WO2023127254A1 - 容器、精製装置 - Google Patents

容器、精製装置 Download PDF

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Publication number
WO2023127254A1
WO2023127254A1 PCT/JP2022/039626 JP2022039626W WO2023127254A1 WO 2023127254 A1 WO2023127254 A1 WO 2023127254A1 JP 2022039626 W JP2022039626 W JP 2022039626W WO 2023127254 A1 WO2023127254 A1 WO 2023127254A1
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WO
WIPO (PCT)
Prior art keywords
container
liquid
port
mixed sample
discharge port
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/039626
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English (en)
French (fr)
Japanese (ja)
Inventor
将晶 寺田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Original Assignee
Shimadzu Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimadzu Corp filed Critical Shimadzu Corp
Priority to CN202280079360.8A priority Critical patent/CN118338969A/zh
Priority to JP2023570673A priority patent/JP7722470B2/ja
Priority to EP22915488.5A priority patent/EP4458471A4/en
Priority to US18/715,233 priority patent/US20250026672A1/en
Publication of WO2023127254A1 publication Critical patent/WO2023127254A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • 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
    • G01N1/40—Concentrating samples
    • G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
    • 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
    • B03B5/36—Devices therefor, other than using centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • 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
    • 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
    • G01N1/40—Concentrating samples
    • G01N1/4022—Concentrating samples by thermal techniques; Phase changes
    • 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
    • G01N1/40—Concentrating samples
    • G01N1/4044—Concentrating samples by chemical techniques; Digestion; Chemical decomposition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0084—Enhancing liquid-particle separation using the flotation principle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2433—Discharge mechanisms for floating particles
    • 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
    • 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
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0217—Mechanical separating techniques; devices therefor
    • B29B2017/0224—Screens, sieves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0217—Mechanical separating techniques; devices therefor
    • B29B2017/0237—Mechanical separating techniques; devices therefor using density difference
    • B29B2017/0244—Mechanical separating techniques; devices therefor using density difference in liquids
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • 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
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination
    • 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
    • G01N1/40—Concentrating samples
    • G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
    • G01N2001/4088—Concentrating samples by other techniques involving separation of suspended solids filtration

Definitions

  • the present disclosure relates to a container and a purification device for purifying a sample.
  • Non-Patent Document 1 discloses a method for purifying and recovering microplastics from aqueous deposits.
  • Non-Patent Document 1 describes that a heavy liquid is introduced from a pipe connected to the bottom of a container in order to collect microplastics.
  • an inlet pipe and an outlet pipe can be connected to the container used in the refiner.
  • the present disclosure has been made to solve the above-mentioned problems, and the object thereof is a container used in a purification apparatus for purifying a sample, and confirming the introduction pipe and the discharge pipe. It is to provide a container that simplifies.
  • a container according to an aspect of the present disclosure is used in a purification device for purifying a specific sample from a mixed sample, accommodates the mixed sample, and has a shape extending in the axial direction.
  • the container has an introduction port for introducing a decomposing liquid for treating contaminants contained in the mixed sample, a heavy liquid for separating the mixed sample by specific gravity difference, or a rinsing liquid for washing the container, and a waste liquid.
  • a first discharge port for discharging from the container.
  • the introduction port and the first discharge port are arranged at positions biased toward one end of the outer peripheral surface of the container when the container is viewed from the axial direction.
  • the introduction port and the first discharge port are biased toward one end of the outer peripheral surface of the container, the introduction of Since the states of both the port and the first discharge port can be confirmed at a glance, the work of confirming the introduction port and the first discharge port can be simplified.
  • FIG. 1 is a first diagram for explaining the arrangement of introduction ports and discharge ports according to the present embodiment
  • FIG. 2 is a second diagram for explaining the arrangement of the introduction port and the discharge port according to the embodiment
  • FIG. 10 is a first diagram for explaining the arrangement of introduction ports and discharge ports according to a modification
  • Fig. 2 is a second diagram for explaining the arrangement of the introduction port and the discharge port according to the modification;
  • FIG. 1 is a diagram schematically showing a refiner 1 according to this embodiment.
  • FIG. 2 is a diagram showing the configuration of refiner 100 according to the present embodiment.
  • the refiner 1 includes a refiner 100 for purifying a target substance from a mixed sample, and a controller 500. Controller 500 controls refiner 100 .
  • the refiner 100 is controlled by the controller 500 to refine and recover the target substance from the mixed sample.
  • “Purification” includes removing a substance of interest from a mixed sample.
  • "extracting a target substance from a mixed sample” may be simply referred to as “purifying the sample”.
  • the “mixed sample” may be any one as long as it contains the target substance to be collected.
  • “mixed samples” include seawater and sand collected from the sea or coast, processed products such as foods and cosmetics, and the like.
  • the “mixed sample” is exemplified by seawater and sand collected from the sea or coast.
  • target substance to be recovered by the refining device 1 may be any substance as long as it is recovered by the refining device 1 .
  • target substances include microplastics, which are fine plastic particles having a size of 5 mm or less.
  • microplastics contained in seawater and sand collected from the sea or coast are exemplified as target substances.
  • a microplastic, which is a target substance is an example of a “specific sample” in the present disclosure.
  • the purifier 100 includes a container 50 containing a mixed sample, pipes 11 to 23, pumps 31 to 33, electromagnetic valves 41 to 43, introduction ports 1F and 2F, discharge ports 1E, 2E, stirrer 71, stirrer 72, discharge pipe 80, decomposition liquid reservoir 110, heavy liquid reservoir 120, rinse liquid reservoir 130, waste liquid reservoirs 140, 150, filter 210, A supernatant liquid reservoir 215 and a case 300 are provided.
  • refiner 100 in the present embodiment has two introduction ports 1F and 2F as introduction ports, the number of introduction ports may be only one. Further, the refiner 100 has two discharge ports 1E and 2E as discharge ports, but may have only one discharge port.
  • Case 300 covers the periphery of the container 50 .
  • Case 300 in this embodiment includes case 300B arranged on the back surface of container 50 , case 300R arranged on the right side of container 50 , and case 300L arranged on the left side of container 50 .
  • Case 300 is an example of a “wall portion” in the present disclosure.
  • the vertical direction when the container 50 is installed is called "Z-axis direction".
  • the direction in which the case 300B extends when the case 300B is viewed from the positive side of the Z-axis direction is referred to as the "X-axis direction.”
  • the direction in which the case 300L or the case 300R extends is referred to as the "Y-axis direction.”
  • Each of the X-axis direction and the Y-axis direction is a direction perpendicular to the Z-axis direction.
  • the positive direction of the Z-axis is sometimes called “upper” and the negative direction of the Z-axis is called “lower”, the positive direction of the X-axis is called “right”, and the negative direction of the X-axis is called “left”.
  • the positive direction of the Y-axis is sometimes called the “front side”, and the negative direction of the Y-axis is sometimes called the “back side”.
  • the case 300 may include an upper case that covers the upper surface of the container. As shown in FIG. 2, the case 300B is formed with passage holes 310, 320, 330 for arranging the pumps 31, 32, 33, respectively.
  • the container 50 includes a first member 51 and a second member 52 located above the first member 51 .
  • the container 50 can be separated into a first member 51 and a second member 52 .
  • the user accommodates the mixed sample inside the first member 51 by removing the second member 52 from the first member 51 .
  • the first member 51 and the second member 52 are fixed in a connected state by a fixture (not shown) or the like.
  • the container 50 has a shape extending in the Z-axis direction. More specifically, the first member 51 of the container 50 has a cylindrical shape with a circular bottom surface. Since the first member 51 of the container 50 has a columnar shape, the purification device 1 according to the present embodiment improves the efficiency of stirring the mixed sample contained in the container 50 . In other words, the cylindrical shape of the first member 51 of the container 50 facilitates uniform stirring of the mixed sample contained in the container 50 .
  • the bottom surface of the container 50 is not limited to a circular shape, and may have other shapes such as a polygonal shape or an elliptical shape.
  • the container 50 of this embodiment is made of glass.
  • the container 50 is transparent, and the user can visually recognize the mixed sample contained in the container 50 from the outside. Accordingly, in the container 50 according to the present embodiment, the user can externally confirm that the introduction ports 1F, 2F and the discharge ports 1E, 2E are clogged.
  • the pipe 11 connects the decomposition liquid reservoir 110 and the solenoid valve 41 .
  • a pipe 12 connects the electromagnetic valve 41 and the pump 31 .
  • a pipe 13 connects the pump 31 and the introduction port 2F.
  • the introduction port 2 ⁇ /b>F is provided on the outer peripheral portion of the container 50 .
  • the pipe 14 connects the heavy liquid reservoir 120 and the solenoid valve 42 .
  • a pipe 15 connects the electromagnetic valve 42 and the pump 32 .
  • a pipe 16 connects the pump 32 and the introduction port 1F.
  • the port 62 is provided on the outer peripheral portion of the container 50 .
  • the pipe 17 connects the rinse liquid reservoir 130 and the solenoid valve 41 . That is, the solenoid valve 41 is connected to the decomposing liquid reservoir 110 through the pipe 11 and is also connected to the rinse liquid reservoir 130 through the pipe 17 . Thus, the rinse liquid reservoir 130 and the introduction port 2F of the container 50 are connected by the pipes 17 , 12 , 13 via the solenoid valve 41 and the pump 31 .
  • the pipe 18 connects the rinse liquid reservoir 130 and the solenoid valve 42 . That is, the solenoid valve 42 is connected to the heavy liquid reservoir 120 by the pipe 14 and is also connected to the rinse liquid reservoir 130 by the pipe 18 . Thus, the rinse liquid reservoir 130 and the introduction port 1F of the container 50 are connected by the pipes 18, 15 and 16 via the electromagnetic valve 42 and the pump 32. As shown in FIG.
  • a pipe 19 connects the waste liquid reservoir 140 and the solenoid valve 43 .
  • a pipe 20 connects the electromagnetic valve 43 and the pump 33 .
  • a pipe 21 connects the pump 33 and the discharge port 1E.
  • the discharge port 1E is provided on the outer peripheral portion of the container 50. As shown in FIG. Thus, the waste liquid reservoir 140 and the discharge port 1E of the container 50 are connected by the pipes 19, 20, 21 via the solenoid valve 43 and the pump 33.
  • the pipe 22 connects the discharge port 2E and the port 64.
  • the discharge port 2 ⁇ /b>E is provided on the outer peripheral portion of the container 50 . That is, the pump 33 is connected to the discharge port 1E of the container 50 by the pipe 21 and is also connected to the discharge port 2E of the container 50 by the pipe 22 .
  • the waste liquid reservoir 140 and the discharge port 2E of the container 50 are connected by the pipes 19 , 20 , 22 via the electromagnetic valve 43 and the pump 33 .
  • a pipe 23 connects the waste liquid reservoir 150 and the solenoid valve 43 . That is, the solenoid valve 43 is connected to the waste liquid reservoir 140 by the pipe 19 and is also connected to the waste liquid reservoir 150 by the pipe 23 .
  • the waste liquid reservoir 150 and the discharge port 1E of the container 50 are connected by the pipes 23 , 20 , 21 via the electromagnetic valve 43 and the pump 33 .
  • the waste liquid reservoir 150 and the discharge port 2E of the container 50 are connected by pipes 23 , 20 and 22 via an electromagnetic valve 43 and a pump 33 .
  • the decomposition liquid reservoir 110 stores a decomposition liquid for treating contaminants.
  • Contaminants are foreign substances other than the target substance to be collected in the mixed sample.
  • the "impurities” are exemplified by organic impurities having organic properties.
  • the “decomposition liquid” may be anything as long as it decomposes contaminants.
  • the “decomposition liquid” decomposes organic contaminants.
  • the “decomposition liquid” includes an oxidizing agent such as hydrogen peroxide solution (H 2 O 2 ), a mixture of hydrogen peroxide solution (H 2 O 2 ) and iron oxide (II) (FeO).
  • the "organic contaminants” include wood chips and plankton mixed in the seawater or sand.
  • the heavy liquid reservoir 120 stores heavy liquid for separating the mixed sample due to the difference in specific gravity.
  • the “heavy liquid” may be any liquid as long as it separates the mixed sample due to the difference in specific gravity.
  • the “heavy liquid” sediments inorganic contaminants having inorganic properties due to the difference in specific gravity.
  • “heavy liquid” includes sodium chloride (NaCl), sodium iodide (Nal), zinc chloride (ZnCl 2 ), and the like.
  • “inorganic contaminants” include sand, glass, stone, and the like.
  • the specific gravity of the “heavy liquid” is set higher than the specific gravity of the target substance to be recovered by the refiner 1 and lower than the specific gravity of the “inorganic contaminants”.
  • the specific gravity of the “heavy liquid” is greater than the specific gravity of the microplastics.
  • the specific gravity may be set smaller than that of sand, glass, stone, and the like.
  • the specific gravity of the “heavy liquid” may be set to about 1.5 to about 1.7.
  • the rinse liquid reservoir 130 stores the rinse liquid for cleaning the inside of the container 50 .
  • the “rinse liquid” may be any liquid as long as it cleans the inside of the container 50 .
  • the “rinse liquid” includes water.
  • the “rinse liquid” has a role of cleaning the inside of the container 50 and a role of diluting the decomposition liquid introduced into the container 50 .
  • the waste liquid reservoirs 140 and 150 store the heavy liquid discharged from the container 50, the rinse liquid, and the waste liquid such as seawater contained in the mixed sample.
  • the pump 31 introduces the decomposition liquid in the decomposition liquid reservoir 110 or the rinse liquid in the rinse liquid reservoir 130 into the container 50 through the introduction port 2F.
  • the pump 32 introduces the heavy liquid in the heavy liquid reservoir 120 or the rinse liquid in the rinse liquid reservoir 130 into the container 50 through the introduction port 1F.
  • the pump 33 discharges the waste liquid in the container 50 to the waste liquid reservoir 140 or the waste liquid reservoir 150 through the discharge port 1E or the discharge port 2E under the control of the control device 500.
  • the electromagnetic valve 41 switches the reservoir connected to the introduction port 2F between the decomposition liquid reservoir 110 and the rinse liquid reservoir 130 under the control of the control device 500 .
  • the solenoid valve 42 switches the reservoir connected to the introduction port 1F between the heavy liquid reservoir 120 and the rinse liquid reservoir 130 under the control of the control device 500 .
  • the solenoid valve 43 is operated to open the path between the waste liquid reservoir 140 and the discharge ports 1E, 2E of the container 50 (the path via the pipes 19, 20, 21 or via the pipes 19, 20, 22). and a route between the waste liquid reservoir 150 and the discharge ports 1E, 2E of the container 50 (a route via the pipes 23, 20, 21 or a route via the pipes 23, 20, 22). Switch the path connected to 1E and 2E.
  • the introduction port 2F introduces the decomposition liquid in the decomposition liquid reservoir 110 sucked by the pump 31 or the rinse liquid in the rinse liquid reservoir 130 into the container 50 .
  • the introduction port 1 ⁇ /b>F introduces the heavy liquid in the heavy liquid reservoir 120 sucked by the pump 32 or the rinse liquid in the rinse liquid reservoir 130 into the container 50 .
  • the discharge ports 1 ⁇ /b>E and 2 ⁇ /b>E discharge the waste liquid in the container 50 sucked by the pump 33 to the waste liquid reservoir 140 or the waste liquid reservoir 150 .
  • a filter (not shown) is provided inside the introduction ports 1F, 2F and the discharge ports 1E, 2E so that the target substance contained in the mixed sample is not discharged from the container 50.
  • the filter is a mesh with meshes large enough to trap the microplastics to be collected.
  • the filter (mesh) is a wire mesh made of SUS (Steel Use Stainless) or a membrane filter made of PTFE (polytetrafluoroethylene) (Teflon (registered trademark)).
  • the mesh size of the filter (mesh) must be 0.1 to 5.0 mm, and preferably about 0.1 mm.
  • the introduction ports 1F, 2F and the discharge ports 1E, 2E may be collectively referred to as "each port”.
  • the stirrer 71 is, for example, a magnetic constant temperature stirrer and is arranged below the container 50 .
  • the stirrer 71 rotates the stirrer 72 provided inside the container 50 by generating magnetic force under the control of the control device 500 .
  • the stirrer 72 stirs the mixed sample in the container 50 by rotating or vibrating due to the magnetic force received from the stirrer 71 .
  • the stirrer 71 keeps the temperature of the mixed sample in the container 50 constant by applying heat to the container 50 from below under the control of the control device 500 .
  • the temperature of the stirrer 71 is set to about 60°C to about 70°C, and the liquid in the container 50 heated by the stirrer 71 according to the set temperature is kept at about 50°C.
  • the discharge pipe 80 is connected to the discharge port 55 provided at the top of the container 50, and discharges the supernatant liquid of the mixed sample overflowing from the container 50 to the outside.
  • the filter 210 filters the supernatant liquid of the mixed sample discharged from the discharge pipe 80 to collect the target substance to be collected contained in the supernatant liquid.
  • the supernatant that has passed through filter 210 is collected by supernatant reservoir 215 .
  • the filter 210 is a mesh having meshes large enough to trap the microplastics to be collected.
  • the filter 210 (mesh) is a wire mesh made of SUS or a membrane filter made of PTFE (registered trademark).
  • the mesh size (size) of the filter 210 must be 0.1 to 5.0 mm, and preferably about 0.1 mm. .
  • the control device 500 may be realized by a general-purpose computer, or may be realized by a dedicated computer for controlling the refiner 100. Controller 500 controls pumps 31 - 33 , solenoid valves 41 - 43 and stirrer 71 in purifier 100 .
  • control device 500 drives motors (not shown) by supplying power to the pumps 31 to 33 to open and close valves (not shown). As a result, the pumps 31 to 33 suck or discharge various liquids.
  • the control device 500 opens and closes the valves (not shown) by supplying power to the solenoid valves 41-43. As a result, the electromagnetic valves 41 to 43 switch paths through which various liquids pass.
  • the control device 500 drives a motor (not shown) to rotate the stirrer 72 in the container 50 using magnetic force. Further, the control device 500 drives a heater (not shown) by applying power to the stirrer 71 to apply constant heat to the container 50 .
  • FIG. 3 is a diagram for explaining the hardware configuration of the refining device 1 according to this embodiment.
  • the control device 500 includes, as main hardware elements, an arithmetic device 501, a memory 502, a communication device 503, a display device 504, an input device 505, a data reader 506, and a storage device. 510.
  • Arithmetic device 501 is a computer that reads programs (eg, control program 511 and OS (Operating System) 513) stored in storage 510, expands the read programs in memory 502, and executes them. For example, the arithmetic device 501 executes the control program 511 to perform a refining process (described later with reference to FIG. 4) for controlling the refining device 100 .
  • the arithmetic unit 501 is configured by, for example, a CPU (Central Processing Unit), an FPGA (Field Programmable Gate Array), a GPU (Graphics Processing Unit), or an MPU (Multi Processing Unit). Note that the arithmetic unit 501 may be configured by an arithmetic circuit (processing circuit).
  • the memory 502 provides a storage area for temporarily storing program codes, work memory, etc. when the arithmetic unit 501 executes an arbitrary program.
  • the memory 502 is composed of volatile memory such as DRAM (Dynamic Random Access Memory) or SRAM (Static Random Access Memory), or non-volatile memory such as ROM (Read Only Memory) or flash memory.
  • the communication device 503 transmits and receives data to and from other devices via a network (not shown).
  • the communication device 503 supports arbitrary communication methods such as Ethernet (registered trademark), wireless LAN (Local Area Network), and Bluetooth (registered trademark).
  • the display device 504 is composed of, for example, an LCD (Liquid Crystal Display) or the like, and displays a program design screen, an alert screen in the event of an abnormality, and the like.
  • LCD Liquid Crystal Display
  • the input device 505 is composed of, for example, a keyboard or a mouse, and is used by the user to input design information when designing a program.
  • Input device 505 may include a start switch for starting execution of the refinement process by computing device 501 .
  • the data reading device 506 reads data stored in the recording medium 507 .
  • the recording medium 507 may have other configurations, such as a CD (Compact Disc), a DVD (Digital Versatile Disc), or a USB (Universal Serial Bus) memory, as long as it can record various data. .
  • CD Compact Disc
  • DVD Digital Versatile Disc
  • USB Universal Serial Bus
  • the storage 510 provides a storage area for storing various data necessary for refining processing.
  • the storage 510 is composed of a non-volatile memory device such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive).
  • the storage 510 stores a control program 511 , control data 512 , and an OS (Operating System) 513 .
  • the control program 511 is a program in which the details of the refining process are described, and is executed by the computing device 501.
  • the control program 511 may be designed by the user using the input device 505, read from the recording medium 507 by the data reader 506, or read from another device such as a server by the communication device 503 via the network. may be obtained by
  • control data 512 is data used when the arithmetic device 501 executes the control program 511 .
  • control data 512 includes data such as set values for controlling pumps 31-33, solenoid valves 41-43, and stirrer 71.
  • FIG. The control data 512 may be input by the user using the input device 505, read from the recording medium 507 by the data reader 506, or read from another device such as a server via the network by the communication device 503. may be obtained via
  • the OS 513 provides basic functions for executing various types of processing by the computing device 501 .
  • FIG. 4 is a flow chart of the refining process executed by the refining device 1 according to this embodiment. Each step shown in FIG. 4 is implemented by the arithmetic device 501 of the control device 500 executing the OS 513 and the control program 511 .
  • S is used as an abbreviation for "STEP".
  • the user introduces the mixed sample into the container 50 of the refiner 1.
  • the user opens the container 50 by removing the first member from the second member and introduces the mixed sample into the interior of the container 50 .
  • the user then initiates control of the purifier 100 by the control device 500 by performing a start operation using the input device 505 of the control device 500 .
  • the control device 500 controls the pump 33 and the electromagnetic valve 43 to The waste liquid in the container 50 is discharged to the waste liquid reservoir 150 (S1). It should be noted that microplastics and the like contained in the mixed sample, which are to be collected, are not discharged to the outside by the filters provided inside the ports 63 and 64 and remain in the container 50 .
  • control device 500 stops the pump 33 on the discharge side and controls the pump 31 and the electromagnetic valve 41 so that the decomposition liquid in the decomposition liquid reservoir 110 is discharged via the pipes 11 to 13 and the port 61. 50 (S2).
  • the control device 500 controls the stirrer 71 to rotate the stirrer 72 provided inside the container 50 while applying constant heat to the container 50 to stir the mixed sample (S3).
  • the temperature of the container 50, the rotation speed of the stirrer 72, and the rotation time are preset by the user.
  • an oxidation treatment is performed by the oxidizing agent, and organic contaminants contained in the mixed sample are decomposed. It should be noted that while the mixed sample is not necessarily heated during stirring, the temperature of the mixed sample is maintained at a constant temperature by heating, thereby facilitating the decomposition due to the oxidation treatment.
  • control device 500 stops the pump 33 on the discharge side and controls the pump 31 and the electromagnetic valve 41 to supply the rinse liquid in the rinse liquid reservoir 130 via the pipes 17 , 12 , 13 and the port 61 . is introduced into the container 50 to wash the inside of the container 50 (S5). At this time, the control device 500 introduces an amount of rinse liquid preset by the user into the container 50 by controlling the suction amount of the pump 31 .
  • the controller 500 controls the pump 33 and the solenoid valve 43 to remove the waste liquid from the container 50 after the rinse liquid has been introduced into the waste liquid reservoir 150 via the pipes 20 to 23 and the ports 63 and 64. (S6).
  • the inside of the container 50 is washed with the rinsing liquid.
  • the control device 500 may dry the mixed sample by leaving the mixed sample as it is for a predetermined period (for example, one day).
  • control device 500 introduces the heavy liquid in the heavy liquid reservoir 120 into the container 50 via the pipes 14 to 16 and the port 62 by controlling the pump 32 and the electromagnetic valve 42 (S7). At this time, the control device 500 introduces an amount of heavy liquid preset by the user into the container 50 by controlling the suction amount of the pump 32 .
  • control device 500 leaves the mixed sample as it is for a predetermined period (for example, one day) (S8).
  • a predetermined period for example, one day
  • the control device 500 controls the pump 32 and the solenoid valve 42 again to introduce the heavy liquid in the heavy liquid reservoir 120 into the container 50 again via the pipes 14 to 16 and the port 62 (S9).
  • the control device 500 introduces an amount of heavy liquid preset by the user into the container 50 by controlling the suction amount of the pump 32 .
  • the heavy liquid is reintroduced into the mixed sample in the container 50 in this way, the liquid level of the mixed sample separated by specific gravity gradually rises in the container 50 , and the supernatant liquid of the mixed sample eventually drains from the container 50 . Exit 55 is reached. Then, the supernatant liquid of the mixed sample is discharged outside through the discharge port 55 and the discharge pipe 80 .
  • the supernatant liquid of the mixed sample discharged through the discharge pipe 80 is filtered by the filter 210 and only the waste liquid is recovered by the supernatant liquid reservoir 215 .
  • microplastics which are target substances with a lower specific gravity than the heavy liquid, remain.
  • the control device 500 cleans the container 50 as post-processing. Specifically, the controller 500 controls the pump 33 and the electromagnetic valve 43 to drain the waste liquid in the container 50 after the microplastics have been collected through the pipes 19 to 22 and the ports 63 and 64. It is discharged to the reservoir 140 (S10).
  • control device 500 stops the pump 33 on the discharge side and controls the pump 32 and the solenoid valve 42 to supply the rinse liquid in the rinse liquid reservoir 130 via the pipes 18 , 15 , 16 and the port 62 . is introduced into the container 50 to wash the inside of the container 50 (S11). At this time, the controller 500 introduces an amount of rinse liquid preset by the user into the container 50 by controlling the suction amount of the pump 32 .
  • the controller 500 controls the pump 33 and the solenoid valve 43 so that the waste liquid in the container 50 after the introduction of the rinse liquid is transferred to the waste liquid reservoir 140 through the pipes 19 to 22 and the ports 63 and 64. (S12). As a result, the inside of the container 50 is washed with the rinse liquid.
  • the control device 500 automatically controls the mixed sample contained in the container 50 to decompose with appropriate timing and for an appropriate period of time. and heavy liquid are introduced, and the waste liquid is discharged from the container 50 . Therefore, the user does not need to introduce the decomposing liquid and the heavy liquid into the container 50 and discharge the waste liquid from the container 50 by himself/herself. As a result, the user can purify the mixed sample with high accuracy without taking time and effort, and without the possibility that the microplastic collection accuracy varies depending on the user's skill.
  • control device 500 automatically cleans the used container 50 after collecting the microplastics. Therefore, the user does not need to wash the container 50 by himself.
  • the mixed sample is seawater, sand, or the like. Seawater, sand, etc. collected from nature may contain contaminants that may clog the inlet ports 1F, 2F and the outlet ports 1E, 2E. For example, if the mixed sample contains contaminants that are larger than the inner diameters of the introduction ports 1F, 2F and the discharge ports 1E, 2E, the contaminants may clog the connection between each port and the container. As a result, the flow of heavy liquid, decomposing liquid, rinse liquid, waste liquid, etc. may be blocked.
  • the refining device 1 automatically performs the refining process at appropriate timing and for an appropriate period of time by the control device 500 if no abnormality occurs in the refining device 1 . That is, the refinement process can be performed without requiring user operation or intervention for each process.
  • the refining device 1 cannot perform normal refining process. If the refining process proceeds while at least one of the inlet ports 1F, 2F and the exhaust ports 1E, 2E has an abnormality, the user automatically recognizes that the refining process is progressing normally. It takes a long time to realize what is happening.
  • the refining device 1 is configured so as to facilitate confirmation work for each port.
  • configurations of the introduction ports 1F, 2F and the discharge ports 1E, 2E in the refiner 1 according to the present embodiment will be described with reference to FIGS. 5 and 6.
  • the outer peripheral surface of the container 50 is a surface surrounding the axial direction of the container 50 . In the container 50 having a cylindrical shape, the side surface of the container 50 corresponds to the outer peripheral surface.
  • FIG. 5 is the first diagram for explaining the arrangement of the introduction ports 1F, 2F and the discharge ports 1E, 2E according to this embodiment.
  • FIG. 5 shows the container 50 and case 300 viewed from the negative side of the Z axis. Therefore, FIG. 5 shows a circular shape, which is the shape of the bottom surface of the first member 51 of the container 50 .
  • a case 300R that is part of the case 300 is arranged on the positive direction side of the X axis of the container 50 .
  • a case 300L that is part of the case 300 is arranged on the negative direction side of the X-axis of the container 50 .
  • a case 300B that is a part of the case 300 is arranged on the negative direction side of the Y-axis of the container 50 .
  • the case 300 is not arranged on the positive direction side of the Y-axis of the container 50 .
  • the case 300 is formed with an opening 300P on the positive side of the Y-axis of the container 50 .
  • the end portion P1 is the end portion of the outer peripheral surface of the container 50 when the container 50 is viewed from the negative direction side of the Z axis.
  • the end portion P1 is the end portion of the outer peripheral surface of the container 50 that is closest to the opening 300P.
  • the introduction ports 1F, 2F and the discharge ports 1E, 2E are arranged on the outer peripheral surface of the container 50 at positions biased toward the end P1.
  • the introduction ports 1F, 2F and the discharge ports 1E, 2E are arranged within the first region Rg1 of the outer peripheral surface of the container 50.
  • the first region Rg1 is one region when the region of the outer peripheral surface of the container 50 is divided into two with a line Ln1 passing through the center point CP1 in the shape of the bottom surface of the container 50 as a boundary.
  • the first region Rg1 is the region on the outer peripheral surface of the container 50 on the positive direction side of the Y axis.
  • the second region Rg2 is a region on the outer peripheral surface of the container 50 on the negative direction side of the Y axis.
  • the inlet ports 1F, 2F and the outlet ports 1E, 2E are arranged within a semicircle of the circular shape of the container 50 when viewed from the negative direction of the Z-axis.
  • the angle Ag1 between the line connecting the discharge port 1E and the center point CP1 and the line connecting the discharge port 2E and the center point CP1 is 120 degrees.
  • the angle Ag1 may be any angle as long as it is less than 180 degrees.
  • the container 50 used in the refiner 1 of the present embodiment all of the introduction ports 1F, 2F and the discharge ports 1E, 2E are biased toward the end P1 on the outer peripheral surface of the container 50.
  • all states of the introduction ports 1F, 2F and the discharge ports 1E, 2E can be visually recognized at once by simply looking at the container 50 from the side facing the end P1. That is, the user can confirm the state of each of the introduction ports 1F, 2F and the discharge ports 1E, 2E at a glance. Therefore, the container 50 used in the refining apparatus 1 of the present embodiment can facilitate confirmation work of the introduction ports 1F, 2F and the discharge ports 1E, 2E.
  • the introduction ports 1F, 2F and the discharge ports 1E, 2E are arranged along the outer peripheral surface of the container 50 from the negative direction side of the X axis. They are arranged in the order of the introduction port 2F and the discharge port 2E. In other words, the introduction ports 1F and 2F are arranged along the outer peripheral surface of the container 50 between the discharge port 1E and the discharge port 2E.
  • the container 50 can prevent the contaminants from accumulating in the non-clogged port.
  • the discharge port 1E and the discharge port 2E are continuously arranged on the outer peripheral surface of the container 50, and when the discharge port 1E is clogged, contaminants accumulate near the discharge port 1E due to the suction of the pump 33. do.
  • contaminants are also accumulated in the discharge port 2E arranged in the vicinity of the discharge port 1E, which may cause clogging in a chain reaction.
  • the discharge port 1E and the discharge port 2E are separated from each other, even if one of the discharge ports is clogged, the other discharge port is clogged in a chain reaction. can be suppressed.
  • FIG. 6 is a second diagram for explaining the arrangement of the introduction ports 1F, 2F and the discharge ports 1E, 2E according to this embodiment.
  • FIG. 6 shows the container 50 as viewed from the positive Y-axis side. That is, FIG. 6 shows the container 50 when the end portion P1 is viewed from the position of the opening 300P formed in the case 300.
  • the introduction ports 1F, 2F and the discharge ports 1E, 2E are arranged at positions facing the opening 300P. Therefore, in the container 50 according to the present embodiment, it is possible to easily check the introduction ports 1F, 2F and the discharge ports 1E, 2E only by looking at the introduction ports 1F, 2F and the discharge ports 1E, 2E from the opening 300P. can.
  • the height HE1 at which the discharge port 1E is connected to the container 50 is lower than the height HF1 at which the introduction port 1F is connected to the container 50.
  • the discharge port 1E is arranged on the negative direction side of the Z-axis of the introduction port 1F.
  • the discharge port 2E like the discharge port 1E, is connected to the container 50 at the height HE1.
  • the introduction port 2F is connected to the container 50 at the height HF1 in the same manner as the introduction port 1F.
  • the height HE1 at which the discharge ports 1E and 2E are arranged on the outer peripheral surface of the container 50 is the height at which the introduction ports 1F and 2F are arranged on the outer peripheral surface of the container 50. It is a position different from HF1. This makes it possible for the user to recognize whether the port is an introduction port or an exhaust port based on the difference in height at which the ports are arranged, thereby preventing piping from being connected to the wrong port. can. Furthermore, the height HE1 at which the discharge ports 1E and 2E are arranged is lower than the height HF1 at which the introduction ports 1F and 2F are arranged, so that the waste liquid in the container 50 can be discharged smoothly. That is, since the discharge ports 1E and 2E are arranged near the bottom surface, the waste liquid in the container 50 is easily guided to the discharge ports 1E and 2E.
  • FIG. 7 is the first diagram for explaining the arrangement of introduction ports 1F, 2F and discharge ports 1E, 2E according to the modification.
  • FIG. 7 shows a modified container 50 and case 300 viewed from the negative side of the Z axis.
  • the bottom surface of the modified container 50 has a square shape. That is, the container 50 of the modified example has a quadrangular prism shape with the Z-axis as its axial direction.
  • the container 50 used in the refining apparatus 1 of the modification has the introduction ports 1F, 2F and the discharge ports 1E, 2E at positions biased toward the end P1 on the outer peripheral surface of the container 50. are placed. More specifically, each of the introduction ports 1F, 2F and the discharge ports 1E, 2E is arranged on the surface Sf1 facing the opening 300P on the side surface of the rectangular prism shape.
  • the container 50 used in the refiner 1 of the modified example can simplify the confirmation work of the introduction ports 1F, 2F and the discharge ports 1E, 2E.
  • FIG. 8 is a second diagram for explaining the arrangement of introduction ports 1F, 2F and discharge ports 1E, 2E according to the modification.
  • FIG. 8 shows the container 50 as viewed from the positive Y-axis side.
  • the height HE1 at which the discharge ports 1E and 2E are arranged on the outer peripheral surface of the container 50 is equal to the height HE1 at which the introduction ports 1F and 2F are arranged on the outer peripheral surface of the container 50.
  • height HF1 and low position As a result, even in the modified example, it is possible for the user to recognize whether it is an introduction port or an exhaust port, depending on the difference in the height at which the ports are arranged. can be suppressed.
  • the discharge ports 1E and 2E are arranged near the bottom surface, the waste liquid in the container 50 is easily guided to the discharge ports 1E and 2E.
  • a container is a container that is used in a purification device that purifies a specific sample from a mixed sample, stores the mixed sample, and has a shape extending in the axial direction.
  • the container has an introduction port for introducing a decomposing liquid for treating contaminants contained in the mixed sample, a heavy liquid for separating the mixed sample by specific gravity difference, or a rinsing liquid for washing the container, and a waste liquid.
  • a first discharge port for discharging from the container.
  • the introduction port and the first discharge port are arranged at positions biased toward one end of the outer peripheral surface of the container when the container is viewed from the axial direction.
  • the outer peripheral surface includes a first region and a second region bounded by a line passing through the center point of the shape of the cross section in the axial direction of the container.
  • An inlet port and a first outlet port are located in the first region.
  • a second discharge port for discharging the waste liquid from the container is further provided.
  • An inlet port is disposed along the outer peripheral surface between the first and second exhaust ports.
  • the container has a cylindrical shape. According to the container of item 5, the efficiency of the stirring process of the mixed sample contained in the container is improved.
  • a purification device is a purification device for purifying a mixed sample.
  • the refining device includes a container for separating a mixed sample based on a specific gravity difference using a heavy liquid, a decomposing liquid reservoir that holds the decomposing liquid, a heavy liquid reservoir that holds the heavy liquid, and a rinse liquid reservoir that holds the rinsing liquid.
  • the container has a shape extending in the axial direction, and contains a decomposing liquid for treating contaminants contained in the mixed sample, a heavy liquid for separating the mixed sample based on the difference in specific gravity, or a rinsing liquid for washing the container. and a first discharge port for discharging the waste liquid from the container, wherein the introduction port and the first discharge port are located on the outer peripheral surface of the container when the container is viewed from the axial direction. is arranged at a position biased to one end of the
  • (Section 7) further includes a wall covering the periphery of the container. An opening is formed in the wall, and the introduction port and the first discharge port are arranged at positions facing the opening.
  • 1 refining device 1E, 2E discharge port, 1F, 2F introduction port, 11 to 23 piping, 31 to 33 pump, 41 to 43 solenoid valve, 50 container, 51 first member, 52 second member, 55 outlet , 61 to 64 Port, 71 Stirrer, 72 Stirrer, 80 Discharge pipe, 100 Refiner, 110 Decomposed liquid reservoir, 120 Heavy liquid reservoir, 130 Rinse liquid reservoir, 140, 150 Waste liquid reservoir, 210 Filter, 215 Supernatant liquid reservoir, 300 case, 300P opening, 310, 320, 330 passage hole, 500 control device, 501 arithmetic device, 502 memory, 503 communication device, 504 display device, 505 input device, 506 data reader, 507 recording medium, 510 storage, 511 Control program, 512 control data, Ag1 angle, CP1 center point, HE1, HF1 height, Ln1 line, P1 end, Rg1 first area, Rg2 second area, Sf1 surface.

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PCT/JP2022/039626 2021-12-27 2022-10-25 容器、精製装置 Ceased WO2023127254A1 (ja)

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CN202280079360.8A CN118338969A (zh) 2021-12-27 2022-10-25 容器、纯化装置
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EP22915488.5A EP4458471A4 (en) 2021-12-27 2022-10-25 CONTAINER AND PURIFICATION DEVICE
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JP2003251102A (ja) * 2002-03-07 2003-09-09 Fumihiko Nakano 油水分離回収装置
CN210279470U (zh) * 2019-06-03 2020-04-10 罗平金丰油脂有限公司 一种菜籽清选机用除杂装置

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EP3720610B1 (en) * 2017-12-09 2025-04-23 Opec Remediation Technologies Pty Limited Method for separation of a substance from water
CN110773331B (zh) * 2019-09-30 2022-02-01 河南大学 一种分离环境土壤及沉积物中微塑料的富集装置
CN214234466U (zh) * 2020-11-24 2021-09-21 青岛浩海仪器有限公司 沉降物中微塑料分离装置
CN112845522B (zh) * 2020-12-31 2024-01-05 华南理工大学 一种沉积物中微塑料高效分离及吸附污染物部分解吸的一体化装置及其使用方法
CN113686734B (zh) * 2021-08-17 2022-09-06 江南大学 用于模拟微塑料迁移和目标物提取的一体式装置及方法

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JP2003251102A (ja) * 2002-03-07 2003-09-09 Fumihiko Nakano 油水分離回収装置
CN210279470U (zh) * 2019-06-03 2020-04-10 罗平金丰油脂有限公司 一种菜籽清选机用除杂装置

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Title
A NOVEL, HIGHLY EFFICIENT METHOD FOR THE SEPARATION AND QUANTIFICATION OF PLASTIC PARTICLES IN SEDIMENTS OF AQUATIC ENVIRONMENTS, 10 December 2021 (2021-12-10)

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