Adsorption sampling device for water pollutants

Abstract

The utility model discloses an adsorption sampling device for water pollutants. The adsorption sampling device comprises a collector and a filling consumable, the collector comprises a barrel body formed by a heavy ceramic material; an annular interlayer is arranged on the cross section of a barrel body of the barrel, the top face of the annular interlayer is closed, and the bottom face of the annular interlayer is open. Sampling windows are formed in the outer cylinder wall and the inner cylinder wall of the cylinder body; the filling consumable comprises a receiving phase, the receiving phase is uniformly formed between the two layers of semi-permeable membranes, and the sampling structure is integrally formed into an annular sheet matched with the annular interlayer, is inserted into the annular interlayer and is attached to the inner wall of the annular interlayer; the annular sheet and the sealing plug are integrally formed on the top face, and the sealing plug is of an annular structure matched with the annular interlayer and can be covered and sealed on the open side of the bottom face of the annular interlayer. The water body organic pollutant sampling device is simple in structure, convenient to operate, accurate in sampling and good in stability, and provides an effective auxiliary tool for water body organic pollutant monitoring and environmental process research.

Description

Technical Field

[0001] The utility model relates to a sampling device in the technical field of water environment monitoring, in particular to an adsorption sampling device for water pollutants. Background Art

[0002] In the existing technology, the monitoring methods of organic pollutants in water bodies include biological monitoring, active sampling and passive sampling. Among them, the biological monitoring method is affected by metabolism, environmental pressure and biological matrix interference, and the result accuracy is relatively low. Although the active sampling method has high accuracy, it is subject to many limitations, such as cumbersome steps, high cost, and the analysis results can only represent the instantaneous situation. It is not suitable for monitoring pollutants whose concentrations change greatly over time, and it is easy to miss detections for sudden pollution accidents.

[0003] Compared with biological monitoring and active sampling methods, passive sampling devices have a simple structure and can truly reflect the equilibrium concentration or time-averaged concentration of pollutants in the measured system through the concentration of pollutants accumulated in the collector. They do not rely on electrical or mechanical power, can simulate the ingestion of organic pollutants by organisms, accurately reflect the current status of water pollution, and can collect the monitored target substances without affecting the concentration of the parent solution. Therefore, they can avoid the above-mentioned problems existing in traditional active sampling monitoring methods and have good application prospects in pollutant monitoring and environmental process research. The collector structure design of passive sampling devices in the prior art is diverse, some of which have problems such as insufficient adsorption capacity, unstable sampling rate, and susceptibility to environmental interference. Some of them also have the problem that the organic pollutants absorbed after sampling may be released again, resulting in accuracy deviation. At the same time, because they are easily damaged, they are not conducive to being set up in natural waters with fast water flow and complex environment.

[0004] Therefore, it is necessary to optimize and improve the collector structure of the passive sampling device to improve its sampling effect and accuracy while reducing environmental interference and errors. Utility Model Content

[0005] The technical problem solved by the utility model is to provide an adsorption sampling device for water pollutants to solve the shortcomings of the above-mentioned background technology.

[0006] The technical problem solved by the utility model is achieved by the following technical solutions:

[0007] An adsorption sampling device for water pollutants, comprising a collector and filling consumables;

[0008] The collector comprises a cylinder formed of heavy ceramic material; the cylinder has an annular interlayer on the cross section of the cylinder, the annular interlayer is closed on the top surface of the cylinder and open on the bottom surface of the cylinder; the cylinder has sampling windows connected to the annular interlayer formed on both the outer cylinder wall and the inner cylinder wall;

[0009] The filling consumables include a receiving phase, which is uniformly formed between two layers of semipermeable membranes. The sampling structure as a whole is formed into an annular sheet that matches the annular interlayer and is inserted into the annular interlayer. The filling consumables inserted in the annular interlayer are kept in contact with the inner wall of the annular interlayer; the annular sheet is formed as a whole with the sealing plug on the top surface, and the sealing plug is an annular structure that matches the annular interlayer and can be covered and sealed on the open side of the bottom surface of the annular interlayer.

[0010] As a further limitation, the collector has a barrel length of 80-150 mm, an outer diameter of 60-80 mm, and a barrel thickness of 15-30 mm; and the filling amount of the receiving phase in the filling consumable is 30-80 g.

[0011] As a further limitation, the outer contour of the cross section of the collector is a circle or a regular polygon, and the inner contour of the cross section of the collector is a circle.

[0012] As a further limitation, the collector is formed with a hanging part for connecting a traction rope on the top surface of the cylinder, and the hanging part is positionally connected to a floating body or a fixed point through the traction rope.

[0013] As a further limitation, the outer edge of the cylinder body corresponding to the sampling window position is formed with a reinforcing rib.

[0014] As a further limitation, the sampling window is a hollow hole uniformly formed on the surface of the cylinder.

[0015] As a further limitation, the sampling window is a plurality of partitioned window panes formed on the surface of the cylinder, and the filling consumable is formed with an outer protective mesh surface matching the size of the sampling window on the surface of the corresponding semipermeable membrane.

[0016] As a further limitation, the cylinder body seals the top surface of the cylinder inner hole through an upper filter mesh surface at the top surface corresponding to the cylinder inner hole position; and the plug is formed with a lower filter mesh surface at the middle hole position corresponding to the annular structure that can seal the bottom surface of the cylinder inner hole.

[0017] The outer protective mesh surface, the upper filter mesh surface and the lower filter mesh surface are nylon mesh surfaces or polyester mesh surfaces.

[0018] As a further limitation, the receiving phase uses a macroporous adsorption resin layer or an ion exchange resin as a matrix, and the semipermeable membrane is a polyethersulfone membrane.

[0019] Beneficial effects: The adsorption sampling device for water pollutants of the utility model has the advantages of novel structure, good sampling effect, stable sampling rate, and not susceptible to environmental interference. It can adapt to the setting requirements in natural waters with fast water flow and complex environment, and can be maintained for a long time; the adsorption sampling device in use can simulate the process of organisms ingesting organic pollutants and reflect the current status of water pollution. The organic pollutants absorbed after sampling are not easy to be released again, thereby ensuring the accuracy and reliability of the sampling results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a preferred embodiment of the utility model.

[0021] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A.

[0022] Among them: 1. hanging part; 2. upper filter mesh surface; 3. end face packaging part; 4. collector cylinder; 5. annular sheet; 6. partition window pane; 7. partition grille; 8. packaging connection part; 9. plug; 10. lower filter mesh surface; 11. outer protective mesh surface; 12. semi-permeable membrane; 13. receiving phase. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0024] See also Figure 1 , Figure 2 A preferred embodiment of an adsorption sampling device for water pollutants. In this embodiment, the adsorption sampling device includes a collector and filling consumables. The main body of the collector is a collector cylinder 4, and the collector cylinder 4 is formed of heavy ceramic material. The ceramic material ensures its stability and durability in the water body. Compared with light ceramic, heavy ceramic can make the adsorption sampling device naturally fall in the water body under the action of the self-weight of the collector cylinder 4.

[0025] The length of the collector barrel 4 is controlled to be 80~150mm, the outer diameter is 60~80mm, and the barrel thickness is 15~30mm. Such a design can effectively prevent the pressure impact of the water flow on the sampler, ensure the stability and accuracy of the sampling process, and also facilitate the submerged operation, making it easy to place and recover in the water. In this embodiment, the cross-sectional outer contour and the cross-sectional inner contour of the collector barrel 4 are both circular, and a hanging part 1 is formed on the top surface of the collector barrel 4. The hanging part 1 can be connected to the float or fixed point through a traction rope to position and recover the collector.

[0026] The collector barrel 4 has an annular interlayer on the cross section of the barrel, which is closed on the top surface of the barrel and open on the bottom surface of the barrel; the annular interlayer is used to assemble the filling consumables. At the same time, the collector barrel 4 has a sampling window connected to the annular interlayer formed on the outer barrel wall and the inner barrel wall of the corresponding barrel. In this embodiment, the sampling window is divided into four partitioned panes 6 by partitioned grids 7 arranged horizontally and vertically, and the corresponding partitioned grids 7 can also play the role of supporting the outside of the filling consumables and limiting the structure at the sampling window position.

[0027] The filling consumables, as the functional part of the adsorption sampling device, are composed of an annular sheet 5 and a sealing plug 9, and the annular sheet 5 includes a receiving phase 13 as an adsorbent, and the receiving phase 13 is uniformly formed between two layers of semipermeable membranes 12. When the annular sheet 5 is in full contact with the pollutants in the water body, it can pass through the semipermeable membrane 12 and adsorb the pollutants using the receiving phase 13. In addition, considering that the partition window pane 6 with an open structure may cause damage to the semipermeable membrane 12 due to external debris, the present embodiment also forms an outer protective mesh surface 12 on the surface of the semipermeable membrane 12 on both sides as a reinforcement and support structure.

[0028] In this embodiment, the semipermeable membrane 12 can adopt a polyamide membrane with lower cost or a polyethersulfone membrane with better permeability; and the receiving phase 13 can be selected according to the specific type of pollutant. The receiving phase 13 can be a macroporous adsorption resin layer or an ion exchange resin. For example, the HP2MGL series macroporous adsorption resin based on methyl methacrylate is suitable for adsorbing organic pollutants containing functional groups such as carboxyl, ester, amino, and acylamino groups that can be combined with π bonds, the HP20 series and SP207 series macroporous adsorption resins have good adsorption effects on diarrheal shellfish toxins and paralytic shellfish toxins, respectively, and the ion exchange resin is suitable for adsorbing pollutants with corresponding cation / anion affinity; in addition, in actual use, the filling amount of the receiving phase 13 in the filling consumables (30~80g) can be adjusted to adapt to pollutants of different concentrations and types, thereby improving the adaptability and flexibility of the adsorption sampling device.

[0029] The annular sheet 5 is integrally formed into an annular structure matching the annular interlayer in the collector barrel 4. The upper and lower end faces of the annular sheet 5 are sealed respectively by the end face packaging part 3 and the packaging connection part 8, and the annular sheet 5 can also be fixedly connected to the sealing plug 9 through the packaging connection part 8.

[0030] In this embodiment, the seal 9 is an annular rubber plug whose size matches the open surface of the lower part of the annular interlayer in the collector cylinder 4; when the filling consumables are formed, the annular sheet 5 is integrally formed in the annular interlayer of the collector cylinder 4, and is kept in contact with the inner wall of the annular interlayer, while the seal 9 covers the lower end of the collector cylinder 4 to seal the open surface of the lower part of the annular interlayer.

[0031] In addition, in order to adapt to complex water bodies and polluted water bodies, and to prevent pollutants from entering the inner hole of the collector cylinder 4 and accumulating or getting stuck, the present embodiment has an upper filter mesh surface 2 formed at the upper position of the middle hole of the collector cylinder 4, and a lower filter mesh surface 10 formed on the seal 9 corresponding to the lower upper position of the middle hole of the collector cylinder 4. The upper filter mesh surface 2, the lower filter mesh surface 10 and the outer protective mesh surface 11 on the annular sheet 5 are all nylon mesh surfaces. The design of the upper filter mesh surface 2 and the lower filter mesh surface 10 can also effectively prevent pollutants from entering the interior of the collector, protecting the stability and adsorption effect of the receiving phase 13.

[0032] In another embodiment, in order to improve the sampling effect, the following improvement scheme may be provided:

[0033] For example, the collector has reinforced ribs formed on the outer edge corresponding to the sampling window position, which increases the structural strength of the collector and prevents impurities carried in the underwater undercurrent from scouring and damaging the collector cylinder and the sampling window.

[0034] For example, the sampling window is designed as a hollow hole evenly formed on the surface of the cylinder. Such a design can not only ensure sufficient circulation of water, but also prevent contact and damage from impurities carried in underwater undercurrents.

[0035] When this embodiment is used, the device can be directly put into the water body at the selected position by passing the traction rope through the hanging part 1. The device is kept suspended in the water body by the combined action of its own weight and the traction rope to perform passive adsorption sampling of the water body:

[0036] During the sampling process, the collector cylinder 4 can sample the water body by contacting it on the outer cylinder wall side and the inner hole cylinder wall side at the same time, and can adapt to the environment of different water depths and water flow speeds, so that the sampler can be stably suspended in the water body; and after the passive sampling is completed, the annular sheet 5 can be pulled out as a whole at the end of the plug 9, and after the extraction, the receiving phase 13 in the annular sheet 5 can be separated and removed, and then extraction analysis is performed to determine the type and content of organic pollutants in the water body.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An adsorption sampling device for water pollutants, characterized in that: Including collector and filling consumables; The collector comprises a cylinder formed of heavy ceramic material; the cylinder has an annular interlayer on the cross section of the cylinder, the annular interlayer is closed on the top surface of the cylinder and open on the bottom surface of the cylinder; the cylinder has sampling windows connected to the annular interlayer formed on both the outer cylinder wall and the inner cylinder wall; The filling consumables include a receiving phase, which is uniformly formed between two layers of semipermeable membranes. The sampling structure as a whole is formed into an annular sheet that matches the annular interlayer and is inserted into the annular interlayer. The filling consumables inserted in the annular interlayer are kept in contact with the inner wall of the annular interlayer; the annular sheet is formed as a whole with the sealing plug on the top surface, and the sealing plug is an annular structure that matches the annular interlayer and can be covered and sealed on the open side of the bottom surface of the annular interlayer.

2. The adsorption sampling device for water pollutants according to claim 1 is characterized in that: The collector has a barrel length of 80-150 mm, an outer diameter of 60-80 mm, and a barrel thickness of 15-30 mm; the filling amount of the receiving phase in the filling consumable is 30-80 g.

3. The adsorption sampling device for water pollutants according to claim 1 is characterized in that: The outer contour of the cross section of the collector is a circle or a regular polygon, and the inner contour of the cross section of the collector is a circle.

4. The adsorption sampling device for water pollutants according to claim 1 is characterized in that: The collector is formed with a hanging part for connecting a traction rope on the top surface of the cylinder, and the hanging part is connected with a floating body or a fixed point through the traction rope.

5. The adsorption sampling device for water pollutants according to claim 1 is characterized in that: The outer edge of the cylinder body corresponding to the sampling window position is formed with a reinforced rib edge.

6. The adsorption sampling device for water pollutants according to claim 1 is characterized in that: The sampling window is a hollow hole uniformly formed on the surface of the cylinder.

7. The adsorption sampling device for water pollutants according to claim 1 is characterized in that: The sampling windows are multiple partitioned window panes formed on the surface of the cylinder, and the filling consumables are formed with an outer protective mesh surface matching the size of the sampling windows on the surface of the corresponding semipermeable membrane.

8. The adsorption sampling device for water pollutants according to claim 1 is characterized in that: The top surface of the inner hole of the cylinder is sealed by an upper filter mesh surface at a position corresponding to the inner hole of the cylinder on the top surface; and the plug is formed with a lower filter mesh surface at a position corresponding to the middle hole of the annular structure, which can seal the bottom surface of the inner hole of the cylinder.

9. The adsorption sampling device for water pollutants according to claim 7 or 8, characterized in that: The outer protective mesh surface, the upper filter mesh surface and the lower filter mesh surface are nylon mesh surfaces or polyester mesh surfaces.

10. The adsorption sampling device for water pollutants according to claim 1, characterized in that: The receiving phase uses a macroporous adsorption resin layer or an ion exchange resin as a matrix, and the semipermeable membrane is a polyethersulfone membrane.

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