared with the prior art, the invention has the following advantages:
1. the method has the advantages that the waste river bottom sludge is adopted to prepare the porous carrier, so that the problems of land occupation and environment pollution of the sludge are solved, a safe and economic method is provided for sludge utilization, raw materials can be provided for heavy metal pollution remediation, the cost of environment treatment is greatly reduced, and the economic and social benefits are remarkable;
2. the compact pore channel structure of the porous carrier prepared by the river sludge provides a natural space for fixing microorganisms, and creates a precondition for the preparation of a multifunctional repairing material;
3. the repairing material prepared by the microorganism immobilized by the porous carrier can quickly and effectively enrich free heavy metal ions, and simultaneously, the free metal ions are converted into stable minerals through microbial mineralization, so that the repairing material has dual functions of adsorption and mineralization, and is high in repairing speed, good in effect and high in long-term stability.
Drawings
FIG. 1 is a graph showing the relationship between the concentration of copper ions in wastewater and the remediation time in the first example;
FIG. 2 is a graph showing the relationship between the concentration of copper ions in wastewater and the remediation time in example two.
Detailed Description
The invention provides an ion adsorption coupling microorganism mineralized heavy metal repairing material and a preparation method and application thereof, wherein the method comprises the following steps:
example one:
(1) preparing raw materials for preparing the repair material according to the following parts by weight: 30 parts of river bottom sludge dehydrated to constant weight by drying, 25 parts of clay, 23 parts of fly ash, 2 parts of sodium cellulose as a binder, 5 parts of sodium bicarbonate as a pore-forming agent and 5 parts of ferroferric oxide;
(2) uniformly mixing silt, clay, fly ash, a binder sodium cellulose, a pore-forming agent sodium bicarbonate and ferroferric oxide, grinding the mixture into powder, adding water and stirring the mixture to synthesize slurry, preparing spherical particles with the particle size of 1-10 mm by a granulator, drying the spherical particles in an oven at the drying temperature of 110 ℃ for 24 hours, preheating and roasting the dried particles in a muffle furnace at the roasting temperature of 1050 ℃ for 10 minutes, and naturally cooling the particles to normal temperature to obtain a porous carrier;
(3) uniformly mixing 10 parts of photosynthetic bacteria powder and 100 parts of porous carrier, and fully mixing under the condition of negative pressure for 50 minutes to obtain the heavy metal repairing material of carrier immobilized microorganism;
(4) placing a heavy metal repairing material with a carrier fixing microorganism in sewage containing heavy metal ions, wherein the heavy metal sewage contains 19.80 mg/L copper, the weight ratio of the repairing material to the sewage is 5:100, slowly stirring the materials, keeping the environment temperature at 35 ℃, taking a magnetic carrier as a center to enrich free heavy metal ions, converting the free heavy metal ions into stable minerals through microbial mineralization, and monitoring the concentration change trend of the heavy metal ions in the sewage.
Example two:
(1) preparing raw materials for preparing the repair material according to the following parts by weight: 50 parts of river bottom sludge, 15 parts of clay, 10 parts of fly ash, 5 parts of binder, 5 parts of sodium bicarbonate, 5 parts of ammonium bicarbonate, 5 parts of pore-forming agent and 5 parts of ferroferric oxide, wherein the river bottom sludge is dried and dehydrated to constant weight;
(2) uniformly mixing silt, clay, fly ash, a binder, a pore-forming agent and ferroferric oxide, grinding the mixture into powder, adding water, mixing the mixture into slurry, preparing spherical particles with the particle size of 1-10 mm by using a granulator, drying the spherical particles in a drying oven at the drying temperature of 110 ℃ for 24 hours, placing the dried spherical particles in a muffle furnace for preheating and roasting at the roasting temperature of 1050 ℃ for 10 minutes, and naturally cooling the mixture to normal temperature to obtain a porous carrier;
(3) mixing bacillus mucilaginosus, bacillus pasteurianus, photosynthetic bacteria, bacillus lysinate and the like in a mass ratio to obtain 10 parts of microbial powder, uniformly mixing the microbial powder with 100 parts of porous carrier, fully mixing the mixture under a negative pressure condition for 50 minutes to obtain a heavy metal repairing material of carrier immobilized microorganisms;
(4) placing a heavy metal repairing material with a carrier fixing microorganism in sewage containing heavy metal ions, wherein the heavy metal sewage contains 19.80 mg/L copper, the weight ratio of the repairing material to the sewage is 10:100, slowly stirring the materials, keeping the environment temperature at 35 ℃, taking a magnetic carrier as a center to enrich free heavy metal ions, converting the free heavy metal ions into stable minerals through microbial mineralization, and monitoring the concentration change trend of the heavy metal ions in the sewage.
As can be seen from the relation data of the concentration of copper ions in the sewage and the remediation time in the attached drawings 1 and 2, the material has a better effect on the remediation of the heavy metal sewage, and can remove the heavy metal pollutants in the sewage within 50 hours.
Claims (10)
1. A preparation method of a heavy metal repairing material mineralized by coupling ion adsorption and microorganisms is characterized by comprising the following steps:
(1) uniformly mixing silt, clay, fly ash, a binder, a pore-forming agent and ferroferric oxide, grinding the mixture into powder, and adding water to mix the powder into slurry;
(2) preparing the synthetic slurry in the step (1) into spherical particles with the particle size of 1-10 mm by a granulator;
(3) placing the spherical particles in a drying oven for drying, and placing the dried spherical particles in a muffle furnace for preheating and roasting to prepare a porous carrier;
(4) uniformly mixing the microbial powder with a porous carrier, fully mixing under a negative pressure condition for 30-50 minutes to obtain a heavy metal repairing material with the carrier fixing microorganisms;
(5) and (3) placing the heavy metal repairing material with the microorganism fixed on the carrier into the sewage containing the heavy metal ions, slowly stirring, and monitoring the concentration of the heavy metal ions in the sewage.
2. The preparation method of the ion adsorption coupling microorganism mineralized heavy metal restoration material according to claim 1, wherein the raw materials comprise, by weight: 30-70 parts of sludge, 15-25 parts of clay, 10-20 parts of fly ash, 2-5 parts of a binder, 1-5 parts of a pore-forming agent, 1-5 parts of ferroferric oxide and 1-10 parts of microbial powder.
3. The method for preparing the heavy metal restoration material mineralized by the ion adsorption coupling microorganisms according to claim 1, wherein the sludge is river bottom sludge dried and dehydrated to constant weight.
4. The method for preparing the heavy metal restoration material mineralized by the ion adsorption coupling microorganisms according to claim 1, wherein the binder is one or a combination of several of sodium cellulose, chitosan and gypsum.
5. The method for preparing the heavy metal restoration material mineralized by the ion adsorption coupling microorganisms according to claim 1, wherein the pore-forming agent is one or a combination of more of sodium bicarbonate, ammonium bicarbonate and sodium carbonate.
6. The method for preparing the heavy metal restoration material mineralized by the ion adsorption coupling microorganisms according to claim 1, wherein the microbial powder is one or a combination of more of bacillus mucilaginosus, bacillus pasteurianus, photosynthetic bacteria and bacillus lysinate.
7. The method for preparing the ion adsorption coupling microorganism mineralized heavy metal restoration material according to claim 1, wherein in the step (3), the drying temperature is 100 ± 10 ℃, and the drying time is 12-24 hours; the method is characterized in that the roasting temperature is 1050 +/-50 ℃, and the roasting time is 5-10 minutes.
8. The method for preparing the ion adsorption coupling microorganism mineralized heavy metal restoration material according to claim 1, wherein the weight ratio of the microbial powder to the porous carrier in the step (4) is (1-10): 100.
9. the application of the heavy metal repairing material mineralized by the ion adsorption coupling microorganisms is characterized in that the weight ratio of the heavy metal repairing material mineralized by the ion adsorption coupling microorganisms to sewage is (1-10): 100.
10. An ion adsorption coupled microbial mineralized heavy metal restoration material, which is prepared by the method of any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110148108.5A CN112624541A (en) | 2021-02-03 | 2021-02-03 | Ion adsorption coupling microorganism mineralized heavy metal repairing material and preparation method and application thereof |
| PCT/CN2021/130680 WO2022166297A1 (en) | 2021-02-03 | 2021-11-15 | Heavy metal repair material having ion adsorption coupled to microbial mineralization, preparation method therefor and application thereof |
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| CN202110148108.5A CN112624541A (en) | 2021-02-03 | 2021-02-03 | Ion adsorption coupling microorganism mineralized heavy metal repairing material and preparation method and application thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113209944A (en) * | 2021-05-21 | 2021-08-06 | 浙江华东建设工程有限公司 | Heavy metal passivator for immobilizing microorganisms on attapulgite-based carrier and preparation method thereof |
| CN113402211A (en) * | 2021-07-06 | 2021-09-17 | 中建安装集团有限公司 | Cement-based material with water purification function and preparation method and application thereof |
| CN114804360A (en) * | 2022-05-24 | 2022-07-29 | 湖南五方环境科技研究院有限公司 | Modified expanded perlite particles and preparation method and application thereof |
| WO2022166297A1 (en) * | 2021-02-03 | 2022-08-11 | 江苏科技大学 | Heavy metal repair material having ion adsorption coupled to microbial mineralization, preparation method therefor and application thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115466013B (en) * | 2022-09-24 | 2023-09-19 | 井冈山大学 | Get rid of and retrieve device of heavy metal in waste water |
| CN115536127A (en) * | 2022-09-27 | 2022-12-30 | 湖南普泰尔环境股份有限公司 | Ramie bone composite filler for biological filter and preparation method thereof |
Citations (3)
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| US6107067A (en) * | 1998-07-06 | 2000-08-22 | W.R. Grace & Co.-Conn. | Porous, non-macroporous, inorganic oxide carrier body for immobilizing microorganisms for bioremediation |
| CN107473398A (en) * | 2017-08-08 | 2017-12-15 | 航天凯天环保科技股份有限公司 | A kind of multi-functional denitrogenation dephosphorizing medicament and its preparation method and application |
| CN109012216A (en) * | 2018-08-23 | 2018-12-18 | 中冶华天工程技术有限公司 | New function ceramic membrane materials and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624541A (en) * | 2021-02-03 | 2021-04-09 | 江苏科技大学 | Ion adsorption coupling microorganism mineralized heavy metal repairing material and preparation method and application thereof |
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2021
- 2021-02-03 CN CN202110148108.5A patent/CN112624541A/en active Pending
- 2021-11-15 WO PCT/CN2021/130680 patent/WO2022166297A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6107067A (en) * | 1998-07-06 | 2000-08-22 | W.R. Grace & Co.-Conn. | Porous, non-macroporous, inorganic oxide carrier body for immobilizing microorganisms for bioremediation |
| CN107473398A (en) * | 2017-08-08 | 2017-12-15 | 航天凯天环保科技股份有限公司 | A kind of multi-functional denitrogenation dephosphorizing medicament and its preparation method and application |
| CN109012216A (en) * | 2018-08-23 | 2018-12-18 | 中冶华天工程技术有限公司 | New function ceramic membrane materials and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022166297A1 (en) * | 2021-02-03 | 2022-08-11 | 江苏科技大学 | Heavy metal repair material having ion adsorption coupled to microbial mineralization, preparation method therefor and application thereof |
| CN113209944A (en) * | 2021-05-21 | 2021-08-06 | 浙江华东建设工程有限公司 | Heavy metal passivator for immobilizing microorganisms on attapulgite-based carrier and preparation method thereof |
| CN113402211A (en) * | 2021-07-06 | 2021-09-17 | 中建安装集团有限公司 | Cement-based material with water purification function and preparation method and application thereof |
| CN114804360A (en) * | 2022-05-24 | 2022-07-29 | 湖南五方环境科技研究院有限公司 | Modified expanded perlite particles and preparation method and application thereof |
| CN114804360B (en) * | 2022-05-24 | 2023-06-02 | 湖南五方环境科技研究院有限公司 | Modified expanded perlite particles and preparation method and application thereof |
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