CN112985898A - Method for extracting micro-plastic from recycled plastic or waste plastic - Google Patents
Method for extracting micro-plastic from recycled plastic or waste plastic Download PDFInfo
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- CN112985898A CN112985898A CN202110183321.XA CN202110183321A CN112985898A CN 112985898 A CN112985898 A CN 112985898A CN 202110183321 A CN202110183321 A CN 202110183321A CN 112985898 A CN112985898 A CN 112985898A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 76
- 239000004033 plastic Substances 0.000 title claims abstract description 76
- 239000002699 waste material Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000000605 extraction Methods 0.000 claims abstract description 37
- 238000012216 screening Methods 0.000 claims abstract description 17
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000003153 chemical reaction reagent Substances 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 229920000426 Microplastic Polymers 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 4
- NHTMVDHEPJAVLT-UHFFFAOYSA-N Isooctane Chemical compound CC(C)CC(C)(C)C NHTMVDHEPJAVLT-UHFFFAOYSA-N 0.000 claims description 3
- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 claims description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 2
- 238000002137 ultrasound extraction Methods 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 230000015843 photosynthesis, light reaction Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
-
- 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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- 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
- G01N1/34—Purifying; Cleaning
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Hydrology & Water Resources (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a method for extracting micro-plastic from reclaimed plastic or waste plastic, which belongs to the technical field of material extraction and comprises the following steps: (1) crushing treatment, (2) screening treatment, (3) cleaning and drying treatment, and (4) extracting treatment. The invention discloses a method for extracting micro-plastic from recycled plastic or waste plastic, which has simple operation and reliable result and has important evaluation significance on the risk of micro-plastic release in the recycled plastic or the waste plastic.
Description
Technical Field
The invention belongs to the technical field of material extraction, and particularly relates to a method for extracting micro-plastic from recycled plastic or waste plastic.
Background
Microplastic refers to solid plastic particles less than 5mm in diameter. The micro plastic is difficult to degrade after entering the environment, not only causes great harm to the natural environment and the ecological system, but also threatens human beings through a food chain, the pollution problem thereof arouses global attention, and the detection of the micro plastic is a hotspot of research. The plastic is broken into micro-plastics through photolysis, weathering and other processes, and the main mode of entering the environment is the plastic. The waste or regenerated process always has broken chains and degradation along with polymer molecular chains, so that the waste plastics obtained from various reasons such as aging, embrittlement and the like or the recycled plastics recycled at a certain temperature have high risk of producing micro plastics, and the method is very important for detection and risk evaluation of the micro plastics in the waste plastics and the recycled plastics. At present, the detection of the micro-plastics is mainly focused on the environments such as water, soil, animal bodies and the like, and the research on the micro-plastics derived from the plastic body is less.
The precondition of detection is extraction, which in the prior art is generally realized by physical methods. For example, the extraction of micro-plastics in water mainly uses trawl, sieve and pump. The extraction of the micro-plastic in the soil environment comprises the steps of directly sampling by using tweezers, and screening and collecting the micro-plastic. The air environment is enriched with floating micro plastic in atmosphere by pump, and the sediment in air is collected by vacuum cleaner or air filter. The above operation mode is complicated and not beneficial to experimental research.
Disclosure of Invention
The invention aims to provide a method for extracting micro-plastics from reclaimed plastics or waste plastics, which combines physical and chemical methods to extract the micro-plastics from the reclaimed plastics or the waste plastics.
The technical purpose of the invention is realized by the following technical scheme:
a method for extracting micro-plastic from recycled plastics or waste plastics comprises the following steps:
(1) crushing treatment:
crushing recycled plastics or waste plastics into granular, blocky or flaky samples with the size of more than 5 mm;
(2) screening treatment:
screening the sample obtained in the step (1) by using a 5mm sieve, and taking the sample with the size larger than 5mm as an analysis sample;
(3) cleaning and drying:
cleaning and drying the analysis sample obtained in the step (2);
(4) extraction treatment:
and (4) placing the sample obtained in the step (3) into an extraction reagent, extracting under different extraction conditions, screening out the sample with the size larger than 5mm by using a 5mm sieve, and removing the extraction reagent from the rest part.
Further, the extraction reagent in the step (4) is any one of water, saturated saline, a 10% ethanol solution, a 50% ethanol solution, a 95% ethanol solution, n-hexane and isooctane.
Further, the extraction conditions in the step (4) are any one of the following conditions: extracting at 40 deg.C for 2h, extracting at 40 deg.C for 10d, extracting at 100 deg.C for 2h, extracting at 40 deg.C by shaking for 10d, and extracting at 40 deg.C by ultrasonic extraction for 2 h.
Compared with the prior art, the invention has the following advantages:
the invention discloses a method for extracting micro-plastic from recycled plastic or waste plastic, which has simple operation and reliable result and has important evaluation significance on the risk of micro-plastic release in the recycled plastic or the waste plastic.
Detailed Description
Example 1
A method for extracting micro-plastic from recycled plastics or waste plastics comprises the following steps:
(1) crushing treatment:
crushing recycled plastics or waste plastics into granular, blocky or flaky samples with the size of more than 5 mm;
(2) screening treatment:
screening the sample obtained in the step (1) by using a 5mm sieve, and taking the sample with the size larger than 5mm as an analysis sample;
(3) cleaning and drying:
cleaning and drying the analysis sample obtained in the step (2);
(4) extraction treatment:
and (4) placing the sample obtained in the step (3) into an extraction reagent, extracting under different extraction conditions, screening out the sample with the size larger than 5mm by using a 5mm sieve, and removing the extraction reagent from the rest part.
And finally, detecting and analyzing the micro plastic obtained by extraction.
The extraction reagent in the step (4) is water.
The extraction conditions in the step (4) are as follows: extracting at 40 deg.C for 2 h.
Example 2
A method for extracting micro-plastic from recycled plastics or waste plastics comprises the following steps:
(1) crushing treatment:
crushing recycled plastics or waste plastics into granular, blocky or flaky samples with the size of more than 5 mm;
(2) screening treatment:
screening the sample obtained in the step (1) by using a 5mm sieve, and taking the sample with the size larger than 5mm as an analysis sample;
(3) cleaning and drying:
cleaning and drying the analysis sample obtained in the step (2);
(4) extraction treatment:
and (4) placing the sample obtained in the step (3) into an extraction reagent, extracting under different extraction conditions, screening out the sample with the size larger than 5mm by using a 5mm sieve, and removing the extraction reagent from the rest part.
And finally, detecting and analyzing the micro plastic obtained by extraction.
The extraction reagent in the step (4) is 95% ethanol solution.
The extraction conditions in the step (4) are as follows: extracting with shaking at 40 deg.C for 10 days.
Example 3
A method for extracting micro-plastic from recycled plastics or waste plastics comprises the following steps:
(1) crushing treatment:
crushing recycled plastics or waste plastics into granular, blocky or flaky samples with the size of more than 5 mm;
(2) screening treatment:
screening the sample obtained in the step (1) by using a 5mm sieve, and taking the sample with the size larger than 5mm as an analysis sample;
(3) cleaning and drying:
cleaning and drying the analysis sample obtained in the step (2);
(4) extraction treatment:
and (4) placing the sample obtained in the step (3) into an extraction reagent, extracting under different extraction conditions, screening out the sample with the size larger than 5mm by using a 5mm sieve, and removing the extraction reagent from the rest part.
And finally, detecting and analyzing the micro plastic obtained by extraction.
And (4) extracting the reagent isooctane.
The extraction conditions in the step (4) are any one of the following conditions: ultrasonic extracting at 40 deg.C for 2 hr.
The method is simple to operate, has reliable results, and has important evaluation significance on the risk of the release of the micro-plastics in the regenerated plastics or the waste plastics.
Claims (3)
1. A method for extracting micro-plastic from recycled plastics or waste plastics is characterized by comprising the following steps:
(1) crushing treatment:
crushing recycled plastics or waste plastics into granular, blocky or flaky samples with the size of more than 5 mm;
(2) screening treatment:
screening the sample obtained in the step (1) by using a 5mm sieve, and taking the sample with the size larger than 5mm as an analysis sample;
(3) cleaning and drying:
cleaning and drying the analysis sample obtained in the step (2);
(4) extraction treatment:
and (4) placing the sample obtained in the step (3) into an extraction reagent, extracting under different extraction conditions, screening out the sample with the size larger than 5mm by using a 5mm sieve, and removing the extraction reagent from the rest part.
2. The method for extracting micro plastic from recycled plastic or waste plastic as claimed in claim 1, wherein the extraction reagent in step (4) is any one of water, saturated saline, 10% ethanol solution, 50% ethanol solution, 95% ethanol solution, n-hexane, and isooctane.
3. The method for extracting micro plastic from recycled plastic or waste plastic as claimed in claim 1, wherein the extraction conditions in step (4) are any one of the following conditions: extracting at 40 deg.C for 2h, extracting at 40 deg.C for 10d, extracting at 100 deg.C for 2h, extracting at 40 deg.C by shaking for 10d, and extracting at 40 deg.C by ultrasonic extraction for 2 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110183321.XA CN112985898A (en) | 2021-02-09 | 2021-02-09 | Method for extracting micro-plastic from recycled plastic or waste plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110183321.XA CN112985898A (en) | 2021-02-09 | 2021-02-09 | Method for extracting micro-plastic from recycled plastic or waste plastic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112985898A true CN112985898A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110183321.XA Pending CN112985898A (en) | 2021-02-09 | 2021-02-09 | Method for extracting micro-plastic from recycled plastic or waste plastic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960190A (en) * | 2021-09-27 | 2022-01-21 | 浙江工业大学 | Py-GC analysis method of polyethylene glycol terephthalate in soil |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106626142A (en) * | 2016-12-05 | 2017-05-10 | 中国科学院新疆生态与地理研究所 | Method for extracting residual microfilm particles from soil |
| CN107281813A (en) * | 2017-07-25 | 2017-10-24 | 河海大学 | The extraction element and its extracting method of micro- plastics in a kind of deposit |
| 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 |
| US20190322832A1 (en) * | 2018-04-19 | 2019-10-24 | Purdue Research Foundation | Method of converting plastic waste into useful stock |
| CN110530696A (en) * | 2019-09-17 | 2019-12-03 | 芜湖青弋环保科技有限责任公司 | A kind of micro- apparatus for separating plastic chips and screening technique for solid sample |
| CN110987578A (en) * | 2019-10-28 | 2020-04-10 | 天津理工大学 | Screening and extracting method for micro-plastics in vegetation cover soil |
| CN111337327A (en) * | 2020-03-26 | 2020-06-26 | 河北大学 | Method and equipment for extracting farmland soil micro-plastic |
| 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 |
-
2021
- 2021-02-09 CN CN202110183321.XA patent/CN112985898A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
| CN106626142A (en) * | 2016-12-05 | 2017-05-10 | 中国科学院新疆生态与地理研究所 | Method for extracting residual microfilm particles from soil |
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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 |
| US20190322832A1 (en) * | 2018-04-19 | 2019-10-24 | Purdue Research Foundation | Method of converting plastic waste into useful stock |
| 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 |
| CN110530696A (en) * | 2019-09-17 | 2019-12-03 | 芜湖青弋环保科技有限责任公司 | A kind of micro- apparatus for separating plastic chips and screening technique for solid sample |
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| CN111337327A (en) * | 2020-03-26 | 2020-06-26 | 河北大学 | Method and equipment for extracting farmland soil micro-plastic |
Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960190A (en) * | 2021-09-27 | 2022-01-21 | 浙江工业大学 | Py-GC analysis method of polyethylene glycol terephthalate in soil |
| CN113960190B (en) * | 2021-09-27 | 2023-09-05 | 浙江工业大学 | Py-GC analysis method for polyethylene terephthalate in soil |
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