Bamboo charcoal-containing saline alkali soil treatment and remediation agent and preparation method thereof
By using bamboo charcoal-containing repair agents in saline-alkali soil, combined with titanium gypsum, modified active coke and composite additives, the problem of insufficient soil improvement performance in the prior art has been solved, and the environmental safety of the soil and crop growth have been significantly improved. The conditions allow for more efficient salt and alkalinity reduction effects.
Patent Information
- Application Number
- CN202411299075.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2024-12-27
AI Technical Summary
When used, the improvement performance of existing saline-alkali soil repair agents needs to be improved, and it is difficult to effectively reduce the salt and alkalinity in the soil, affecting the growth of crops.
Using salt-alkali soil treatment and repair agents containing bamboo charcoal, the soil is improved by combining titanium gypsum with bamboo charcoal, and the stabilization effect of titanium gypsum and adsorption of bamboo charcoal, combined with modified active coke and composite additives (phosphogypsum and bentonite) to improve the soil. The physical and chemical properties and nutritional elements are provided, which reduces the salt content of the soil, and enhances its adsorption capacity by acidizing modified active cokes.
It improves the environmental safety, breathability, water permeability and fertility of the soil, promotes the growth and development of plants, provides a more suitable growth environment, and enhances the permeability and water retention ability of the soil.
Smart Images
Figure CN119193166A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of soil repair agents, in particular to a saline-alkali soil treatment and repair agent containing bamboo charcoal and a preparation method thereof. Background Art
[0002] Saline-alkali soil is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. At present, one of the main measures for treating saline-alkali land is to apply soil conditioners. There are many types of existing soil conditioners, which are mainly divided into two categories: solid and liquid.
[0003] The Chinese patent with the publication number CN101417286A discloses a saline-alkali soil repair agent, which is composed of desulfurized gypsum, natural organic matter, microbial fertilizer and inorganic nutrients in a weight ratio of 60-70:25-35:1-4:3-6; the content of calcium sulfate dihydrate in the desulfurized gypsum is more than 80%; the natural organic matter is composed of weathered coal and peat in a weight ratio of 1.0:0.93; the effective bacteria content in the microbial fertilizer is 200 million / gram; the inorganic nutrients are composed of urea, superphosphate and potassium chloride in a weight ratio of 1.0:2.42:0.75. The repair agent of the invention can use the calcium ions in the desulfurized gypsum to replace the sodium ions in the soil, thereby reducing the alkalinity in the soil, and also provide calcium and sulfur elements for crops. The natural organic matter can reduce and regulate the salt content and alkalinity of the soil. Moreover, the natural organic matter, microbial fertilizer and inorganic nutrients can also provide a large amount of nutrients such as nitrogen, phosphorus and potassium for crops, so that the crops grow normally, thereby increasing the yield of crops. However, the soil improvement performance of the above-mentioned soil remediation agent needs to be improved when used; therefore, the present invention provides a saline-alkali soil treatment and remediation agent containing bamboo charcoal and a preparation method thereof to solve the above-mentioned problem. Summary of the invention
[0004] In view of the deficiencies in the prior art, the present invention provides a saline-alkali soil treatment and restoration agent containing bamboo charcoal and a preparation method thereof, which solves the problems mentioned in the above background technology.
[0005] To achieve the above purpose, the present invention is implemented by the following technical scheme: a saline-alkali soil treatment and repair agent containing bamboo charcoal, comprising the following raw materials in parts by weight: 2 to 5 parts of bamboo charcoal, 5 to 8 parts of modified activated coke, 8 to 13 parts of composite additives, and 35 to 60 parts of titanium gypsum; The preparation method of the modified activated coke is: (1) Pour 250 mL of mixed acid solution into 40-50 g of activated coke, place at room temperature, and stir at a speed of 180-200 r / min for 6-8 h; (2) Filtration; (3) Finally, the product is dried in a drying oven at 105-110°C to obtain modified activated coke.
[0006] Preferably, the preparation method of the bamboo charcoal is: rinse the bamboo with deionized water, dry it, pass it through a 30-40 mesh sieve, and then place it in a tubular heating furnace, continuously pass nitrogen, heat it, and pyrolyze it for 1.8-2 hours, and then cool it to room temperature to obtain bamboo charcoal.
[0007] Preferably, the heating rate is 3-5°C / min, and the temperature is raised to 580-600°C.
[0008] Preferably, in (1), the mixed acid solution is prepared by mixing H2SO4 with a concentration of 2 mol / L and HNO3 with a concentration of 1 mol / L, and the volume ratio of H2SO4 to HNO3 is 1:1.
[0009] Preferably, the preparation method of the composite additive is: 20 to 26 parts of phosphogypsum and 20 to 30 parts of bentonite are naturally air-dried, and then 2.5 to 6 parts of humic acid, the naturally air-dried phosphogypsum and bentonite are crushed, ground, sieved, and then mixed to obtain the composite additive.
[0010] Preferably, humic acid is sieved through 80-90 mesh, phosphogypsum is sieved through 35-45 mesh, and bentonite is sieved through 40-45 mesh.
[0011] A method for preparing a saline-alkali soil treatment and repair agent containing bamboo charcoal, specifically comprising the following preparation steps: Step 1: pretreating titanium gypsum; Step 2: Mix the treated titanium gypsum and bamboo charcoal, grind and sieve them in sequence; Step 3: Add modified activated coke and composite additives and mix well to obtain a saline-alkali soil treatment and restoration agent containing bamboo charcoal.
[0012] Preferably, in step 1, the specific pretreatment method of titanium gypsum is: after ultrasonically washing the titanium gypsum for 4 to 5 times, place it in a constant temperature drying oven at 105 to 110° C. and dry it for 2 to 2.2 hours, then grind it and pass it through a 20 to 30 mesh sieve. Beneficial Effects
[0013] The present invention provides a saline-alkali soil treatment and repair agent containing bamboo charcoal and a preparation method thereof. Compared with the prior art, it has the following beneficial effects: (1) The saline-alkali soil treatment and restoration agent containing bamboo charcoal and its preparation method achieve a synergistic restoration effect on the soil by combining titanium gypsum with bamboo charcoal, utilizing the stabilization effect of titanium gypsum on heavy metals and the adsorption effect of bamboo charcoal on organic pollutants, thereby improving the physical and chemical properties of the soil and enhancing the environmental safety of the soil.
[0014] (2) The saline-alkali soil treatment and restoration agent containing bamboo charcoal and its preparation method, by acidifying and modifying the activated coke, the alkaline substances in the soil are neutralized, thereby reducing the salt content of the soil and providing a more suitable soil environment for the growth of crops; and the activated coke itself contains a large number of microporous structures, which makes it have good adsorption properties. Therefore, when the activated coke is acidified, its surface properties change, further enhancing its adsorption capacity, thereby adsorbing harmful substances in the soil, improving the structure and texture of the soil, and improving the air permeability and water permeability of the soil; and the surface of the activated coke after acidification treatment has more acidic functional groups attached to it, which can react with the nutrient elements in the soil, improve the effectiveness of the nutrients, promote the absorption and utilization of crops, and benefit plant growth.
[0015] (3) The saline-alkali soil treatment and restoration agent containing bamboo charcoal and the preparation method thereof can increase the effective phosphorus and potassium content in the soil through the coordinated use of phosphogypsum and bentonite. At the same time, humic acid, as a natural organic substance, can synergize with them to provide rich organic matter, which helps to improve the fertility of the soil and promote the growth and development of plants. At the same time, both phosphogypsum and bentonite have good water retention and fertilizer retention properties, and can improve the physical properties of the soil, such as increasing the soil aggregate structure, improving the soil permeability and water retention capacity, and the addition of humic acid can react with the minerals in the soil to form a more stable aggregate structure, thereby improving the quality of the soil and further enhancing the soil permeability and water retention capacity. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 Electron microscope images of activated coke before and after modification provided by the present invention for a saline-alkali soil treatment and repair agent containing bamboo charcoal and a preparation method thereof; Figure 2 A comparison chart of the total salt content of soil provided by a saline-alkali soil treatment and repair agent containing bamboo charcoal and a preparation method thereof of the present invention; Figure 3 A soil water retention rate comparison chart provided for a saline-alkali soil treatment and repair agent containing bamboo charcoal and a preparation method thereof according to the present invention; Figure 4 A growth comparison diagram of tea seedlings provided for a saline-alkali soil treatment and repair agent containing bamboo charcoal and a preparation method thereof of the present invention. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] In the technical scheme, the preparation method of bamboo charcoal is as follows: rinse the bamboo with deionized water, dry it, and then pass it through a 40-mesh sieve, then place it in a tubular heating furnace, continuously pass nitrogen, increase the temperature to 580°C at a rate of 4°C / min, and pyrolyze it for 2 hours, then cool it to room temperature to obtain bamboo charcoal. Example
[0019] A method for preparing a saline-alkali soil treatment and repair agent containing bamboo charcoal, specifically comprising the following preparation steps: Step 1: pretreat 35 g of titanium gypsum; Step 2: Mix the treated titanium gypsum with 5g of bamboo charcoal, grind and sieve them in sequence; Step 3: Add 8 g of modified activated coke and 13 g of composite additives, mix well, and obtain a saline-alkali soil treatment and restoration agent containing bamboo charcoal; The preparation method of modified activated coke is as follows: pour 250 mL of a mixed solution of 2 mol / L H2SO4 and 1 mol / L HNO3 in a volume ratio of 1:1 into 40 g of activated coke, place at room temperature, stir at a speed of 180 r / min for 6 hours, and then filter; finally place in a drying oven at 105°C for drying to obtain modified activated coke; The preparation method of the composite additive is as follows: 20g of phosphogypsum and 30g of bentonite are naturally air-dried respectively, then 6g of humic acid is crushed and ground and passed through an 80-mesh sieve, the naturally air-dried phosphogypsum is crushed and ground and passed through a 35-mesh sieve, the naturally air-dried bentonite is crushed and ground and passed through a 40-mesh sieve, and then mixed to obtain the composite additive. Example
[0020] A method for preparing a saline-alkali soil treatment and repair agent containing bamboo charcoal, specifically comprising the following preparation steps: Step 1: pretreat 50 g of titanium gypsum; Step 2: Mix the treated titanium gypsum with 3g of bamboo charcoal, grind and sieve in sequence; Step 3: Add 6 g of modified activated coke and 10 g of composite additive, mix well, and obtain a saline-alkali soil treatment and restoration agent containing bamboo charcoal; The preparation method of modified activated coke is as follows: pour 250 mL of a mixed solution of 2 mol / L H2SO4 and 1 mol / L HNO3 in a volume ratio of 1:1 into 45 g of activated coke, place at room temperature, stir at a speed of 190 r / min for 7 hours, and then filter; finally place in a drying oven at 110°C for drying to obtain modified activated coke; The preparation method of the composite additive is as follows: 23g of phosphogypsum and 25g of bentonite are naturally air-dried respectively, and then 4g of humic acid is crushed and ground and passed through an 85-mesh sieve, the naturally air-dried phosphogypsum is crushed and ground and passed through a 40-mesh sieve, the naturally air-dried bentonite is crushed and ground and passed through a 45-mesh sieve, and then mixed to obtain the composite additive. Example
[0021] A method for preparing a saline-alkali soil treatment and repair agent containing bamboo charcoal, specifically comprising the following preparation steps: Step 1: pretreat 60 g of titanium gypsum; Step 2: Mix the treated titanium gypsum with 2g of bamboo charcoal, grind and sieve in sequence; Step 3: Add 5 g of modified activated coke and 8 g of composite additives, mix well, and obtain a saline-alkali soil treatment and restoration agent containing bamboo charcoal; The preparation method of modified activated coke is as follows: pour 250 mL of a mixed solution of 2 mol / L H2SO4 and 1 mol / L HNO3 in a volume ratio of 1:1 into 50 g of activated coke, place it at room temperature, stir it at a speed of 200 r / min for 8 hours, and then filter it; finally, place it in a drying oven at 110°C for drying to obtain modified activated coke; The preparation method of the composite additive is as follows: 26g of phosphogypsum and 20g of bentonite are naturally air-dried respectively, and then 2.5g of humic acid is crushed and ground and passed through a 90-mesh sieve, the naturally air-dried phosphogypsum is crushed and ground and passed through a 45-mesh sieve, the naturally air-dried bentonite is crushed and ground and passed through a 45-mesh sieve, and then mixed to obtain the composite additive.
[0022] Comparative Example 1 A method for preparing a saline-alkali soil treatment and repair agent containing bamboo charcoal, specifically comprising the following preparation steps: Step 1: Mix 5g of bamboo charcoal, grind and sieve in sequence; Step 2: Add 8 g of modified activated coke and 13 g of composite additive, mix well, and obtain a saline-alkali soil treatment and restoration agent containing bamboo charcoal; The preparation method of modified activated coke is as follows: pour 250 mL of a mixed solution of 2 mol / L H2SO4 and 1 mol / L HNO3 in a volume ratio of 1:1 into 40 g of activated coke, place at room temperature, stir at a speed of 180 r / min for 6 hours, and then filter; finally place in a drying oven at 105°C for drying to obtain modified activated coke; The preparation method of the composite additive is as follows: 20g of phosphogypsum and 30g of bentonite are naturally air-dried respectively, then 6g of humic acid is crushed and ground and passed through an 80-mesh sieve, the naturally air-dried phosphogypsum is crushed and ground and passed through a 35-mesh sieve, the naturally air-dried bentonite is crushed and ground and passed through a 40-mesh sieve, and then mixed to obtain the composite additive.
[0023] Comparative Example 2 A method for preparing a saline-alkali soil treatment and repair agent containing bamboo charcoal, specifically comprising the following preparation steps: Step 1: pretreat 35 g of titanium gypsum; Step 2: Mix the treated titanium gypsum with 5g of bamboo charcoal, grind and sieve them in sequence; Step 3: Add 8 g of activated coke and 13 g of composite additives, mix well, and obtain a saline-alkali soil treatment and repair agent containing bamboo charcoal; The preparation method of the composite additive is as follows: 20g of phosphogypsum and 30g of bentonite are naturally air-dried respectively, then 6g of humic acid is crushed and ground and passed through an 80-mesh sieve, the naturally air-dried phosphogypsum is crushed and ground and passed through a 35-mesh sieve, the naturally air-dried bentonite is crushed and ground and passed through a 40-mesh sieve, and then mixed to obtain the composite additive.
[0024] Comparative Example 3 A method for preparing a saline-alkali soil treatment and repair agent containing bamboo charcoal, specifically comprising the following preparation steps: Step 1: pretreat 35 g of titanium gypsum; Step 2: Mix the treated titanium gypsum with 5g of bamboo charcoal, grind and sieve them in sequence; Step 3: Add 8 g of modified activated coke and 13 g of composite additives, mix well, and obtain a saline-alkali soil treatment and restoration agent containing bamboo charcoal; The preparation method of modified activated coke is as follows: pour 250 mL of a mixed solution of 2 mol / L H2SO4 and 1 mol / L HNO3 in a volume ratio of 1:1 into 40 g of activated coke, place at room temperature, stir at a speed of 180 r / min for 6 hours, and then filter; finally place in a drying oven at 105°C for drying to obtain modified activated coke; The preparation method of the composite additive is as follows: 20g of phosphogypsum and 30g of bentonite are naturally air-dried respectively, the naturally air-dried phosphogypsum is crushed and ground and then passed through a 35-mesh sieve, the naturally air-dried bentonite is crushed and ground and then passed through a 40-mesh sieve, and then mixed to obtain the composite additive.
[0025] Soil sample preparation: Select 0-20 cm surface soil from saline-alkali land, air-dry the soil sample after taking it back, break it with a wooden tool, pass it through a 10-mesh sieve, weigh 2 kg of soil sample and mix it with the repair agent.
[0026] Determination of soil water retention rate: The soil water content was determined by drying method; soil was placed in an aluminum box (W1), weighed on a balance (W2) with an accuracy of 0.01 g, and then placed in a 105°C constant temperature drying oven to a constant weight, recorded as weight W3, soil water retention rate ( ) is calculated as: .
[0027] Mix the soil sample and the repair agent and pour them into the flowerpot, plant tea seedlings of the same variety and almost the same growth, trim the tea seedlings to the same height (15cm), and cultivate the potted plants in a greenhouse (keep the temperature, humidity, light and other environmental conditions consistent, and weed and water regularly).
[0028] like Figure 1 As shown in the figure, there are obvious attachments on the surface of the activated coke before modification, and the pores are not obvious. The activated coke after acid modification has obvious pores and the surface attachments are reduced, indicating that the activated coke modification process washes away the salt substances adsorbed on the surface of the activated coke and increases the pore structure of the activated coke.
[0029] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0031] 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 saline-alkali soil treatment and repair agent containing bamboo charcoal, characterized in that: The method comprises the following raw materials in parts by weight: 2 to 5 parts of bamboo charcoal, 5 to 8 parts of modified activated coke, 8 to 13 parts of composite additives, and 35 to 60 parts of titanium gypsum; The preparation method of the modified activated coke is: (1) Pour 250 mL of mixed acid solution into 40-50 g of activated coke, place at room temperature, and stir at a speed of 180-200 r / min for 6-8 h; (2) Filtration; (3) Finally, the product is dried in a drying oven at 105-110°C to obtain modified activated coke.
2. The saline-alkali soil treatment and repairing agent containing bamboo charcoal according to claim 1, characterized in that: The preparation method of the bamboo charcoal is as follows: the bamboo is washed with deionized water, dried and passed through a 30-40 mesh screen, and then placed in a tubular heating furnace, nitrogen is continuously passed through, the temperature is increased, and pyrolysis is performed for 1.8-2 hours, and then the bamboo charcoal is obtained by cooling to room temperature.
3. The saline-alkali soil treatment and repairing agent containing bamboo charcoal according to claim 2, characterized in that: The heating rate is 3-5°C / min, and the temperature is raised to 580-600°C.
4. The saline-alkali soil treatment and repairing agent containing bamboo charcoal according to claim 3, characterized in that: In (1), the mixed acid solution is prepared by mixing H2SO4 with a concentration of 2 mol / L and HNO3 with a concentration of 1 mol / L, and the volume ratio of H2SO4 to HNO3 is 1:
1.
5. The saline-alkali soil treatment and repairing agent containing bamboo charcoal according to claim 1, characterized in that: The preparation method of the composite auxiliary agent is as follows: 20 to 26 parts of phosphogypsum and 20 to 30 parts of bentonite are naturally air-dried respectively, and then 2.5 to 6 parts of humic acid, the naturally air-dried phosphogypsum and bentonite are crushed, ground, sieved and mixed respectively to obtain the composite auxiliary agent.
6. The saline-alkali soil treatment and repairing agent containing bamboo charcoal according to claim 5, characterized in that: in, Humic acid is passed through a 80-90 mesh sieve, phosphogypsum is passed through a 35-45 mesh sieve, and bentonite is passed through a 40-45 mesh sieve.
7. A method for preparing the saline-alkali soil treatment and repair agent containing bamboo charcoal according to claim 1, characterized in that: The specific preparation steps include: Step 1: pretreating titanium gypsum; Step 2: Mix the treated titanium gypsum and bamboo charcoal, grind and sieve them in sequence; Step 3: Add modified activated coke and composite additives and mix well to obtain a saline-alkali soil treatment and restoration agent containing bamboo charcoal.
8. The saline-alkali soil treatment and repairing agent containing bamboo charcoal according to claim 7, characterized in that: In the step 1, the specific pretreatment method of titanium gypsum is: after ultrasonic washing the titanium gypsum for 4 to 5 times, place it in a constant temperature drying oven at 105 to 110° C. and dry it for 2 to 2.2 hours, then grind it and pass it through a 20 to 30 mesh sieve.