Method for improving soil fertility after removing mercury from contaminated soil in a mining area

Abstract

The application discloses a method for improving soil fertility after removing mercury from contaminated soil in a mining area, and comprises the following steps: (1) collecting the soil after removing mercury from the contaminated soil in the mining area for analysis; (2) formulating a soil fertility improvement scheme according to the analysis result of step (1); and (3) adding corresponding substances to the soil after removing mercury from the contaminated soil in the mining area according to the scheme in step (2) and mixing them uniformly. The application can ensure the use effect of the soil by analyzing the soil after removing mercury and supplementing corresponding components before putting the soil into use, and can improve the accuracy of soil analysis and the effect of soil fertility repair by designing a brand-new soil storage device which has good sealing performance and is convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to a method for improving the fertility of contaminated soil in a mining area after mercury removal, and belongs to the technical field of environmental protection. BACKGROUND

[0002] Mercury is a global pollutant. During the mining of mercury mines, a large amount of mercury is discharged into the atmosphere, which causes the soil in these areas to be contaminated with mercury, resulting in excessive mercury in agricultural products and exposure risks to the human population.

[0003] Therefore, it is necessary to repair the mercury-contaminated soil. The existing method for removing mercury from soil is thermal desorption, that is, the mercury-containing soil is heated at high temperature to vaporize the mercury and mercury compounds therein, thereby removing the mercury from the soil.

[0004] However, after high-temperature heating for mercury removal, the total nitrogen and other components in the soil are destroyed, and the total phosphorus increases. The soil after mercury removal cannot be directly used and needs to be supplemented with the corresponding nutrients. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a method for improving the fertility of contaminated soil in a mining area after mercury removal, to solve the problems existing in the prior art.

[0006] The technical solution adopted by the present application is: a method for improving the fertility of contaminated soil in a mining area after mercury removal, comprising the following steps:

[0007] (1) collecting the contaminated soil in a mining area after mercury removal for analysis;

[0008] (2) formulating a fertility improvement plan according to the analysis results of step (1);

[0009] (3) adding the corresponding substances to the contaminated soil in a mining area after mercury removal according to the plan in step (2) and mixing uniformly.

[0010] Preferably, the step (1) includes analysis of the following components of the soil: total nitrogen, total phosphorus, and cations.

[0011] Preferably, the fertility improvement plan in step (2) is as follows:

[0012] Increase total nitrogen: add nitrogen-containing organic fertilizer;

[0013] Reduce total phosphorus: add soil with a total phosphorus content lower than the standard value;

[0014] Increase cations: add organic fertilizer or microbial fertilizer.

[0015] Preferably, the soil preservation in step (1) is completed using the following equipment: a bottle body, the mouth of the bottle body is in the shape of a rounded table, and a glass ball is placed at the mouth of the bottle body.

[0016] Preferably, the glass ball is positioned on the bottle body by a rope.

[0017] Preferably, the lower end of the part of the rope located in the bottle body is fixed with a brush.

[0018] Preferably, the end of the rope away from the glass ball penetrates the bottle body and extends to the outside of the bottle body, and the rope is in sliding sealing connection with the bottle body.

[0019] Preferably, a pull ring is fixed on the end of the rope away from the glass ball.

[0020] The beneficial effects of the present application: compared with the prior art, the present application analyzes the soil after mercury removal and supplements the corresponding components before use, ensures the use effect of the soil, and through the design of a new soil storage device, the sealing performance is good, the use is convenient, the accuracy of soil analysis can be improved, and the effect of soil fertility repair can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the bottle body. DETAILED DESCRIPTION

[0022] The present application will be further described below in combination with the drawings and specific examples.

[0023] The reference signs in the drawings of the specification include: bottle body 1, mouth part 2, glass ball 3, rope 4, brush 5, rubber plug 6, cavity 7, pull ring 8, handle 9, sealing plate 10.

[0024] Example 1:

[0025] The method for improving the fertility of the contaminated soil in the mining area after mercury removal includes the following steps:

[0026] (1) Collect the contaminated soil in the mining area after mercury removal to analyze the total nitrogen, total phosphorus and cations;

[0027] (2) According to the analysis results of step (1), the fertility improvement scheme is as follows:

[0028] Increase the total nitrogen: add nitrogen-containing organic fertilizer;

[0029] Reduce the total phosphorus: add soil with total phosphorus content lower than the standard value;

[0030] Increase the cation: add organic fertilizer or microbial fertilizer;

[0031] (3) According to the scheme in step (2), add the corresponding substances to the contaminated soil in the mining area after mercury removal and mix uniformly.

[0032] In step (1), soil preservation is accomplished using the following equipment: Figure 1 As shown, the device includes a bottle body 1, with an inverted frustum-shaped mouth 2. A glass ball 3 is placed at the mouth 2 of the bottle body 1. A cylindrical handle 9 is fixed to the upper end of the glass ball 3, and a frustum-shaped sealing plate 10 is fixed to the middle of the handle 9. The sealing plate 10 matches the mouth 2 of the bottle body 1. A rope 4 is fixedly connected to the lower end of the glass ball 3. A blind hole is opened at the bottom of the bottle body 1, and a through hole is opened on the right side wall of the bottle body 1. The blind hole and the through hole are connected by an L-shaped cavity 7. The end of the rope 4 away from the glass ball 3 extends along the blind hole, the cavity 7, and the through hole to the outside of the bottle body 1. A pull ring 8 is fixed to the end of the rope 4 away from the glass ball 3. A rubber stopper 6 is fixed inside the blind hole. The rope 4 passes through the rubber stopper 6 and is slidably sealed with the rubber stopper 6. A brush bristle 5 is fixed to the lower end of the part of the rope 4 inside the bottle body 1.

[0033] The specific implementation process is as follows: When it is necessary to put a soil sample into the bottle 1, first invert the bottle 1. Under the action of the weight of the handle 9, the sealing plate 10 and the glass bead, the glass bead drives the brush bristles 5 to fall down to the outside of the bottle 1. Then manually reset the bottle 1. The glass bead and the brush bristles 5 are located outside the bottle mouth, and the soil sample can be put into the bottle 1. It should be noted that, since the soil is at a high temperature after mercury removal, in this embodiment, the high-temperature soil after mercury removal must be immediately loaded into bottle 1. After the soil sample is loaded, the glass bead 3 is placed into the mouth 2 of bottle 1 by hand, and the pull ring 8 is used to pull the glass bead down to the lower limit position. During this process, the brush bristles 5 brush the soil in the mouth 2 of bottle 1 into the inside of bottle 1 to avoid the soil in the mouth 2 of bottle 1 affecting the sealing performance of the glass bead 3. The glass bead 3, handle 9 and sealing plate 10 seal the bottle mouth with gravity. However, during transportation, due to shaking, the glass bead may still shake and fall off the mouth 2 of bottle 1. Therefore, it is transported after the soil inside bottle 1 has cooled down. At this time, due to thermal expansion and contraction, the glass bead is firmly attracted to the mouth 2 of bottle 1, thereby achieving the sealing effect.

[0034] When it is necessary to pour out the soil sample, invert the bottle 1, pull the handle 9 by hand, and the glass bead will fall out of the bottle mouth, so that the soil inside the bottle 1 can be poured out. Pull the rope 4 by the handle 9, and the bristles 5 on the rope 4 can discharge the soil from the mouth 2 of the bottle 1, improving the accuracy of subsequent analysis.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of protection of the claims.

Claims

1. A method for improving fertility of contaminated soil in mining areas after mercury removal, characterized by: Includes the following steps: (1) Collect and analyze soil samples from the mining area after mercury removal from contaminants; (2) Develop a fertility improvement plan based on the analysis results of step (1); (3) Add the corresponding substances to the soil after mercury removal from the mining area according to the scheme in step (2) and mix them evenly; The soil preservation in step (1) is accomplished using the following equipment: a bottle body, the mouth of which is an inverted frustum shape, and a glass ball placed at the mouth of the bottle body; The glass ball is held in place on the bottle by a rope; The lower end of the rope located inside the bottle is fixed with bristles; The end of the rope away from the glass ball passes through the bottle body and extends to the outside of the bottle body, and the rope is slidably and sealingly connected to the bottle body; A pull ring is fixed to the end of the rope away from the glass ball.

2. The method for improving fertility of contaminated soil in mining areas after mercury removal according to claim 1, characterized in that: Step (1) includes the analysis of the following components of the soil: total nitrogen, total phosphorus, and cations.

3. The method for improving fertility of contaminated soil in mining areas after mercury removal according to claim 1, characterized in that: The fertility enhancement scheme in step (2) is as follows: Increase total nitrogen: Add nitrogen-containing organic fertilizer; Reduce total phosphorus: Add to soil with total phosphorus content below the standard value; Increase cations: Add organic fertilizer or microbial fertilizer.

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