Testing device for simulating microplastic-derived soluble organic matters in water environment

Abstract

The utility model relates to the technical field of plastic-derived soluble organic matters, in particular to a testing device for simulating micro-plastic-derived soluble organic matters in a water environment. A first cabin and a second cabin of the test device are separated by a partition plate. The test container is configured to contain a microplastic sample and water, and is sealed with a sealing structure. The first simulation assembly is arranged in the first cabin and comprises a first support and an ultraviolet light source. The ultraviolet light source is installed on the first support. The first simulation assembly is configured to use the first support to bear a plurality of test containers and enable the plurality of test containers to be annularly arranged around the ultraviolet light source. The second simulation assembly is arranged in the second cabin. The second simulation assembly comprises a second support. The second simulation assembly is configured to carry a plurality of test vessels with a second bracket. The test device for simulating the micro-plastic derived soluble organic matters in the water environment provides basic information for evaluating environmental behaviors of micro-plastic in a natural water environment.

Description

Technical Field

[0001] This utility model relates to the field of plastic-derived soluble organic matter technology, and specifically to a test device for simulating microplastic-derived soluble organic matter in an aquatic environment. Background Technology

[0002] Microplastics, typically referring to plastic fragments or particles with a diameter of less than 5 millimeters, have become a novel environmental pollutant, and their environmental behavior and ecological effects have become a research hotspot in recent years. Microplastics have been detected in groundwater, rivers, nearshore seas, and even the polar oceans, as well as in various terrestrial and aquatic organisms. Under natural conditions, the significant impact of microplastic aging processes on the biogeochemical environment has attracted widespread attention.

[0003] When microplastics enter the aquatic environment, they can release large amounts of dissolved organic matter, known as microplastic derivatives. In the aquatic environment, microplastic-derived dissolved organic matter participates in biogeochemical processes, including interactions with organisms, minerals, and environmental pollutants, thereby causing environmental damage. Therefore, understanding the process of microplastics releasing dissolved organic matter in the aquatic environment under laboratory conditions is particularly important; however, current technologies lack experimental equipment to simulate microplastic-derived dissolved organic matter in aquatic environments. Summary of the Invention

[0004] In view of the above-mentioned technical problems, this utility model proposes a test device for simulating microplastic-derived dissolved organic matter in an aquatic environment, comprising a first chamber, a second chamber, a first simulation component, a second simulation component, and a test container;

[0005] The first compartment and the second compartment are separated by a partition;

[0006] The test container is configured to contain microplastic samples and water, and is sealed using a sealing structure;

[0007] The first simulation component is installed in the first chamber. The first simulation component includes a first support and an ultraviolet light source. The ultraviolet light source is installed on the first support. The first simulation component is configured to use the first support to support multiple test containers, and the multiple test containers are arranged in a ring around the ultraviolet light source.

[0008] The second simulation component is installed in the second chamber. The second simulation component includes a second support. The second simulation component is configured to support multiple test containers using the second support to simulate the situation of microplastic-derived dissolved organic matter in the absence of ultraviolet light source.

[0009] Preferably, both the first and second supports are equipped with magnetic stirring devices. The magnetic stirring device includes a drive base and a stirring rotor. The stirring rotor is arranged inside the test container. The magnetic stirring device is configured to use the drive base to drive the stirring rotor to rotate inside the test container by magnetic force, so that the microplastic sample in the test container is mixed with the water phase.

[0010] Preferably, the drive base is provided with a groove for the bottom of the test container to be inserted.

[0011] Preferably, the ultraviolet light source is mounted on the first bracket via a tube clamp.

[0012] Preferably, the first support includes a support base, a column, and a chuck. The column is vertically mounted on the support base, the ultraviolet light source is arranged parallel to the column, and the chuck is suspended above the support base. An irradiation area is formed between the chuck and the support base. The chuck is provided with a through slot and a slot. The chuck is configured to allow the ultraviolet light source to extend into the irradiation area through the through slot and to facilitate the clamping of the side wall of the test container by the slot.

[0013] Preferably, multiple slots are arranged in a ring around the through slot.

[0014] Preferably, the second support and the first support adopt the same structure.

[0015] Preferably, the sealing structure includes a cover and aluminum foil, with the cover fitting over the opening of the test container and the aluminum foil covering the outside of the cover.

[0016] Compared with the prior art, the experimental device for simulating microplastic-derived dissolved organic matter in aquatic environments provided by this utility model has the following substantial features and advancements: The experimental device for simulating microplastic-derived dissolved organic matter in aquatic environments is provided with a first chamber and a second chamber, each with different simulation components (the first simulation component has an ultraviolet light source, while the second simulation component only has a second support). This allows the device to simulate at least two different environmental conditions. For example, the first chamber can simulate an aquatic environment with ultraviolet light, while the second chamber can simulate an aquatic environment without ultraviolet light. This allows for a more comprehensive study of the effects of different environmental factors on microplastic-derived dissolved organic matter. Furthermore, the two sets of simulation components can serve as a control, improving the scientific rigor and comprehensiveness of the experiment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a test device for simulating microplastic-derived dissolved organic matter in an aquatic environment, according to an embodiment of this utility model.

[0018] Figure 2 This is a schematic diagram of the assembly structure of the first simulated component in an embodiment of this utility model.

[0019] Figure 3 yes Figure 2 A three-dimensional structural diagram of the first simulation component from another perspective.

[0020] Figure 4 yes Figure 2 The main view.

[0021] Figure 5 This invention describes the dissolution of organic matter by microplastic derivatives at different times.

[0022] Reference numerals: 1. First compartment; 2. Second compartment; 3. Partition; 4. Test container; 5. First support; 6. Ultraviolet light source; 7. Second support; 8. Magnetic stirring device; 9. Pipe clamp; 10. Sealing structure; 51. Support base; 52. Column; 53. Chuck; 81. Drive base; 82. Groove; 531. Through groove; 532. Slot. Detailed Implementation

[0023] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] This invention presents an experimental device for simulating microplastic-derived dissolved organic matter in an aquatic environment. The device aims to provide a basis for evaluating the environmental behavior of microplastics in natural aquatic environments by studying the process of microplastics generating dissolved organic matter in the aquatic environment.

[0025] like Figure 1 As shown, a test apparatus for simulating microplastic-derived dissolved organic matter in an aquatic environment includes a first chamber 1, a second chamber 2, a first simulation component, a second simulation component, and a test container 4. The first chamber 1 and the second chamber 2 are separated by a partition 3. Figure 2 As shown, the test container 4 is configured to contain microplastic samples and water, and is sealed using the sealing structure 10.

[0026] like Figure 1 As shown, the first simulation component is located inside the first chamber 1. The first simulation component includes a first support 5 and an ultraviolet light source 6. The ultraviolet light source 6 is mounted on the first support 5. The first simulation component is configured to support multiple test containers 4 using the first support 5, such that the multiple test containers 4 are arranged in a ring around the ultraviolet light source 6.

[0027] like Figure 1 As shown, the second simulation component is located within the second compartment 2. The second simulation component includes a second support 7. The second simulation component is configured to support multiple test containers 4 using the second support 7.

[0028] The first simulation component is configured to support multiple test containers 4 using a first support 5, with the containers 4 arranged in a ring around the ultraviolet light source 6. The second simulation component can also support multiple test containers 4. This allows for simultaneous testing of multiple samples, significantly improving experimental efficiency, saving time and resources, and enabling the acquisition of more experimental data in a shorter time. Furthermore, by setting the ultraviolet light source 6, key factors in the experimental environment can be precisely controlled, allowing for a more accurate simulation of the environmental conditions faced by microplastics in real water environments. This results in experimental results that are closer to reality, improving the reliability and accuracy of the results.

[0029] like Figure 2 As shown, the first support 5 includes a support base 51, a column 52, and a chuck 53. The column 52 is vertically mounted on the support base 51. The ultraviolet light source 6 is arranged parallel to the column 52. The chuck 53 is suspended above the support base 51. An irradiation area is formed between the chuck 53 and the support base 51. The vertical arrangement of the column 52 creates conditions for the ultraviolet light source 6 to be arranged parallel to it, allowing the ultraviolet light source 6 to irradiate the test container 4 at a relatively ideal angle, ensuring the uniformity and stability of the light, and improving the accuracy of the simulated lighting environment.

[0030] like Figure 3 As shown, the chuck 53 is provided with a through groove 531 and a slot 532. The chuck 53 is configured such that the ultraviolet light source 6 can extend into the irradiation area via the through groove 531, and the slot 532 facilitates clamping against the side wall of the test container 4. The through groove 531 avoids potential obstruction between the light source and the chuck 53, ensuring that the light can irradiate the test container 4 without obstruction. This makes the illumination of the microplastic sample in the water environment more closely resemble the ultraviolet irradiation under natural conditions, thereby improving the reliability of the test results.

[0031] like Figure 3 As shown, multiple slots 532 are arranged in a ring around the through slot 531. This arrangement ensures that each test container 4 is approximately equidistant from the central ultraviolet light source 6, resulting in consistent light intensity and duration received by each test container 4, effectively avoiding differences in illumination caused by varying distances from the light source. In experiments simulating the effects of ultraviolet light on microplastics in a simulated aquatic environment, uniform illumination distribution creates a more consistent lighting environment for all test samples, significantly improving the accuracy and comparability of test results.

[0032] For example, when studying the changes in dissolved organic matter derived from different types of microplastics under the same light conditions, the microplastics in each test container 4 can react under uniform light, and the data obtained can more realistically reflect the influence of the microplastics' own characteristics on the reaction results, avoiding errors caused by uneven light.

[0033] According to some preferred embodiments of the present invention, the second support 7 and the first support 5 adopt the same structure.

[0034] like Figure 3 Combination Figure 4 As shown, magnetic stirring devices 8 are provided on both the first support 5 and the second support 7. The magnetic stirring device 8 includes a drive base 81 and a stirring rotor. The stirring rotor is disposed inside the test container 4. The magnetic stirring device 8 is configured to use the drive base 81 to drive the stirring rotor to rotate inside the test container 4 by magnetic force, so that the microplastic sample inside the test container 4 is mixed with the aqueous phase.

[0035] The magnetic stirring devices 8 on the first support 5 and the second support 7 drive the stirring rotor to rotate inside the test container 4 via the drive base 81, effectively simulating the water mixing effect. The continuous rotation of the stirring rotor causes the water inside the test container 4 to flow, keeping the microplastic sample in a dynamic suspended state, just like it is constantly rolling and mixing with the water flow in a real natural water body. This provides a more realistic simulation environment for studying various reactions of microplastics under natural conditions, thus making the experimental results more practically instructive.

[0036] Furthermore, the rotation of the stirring rotor significantly accelerates the mixing speed of microplastic samples with water, increasing the contact area and frequency between the two. Substances on the surface of the microplastics dissolve more easily in the water under the influence of the water flow, while various components in the water react more fully with the microplastics. For example, in studying the process of microplastics releasing dissolved organic matter in water, stirring can accelerate this release rate, shorten the experimental cycle, and improve research efficiency.

[0037] like Figure 3 As shown, the drive base 81 is provided with a groove 82 for the bottom of the test container 4 to be embedded. The groove 82 ensures that the bottom of the test container 4 fits tightly against the drive base 81, shortening the distance between the drive base 81 and the stirring rotor. Magnetic force is transmitted over a shorter distance, reducing magnetic loss and thus driving the stirring rotor to rotate more efficiently.

[0038] like Figure 4 As shown, the ultraviolet light source 6 is mounted on the first support 5 via a clamp 9. The clamp 9 provides flexibility in its mounting method, allowing researchers to easily adjust the position and angle of the ultraviolet light source 6 on the first support 5 according to experimental needs. Before the experiment begins, the position of the light source can be easily calibrated to ensure that the emitted light can uniformly and accurately illuminate each experimental container 4.

[0039] like Figure 4As shown, the sealing structure 10 includes a lid and aluminum foil. The lid covers the opening of the test container 4. The aluminum foil covers the outside of the lid. The aluminum foil has good flexibility, can conform to the contour of the lid, fill any possible tiny gaps, and effectively prevent gas molecules from entering or leaving.

[0040] In this embodiment of the invention, a test apparatus for simulating microplastic-derived dissolved organic matter in an aquatic environment is used. The test container is a quartz test tube, and the microplastic sample is polypropylene with a particle size of 50µm. The specific test steps are as follows:

[0041] Twelve 0.25g samples of microplastic were weighed and placed into twelve quartz test tubes containing 50mL of ultrapure water. The test tubes were then sealed with aluminum foil. Three samples from each test tube were taken as parallel samples. The twelve quartz tubes were placed on the first support in the first chamber. The stirring rotor was set to 250rpm, and an 800W mercury lamp was used as the ultraviolet light source for irradiation. The sample temperature was maintained at approximately 25℃, and irradiation was performed for 12 hours per day.

[0042] Meanwhile, 12 control experimental groups were set up and placed in the second chamber for reaction. Compared with the experimental conditions in the first chamber, the experimental conditions in the second chamber were the same except that an 800W mercury lamp was not used as an ultraviolet light source.

[0043] After the reaction was completed on days 2, 4, 8, and 14, three quartz test tubes were taken out from both the first and second chambers. The solution containing microplastics was then vacuum filtered to obtain the aged microplastics and the post-reaction solution. The concentration of dissolved organic matter in the post-reaction solution was then tested.

[0044] The concentration of dissolved organic matter (DOC), i.e. microplastic-derived dissolved organic matter, in solutions taken from the first and second chambers at different reaction times was measured using a total organic carbon analyzer. The curves of the change of microplastic-derived dissolved organic matter (DOC) with reaction time under light and dark conditions were obtained.

[0045] This utility model is not limited to the specific technical solutions described in the above embodiments. Besides the above embodiments, this utility model may have other implementation methods. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A test device for simulating microplastic-derived dissolved organic matter in an aqueous environment, characterized by, The first chamber (1), the second chamber (2), the first simulation assembly, the second simulation assembly and the test container (4); The first chamber (1) and the second chamber (2) are separated by a partition (3); The test container (4) is configured to contain a microplastic sample and water, and is sealed by a sealing structure (10); The first simulation assembly is arranged in the first chamber (1), and comprises a first support (5) and an ultraviolet light source (6) mounted on the first support (5), the first simulation assembly is configured to carry a plurality of test containers (4) by the first support (5) and arrange the plurality of test containers (4) in a ring around the ultraviolet light source (6); The second simulation assembly is arranged in the second chamber (2), and comprises a second support (7), the second simulation assembly is configured to carry a plurality of test containers (4) by the second support (7).

2. The test device for simulating microplastic-derived dissolved organic matter in an aqueous environment according to claim 1, characterized in that, The first support (5) and the second support (7) are provided with a magnetic stirring device (8), the magnetic stirring device (8) comprises a driving base (81) and a stirring rotor, the stirring rotor is arranged in the test container (4), the magnetic stirring device (8) is configured to drive the stirring rotor to rotate in the test container (4) by the driving base (81) through magnetic force, so that the microplastic sample in the test container (4) is mixed with water.

3. The test device for simulating microplastic-derived dissolved organic matter in an aqueous environment according to claim 2, characterized in that, The driving base (81) is provided with a groove (82) for embedding the bottom of the test container (4). 4.The test device for simulating microplastic-derived dissolved organic matter in an aqueous environment according to claim 1, characterized in that, The ultraviolet light source (6) is mounted on the first support (5) by a pipe clamp (9).

5. The test device for simulating microplastic-derived dissolved organic matter in an aqueous environment according to claim 1, characterized in that, The first support (5) comprises a support seat (51), a column (52) and a chuck (53), the column (52) is vertically mounted on the support seat (51), the ultraviolet light source (6) is arranged parallel to the column (52), the chuck (53) is cantilevered above the support seat (51), an irradiation area is formed between the chuck (53) and the support seat (51), the chuck (53) is provided with a through slot (531) and a clamping slot (532), the chuck (53) is configured to allow the ultraviolet light source (6) to extend into the irradiation area through the through slot (531), and the clamping slot (532) is used to clamp the sidewall of the test container (4).

6. The test device for simulating microplastic-derived dissolved organic matter in an aqueous environment according to claim 5, characterized in that, A plurality of clamping slots (532) are arranged in a ring around the through slot (531).

7. The test device for simulating microplastic-derived dissolved organic matter in an aqueous environment according to claim 5, characterized in that, The second support (7) and the first support (5) have the same structure. 8.The device for testing microplastics-derived dissolved organic matter in simulated water environment according to claim 1, characterized in that, The sealing structure (10) comprises a cover and a tin foil, the cover covers the opening of the test container (4), and the tin foil covers the outside of the cover.

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