Dynamically controllable soil microcosm experiment device

Abstract

The utility model relates to a dynamically controllable soil microcosm experiment device, and belongs to the technical field of soil experiment equipment. The device comprises a reactor, a gas storage tank, a connecting pipe, a magnetic stirrer, an environmental parameter monitoring device and experimental sampling equipment, the environmental parameter monitoring device and the experimental sampling equipment are arranged at the top of the reactor, the magnetic stirrer is arranged at the bottom of the reactor, and the lower portion of the reactor is externally connected with the gas storage tank through the connecting pipe. By controlling different soil environment conditions and matching with real-time monitoring and timed sampling, the behavior of pollutants in soil is more comprehensively simulated and researched in a highly controllable and dynamic manner, the high consistency of experimental conditions and a natural soil complex environment is ensured, and the operation is simple and convenient.

Description

Technical Field

[0001] The utility model relates to a dynamically controllable soil microcosm experimental device, belonging to the technical field of soil experimental equipment. Background Art

[0002] Soil is a key environmental medium for the interaction between the biosphere and the geosphere. It is vital to the Earth's ecosystem and is responsible for the storage of water and nutrients, maintaining food security, promoting biodiversity, and protecting the Earth from the impacts of climate change. However, global soil health is under threat from a variety of pollution sources, such as heavy metals and engineered nanoparticles. Whether these pollutants are actively or passively released into the soil, they interact with soil particles, natural organic matter, and microorganisms. Although numerous studies have shown that the physical and chemical properties of soil and other environmental factors have a significant impact on the behavior of pollutants, due to the dynamic characteristics and complexity of the soil system, the understanding of the transformation and fate of pollutants in the soil is still limited.

[0003] The migration and transformation of pollutants in the soil environment not only limits the sustainable use of soil resources, but may also trigger a series of complex ecological and environmental effects, thus directly or indirectly affecting human health and life. Therefore, simulating the actual soil environment to deeply study the behavior of pollutants in the dynamic soil environment and their interaction mechanism with soil components is crucial for protecting the soil environment and formulating pollution control measures.

[0004] Batch equilibrium experiment is a common method for analyzing the adsorption-desorption characteristics of pollutants in soil. These experiments are usually carried out in simple reaction vessels such as beakers or conical flasks, and the experimental cost is low. However, the experimental conditions of this method are relatively static, which is far from the dynamic changes of the natural soil environment. In the prior art, for example, Chinese patent document CN209878758U discloses a comprehensive application indoor simulated soil column experimental device, which is used to simulate natural hydrological conditions, but ignores the influence of other environmental factors on the interaction between soil and pollutants. In addition, the device is complicated to operate and costly. Summary of the invention

[0005] In view of the shortcomings of the existing technology, the utility model provides a dynamically controllable soil microcosm experimental device, which simulates and studies the behavior of pollutants in the soil more comprehensively in a highly controllable and dynamic manner by controlling different soil environmental conditions, coordinating real-time monitoring and timed sampling, thereby ensuring a high degree of consistency between the experimental conditions and the complex environment of natural soil and easy operation.

[0006] The technical solution of the utility model is as follows:

[0007] A dynamically controllable soil microcosm experimental device comprises a reactor, a gas storage tank, a connecting pipe, a magnetic stirrer, an environmental parameter monitoring device and an experimental sampling device, wherein:

[0008] An environmental parameter monitoring device and an experimental sampling device are arranged on the top of the reactor, a magnetic stirrer is arranged at the bottom of the reactor, and a gas storage tank is connected to the lower part of the reactor through a connecting pipe.

[0009] Preferably, according to the utility model, the reactor includes a bottom plate, a side plate and a top cover, four side plates are arranged on the upper circumferential side of the bottom plate for vertical sealing, a top cover is arranged on the top of the reactor, a through hole A and a through hole B are arranged on the top cover, an environmental parameter monitoring device is arranged in the through hole A through a rubber plug A, and an experimental sampling equipment is arranged in the through hole B through a rubber plug B.

[0010] Preferably, according to the present invention, the bottom plate, the side plate and the top cover are all made of acrylic plates, which not only ensures the stability of the reactor but also has good light transmittance.

[0011] According to the preferred embodiment of the utility model, the environmental parameter monitoring device uses a monitoring electrode, and the experimental sampling equipment uses a filtration type vacuum sampler.

[0012] Preferably, according to the present invention, a sapphire glass is arranged on the bottom plate, and a stirring rotor of a magnetic stirrer is arranged on the upper side of the sapphire glass. The sapphire glass is scratch-resistant and wear-resistant, and has excellent performance.

[0013] Preferably, according to the utility model, the connecting pipe includes an air inlet pipe, a hose and a gas flow regulating valve. An air inlet pipe is arranged at the lower part of the reactor. The air inlet pipe is connected to a hose through the gas flow regulating valve, and the hose is connected to a gas storage tank.

[0014] When in use, the experimental materials (a mixture of soil and pollutants) are placed in the reactor. Nitrogen or oxygen can be stored in the gas storage tank to simulate the required aerobic, anoxic or anaerobic environment. At the same time, the gas injection flow rate is controlled by the gas flow regulating valve, and the magnetic stirrer drives the stirring rotor to rotate, which plays a stirring role and promotes the interaction of substances in the soil microcosm. At the same time, the monitoring electrode is used to measure the soil environment's pH value, conductivity, redox potential and other environmental parameters in real time. At the planned time point, the experimenters use a suction vacuum sampler to collect soil pore water and analyze the adsorption, analysis, dissolution and other transformation processes of pollutants.

[0015] The beneficial effects of the utility model are:

[0016] The utility model controls different soil environmental conditions, cooperates with real-time monitoring and timed sampling, and more comprehensively simulates and studies the behavior of pollutants in the soil in a highly controllable and dynamic manner, thereby ensuring a high degree of consistency between the experimental conditions and the complex environment of natural soil. The design of the device takes into account mobility, simplicity of operation and control of experimental costs, and provides an innovative tool for soil environmental protection and pollutant behavior research, which can be widely used in scientific research, teaching and industrial practice, with a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the enlarged structure of the reactor of the utility model;

[0019] Figure 3 It is a cross-sectional view of the reactor part of the utility model.

[0020] In the figure: 1. bottom plate; 2. side plate; 3. magnetic stirrer; 4. stirring rotor; 5. sapphire glass; 6. air inlet pipe; 7. hose; 8. gas flow regulating valve; 9. top cover; 10. lower convex part; 11. sealing rubber ring; 12. through hole A; 13. rubber plug A; 14. monitoring electrode; 15. through hole B; 16. rubber plug B. DETAILED DESCRIPTION

[0021] The present invention will be further described below through embodiments and in conjunction with the accompanying drawings, but is not limited thereto.

[0022] Embodiment 1:

[0023] like Figure 1-3 As shown, this embodiment provides a dynamically controllable soil microcosm experimental device, including a reactor, a gas storage tank, a connecting pipe, a magnetic stirrer 3, an environmental parameter monitoring device and an experimental sampling device, wherein:

[0024] An environmental parameter monitoring device and an experimental sampling device are arranged on the top of the reactor, a magnetic stirrer 3 is arranged at the bottom of the reactor, and a gas storage tank is connected to the lower part of the reactor through a connecting pipe.

[0025] The reactor includes a bottom plate 1, a side plate 2 and a top cover 9. Four side plates 2 are arranged on the upper side of the bottom plate 1 for vertical sealing in the circumferential direction. A top cover 9 is arranged on the top of the reactor. A lower convex portion 10 is arranged on the lower side of the top cover. A sealing rubber ring 11 is arranged on the outer side of the lower convex portion 10 to facilitate buckling while ensuring sealing. A through hole A12 and a through hole B15 are arranged on the top cover 9. An environmental parameter monitoring device is arranged in the through hole A12 through a rubber plug A13, and an experimental sampling device is arranged in the through hole B15 through a rubber plug B16.

[0026] The bottom plate 1, the side plate 2 and the top cover 9 are all made of acrylic plates, which not only ensures the stability of the reactor but also has good light transmittance.

[0027] The environmental parameter monitoring device uses a monitoring electrode 14, and the experimental sampling equipment uses a filtration type vacuum sampler.

[0028] A sapphire glass 5 is arranged on the bottom plate 1 , and a stirring rotor 4 of a magnetic stirrer is arranged on the upper side of the sapphire glass 5 . The sapphire glass is scratch-resistant and wear-resistant, and has excellent performance.

[0029] The connecting pipe includes an air inlet pipe 6, a hose 7 and a gas flow regulating valve 8. The lower part of the reactor is provided with an air inlet pipe 6, the air inlet pipe 6 is connected to the hose 7 through the gas flow regulating valve 8, and the hose 7 is connected to a gas storage tank.

[0030] When using, first, according to the research content, ascorbic acid and ferric nitrate solution are added to adjust the reducing and oxidizing properties of the soil to prepare soil samples with different redox properties. Before the experiment, the soil sample and the CdS NPs aqueous solution of preset concentration are placed in the reactor together, and the nitrogen injection is controlled by the gas flow control valve 8 to adjust the redox environment of the soil, and the magnetic stirrer is started to ensure that the CdS NPs aqueous solution and the soil are fully contacted and mixed;

[0031] The pH value, conductivity and redox potential of the experimental process are recorded in real time by monitoring electrode 14, and samples are taken at set time points for measurement to analyze the dissolution and retention characteristics of CdS NPs in dynamic redox soil, thereby effectively evaluating the environmental behavior of CdS NPs under different soil environmental conditions and its potential ecological risks.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dynamically controllable soil microcosm experimental device, characterized in that: It includes a reactor, a gas storage tank, a connecting pipe, a magnetic stirrer, an environmental parameter monitoring device and an experimental sampling device, among which: An environmental parameter monitoring device and an experimental sampling device are arranged on the top of the reactor, a magnetic stirrer is arranged at the bottom of the reactor, and a gas storage tank is connected to the lower part of the reactor through a connecting pipe.

2. The dynamically controllable soil microcosm experimental device according to claim 1, characterized in that: The reactor includes a bottom plate, a side plate and a top cover. Four side plates are arranged on the upper circumferential side of the bottom plate for vertical sealing. A top cover is arranged on the top of the reactor. A through hole A and a through hole B are arranged on the top cover. An environmental parameter monitoring device is arranged in the through hole A through a rubber plug A, and an experimental sampling device is arranged in the through hole B through a rubber plug B.

3. The dynamically controllable soil microcosm experimental device according to claim 2, characterized in that: The bottom panel, side panels and top cover are all made of acrylic panels.

4. The dynamically controllable soil microcosm experimental device according to claim 3, characterized in that: The environmental parameter monitoring device uses monitoring electrodes, and the experimental sampling equipment uses a filtration vacuum sampler.

5. The dynamically controllable soil microcosm experimental device according to claim 4, characterized in that: A sapphire glass is arranged on the bottom plate, and a stirring rotor of a magnetic stirrer is arranged on the upper side of the sapphire glass.

6. The dynamically controllable soil microcosm experimental device according to claim 5, characterized in that: The connecting pipe includes an air inlet pipe, a hose and a gas flow regulating valve. The lower part of the reactor is provided with an air inlet pipe, the air inlet pipe is connected with a hose through the gas flow regulating valve, and the hose is connected with a gas storage tank.

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