Deposit heavy metal migration and transformation simulation device

Abstract

The utility model provides a sediment heavy metal migration and conversion simulation device which comprises a box body, an air inlet pipe and an air outlet pipe which are vertical and spaced from each other are arranged in the box body, and the air inlet pipe is connected with an air pump. A plurality of horizontal aeration pipes are arranged between the air inlet pipe and the air outlet pipe, a plurality of aeration holes are formed in the pipe walls of the aeration pipes, the aeration pipes are sequentially arranged upwards at intervals from the bottom of the box body, a preset distance is formed between the aeration pipe at the bottommost part and the bottom of the box body, and the bottom of the box body is used for stacking sediments. A plurality of sampling pipes are arranged on the side wall of the box body in the vertical direction, and each sampling pipe is provided with a valve. The water flow state at the bottom of a river can be simulated, and the conversion rule of water flow to heavy metal in sediments and water can be researched.

Description

Technical Field

[0001] The utility model belongs to the field of heavy metal migration and transformation simulation test instruments, in particular to a sediment heavy metal migration and transformation simulation device. Background Art

[0002] Heavy metals are typical cumulative pollutants with the characteristics of wide distribution, difficulty in degradation, significant bioaccumulation and high toxicity. They can enter water bodies through multiple pathways and accumulate in sediments at the bottom of the water. Sediments are an important part of the aquatic ecological environment. Heavy metals in sediments can be transformed and migrated through precipitation and dissolution, adsorption and desorption, and release, causing a series of environmental and health problems. Since different heavy metals can be transformed into each other in water bodies and sediments, soluble heavy metals in water bodies are easily adsorbed on suspended matter and gradually transferred to sediments. Heavy metals in sediments are transformed into overlying water bodies through dissolution, desorption, and release, showing different biological toxicity, thereby threatening water ecological safety. Therefore, the content of heavy metals in sediments and water bodies at different depths are important reference indicators for determining water environmental quality.

[0003] From the above, we can see that studying the transformation mechanism of heavy metals between water and sediment is of great significance for the later precise water pollution prevention and control and ensuring the water ecological safety of the basin. It is very necessary to set up a set of experimental devices simulating the riverbed environment in order to study the transformation law of heavy metals in sediment and water under the water flow state. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the utility model provides a sediment heavy metal migration and transformation simulation device, which can simulate the water flow state at the bottom of the river and help study the transformation law of heavy metals in sediments and water bodies due to water flow.

[0005] In order to achieve the purpose of this utility model, the following scheme is proposed:

[0006] A sediment heavy metal migration and transformation simulation device comprises a box body, inside of which a vertical air inlet pipe and an air outlet pipe spaced apart from each other are arranged, and the air inlet pipe is connected to an air pump.

[0007] A plurality of horizontal aeration pipes are arranged between the air inlet pipe and the air outlet pipe, and a plurality of aeration holes are opened on the pipe wall. The aeration pipes are arranged in sequence from the bottom of the box upward, and there is a predetermined distance between the bottom aeration pipe and the bottom of the box. The bottom of the box is used to stack sediments.

[0008] A plurality of sampling tubes are arranged on the side wall of the box body in the vertical direction, and each of the sampling tubes is provided with a valve.

[0009] The beneficial effect of the utility model is that by controlling the aeration flow rate and aeration time and testing water samples taken from sampling tubes at different heights, the concentration changes of heavy metals in different depths of the water body can be known, thereby exploring the laws of migration and transformation of heavy metals in sediments and water bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0011] Figure 1 A schematic diagram of the internal structure of the present application is shown.

[0012] Figure 2 A schematic diagram of the external structure of the present application is shown.

[0013] Markings in the figure: box-1, air inlet pipe-2, air outlet pipe-3, aeration pipe-4, control valve-5, sampling pipe-6. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings, but the embodiments described in the utility model are only part of the embodiments of the utility model, rather than all the embodiments.

[0015] like Figure 1 , Figure 2 As shown, a sediment heavy metal migration and transformation simulation device comprises: a box body 1, inside of which are arranged vertical and mutually spaced air inlet pipe 2 and air outlet pipe 3, and the air inlet pipe 2 is connected to an air pump.

[0016] A plurality of horizontal aeration pipes 4 are provided between the air inlet pipe 2 and the air outlet pipe 3, and a plurality of aeration holes are provided on the pipe wall. The diameter of the aeration holes is 2 mm, and the interval between adjacent aeration holes is 10 mm. The plurality of aeration pipes 4 are arranged in sequence from the bottom of the box body 1 upward, and there is a certain distance between the bottom aeration pipe 4 and the bottom of the box body 1, and the bottom of the box body 1 is used to stack sediments.

[0017] A plurality of sampling tubes 6 are provided on the side wall of the box body 1 in the vertical direction, and each of the sampling tubes 6 is provided with a valve.

[0018] During the test, compressed air is introduced into the air inlet pipe 2 through an air pump, the pressure of the compressed air can be controlled by the air pump, and the compressed air is discharged from the aeration holes to simulate the turbulent state of the bottom of the water. The bottom of the box 1 is used to pile up sediments to simulate the riverbed environment. By controlling the aeration flow rate and aeration time, the water samples taken from the sampling tubes 6 at different heights are tested, and the concentration changes of heavy metals in different depths of the water body can be known, thereby exploring the laws of migration and transformation of heavy metals in sediments and water bodies.

[0019] Preferably, Figure 1 As shown, the aeration pipes 4 are each individually provided with a control valve 5 so as to individually control the aeration amounts at different water depths, thereby more realistically simulating the flow state of the water body.

[0020] Preferably, the box body 1 is made of a transparent material, specifically a glass plate or an acrylic plate, so as to facilitate observation of the state of the sediment.

[0021] Preferably, Figure 2 As shown, the air inlet pipe 2 and the air outlet pipe 3 are respectively arranged in the middle of two opposite sides of the box body 1, so as to make the water flow states on both sides tend to be consistent.

[0022] Preferably, the distance between adjacent aeration tubes 4 is 200 mm, so as to avoid the water flow stratification being unclear due to the distance being too small, or the heavy metals being unable to complete the migration between the bottom and the top due to the distance being too large.

[0023] Preferably, the distance between the bottom aeration pipe 4 and the bottom surface of the box 1 is greater than or equal to 200 mm to prevent excessive agitation of the sediment due to a small distance, resulting in the sediment being completely mixed into the water body and losing the sediment shape. If the distance is too large, the efficiency of heavy metal migration and transformation from the sediment to the water body will be too low.

[0024] The above is only a preferred embodiment of the utility model, and does not mean that it is the only one or limit the utility model. Those skilled in the art should understand that various changes or equivalent replacements made to the utility model without departing from the scope of the utility model are within the scope of protection of the utility model.

Claims

1. A sediment heavy metal migration and transformation simulation device, characterized in that: include: A box body (1) is provided with an air inlet pipe (2) and an air outlet pipe (3) vertically and spaced apart from each other, and the air inlet pipe (2) is connected to an air pump; A plurality of horizontal aeration pipes (4) are provided between the air inlet pipe (2) and the air outlet pipe (3), and a plurality of aeration holes are provided on the pipe walls. The plurality of aeration pipes (4) are arranged in sequence from the bottom of the box body (1) upwards at intervals, and a predetermined distance is provided between the bottommost aeration pipe (4) and the bottom of the box body (1). The bottom of the box body (1) is used for stacking sediments. A plurality of sampling tubes (6) are provided on the side wall of the box body (1) in a vertical direction, and each of the sampling tubes (6) is provided with a valve.

2. A sediment heavy metal migration and transformation simulation device according to claim 1, characterized in that: Each aeration pipe (4) is individually provided with a control valve (5).

3. A sediment heavy metal migration and transformation simulation device according to claim 1, characterized in that: The box body (1) is made of transparent material.

4. The sediment heavy metal migration and transformation simulation device according to claim 1, characterized in that: The air inlet pipe (2) and the air outlet pipe (3) are respectively arranged in the middle of two opposite sides of the box body (1).

5. The sediment heavy metal migration and transformation simulation device according to claim 1, characterized in that: The distance between adjacent aeration tubes (4) is 200 mm.

6. A sediment heavy metal migration and transformation simulation device according to claim 1 or 5, characterized in that: The diameter of the aeration holes is 2 mm, and the interval between adjacent aeration holes is 10 mm.

7. The sediment heavy metal migration and transformation simulation device according to claim 1, characterized in that: The distance between the bottom aeration pipe (4) and the bottom surface of the box body (1) is greater than or equal to 200 mm.

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