CN107649498A - A kind of method that Activated Sludge Modification clay mineral suppresses plant absorption Fluoride In Soils - Google Patents
A kind of method that Activated Sludge Modification clay mineral suppresses plant absorption Fluoride In Soils Download PDFInfo
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- CN107649498A CN107649498A CN201710718629.3A CN201710718629A CN107649498A CN 107649498 A CN107649498 A CN 107649498A CN 201710718629 A CN201710718629 A CN 201710718629A CN 107649498 A CN107649498 A CN 107649498A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Mycology (AREA)
- Treatment Of Sludge (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The present invention is a kind of method that activated sludge modified clay mineral suppresses plant absorption Fluoride In Soils.Technical scheme comprises the following steps：(1) measure clear water to be put into container, add a certain amount of glucose, general calcium, urea, being sufficiently stirred makes its dissolving；(2) activated sludge is as strain in collection municipal sewage plant's biochemistry pool, in the container in putting it into step (1), adds clay mineral and simultaneously stirs, then carry out intermittent aeration；(3) after aeration terminates, add calcium chloride and stir, staticly settle；By step (3) in isolated sediment be collected after eluted with clear water, then carry out high-temperature process, obtain the clay mineral of Activated Sludge Modification；(5) the Activated Sludge Modification clay mineral is added in the arable layer of fluoride pollution soil, the general planting of mixing of digging, then progress plant.The present invention is simple to operate, and cost is cheap, and the fluorine element in soil can be fixed in clay mineral space structure, so as to effectively inhibit the absorption of plant.
Description
Technical field
The invention belongs to soil pollution recovery technique field, specifically a kind of activated sludge modified clay mineral suppresses plant
Absorb the method for Fluoride In Soils.
Background technology
Fluorine (fluorine, F) though be one of trace element of body normal physiological activity, can if the mankind such as excess ingestion
Cause the fluorine poisoning symptom such as fluorosis of bone, den tal fluorosis, brain damage, referred to as endemic fluorosis, be commonly called as endemia fluorosis.Disease category is typical
Geo-chemical disease, involves world many countries and area, and China belongs to the high distribution country of endemia fluorosis.Endemia fluorosis generally divides
For drinking water type, food type, coal-burning and the major class of mixed type four.The endemia fluorosis that Fluorine Pollution In Soil triggers belongs to mixed type, i.e. soil
Fluoride pollution can pollute phreatic water, so as to turn into drinking water type endemia fluorosis source by the effect such as diafiltration.Meanwhile Fluoride In Soils are dirty
Dye can be also accumulated in plant because of plant absorption, should by directly eating vegetables and fruits grain therein or eating feeding indirectly
The poultry meat of high fluorine plant, and absorbed by the mankind, i.e., health is influenceed by food chain.Therefore, to Fluorine Pollution In Soil
Repaired, by suppressing absorption of the plant to fluorine so as to hindering it to be had important practical significance into food chain.
At present, the recovery technique research and development to inorganic pollution in soil focus mostly on more in heavy metal field, related ends.But
Heavy metal belongs to cation, and fluorine generally exists with anionic form, has the area of essence on Treatment process and application effect
Not.Recovery technique report on Fluorine Pollution In Soil is relatively fewer.
Patent of invention CN201510728049.3 discloses a kind of renovation agent and restorative procedure of fluoride pollution soil, mainly makes
With modified peat, calcium magnesium phosphate and calcium carbonate, calcium oxide, calcium hydroxide etc., it is configured to suspension and soil is poured
Fill, the fluorine ion of the adsorbable precipitation water-soluble state of this method is preferable to drinking water type fluoride pollution effect.Patent of invention
CN201310195260.4 discloses a kind of method for reducing content of water-soluble fluorine in soil, by tannin and Al3+、Fe3+、Ce3+、Zr4+
Plasma is made the adsorbent of water-soluble state fluorine, and with the mixed and modified use of " NPK- humic acids " slow-release fertilizer, water-soluble state fluorine can be consolidated
It is scheduled in soil, and reduces its harm to crop to a certain extent.
The above method uses the industrial material of external source, palpus great care in operating process, necessarily secondary be present to soil
Pollution risk.In addition, the reparation to fluoride pollution soil is mainly for water-soluble state fluorine, and root system of plant is to nutriment in soil
Although absorb has some associations with water-soluble state, as biological transmission means, strand length, the molecular weight for absorbing object are big
The factors such as small, surface group property have significant effect effect.
Therefore, Fluorine Pollution In Soil is repaired, it is significant to reduce its influence to human health, and current phase
Close recovery technique and certain limitation be present, the method that exploitation suppresses plant absorption Fluoride In Soils has feasibility and application prospect.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of clay mineral using in natural soil as main component, profit
After carrying out activation modification to its surface texture with activated sludge, effectively suppress the side of plant absorption Fluoride In Soils as soil additive
Method.This method is simple to operate, cost is cheap, to soil environment close friend and has no side effect, can substantially reduce plant to fluorine in soil
The absorption of element, so as to reduce harm of the Fluorine Pollution In Soil to human body in the food end of the chain.
Technical scheme is as follows：A kind of Activated Sludge Modification clay mineral suppresses the side of plant absorption Fluoride In Soils
Method, comprise the following steps：
(1) measure clear water to be put into container, add a certain amount of glucose, general calcium, urea, being sufficiently stirred makes its dissolving；
(2) activated sludge is as strain in collection municipal sewage plant's biochemistry pool, the container in putting it into step (1)
It is interior, add clay mineral and stir, then carry out intermittent aeration；
(3) after aeration terminates, add calcium chloride and stir, staticly settle；
By step (3) in isolated sediment be collected after eluted with clear water, then carry out high-temperature process, obtain
To the clay mineral of Activated Sludge Modification；
(5) the appropriate Activated Sludge Modification clay mineral, mixing of digging, Ran Houjin are added in the arable layer of fluoride pollution soil
The general planting of row plant.
In the method that a kind of described Activated Sludge Modification clay mineral suppresses plant absorption Fluoride In Soils, the step is (1)
In the proportioning of each raw material be in 1m3In clear water, 200~300g of glucose, 9~13g of general calcium, 30~45g of urea are added.
In the method that a kind of described Activated Sludge Modification clay mineral suppresses plant absorption Fluoride In Soils, the step is (2)
The addition of middle activated sludge and clay mineral is：1m3In clear water, 1.0~1.5kg of activated sludge is added (with amount of dry matter
Meter), 10~15kg of clay mineral.
In the method that a kind of described Activated Sludge Modification clay mineral suppresses plant absorption Fluoride In Soils, described clay
Montmorillonite race, kaolinite race and the vermiculite race mineral of the preferred calcium fundamental mode of mineral.
In the method that a kind of described Activated Sludge Modification clay mineral suppresses plant absorption Fluoride In Soils, the step is (2)
Intermittent aeration was taken at interval of 2~3 hours, and the continuous aeration mode of 6~8 hours, total aeration time is with particle surface shape
It is defined into biomembrane, preferably 3~5 days, aeration quantity size should make activated sludge and clay mineral are defined in fluidized state, as
It is preferred that unit area aeration quantity of the present invention is 3~4m3/h。
In the method that a kind of described Activated Sludge Modification clay mineral suppresses plant absorption Fluoride In Soils, the step is (3)
The addition of middle calcium chloride is：In 1m3In clear water, 0.3~0.5kg of calcium chloride is added.
In the method that a kind of described Activated Sludge Modification clay mineral suppresses plant absorption Fluoride In Soils, the step is (4)
Middle sediment is eluted 2~3 times after being collected with clear water, then with 120 DEG C of 15~30min of high-temperature process.
In the method that a kind of described Activated Sludge Modification clay mineral suppresses plant absorption Fluoride In Soils, the step is (5)
In the plough horizon thickness that is mixed with Activated Sludge Modification clay mineral be 15~20cm, the Activated Sludge Modification clay pit
Thing addition is 10%~15% with the topsoil volume ratio.
The present invention has the advantages that：
(1) of the invention simple to operate, cost is cheap, can be fixed on the fluorine element in soil by the effect such as adsorbing, chelating
In clay mineral space structure, so as to effectively inhibit absorption of the plant to the element, reduce fluorine element and moved through the food end of the chain
The risk moved in organism；
(2) clay mineral is the constituent of natural soil, good with soil amalgamation.The special crystal space of clay mineral
Structure makes it have larger surface area, complexing power and ion-exchange capacity, can not only be reacted with organic substance to be formed it is compound
Body, and the cation such as Ca, Mg therein and fluorine ion can form stronger combination bonding force.
(3) activated sludge can form biomembrane, and secrete substantial amounts of born of the same parents in the case where being aerated aerobic state on clay mineral surface
Outer polymer, these biomolecule can be plugged into inside clay mineral crystal structure, be formed organic with nanoscale effect
Complex, the strand combined with fluorine ion is longer, and molecular weight is bigger, and molecular structure is more stable；
(4) the present invention is enriched using the activated sludge of municipal wastewater treatment plant as strain, phage structure type, biological property compared with
It is good.Biofilm means are aerated by strain, the microorganism largely newly bred can effectively reduce heavy metal etc. in municipal wastewater treatment plant and pollute
The higher risk of material concentration, eliminates the secondary pollution to soil.
(5) the present invention is removed soluble organic complex and surface ion, to reduce itself and soil by leaching
After fluorine combines, the negative effect to biological effectiveness.Meanwhile by the addition of high-temperature process and external source calcium chloride, make biomembrane
Cell and mucilage secretion expose more carboxyls, hydroxyl, aldehyde radical isoreactivity group, increase the surface of modified clay mineral
Binding site, acted on by the crane span structure of cation to chelate more fluorine ions and fluoride.
Embodiment
The present invention is described further with reference to specific embodiment, but scope of the present invention not limited to this.
Embodiment 1
A kind of method that Activated Sludge Modification clay mineral suppresses plant absorption Fluoride In Soils, comprises the following steps：
(1) clear water 10m is measured3It is put into pond, adds glucose 2300g, general calcium 120g, urea 430g, being sufficiently stirred makes
It dissolves；
(2) activated sludge 13kg in municipal sewage plant's biochemistry pool is added into pond and is used as bacterium (using dry gauge)
Kind, clay mineral 120kg, stir；Unit area aeration quantity is used as 3.8m3/ h blower fan, it is continuous at interval of 2.5 hours
Aeration stops aeration after 6 hours, 5 days；
(3) calcium chloride 4.3kg is added into pond and is stirred, is staticly settled,
(4) eluted 3 times with clear water after sediment is collected, 120 DEG C of high-temperature process 25min, obtain Activated Sludge Modification
Clay mineral；
(5) the Activated Sludge Modification clay mineral about 1.5cm thickness is added in the arable layer 15cm of fluoride pollution soil, is made
Its volume accounts for 10% or so of the topsoil volume, mixing of digging, planting vegetable melon and fruit.
Do not add the Activated Sludge Modification clay mineral on the fluoride pollution soil separately, directly plant same crop as empty
The processing modes such as white control, later stage watering, fertilizing and dosage are consistent.Plant edible food position Oil repellent is detected after harvest, it is as follows：
Embodiment 2
(1) clear water 10m is measured3It is put into pond, adds glucose 2800g, general calcium 100g, urea 380g, being sufficiently stirred makes
It dissolves；
(2) add activated sludge 12kg in municipal sewage plant's biochemistry pool and be used as strain, clay (using dry gauge)
Mineral 130kg, stirs；Unit area aeration quantity is used as 3.5m3/ h blower fan is small at interval of 2 hours continuous aerations 8
When, after 4 days, stop aeration；
(3) add calcium chloride 3.5kg and stir, staticly settle；
(4) eluted 2 times with clear water after and then sediment is collected, 120 DEG C of high-temperature process 30min, obtain activated sludge
Modified clay mineral；
(5) the Activated Sludge Modification clay mineral is added in the arable layer 20cm of fluoride pollution soil, its volume is accounted for this and ploughs
Make 15% or so of layer soil volume, mixing of digging, long-term cropping.
Do not add the Activated Sludge Modification clay mineral on the fluoride pollution soil separately, directly plant same crop as empty
The processing modes such as white control, later stage watering, fertilizing and dosage are consistent.Plant edible food position Oil repellent is detected after harvest, it is as follows：
Embodiment 3
(1) clear water 10m is measured3It is put into pond, adds glucose 2100g, general calcium 95g, urea 320g, being sufficiently stirred makes
It dissolves；
(2) add activated sludge 11kg in municipal sewage plant's biochemistry pool and be used as strain, clay (using dry gauge)
Mineral 150kg, stirs；Unit area aeration quantity is used as 4.0m3/ h blower fan is small at interval of 3 hours continuous aerations 7
When, after 3 days, stop aeration；
(3) add calcium chloride 4kg and stir, staticly settle；
(4) eluted 3 times with clear water after sediment is collected, 120 DEG C of high-temperature process 20min, obtain Activated Sludge Modification
Clay mineral；
(5) the Activated Sludge Modification clay mineral is added in the arable layer 15cm of uncontaminated soil, its volume is accounted for this and ploughs
Make 13% or so of layer soil volume, mixing of digging, planting vegetable melon and fruit, poured with fluoride pollution water source.
Do not add the Activated Sludge Modification clay mineral on the soil separately, directly plant same crop as blank pair
According to the processing mode such as later stage watering, fertilizing and dosage are consistent.Plant edible food position Oil repellent is detected after harvest, it is as follows：
Claims (9)
1. a kind of method that Activated Sludge Modification clay mineral suppresses plant absorption Fluoride In Soils, it is characterised in that this method is included such as
Lower step：
(1) measure clear water to be put into container, add a certain amount of glucose, general calcium, urea, being sufficiently stirred makes its dissolving；
(2) activated sludge in municipal sewage plant's biochemistry pool is collected, as strain, in the container in putting it into step (1), to add
Enter clay mineral and stir, then carry out intermittent aeration；
(3) after aeration terminates, add calcium chloride and stir, staticly settle；
By step (3) in isolated sediment be collected after eluted with clear water, then carry out high-temperature process, lived
The clay mineral of property sludge modification；
(5) the appropriate Activated Sludge Modification clay mineral is added in the arable layer of fluoride pollution soil, mixing of digging, then planted
The general planting of thing.
2. the method that a kind of Activated Sludge Modification clay mineral according to claim 1 suppresses plant absorption Fluoride In Soils, its
The proportioning of each raw material is in 1m in being characterised by the step (1)3In clear water, add glucose 200~300g, 9~13g of general calcium,
30~45g of urea.
3. the method that a kind of Activated Sludge Modification clay mineral according to claim 1 or 2 suppresses plant absorption Fluoride In Soils,
It is characterized in that the step (2) middle activated sludge and clay mineral addition proportioning be：1m3In clear water, activated sludge is added
1.0~1.5kg (with dry gauge), 10~15kg of clay mineral.
4. the method that a kind of Activated Sludge Modification clay mineral according to claim 3 suppresses plant absorption Fluoride In Soils, its
It is characterised by the heavy one or more of montmorillonite race, kaolinite race and vermiculite race mineral that described clay mineral is calcium fundamental mode.
5. the method that a kind of Activated Sludge Modification clay mineral according to claim 1 or 2 suppresses plant absorption Fluoride In Soils,
It is characterized in that the step (2) in intermittent aeration take at interval of 2~3 hours, the continuous aeration mode of 6~8 hours,
Total aeration time forms biomembrane with particle surface and is limited, and aeration quantity size should make activated sludge and clay mineral be in fluidisation shape
State is limited.
6. the method that a kind of Activated Sludge Modification clay mineral according to claim 5 suppresses plant absorption Fluoride In Soils, its
It is characterised by that described unit area aeration quantity is 3~4m3/ h, aeration time are 3~5 days.
7. the method that a kind of Activated Sludge Modification clay mineral according to claim 1 or 2 suppresses plant absorption Fluoride In Soils,
It is characterized in that the addition of the step (3) middle calcium chloride is：In 1m3In clear water, 0.3~0.5kg of calcium chloride is added.
8. the method that a kind of Activated Sludge Modification clay mineral according to claim 1 or 2 suppresses plant absorption Fluoride In Soils,
It is characterized in that the step is eluted 2~3 times with clear water after (4) middle sediment is collected, then with 120 DEG C of high-temperature process 15
~30min.
9. the method that a kind of Activated Sludge Modification clay mineral according to claim 1 or 2 suppresses plant absorption Fluoride In Soils,
It is characterized in that the step (5) in the plough horizon thickness that is mixed with Activated Sludge Modification clay mineral be 15~20cm, institute
It is 10%~15% that Activated Sludge Modification clay mineral addition, which is stated, with the topsoil volume ratio.
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| CN201710718629.3A CN107649498B (en) | 2017-08-21 | 2017-08-21 | Method for inhibiting plants from absorbing soil fluorine by using activated sludge modified clay mineral |
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Cited By (3)
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| CN109731901A (en) * | 2019-01-14 | 2019-05-10 | 北京泷涛环境修复有限公司 | A kind of the stabilisation reparation medicament and restorative procedure of fluoride pollution soil |
| CN110055075A (en) * | 2019-04-12 | 2019-07-26 | 中节能大地环境修复有限公司 | A kind of compound drug and its application method for acidic fluoride contaminated soil |
| CN113020242A (en) * | 2021-03-11 | 2021-06-25 | 中铝环保生态技术(湖南)有限公司 | Fluorine-contaminated soil remediation agent and laboratory application method |
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| CN113020242A (en) * | 2021-03-11 | 2021-06-25 | 中铝环保生态技术(湖南)有限公司 | Fluorine-contaminated soil remediation agent and laboratory application method |
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| CN107649498B (en) | 2022-12-13 |
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