Coal gangue-based artificial soil substrate near-soil tone adjustment test method

Abstract

The present application provides a kind of coal gangue-based artificial soil matrix near soil color adjusting test method, comprising the following steps: S1, coal gangue, soil, nutrient regulation function material and color control function material are pulverized, sieved, mixed uniformly according to different proportions, obtain multiple soil matrix samples, the first color measurement and screening are carried out to soil matrix sample;S2, the selected soil matrix sample is soaked with water and fully mixed, after air drying, second color measurement and screening are carried out;S3, the selected soil matrix sample is simulated rainfall and / or simulated irrigation, then surface ploughing disturbance treatment is carried out, third color measurement is carried out, and near soil color soil matrix is screened out.The present application comprehensively considers the color condition under multiple scenarios, avoids the characterization error under single condition, and finally confirms the engineering-oriented colorimetric characterization as the core, with operability.Meanwhile, it also provides support for quickly and accurately determining the ratio of preparing near soil color soil matrix.

Description

Technical Field

[0001] This invention relates to the field of coal-based solid waste resource utilization technology, and in particular to a near-soil color adjustment test method for coal gangue-based artificial soil matrix. Background Technology

[0002] The utilization of coal gangue soil matrix has multiple benefits, including large absorption capacity and potential for ecological and agricultural use, and has broad market application prospects. In practical implementation, although some technologies have achieved water and fertilizer retention functions of artificial coal gangue soil matrix through comprehensive measures such as coal gangue modification and the application of functional materials, effectively supporting the normal growth of ecological vegetation and crops, the visible difference between it and soil limits its application in farmland reclamation around coal mines and in gangue-producing areas. Specifically, farmers' acceptance of returning reclaimed land is generally low, and this problem greatly restricts the local and nearby promotion of coal gangue soil matrix utilization technology.

[0003] Because coal gangue generally exhibits significant variations in properties (including color differences), independent color adjustment experiments are required for the soil utilization of specific coal gangue. Therefore, establishing a complete, accurate, and efficient experimental workflow will provide crucial technical support for subsequent engineering application trials, enhancing engineering efficiency and benefits. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a near-soil color adjustment test method for coal gangue-based artificial soil matrix, standardizing the technical process for near-soil color control of coal gangue soil matrix, improving work efficiency and quality. Using this test method, the near-soil appearance characteristics of coal gangue-containing soil matrix can be improved, making the color of the coal gangue-containing soil matrix closer to that of local soil.

[0005] This invention provides a method for adjusting the near-soil color of an artificial soil matrix based on coal gangue, comprising the following steps:

[0006] S1, coal gangue, soil, nutrient regulating functional materials and color regulating functional materials are crushed, sieved, and mixed evenly according to different ratios to obtain a variety of soil matrix samples with different ratios. The color of the soil matrix samples is compared with that of the local soil, and the soil matrix samples are subjected to the first colorimetric test to screen out several soil matrix samples that are close to the color of the local soil under dry conditions.

[0007] S2, the soil matrix samples finally screened in step S1 are soaked in water and thoroughly mixed to form mud. After air drying, a second colorimetric test is performed to screen out several soil matrix samples that are close to the local soil color in the wet and mixed state.

[0008] S3. Simulate rainfall and / or irrigation on the soil matrix samples finally selected in step S2. Then, perform surface tillage and disturbance on the soil matrix samples, observe the separation state of the surface particle components of the soil matrix samples, and perform a third colorimetric test to select soil matrix samples that are close to the local soil color, which are the near-soil-colored soil matrix.

[0009] In some embodiments, in step S2, the air-dried soil matrix sample is first crushed and then subjected to colorimetric analysis.

[0010] In some embodiments, the methods for the first, second, and third color measurements include visual inspection and / or color measurement using a colorimeter.

[0011] In some embodiments, in step S3, when the soil matrix sample prepared in step S1 is subjected to simulated rainfall and / or simulated irrigation, the water content of the soil matrix sample is made to reach 75%-95%.

[0012] In some embodiments, in step S3, when performing surface tillage and disturbance treatment on the soil matrix sample, the soil matrix sample with a depth of less than 10 cm is tilled and disturbed manually or mechanically.

[0013] In some embodiments, in step S3, the method for simulating rainfall is to simulate it by spraying water with a watering can.

[0014] In some embodiments, in step S3, the method of simulating irrigation is to simulate it by injecting water.

[0015] In some embodiments, in step S1, the crushed and sieved coal gangue, soil, nutrient regulating functional material and color regulating functional material are mixed evenly using a dry powder mixing device.

[0016] In some embodiments, in step S1, the particle size of the coal gangue, soil, nutrient regulating material and color regulating material screened out during sieving is less than 3 mm.

[0017] In some embodiments, the color-regulating functional material is a mineral material or includes both mineral and chemical materials. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings.

[0019] in:

[0020] Figure 1 A physical image of the dry soil matrix prepared according to the test method of Example 1 of the present invention;

[0021] Figure 2 A photograph of the soil matrix prepared by the test method of Example 1 of the present invention, after being wetted with water and then air-dried.

[0022] Figure 3 A physical image of the simulated irrigated soil substrate prepared according to the test method of Embodiment 1 of the present invention;

[0023] Figure 4 A comparison image of the soil matrix prepared according to the experimental method of Embodiment 1 of the present invention after simulated irrigation followed by surface tillage and disturbance (lower half) and without surface tillage and disturbance treatment (upper half). Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] The following describes a near-soil color adjustment test method for coal gangue-based artificial soil matrix according to an embodiment of the present invention, with reference to the accompanying drawings.

[0026] This invention provides a method for adjusting the near-soil color of an artificial soil matrix based on coal gangue, comprising the following steps:

[0027] S1, coal gangue, soil, nutrient regulating functional materials and color regulating functional materials are crushed, sieved, and mixed evenly according to different ratios to obtain a variety of soil matrix samples with different ratios. The color of the soil matrix samples is compared with that of the local soil, and the soil matrix samples are subjected to the first colorimetric test to screen out several soil matrix samples that are close to the color of the local soil under dry conditions.

[0028] S2, the soil matrix samples finally screened in step S1 are soaked in water and thoroughly mixed to form mud. After air drying, a second colorimetric test is performed to screen out several soil matrix samples that are close to the local soil color in the wet and mixed state.

[0029] S3. Simulate rainfall and / or irrigation on the soil matrix samples finally selected in step S2. Then, perform surface tillage and disturbance on the soil matrix samples, observe the separation state of the surface particle components of the soil matrix samples, and perform a third colorimetric test to select soil matrix samples that are close to the local soil color, which are the near-soil-colored soil matrix.

[0030] The experimental method of this invention comprehensively considers the color conditions under various scenarios, including dry conditions, the effects of water immersion disturbance, and the influence of natural and artificial water replenishment. It avoids characterization errors under single conditions and focuses on engineering-oriented colorimetric characterization for final confirmation. The steps are clear, the scenarios are comprehensive, the results are reliable, and it is operable. It also provides support for quickly and accurately determining the proportions of soil matrices that closely resemble soil color.

[0031] The near-soil-colored soil matrix prepared using the experimental method of this invention can improve the near-soil appearance characteristics of soil matrix containing coal gangue, making the color of the soil matrix containing coal gangue closer to that of the local soil, providing an effective guarantee for the market application of coal gangue soil utilization technology and increasing market acceptance.

[0032] It should be noted that the surface tillage disturbance treatment mentioned in step S3 is necessary because after simulated rainfall and / or simulated irrigation, the surface particle components of the soil matrix sample separate under the influence of water, and each material will exhibit its own color individually, rather than the color of the mixture in the dry state. Therefore, surface tillage disturbance treatment is required. For a comparison of the before and after surface tillage disturbance treatment, please see... Figure 4 . Figure 4 The upper part shows clearly separated particles. Figure 4 The lower half shows that after surface tillage and disturbance, the various materials of the soil matrix are evenly mixed, exhibiting the color of the mixed material.

[0033] It should be noted that the step S2, which involves soaking the soil matrix sample in water, mixing it thoroughly, and then air-drying it, takes into account the color change of the soil matrix sample under the influence of water. During the experiment, it was found that different materials had different effects on soaking and agitation. For some materials, the color and appearance of the dry soil matrix sample differed significantly from those after soaking and agitation. Therefore, this step is necessary. The later mention of using simulated rainfall and / or simulated irrigation followed by surface tillage and disturbance treatment of the soil matrix sample is closer to actual field application conditions. Under field irrigation and natural rainfall conditions, there is no mixing step. However, because this may cause particle separation of some mineral materials, surface tillage and disturbance treatment (light tillage) is necessary to further observe the effect of surface tillage and disturbance treatment.

[0034] The soil matrix sample used in step S3 is not a further processing of the air-dried soil matrix sample from step S2, but rather a simulated irrigation and rainfall treatment of the soil matrix sample initially prepared in step S1. Only after the soil matrix sample prepared in step S1 meets the requirements for both the dry colorimetric measurement in step S1 and the wet colorimetric measurement in step S2, is the soil matrix sample prepared in step S1 subjected to the simulated rainfall and irrigation conditions in step S3 for further colorimetric measurement.

[0035] In some embodiments, in step S2, the air-dried soil matrix sample is first crushed and then subjected to colorimetric analysis.

[0036] In some embodiments, the methods for the first, second, and third color measurements include visual inspection and / or color measurement using a colorimeter.

[0037] In some embodiments, in step S3, when the soil matrix sample prepared in step S1 is subjected to simulated rainfall and / or simulated irrigation, the moisture content of the soil matrix sample is made to reach 75%-95%.

[0038] In some embodiments, in step S3, when performing surface tillage and disturbance treatment on the soil matrix sample, the soil matrix sample with a depth of less than 10 cm is tilled and disturbed manually or mechanically.

[0039] In some embodiments, in step S3, the method for simulating rainfall is to simulate it by spraying water with a watering can.

[0040] In some embodiments, in step S3, the method of simulating irrigation is to simulate it by injecting water.

[0041] In some embodiments, in step S1, the crushed and sieved coal gangue, soil, nutrient regulating functional material and color regulating functional material are mixed evenly using a dry powder mixing device.

[0042] In some embodiments, during step S1, the particle size of the coal gangue, soil, nutrient regulating material, and color regulating material screened out during sieving is less than 3 mm, preferably less than 2 mm. This facilitates mixing, improves the uniformity of the mixture, and results in a better mixing effect. Furthermore, it requires less mechanical crushing work.

[0043] It should be noted that if the particle size is controlled too small, such as less than 1 mm, the amount of mechanical crushing required will be large, and the material needs to be crushed more finely. If the particle size is controlled too large, such as less than 5 mm, the volume of the material particles will be large, reducing the uniformity of the mixture and resulting in a poor mixing effect.

[0044] In some embodiments, the color-regulating functional material is a mineral material or includes both mineral and chemical materials.

[0045] Furthermore, mineral materials such as red soil, vermiculite, kaolin, and Fe2O3 can be selected, while chemical materials such as biochemical potassium humate can be chosen. Chemical materials are used to supplement and consolidate the color-correcting effect, and biochemical potassium humate is also an excellent soil conditioner with no toxic side effects.

[0046] The present invention will be further illustrated by specific embodiments below.

[0047] Example 1

[0048] S1. The coal gangue was crushed and passed through a 2mm sieve. Color analysis using a colorimeter showed L: 39.80, a: 1.31, b: 3.01. Local soil samples were taken and color analyzed using a colorimeter, showing L: 38.60, a: 4.66, b: 14.25. Therefore, only the values ​​of a and b need to be adjusted.

[0049] S2, the crushed coal gangue is mixed with functional materials such as biochar, microbial fertilizer, water-retaining agent, and humic acid to obtain artificial soil matrix A. The color is measured using a colorimeter, showing L: 39.20, a: 1.64, b: 2.40.

[0050] S3, artificial soil matrix A is mixed with kaolin, vermiculite, red soil, and Fe2O3 in a mass ratio of 100:3:4:8:0.5 to obtain artificial soil matrix B, which has a near-loess color when dry. Figure 1 As shown, the colorimeter readings are L: 45.02, a: 6.62, b: 13.99. Both visual inspection and colorimeter data meet the requirements.

[0051] S4, artificial soil matrix B is moistened with water, mixed, and air-dried to obtain artificial soil matrix C, which has a near-loess color. Figure 2 As shown, the colorimeter readings are L: 44.51, a: 6.59, b: 13.21. Both visual inspection and colorimeter data meet the requirements.

[0052] S5. Place artificial soil substrate B into a container and wet the substrate by injecting water through the side wall of the container. The overall state should resemble soil, with sporadic coal gangue particles present. Figure 3 As shown, the soil condition improved after surface tillage and disturbance treatment, as indicated. Figure 4 As shown, Figure 4 The upper part is the soil matrix that has not been disturbed by topsoil tillage. Figure 4 The lower half of the mixture is the soil substrate that has undergone surface tillage and disturbance treatment. It is clearly visible that the upper half contains more granular material, while the lower half is free of granules and appears uniformly mixed. After drying, it exhibits a near-soil color. This demonstrates that the substrate color adjustment method of this embodiment has a good near-soil color treatment effect.

[0053] Example 2

[0054] S1. Coal gangue was crushed and passed through a 2mm sieve. Color was measured using a colorimeter, showing L: 39.80, a: 1.31, b: 3.01. Local soil samples were taken and color was measured using a colorimeter, showing L: 38.60, a: 4.66, b: 14.25.

[0055] S2, the crushed coal gangue is mixed with functional materials such as biochar, microbial fertilizer, water-retaining agent, and humic acid to form artificial soil matrix A. The colorimeter is used to measure the color, showing L: 39.20, a: 1.64, b: 2.40.

[0056] S3, artificial soil matrix A was mixed with red soil in five ratios: 100:10, 100:20, 100:30, 100:40 and 100:50. The red soil with more than 30% content in the dry state had a near loess color. The colorimeter showed that the L and a values ​​were close to the local soil values ​​(see Table 1).

[0057] S4. After immersing and mixing the five soil samples with water to simulate the soil color and then air-drying them, the overall appearance was gray. The colorimeter showed a significant decrease in the a value (see Table 1). Because the soil did not have a stable near-soil color, the method and parameters of this embodiment were discarded.

[0058] Table 1

[0059]

[0060] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for adjusting the near-soil color of a coal gangue-based artificial soil matrix, characterized in that, Includes the following steps: S1, coal gangue, soil, nutrient regulating functional materials and color regulating functional materials are crushed, sieved, and mixed evenly according to different ratios to obtain a variety of soil matrix samples with different ratios. The soil matrix samples are compared with the color of the local soil, and the soil matrix samples are subjected to the first colorimetric test to screen out several soil matrix samples that are close to the color of the local soil under dry conditions. S2, the soil matrix samples finally screened in step S1 are soaked in water and thoroughly mixed to form mud. After air drying, a second colorimetric test is performed to screen out several soil matrix samples that are close to the local soil color in the wet and mixed state. S3, simulate rainfall and / or simulate irrigation on the soil matrix samples finally screened in step S2, then perform surface tillage and disturbance treatment on the soil matrix samples, observe the separation state of the surface particle components of the soil matrix samples, and perform a third colorimetric test to screen out soil matrix samples that are close to the local soil color, which are the near-soil color soil matrix.

2. The near-soil color adjustment test method for coal gangue-based artificial soil matrix according to claim 1, characterized in that, In step S2, the air-dried soil matrix sample is first crushed and then subjected to color measurement.

3. The near-soil color adjustment test method for coal gangue-based artificial soil matrix according to claim 1, characterized in that, The methods for the first, second, and third color measurements include visual inspection and / or color measurement using a colorimeter.

4. The near-soil color adjustment test method for coal gangue-based artificial soil matrix according to claim 1, characterized in that, In step S3, when the soil matrix sample prepared in step S1 is subjected to simulated rainfall and / or simulated irrigation, the water content of the soil matrix sample is made to reach 75%-95%.

5. The near-soil color adjustment test method for coal gangue-based artificial soil matrix according to claim 1, characterized in that, In step S3, when performing surface tillage and disturbance treatment on the soil matrix sample, the soil matrix sample with a depth of less than 10cm is tilled and disturbed manually or mechanically.

6. The near-soil color adjustment test method for coal gangue-based artificial soil matrix according to claim 1, characterized in that, In step S3, the method for simulating rainfall is to use a spray bottle to simulate it.

7. The near-soil color adjustment test method for coal gangue-based artificial soil matrix according to claim 1, characterized in that, In step S3, the method for simulating irrigation is to simulate it by injecting water.

8. The near-soil color adjustment test method for coal gangue-based artificial soil matrix according to claim 1, characterized in that, In step S1, the crushed and sieved coal gangue, soil, nutrient regulating material and color regulating material are mixed evenly using a dry powder mixing device.

9. The near-soil color adjustment test method for coal gangue-based artificial soil matrix according to claim 1, characterized in that, In step S1, the particle size of the coal gangue, soil, nutrient regulating material and color regulating material screened out during sieving is less than 3 mm.

10. The near-soil color adjustment test method for coal gangue-based artificial soil matrix according to any one of claims 1-9, characterized in that, The color-regulating material is a mineral material or includes both mineral and chemical materials.

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