CN107413833A - The micro- plastics separation method of agricultural land soil polyethylene disperseed based on high-shear emulsifying - Google Patents
The micro- plastics separation method of agricultural land soil polyethylene disperseed based on high-shear emulsifying Download PDFInfo
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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
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/362—Embedding or analogous mounting of samples using continuous plastic film to mount sample
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Abstract
The present invention relates to the micro- plastics separation method of agricultural land soil polyethylene disperseed based on high-shear emulsifying, pollutant is separated as target to be less than the micro- plastics of 100 purposes in agricultural land soil, by tydrophilization technology, at room temperature, in 5 50mm2Stator under 5 30min are disperseed with 2000 10000r/min dispersion rate, suspension is filtered by vacuum after standing 1 4h, collects and is suspended in polyethylene in supernatant, separation and Extraction is carried out to the micro- plastics of polyethylene in agricultural land soil.This method is simple, easy to operate, will not cause secondary environmental pollution, and separation and Extraction effect is good, and the highest average rate of recovery of the micro- plastics of PE can reach 87%, and the micro- plastics sizes of PE of separation and Extraction are small.This method has the characteristics that separative efficiency is high, simple to operation, the micro- plastics particle diameter of extraction is small, environment-friendly.New method is provided to solve the separation and Extraction of the micro- plastic pollution things of PE in agricultural land soil environment.
Description
Technical field
The present invention relates to pollutant catabolic gene in Environmental Science and Engineering and environment remediation technical field, is related to a kind of persistence
The separating and extracting process of organic pollution-micro- plastics, it is more particularly to micro- based on the agricultural land soil polyethylene that high-shear emulsifying disperses
Plastics separation method.
Background technology
With widely using for polyethylene (PE) mulch film, farmland residual PE mulch films gradually increase over time, and pass through
Illumination, farming a series of physical, the chemical action such as are torn and gradually crushed, and degrade, and form a kind of new pollution on agricultural area source
The micro- plastics of thing-PE.Plastics of the diameter less than 5mm are defined in the world and are referred to as micro- plastics, over time passage and external force effect, should
Micro- plastics further crush, degrading forms smaller micro- plastics.Because micro- plastics are sufficiently small, may be eaten by organism,
Plant absorption, it can be accumulated in food chain；Micro- plastics and other pollutants are compound, may strengthen its toxic；Micro- plastics enter one
The phthalate harmful organic contaminants that step is broken, is discharged in degradation process may cause a series of lifes such as Soil Micro-environment pollution
State environmental problem.But because soil with organic matter, clay components are high, soil particle is small, and artificial farming is big etc. to soil disturbance
Factor, micro- plastics are constantly coated in soil particle, cause micro- plastics difficulty of separation and Extraction small size big, and technology is owed
Lack.Therefore, urgently studied for the separation and Extraction of the micro- plastics of agricultural land soil small-medium size.
At present, the separation and Extraction research of micro- plastics is mainly for micro- modeling in the sand of strand tidal flat and mud deposit
Material, such as week are pretty to disclose the separation of micro- plastics and its surface microscopic feature in the tidal flat soil of strand.The separation and Extraction of micro- plastics
Conventional separation method mainly includes (1) density fractionation；(2) separating extraction device method, still, classical Density Separation are used
The micro- plastics of method separation and Extraction only reach 39.8% rate of recovery, and utilize the isolated micro- plastics of separating flotation installation method to return
Yield also only reaches 50%, and the rate of recovery is all undesirable, also, arrives high density salting liquid no matter can all be used using that method,
Particularly NaI solution cost is high, causes separation sediment sample amount little, limits widely using for this method.
The content of the invention
To solve the problems, such as that above-mentioned existing method is present, it is an object of the invention to provide what is disperseed based on high-shear emulsifying
The micro- plastics separation method of agricultural land soil polyethylene, using the micro- plastics of agricultural land soil small-medium size as target separation product, there is provided a kind of
The separating and extracting process of micro- plastic pollution thing in agricultural land soil, this method use high-shear emulsifying process for dispersing, will include micro- modeling
The pedotheque of material high-speed motion in the rotor of laboratory dispersion mulser and stator gap, formed strong aquashear and
Turbulent flow, disperse soil particle, while produce centrifugation and the comprehensive function power such as extrude, mill, colliding, finally crush soil particle
Entirely, release is coated on micro- plastics therein, and by the optimization to separation and Extraction condition, reaches optimum emulsification separating effect, count
Calculate the rate of recovery.
The technical method has the characteristics that separative efficiency is high, simple to operation, the micro- plastics size of extraction is small, environment-friendly.
New approaches are provided to solve the separation and Extraction of micro- plastics in agricultural land soil environment, the separation and Extraction for micro- plastics in soil provides
A kind of new method.
To reach above-mentioned purpose, the technical scheme is that：
The micro- plastics separation method of agricultural land soil polyethylene disperseed based on high-shear emulsifying, to be less than 100 in agricultural land soil
The micro- plastics of purpose polyethylene are that target separates pollutant, by tydrophilization technology, at room temperature, in 5-50mm2Stator under with
2000-10000r/min dispersion rate disperses 5-30min, is filtered by vacuum suspension after standing 1-4h, and collection is suspended in
Polyethylene in clear liquid, separation and Extraction is carried out to the micro- plastics of polyethylene in agricultural land soil.
Further, the above method comprises the following steps that：
Step 1: the preparation containing micro- plastics soil：The a certain amount of unused mulch film blank pedotheque that will be gathered from farmland
Simply disperse, its soil moisture is adjusted to 40-80% using distilled water, then added the poly- second of powdery of 100 mesh sieves
Alkene mixes in right amount, PE is coated to completely in soil particle using artificial perturbation's method；
Step 2: high-shear emulsifying separates：Certain volume running water is added in cylindrical container, adds mixing cladding PE
Soil sample constant weight, at room temperature, in 5-50mm2Stator under with 2000-10000r/min dispersion rate disperse 5-
30min, suspension is filtered by vacuum after standing 1-4h, collects the polyethylene being suspended in supernatant, dried at 45-80 DEG C
The rate of recovery of the micro- plastics of PE is calculated after 2-6h, the experiment repeats 3-5 times, calculates average recovery rate, and to high cut disperse emulsification
Method optimizes, and selects optimal area stator, emulsion dispersion speed, emulsion dispersion time；
Step 3: under optimal screening conditions, PE in separation and Extraction soil is repeatedly accumulated using separation method in step 2
Micro- plastics simultaneously calculate average recovery rate, and same pedotheque repeated isolation is extracted 3 times by separation method in step 2, calculated total
The rate of recovery；The experiment repeats 3-5 times；
Separated Step 4: the inventive method is contrasted into mechanical mixing method, mechanical agitation NaCl partition methods and high-shear emulsifying
NaCl methods specify high cut disperse emulsification method to micro- in agricultural land soil to being coated on the rate of recovery of the micro- plastics of PE in soil particle
The separation and Extraction effect of plastics；
Step 5: the micro- modelings of PE in soil will be extracted by high-shear emulsifying separation method using the actual agricultural land soil of PE mulch films
Expect pollutant；
Step 6: using digital camera, the shape characteristic of Optical microscopy blank soil sample and the cladding micro- plastics of PE.
Further, in the step 1, soil and the polyethylene powder weight ratio of collection are 100-500:1-3.
Further, in the step 1, soil is to be gathered from Xinjiang Uygur Autonomous Regions Shihezi suburb farmland
Arrive.
Further, in the step 1, it can also directly choose soil containing micro- plastics and carry out step 2 and follow-up
Step operation.
Further, in the step 2, high cut disperse emulsification method is optimized, the optimal area of selection is determined
Son, emulsion dispersion speed, emulsion dispersion time is respectively：Optimal stator area 20mm2, emulsion dispersion speed 3500r/min, breast
Change jitter time is 10min.
Further, in the step 2, amount of water is the volume of 1/2 to 3/4 times of container volume, soil sample weight and water
Than for 1:5g/ml.
Further, in the step 2, container is specially 2L beakers, amount of water 1000-1500ml, and soil sample weight is
200-300g。
Relative to prior art, beneficial effects of the present invention are：
The micro- plastics separation method of agricultural land soil polyethylene that the present invention is disperseed based on high-shear emulsifying, with small in agricultural land soil
The micro- plastics of size are target separation product, there is provided the separating and extracting process of micro- plastic pollution thing, this method in a kind of agricultural land soil
Using high-shear emulsifying process for dispersing, will be transported at a high speed in the gap of the pedotheque comprising micro- plastics between rotor and stator
It is dynamic, strong aquashear and turbulent flow are formed, disperses soil particle, while produces centrifugation and the comprehensive function such as extrudes, mills, colliding
Power, finally make soil particle completely broken, release is wrapped in micro- plastics therein, and by the optimization to separation and Extraction condition,
Reach optimum emulsification separating effect, calculate the rate of recovery.
This method has the characteristics that separative efficiency is high, simple to operation, the micro- plastics size of extraction is small, environment-friendly.For solution
Certainly the separation and Extraction of micro- plastics provides new approaches in agricultural land soil environment, and the separation and Extraction for micro- plastics in soil provides one
The brand-new method of kind.
Brief description of the drawings
Fig. 1 is the contrast photo of blank soil sample (left a) and the soil sample (right b) of the artificial cladding micro- plastics of PE；
Fig. 2 is the micro- plastics (b) of PE- being suspended in after high cut disperse emulsification separation process (a) is stood on liquid level；
Fig. 3 is stator area and rate of recovery graph of a relation；
Fig. 4 is shear rate and rate of recovery graph of a relation；
Fig. 5 is emulsification pretreatment jitter time and rate of recovery graph of a relation；
Fig. 6 is the micro- plastic grain figures of PE- reclaimed after flotation is dried；
Fig. 7 is the control micro- plastic grains (a) of PE- and upper strata in suspension micro- plastic grain (b) figures of PE-；
Fig. 8 is separation and Extraction check experiment effect contrast figure, wherein (a) mechanical mixing method；(b) mechanical agitation NaCl flotation
Method；(c) high cut disperse emulsification NaCl floatations；(d) multiple high cut disperse emulsification method；
Fig. 9 is actual soil sample (a) and micro- plastics (b) using high cut disperse emulsification isolation technics separation and Extraction；
Figure 10 uses the micro- plastics microphotos of PE- in the actual soil of high cut disperse emulsification isolation technics separation and Extraction.
Embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawings and detailed description：
The micro- plastics separation method of agricultural land soil polyethylene disperseed based on high-shear emulsifying, to be less than 100 in agricultural land soil
The micro- plastics of purpose are that target separates pollutant, by tydrophilization technology, at room temperature, in 5-50mm2Stator under with 2000-
10000r/min dispersion rate disperses 5-30min, is filtered by vacuum suspension after standing 1-4h, and collection is suspended in supernatant
Polyethylene, to the micro- plastics of polyethylene in agricultural land soil carry out separation and Extraction.
Further, the above method comprises the following steps that：
Step 1: the preparation containing micro- plastics soil：The a certain amount of unused mulch film blank pedotheque that will be gathered from farmland
Simply disperse, its soil moisture is adjusted to 40-80% using distilled water, then added the poly- second of powdery of 100 mesh sieves
Alkene mixes in right amount, PE is coated to completely in soil particle using artificial perturbation's method；
Step 2: high-shear emulsifying separates：Certain volume running water is added in cylindrical container, adds mixing cladding PE
Soil sample constant weight, at room temperature, in 5-50mm2Stator under with 2000-10000r/min dispersion rate disperse 5-
30min, suspension is filtered by vacuum after standing 1-4h, collects the polyethylene being suspended in supernatant, dried at 45-80 DEG C
The rate of recovery of the micro- plastics of PE is calculated after 2-6h, the experiment repeats 3-5 times, calculates average recovery rate, and to high cut disperse emulsification
Method optimizes, and selects optimal area stator, emulsion dispersion speed, emulsion dispersion time；
Step 3: under optimal screening conditions, PE in separation and Extraction soil is repeatedly accumulated using separation method in step 2
Micro- plastics simultaneously calculate average recovery rate, and same pedotheque repeated isolation is extracted 3 times by separation method in step 2, calculated total
The rate of recovery；The experiment repeats 3-5 times；
Separated Step 4: the inventive method is contrasted into mechanical mixing method, mechanical agitation NaCl partition methods and high-shear emulsifying
NaCl methods determine high cut disperse emulsification method to micro- in agricultural land soil to being coated on the rate of recovery of the micro- plastics of PE in soil particle
The separation and Extraction performance of plastics；
Step 5: the micro- modelings of PE in soil will be extracted by high-shear emulsifying separation method using the actual agricultural land soil of PE mulch films
Expect pollutant；
Step 6: using digital camera, the shape characteristic of Optical microscopy blank soil sample and the cladding micro- plastics of PE.
Further, in the step 1, soil and the polyethylene powder weight ratio of collection are 100-500:1-3.
Further, in the step 1, soil is to be gathered from Xinjiang Uygur Autonomous Regions Shihezi suburb farmland
Arrive.
Further, in the step 1, it can also directly choose soil containing micro- plastics and carry out step 2 and follow-up
Step operation.
Further, in the step 2, high cut disperse emulsification method is optimized, the optimal area of selection is determined
Son, emulsion dispersion speed, emulsion dispersion time is respectively：Optimal stator area 20mm2, emulsion dispersion speed 3500r/min, breast
Change jitter time is 10min.
Further, in the step 2, amount of water is the volume of 1/2 to 3/4 times of container volume, soil sample weight and water
Than for 1:5g/ml.
Further, in the step 2, container is specially 2L beakers, amount of water 1000-1500ml, and soil sample weight is
200-300g。
Embodiment 1
Coat the PE preparations of soil sample：At room temperature, mulch film blank soil-like first is not used in the 100-500g gathered from farmland
Product simply disperse, and are 40-80% by its soil moisture regulation humidity, then add the polyethylene powder 1- of 100 mesh sieves
3g, mixed using artificial perturbation's method, the micro- plastics of PE is coated to completely in soil particle, as shown in Figure 1.
Embodiment 2
Micro- plastics in high-shear emulsifying dispersion method extraction cladding PE soil samples：1000-1500mL is added in 2L beakers originally
Water, the soil sample 200-300g that the cladding micro- plastics of PE are mixed using artificial perturbation is added, at room temperature, in 5-50mm2Stator under with
2000-10000r/min shearing dispersion and emulsion speed disperses 5-30min, is filtered by vacuum supernatant after standing 1-4h, collects
The micro- plastics of PE being suspended in supernatant, after drying 2-6h at 45-80 DEG C, calculate the rate of recovery of the micro- plastics of PE, the experiment
Repeat 3-5 time, average yield swims in the micro- plastics of PE- on liquid level up to 69% after tydrophilization process and standing separation, such as figure
Shown in 2.
Embodiment 3
The condition optimizing of the micro- plastics of high cut disperse emulsification method separation and Extraction：
A. stator optimizes：It is certain to shear dispersion rate 2000-10000r/min, certain time 5-30min condition in room temperature
The stator area of lower optimum choice suitable area：5mm2, 20mm2, 50mm2Carry out shearing the micro- plastics experiments of scattered extraction PE, repeat
3-5 times, the highest average rate of recovery is up to 69%, it is determined that the use of the optimal area of stator being 20mm2, as shown in Figure 3.
B. dispersion rate optimization is sheared：In room temperature, optimal stator area, certain time：Optimizing shear under the conditions of 5-30min
Dispersion and emulsion speed：2500,3500,4000,4500,5000,7500r/min.Under these experimental conditions, using different shearings
Dispersion and emulsion speed carry out the micro- plastics of separation and Extraction PE, test it is parallel repeat 3-5 groups, the highest average rate of recovery up to 71%, it is determined that
The optimal shearing dispersion and emulsion speed 3500r/min of optimal use stator, as shown in Figure 4.
C. dispersion and emulsion is time-optimized：It is optimal to shear dispersion and emulsion speed in room temperature, optimize under the conditions of optimal stator area
The separation and Extraction time：5,10,15,20,30min.The micro- plastics of separation and Extraction PE under different time, parallel repetition 3-5 groups are tested,
The highest average rate of recovery is up to 82%, it is determined that the most preferably shearing dispersion and emulsion time is 10min, as shown in Figure 5.
Embodiment 4
Under optimum optimizing condition, using the micro- plastics of PE in high-shear emulsifying process for dispersing separation and Extraction soil, the rate of recovery
Reach 82%, repeatedly accumulate the micro- plastics of PE in the same pedotheque of separation and Extraction by using high-shear emulsifying process for dispersing and count
Average recovery rate is calculated, is repeated 3 times, the overall average rate of recovery can reach 87%, further improve the rate of recovery of the micro- plastics of PE.Using number
The air supporting of the micro- plastic grains of PE- and colloid bubble to the micro- plastics of PE is reclaimed in code-phase machine and light microscope, observation flotation after drying
Effect, such as Fig. 6, shown in 7.
Embodiment 5
Check experiment：
A. mechanical agitation：1000-1500mL running water is added in 2L beakers, adds the mixing that artificial perturbation is well mixed
Soil sample 200-300g, at room temperature, 5-30min is stirred with certain stir speed (S.S.) 2000-10000r/min, will after standing 1-4h
Supernatant vacuum filter, collects the micro- plastics of PE of suspension, and the experiment repeats 3-5 times, and average yield is up to 49%.
B. mechanical agitation NaCl floatations：1000-1500mL NaCl saturated solutions are added in 2L beakers, are added artificial
The well mixed mixed soil sample 200-300g of disturbance, at room temperature, 5- is stirred with certain stir speed (S.S.) 2000-10000r/min
30min, after standing 1-4h, supernatant is filtered by vacuum, collects the micro- plastics of PE of suspension, the experiment repeats 3-5 times, average yield
Up to 75%.
C. high-shear emulsifying disperses NaCl floatations：1000-1500mL saturation NaCl solutions are added in 2L beakers, are added
The mixed soil sample 200-300g that artificial perturbation is well mixed, according to the micro- plastics of methods described separation and Extraction PE- of embodiment 2, repeat
3-5 times, average yield is up to 51%.
Found by control experiment, repeatedly accumulative high-shear emulsifying process for dispersing is to the micro- plastics separation and Extractions of PE in soil
Best results, the micro- plastics recovery rates of PE in soil can reach 87%, as shown in figure 8, wherein (a) mechanical mixing method；(b) it is mechanical
Stir NaCl floatations；(c) high cut disperse emulsification NaCl floatations；(d) multiple high cut disperse emulsification method.
Embodiment 6
Tydrophilization is carried out to micro- plastics in actual agricultural land soil using high-shear emulsifying process for dispersing：Add in 2L beakers
Enter 1000-1500mL running water, add actual agricultural land soil sample 200-300g, under the conditions of optimum optimization tydrophilization repeatedly
The micro- plastics of PE in separation and Extraction agricultural land soil, the experiment repeat 3-5 times, collect micro- plastics in agricultural land soil, and using digital
Camera and light microscope, the micro- plastics pattern of actual soil sample, separation and Extraction PE- is observed, such as Fig. 9, shown in 10, finds micro- plastics
Mainly exist with fiber and laminated structure.
Using micro- plastics of high-shear emulsifying process for dispersing separation and Extraction soil small-medium size, substituted completely using running water
Highdensity salting liquid, the secondary pollution of environment will not also be caused by not only reducing cost, and the size for extracting micro- mulch film is small, separation
Extraction effect is good, and the highest average rate of recovery of the micro- plastics of PE can reach 87%.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
The change or replacement expected without creative work, it should all be included within the scope of the present invention.Therefore, it is of the invention
Protection domain should be determined by the scope of protection defined in the claims.
Claims (8)
1. the micro- plastics separation method of agricultural land soil polyethylene disperseed based on high-shear emulsifying, it is characterised in that with agricultural land soil
In be less than the micro- plastics of 100 purposes be target separate pollutant, by tydrophilization technology, at room temperature, in 5-50mm2Stator under
5-30min is disperseed with 2000-10000r/min dispersion rate, is filtered by vacuum suspension after standing 1-4h, collection is suspended in
Micro- plastics in supernatant, separation and Extraction is carried out to the micro- plastics of polyethylene in agricultural land soil.
2. the micro- plastics separation method of agricultural land soil polyethylene disperseed based on high-shear emulsifying according to claims 1,
Characterized in that, comprise the following steps that：
Step 1: the preparation containing micro- plastics soil：The a certain amount of unused mulch film blank pedotheque gathered from farmland is carried out
It is simple scattered, its soil moisture is adjusted to 40-80% using distilled water, the polyethylene powder for then adding 100 mesh sieves is fitted
Amount mixing, makes PE be coated to completely in soil particle using artificial perturbation's method；
Step 2: high-shear emulsifying separates：Certain volume running water is added in cylindrical container, adds mixing cladding PE soil
Sample constant weight, at room temperature, in 5-50mm2Stator under with 2000-10000r/min dispersion rate disperse 5-30min, it is quiet
Suspension is filtered by vacuum after putting 1-4h, collects the polyethylene being suspended in supernatant, is counted after drying 2-6h at 45-80 DEG C
The rate of recovery of the micro- plastics of PE is calculated, the experiment repeats 3-5 times, calculates average recovery rate, and high cut disperse emulsification method is carried out
Optimization, selects optimal area stator, emulsion dispersion speed, emulsion dispersion time；
Step 3: under optimal screening conditions, the micro- modelings of PE in separation and Extraction soil are repeatedly accumulated using separation method in step 2
Expect and calculate average recovery rate, same pedotheque repeated isolation is extracted 3 times by separation method in step 2, calculates total recovery
Rate；The experiment repeats 3-5 times；
Step 4: the inventive method is contrasted into mechanical mixing method, mechanical agitation NaCl partition methods and high-shear emulsifying separates NaCl
Method determines high cut disperse emulsification method to micro- plastics in agricultural land soil to being coated on the rate of recovery of the micro- plastics of PE in soil particle
Separation and Extraction performance；
Step 5: will be dirty by the micro- plastics of PE in high-shear emulsifying separation method extraction soil using the actual agricultural land soil of PE mulch films
Contaminate thing；
Step 6: using digital camera, the shape characteristic of observation by light microscope blank soil sample and the cladding micro- plastics of PE.
3. the agricultural land soil polyethylene micro- plastics separation method according to claim 2 disperseed based on high-shear emulsifying, its
It is characterised by, in the step 1, soil and the polyethylene powder weight ratio of collection are 100-500:1-3.
4. the agricultural land soil polyethylene micro- plastics separation method according to claim 2 disperseed based on high-shear emulsifying, its
It is characterised by, in the step 1, soil is to be collected from Xinjiang Uygur Autonomous Regions Shihezi suburb farmland.
5. the agricultural land soil polyethylene micro- plastics separation method according to claim 2 disperseed based on high-shear emulsifying, its
It is characterised by, in the step 1, can also directly chooses the soil containing micro- plastics and carry out step 2 and subsequent step operation.
6. the agricultural land soil polyethylene micro- plastics separation method according to claim 2 disperseed based on high-shear emulsifying, its
It is characterised by, in the step 2, high cut disperse emulsification method is optimized, the optimal area stator of selection, emulsification point
Dissipate speed, the emulsion dispersion time is respectively：Optimal stator area 20mm2, emulsion dispersion speed 3500r/min, emulsion dispersion when
Between be 10min.
7. the agricultural land soil polyethylene micro- plastics separation method according to claim 2 disperseed based on high-shear emulsifying, its
It is characterised by, in the step 2, amount of water is 1/2 to 3/4 times of container volume, and the volume ratio of soil sample weight and water is 1:
5g/ml。
8. the agricultural land soil polyethylene micro- plastics separation method according to claim 2 disperseed based on high-shear emulsifying, its
It is characterised by, in the step 2, container is specially 2L beakers, and amount of water 1000-1500ml, soil sample weight is 200-
300g。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110186863A (en) * | 2019-05-08 | 2019-08-30 | 浙江工业大学 | Method for detecting degradation condition of mulch source micro-plastic in soil |
| CN112005094A (en) * | 2018-03-07 | 2020-11-27 | 玛格丽特·安娜·莱蒂齐娅·费兰特 | Method for extracting and measuring micro-plastics in sample containing organic and inorganic matrix |
| CN112577805A (en) * | 2019-09-27 | 2021-03-30 | 香港城市大学深圳研究院 | Method for separating micro-plastic from organic matter-rich sediment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112005094A (en) * | 2018-03-07 | 2020-11-27 | 玛格丽特·安娜·莱蒂齐娅·费兰特 | Method for extracting and measuring micro-plastics in sample containing organic and inorganic matrix |
| CN110186863A (en) * | 2019-05-08 | 2019-08-30 | 浙江工业大学 | Method for detecting degradation condition of mulch source micro-plastic in soil |
| CN112577805A (en) * | 2019-09-27 | 2021-03-30 | 香港城市大学深圳研究院 | Method for separating micro-plastic from organic matter-rich sediment |
| CN112577805B (en) * | 2019-09-27 | 2022-09-13 | 香港城市大学深圳研究院 | Method for separating micro plastic from sediment rich in organic matters |
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