CN112980455B - Preparation method of modified attapulgite water-retaining agent for saline-alkali soil - Google Patents
Preparation method of modified attapulgite water-retaining agent for saline-alkali soil Download PDFInfo
- Publication number
- CN112980455B CN112980455B CN202110246845.9A CN202110246845A CN112980455B CN 112980455 B CN112980455 B CN 112980455B CN 202110246845 A CN202110246845 A CN 202110246845A CN 112980455 B CN112980455 B CN 112980455B
- Authority
- CN
- China
- Prior art keywords
- water
- soil
- attapulgite
- retaining agent
- saline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Fertilizers (AREA)
Abstract
The invention belongs to the technical field of soil water-retaining agents, and particularly relates to a preparation method of a modified attapulgite water-retaining agent for saline-alkali soil. The attapulgite raw material is crushed and ground by a ball mill to obtain attapulgite powder, the attapulgite powder is subjected to alkali catalysis modification under the protection of nitrogen, the obtained alkali catalysis modified attapulgite powder is magnetized to obtain magnetic attapulgite powder, and then an initiator and a cross-linking agent are added to obtain the soil water-retaining agent for the saline-alkali soil. The modified attapulgite water-retaining agent can improve the properties of crop soil, such as soil hardening and the like, can also improve the physical and chemical properties of the soil, can well improve the utilization rate of water and fertilizer in agricultural production, reduce the loss of nutrients of the fertilizer, and increase the economic benefit of the agricultural production.
Description
Technical Field
The invention belongs to the technical field of soil water-retaining agents, and particularly relates to a preparation method of a modified attapulgite water-retaining agent for saline-alkali soil.
Background
The development of the water-splitting agriculture and the improvement of the water utilization rate are one of effective measures for guaranteeing the development of the agriculture in the arid region. The water-retaining agent is a chemical water-saving high-tech drought-resistant product which is developed rapidly in recent years. The water-retaining agent has the characteristics of rapid absorption and slow release of water, and can reduce the surface area of the culture substrate and the evaporation capacity of the substrate water. The water-retaining agent can store the gravity water which can not be continuously utilized by the plants, effectively increase the water holding capacity of the matrix and improve the water utilization rate. The salinization soil is one of the most common natural adversities in the plant growth process, and the salinization of the soil seriously limits the growth of plants, so that the yield of large fertile farmlands is reduced, and the land is gradually abandoned. Because the saline-alkali soil has the advantages of low organic matter content, poor physical and chemical properties and low water and fertilizer storage capacity, the water retention agent is added during the restoration of the ecological vegetation of the saline-alkali soil to realize the functions of water retention and soil moisture storage, the formation of soil aggregate structures, the reduction of water evaporation capacity and the prevention of secondary salinization.
Attapulgite is a non-metallic mineral resource, which is a special crystal with the properties of earth and stone. The attapulgite contains a plurality of layered and chain structures, and has the advantages of large specific area, good adsorbability, suspension property, slow release property and the like. The attapulgite clay also has nanochannels in itself, which makes it have better ion exchange capacity.
Before the invention is put forward, at present, water retention agents at home and abroad are mainly classified into 2 types, one type is acrylamide-acrylate cross-linked copolymer (polyacrylamide); another class is starch grafted acrylate cross-linked copolymers (sodium polyacrylate, polymethyl acrylate, ammonium polyacrylate, starch grafted acrylate). At present, the existing water-retaining agent applied to saline-alkali soil ecological vegetation restoration has the following problems: (1) the production cost is high, and the price of the water-retaining agent is high; (2) poor saline-alkali resistance, low gel strength and short service life. Therefore, the existing market lacks a special water-retaining agent suitable for saline-alkali soil under the geographical environment condition. The attapulgite is magnetized by utilizing high-efficiency load capacity and superparamagnetism, and then the functional groups on the surface of the attapulgite and glutamic acid are utilized to carry out chemical modification reaction, so as to prepare the modified attapulgite water-retaining agent with high adsorption capacity on nutrient substances and water. At present, there is no report that the adsorption capacity of attapulgite is improved by modifying and decorating the attapulgite to prepare the water-retaining agent, which is the innovation of the invention. The novel, efficient, safe, green and environment-friendly water-retaining agent of a new generation is rarely reported at home and abroad.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to design and provide a technical scheme of a preparation method of a modified attapulgite water-retaining agent for saline-alkali soil, the modified attapulgite water-retaining agent can improve the properties of crop soil, such as soil hardening, and the like, can also improve the physical and chemical properties of the soil, can well improve the utilization rate of water and fertilizer in agricultural production, reduce the loss of nutrients of the fertilizer, and increase the economic benefit of the agricultural production. The modified attapulgite water-retaining agent is applied, and can slowly release absorbed rainwater and nutrients of fertilizer under the condition of water shortage of crops, so that the crops can well grow and develop under a certain drought degree. The water-retaining agent prepared by adopting the modified attapulgite is a novel, high-efficiency, safe, green and environment-friendly water-retaining agent of a new generation.
The preparation method of the modified attapulgite water-retaining agent for saline-alkali soil is characterized by comprising the following process steps:
1) crushing and grinding the attapulgite raw material to the particle size of 100-150 mu m by a ball mill;
2) pyrolyzing the attapulgite powder obtained in the step 1) under the protection of nitrogen, soaking a pyrolysis product in saturated KOH solution, drying, soaking a carbonized product in the saturated KOH solution under the protection of nitrogen, and activating at high temperature to obtain alkali-catalyzed modified attapulgite powder;
3) stirring the base-catalyzed modified attapulgite powder obtained in the step 2), and adding magnetic nano Fe3O4And glutamic acid are dispersed in an ultrasonic oscillator to obtain a magnetic attapulgite mixture;
4) dropwise adding a polyethylene glycol solution into the magnetic attapulgite mixture obtained in the step 3) to form a colloidal mixture, controlling the temperature, oscillating and stirring, performing magnetic separation, washing with deionized water, freezing overnight in a refrigerator, drying under vacuum, drying, and uniformly grinding to obtain magnetic attapulgite powder;
5) mixing acrylic acid and charcoal powder uniformly, adding water to control the temperature of the material to be 85-95 ℃, and carrying out heat preservation treatment for 2-4h to obtain a paste. And (3) transferring the paste into a reaction kettle, introducing nitrogen, adding an initiator and a cross-linking agent, continuously adding N, N-dimethylacrylamide and the magnetic attapulgite powder obtained in the step 4), stirring, heating to 50-65 ℃, carrying out heat preservation reaction for 4-8h, cooling and drying after the reaction is finished, and finally crushing to 100-fold sand of 150 mu m to obtain the soil water-retaining agent for the saline-alkali soil. .
The preparation method of the modified attapulgite water-retaining agent for saline-alkali soil is characterized in that the length or the diameter of the crushed attapulgite in the step 1) is not more than 150 mu m.
The preparation method of the modified attapulgite water-retaining agent for saline-alkali soil is characterized in that in the step 2), attapulgite is pyrolyzed at the temperature of 55-65 ℃ under the protection of nitrogen, a pyrolysis product is soaked in saturated KOH solution, dried, then a carbonization product is soaked in the saturated KOH solution under the protection of nitrogen, and activation is carried out at the temperature of 780-820 ℃ to obtain alkali-catalyzed modified attapulgite powder.
The preparation method of the modified attapulgite water-retaining agent for saline-alkali soil is characterized in that in the step 3), the modified attapulgite powder is stirred for 1-3h under the conditions of 1100-1600 r/min.
The preparation method of the modified attapulgite water-retaining agent for saline-alkali soil is characterized in that 550 parts by weight of the modified attapulgite powder with alkali catalysis in the step 3) and magnetic nano Fe3O41-6 parts by weight of glutamic acid and 15-35 parts by weight of glutamic acid are mixed and dispersed in an ultrasonic oscillator for 1-2 hours to obtain the magnetic attapulgite mixture.
The preparation method of the modified attapulgite water-retaining agent for saline-alkali soil is characterized in that in the step 4), 30mL of 4-8% polyethylene glycol solution is dripped into every 5g of magnetic attapulgite mixture to form a colloidal mixture, the colloidal mixture is subjected to oscillating stirring at the temperature of 65-85 ℃ and 1600r/min of 1100-.
The preparation method of the modified attapulgite water-retaining agent for saline-alkali soil is characterized in that the mixing ratio of the acrylic acid and the charcoal powder in the step 5) is as follows by weight: 1: 100.
the preparation method of the modified attapulgite water-retaining agent for saline-alkali soil is characterized in that N, N-dimethylacrylamide is added in the step 5) and the magnetic attapulgite powder obtained in the step 4) is prepared according to the following weight parts: 1: 200.
the preparation method of the modified attapulgite water-retaining agent for saline-alkali soil is reasonable in design, the attapulgite is magnetized by utilizing high-efficiency load capacity and superparamagnetism, then the functional groups on the surface of the attapulgite and glutamic acid are utilized to carry out chemical modification reaction, so that the modified attapulgite water-retaining agent with higher adsorption capacity on nutrient substances and water is prepared, and the prepared new-generation water-retaining agent is good in water-retaining property, novel, high-efficiency, safe, green and environment-friendly, and is the preferred for developing green organic agriculture. The invention can improve the properties of crop soil, such as soil hardening and the like, can also improve the physical and chemical properties of the soil, can well improve the utilization rate of water and fertilizer in agricultural production, reduce the loss of nutrients and increase the economic benefit of the agricultural production.
Drawings
FIG. 1 is a water accumulation leaching rate (%);
fig. 2 shows the nitrogen cumulative leaching rate (%).
Detailed Description
The present invention is further illustrated by the following examples.
Example 1
A preparation method of a modified attapulgite water-retaining agent for saline-alkali soil comprises the following steps:
1) grinding the attapulgite raw material to the particle size of 120-150 mu m by a ball mill, wherein the length or the diameter of the crushed attapulgite is not more than 150 mu m;
2) pyrolyzing attapulgite powder obtained in the step 1) at 55 ℃ under the protection of nitrogen, soaking a pyrolysis product in saturated KOH solution, drying, soaking a carbonized product in the saturated KOH solution under the protection of nitrogen, and activating at 780 ℃ to obtain alkali-catalyzed modified attapulgite powder;
3) stirring the alkali-catalyzed modified attapulgite powder obtained in the step 2) for 1h at 1100r/min, and modifying the attapulgite powder 450 according to the alkali catalysisMagnetic nano Fe3O46 parts by weight of glutamic acid and 35 parts by weight of glutamic acid are mixed and dispersed in an ultrasonic oscillator for 2 hours to obtain a magnetic attapulgite mixture;
4) dropwise adding 30mL of 8% polyethylene glycol solution into every 5g of the magnetic attapulgite mixture in step 3) to form a colloidal mixture, stirring at 65-85 ℃ for 3h under oscillation at 1600r/min, performing magnetic separation, washing with deionized water for 3 times, freezing in a refrigerator overnight, drying under vacuum, drying at 65-85 ℃, and uniformly grinding to obtain the magnetic attapulgite;
5) firstly, mixing acrylic acid and charcoal powder in parts by weight: 1: 100, uniformly mixing, adding water to control the temperature of the materials to be 95 ℃, and carrying out heat preservation treatment for 4 hours to obtain a pasty material. Transferring the paste into a reaction kettle, introducing nitrogen, adding an initiator and a crosslinking agent, and then, mixing the following components in parts by weight: 1: 200, continuously adding N, N-dimethylacrylamide and the magnetic attapulgite powder obtained in the step 4), stirring and heating to 65 ℃, then carrying out heat preservation reaction for 8 hours, cooling and drying after the reaction is finished, and finally crushing to 100-150 mu m to obtain the soil water-retaining agent for the saline-alkali soil.
Example 2
A preparation method of a modified attapulgite water-retaining agent for saline-alkali soil comprises the following steps:
1) grinding the attapulgite raw material to the particle size of 100-150 mu m by a ball mill, wherein the length or the diameter of the crushed attapulgite is not more than 150 mu m;
2) pyrolyzing attapulgite powder obtained in the step 1) at 65 ℃ under the protection of nitrogen, soaking a pyrolysis product in saturated KOH solution, drying, soaking a carbonized product in the saturated KOH solution under the protection of nitrogen, and activating at 820 ℃ to obtain alkali-catalyzed modified attapulgite powder;
3) stirring the alkali-catalyzed modified attapulgite powder obtained in the step 2) for 3 hours at 1600r/min, and mixing 550 parts by weight of the alkali-catalyzed modified attapulgite powder and magnetic nano Fe3O41 part by weight of glutamic acid and 35 parts by weight of glutamic acid are mixed and dispersed in an ultrasonic oscillator for 2 hours to obtain a magnetic attapulgite mixture;
4) dropwise adding 30mL of 4% polyethylene glycol solution into every 5g of the magnetic attapulgite mixture in step 3) to form a colloidal mixture, oscillating and stirring at the temperature of 65 ℃ at 1100r/min for 3h, performing magnetic separation, washing with deionized water for 3 times, freezing in a refrigerator overnight, drying under vacuum, drying at 85 ℃, and uniformly grinding to obtain the magnetic attapulgite;
5) firstly, mixing acrylic acid and charcoal powder in parts by weight: 1: 100, adding water to control the temperature of the materials to be 85-95 ℃, and carrying out heat preservation treatment for 2-4 hours to obtain a paste. Transferring the paste into a reaction kettle, introducing nitrogen, adding an initiator and a crosslinking agent, and then, mixing the following components in parts by weight: 1: 200, continuously adding N, N-dimethylacrylamide and the magnetic attapulgite powder obtained in the step 4), stirring and heating to 65 ℃, then carrying out heat preservation reaction for 6 hours, cooling and drying after the reaction is finished, and finally crushing to 100-150 mu m to obtain the soil water-retaining agent for the saline-alkali soil.
Example 3
A preparation method of a modified attapulgite water-retaining agent for saline-alkali soil comprises the following steps:
1) grinding the attapulgite raw material to the particle size of 100-150 mu m by a ball mill, wherein the length or the diameter of the crushed attapulgite is not more than 150 mu m;
2) pyrolyzing attapulgite powder obtained in the step 1) at the temperature of 60 ℃ under the protection of nitrogen, soaking a pyrolysis product in saturated KOH solution, drying, soaking a carbonized product in the saturated KOH solution under the protection of nitrogen, and activating at 800 ℃ to obtain alkali-catalyzed modified attapulgite powder;
3) stirring the alkali-catalyzed modified attapulgite powder obtained in the step 2) for 2 hours at 1500r/min, and mixing 500 parts by weight of the alkali-catalyzed modified attapulgite powder and magnetic nano Fe3O45 parts by weight of glutamic acid and 30 parts by weight of glutamic acid are mixed and dispersed in an ultrasonic oscillator for 1.5 hours to obtain a magnetic attapulgite mixture;
4) dropwise adding 30mL of 6% polyethylene glycol solution into every 5g of the magnetic attapulgite mixture in step 3) to form a colloidal mixture, oscillating and stirring at the temperature of 70 ℃ at 1500r/min for 2h, performing magnetic separation, washing with deionized water for 3 times, freezing in a refrigerator overnight, drying under vacuum, drying at 80 ℃, and uniformly grinding to obtain the magnetic attapulgite;
5) firstly, mixing acrylic acid and charcoal powder in parts by weight: 1: 100, adding water to control the temperature of the materials to be 85-95 ℃, and carrying out heat preservation treatment for 3 hours to obtain a paste. Transferring the paste into a reaction kettle, introducing nitrogen, adding an initiator and a crosslinking agent, and then, mixing the following components in parts by weight: 1: 200, continuously adding N, N-dimethylacrylamide and the magnetic attapulgite powder obtained in the step 4), stirring and heating to 60 ℃, then carrying out heat preservation reaction for 6 hours, cooling and drying after the reaction is finished, and finally crushing to 100-150 mu m to obtain the soil water-retaining agent for the saline-alkali soil.
Test example:
in order to verify the test effect of the water-retaining agent, the test shows the influence of the preparation of different water-retaining agents by the controlled release fertilizer on the water and fertilizer retention capacity of soil according to the type of the water-retaining agent in China.
1. Test material
The tested fertilizers were: resin coated urea (particle size 2-5 mm, N-P)2O5-K2O: 42-0-0), resin coated diammonium phosphate (particle size 2-5 mm, N-P)2O5-K2O: 17.3-43.8-0), resin coated potassium chloride (particle size 2-5 mm, N-P)2O5-K2O：0-0-53)。
The test water-retaining agent is: a commercial water-retaining agent (particle size 3-5 mm, SRdw: 354.8g/g, SRns: 35.4 g/g).
The indoor soil column simulation test is carried out in a test base of a Chinese rice institute, test soil is collected from a peripheral farmland plough layer, the soil type is brown soil, the soil is a common simply-cultivated wet leaching soil subclass in Chinese soil system classification, the texture is loam, and the basic physicochemical properties are as follows: the organic matter content is 31.7g/kg, the total nitrogen content is 2.3g/kg, the alkaline hydrolysis nitrogen content is 142.5mg/kg, the available phosphorus content is 21.6mg/kg, the quick-acting potassium content is 138mg/kg, the pH value is 6.73 (water-soil ratio is 2.5: 1), and the conductivity is 186.5 mu S/cm (water-soil ratio is 5: 1).
2. Design of experiments
The method of simulating eluviation by using the soil column is adopted to research the influence of different water-retaining agents on the water and fertilizer retention capacity and the soil property of the soil, the full blank is respectively set as the control treatment, the common commodity water-retaining agent and the water-retaining agent in the embodiment 1 are respectively set as the test treatment, and the three times of the repeated treatments are set. The amount of fertilizer applied to each column was consistent except for the total void, and the specific water retention agents and fertilizer application rates are listed in table 1.
TABLE 1 soil column simulated leaching test fertilizing amount
| Treatment of | Amount of fertilizer (g) | Water-retaining agent (g) |
| |
0 | 0 |
| Commercial water-retaining agent (T1) | 15 | 8 |
| Example 1 Water-retaining agent (T2) | 15 | 6 |
3. The method for filling and irrigating the soil column comprises the following steps:
the simulated eluviation soil column is made of polyvinyl chloride, the inner diameter is 7.0cm, the height is 60cm, the inner wall of the simulated eluviation soil column is scraped to prevent side seepage, and 3 layers of 10-mesh gauze are used for bottom sealing to prevent soil leakage. Weighing 1980g of test soil passing through a 2mm sieve, placing the test soil in a soil column, compacting the soil column in a surrounding manner, and weighing the test soil and fertilizer in equal amountsOr the water-retaining agent is mixed evenly and then put into a soil column device to be compacted in a surrounding way (the measured soil volume weight is 1.24 g/cm)3) And actually measuring the height of the soil column to be 40cm after adding water. Coarse quartz sand (1cm) cleaned by dilute hydrochloric acid is placed on the surface of the soil to prevent the surface soil layer from being disturbed when water is added, and the volatilization of water is reduced. And (3) after 24h of fertilization, simulated irrigation and leaching are carried out on the soil column by using distilled water, the volume is equal to 100% of the total pore volume of the soil, and a leaching water sample is taken when no obvious leakage exists, and the simulated irrigation is carried out for 4 times.
Measuring the volume of the leachate by using a measuring cylinder, measuring the total nitrogen in the leachate by using a digestion-Kjeldahl method, measuring the total phosphorus by using a digestion-molybdenum-antimony colorimetric method, measuring the total potassium by using a flame photometry method, and measuring the NO by using a method of measuring the total potassium3 --N and NH4 +-N was measured using an AA3 model flow injection analyzer and Ca in the leachate was measured using an atomic absorption spectrophotometer (AA-7000, Shimadzu, Japan)2+、Mg2+Ion content. And calculating the leaching rate of the nutrients in the leaching solution.
4. Results of the study
The soil conditioner optimizes the physical and chemical properties of soil by regulating and controlling parameters such as soil moisture adsorption capacity, porosity and the like, and can improve the Ca content in the soil2+Content is used for replacing Na in soil solution+The content of Na in the soil solution is further reduced+. The soil conditioner can slightly reduce the pH value, and is suitable for the slightly acid environment for rice growth; the conductivity of the soil is reduced, so that the soil micro-domain environment is optimized; the soil volume weight is reduced, and the environment is acidified and the soil is heavy and barren. The soil conditioner can also obviously reduce soil exchangeable Na+With Cl-And (4) content. T1 treated Na compared to control+、Cl-The content is respectively reduced by 16.7 percent and 30.8 percent, and Na treated by T2+、Cl-The content is respectively reduced by 27.8 percent and 50.0 percent. The soil conditioner developed by the patent can improve the water and fertilizer retention capacity of soil, reduce the content of soluble salt ions in the soil and further achieve the aim of improving the soil.
TABLE 1 basic physicochemical Properties of soil
The water leaching loss rate can directly reflect the water retention performance of the soil conditioner. Compared with CK, the soil moisture leaching rate of the conventional soil conditioner is reduced by 3.71 percentage points, and the soil moisture leaching rate of the soil conditioner treated by the soil conditioner developed by the patent is reduced by 4.33 percentage points (figure 1). The soil conditioner can obviously improve the water holding performance of the soil.
The cumulative leaching rate of soil nitrogen is closely related to the leaching rate of soil moisture, and the leaching rate of nitrogen increases with the increase of irrigation water (fig. 2). The nitrogen leaching rate of the control treatment is obviously increased along with the increase of the irrigation water quantity, and the cumulative leaching rate of the soil nitrogen under the irrigation water quantity of 40ml continuously has a linear increasing relationship. The accumulated leaching rate of the nitrogen treated by the soil conditioner is in an S-shaped growth relation along with the increase of the irrigation water volume, the irrigation water volume exceeds 30ml, the accumulated leaching rate of the nitrogen in the soil is in a stable growth state, and particularly the accumulated loss rate of the nitrogen treated by the soil conditioner developed by the patent is the lowest. The soil conditioner developed by the patent has better water and fertilizer holding performance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A preparation method of a modified attapulgite water-retaining agent for saline-alkali soil is characterized by comprising the following process steps:
1) crushing and grinding the attapulgite raw material to the particle size of 100-150 mu m by a ball mill;
2) pyrolyzing the attapulgite powder obtained in the step 1) under the protection of nitrogen, soaking a pyrolysis product in saturated KOH solution, drying, soaking a carbonized product in the saturated KOH solution under the protection of nitrogen, and activating at high temperature to obtain alkali-catalyzed modified attapulgite powder;
3) stirring the base-catalyzed modified attapulgite powder obtained in the step 2), and adding magnetic nano Fe3O4And glutamic acid are dispersed in an ultrasonic oscillator to obtain a magnetic attapulgite mixture, wherein the attapulgite powder modified by alkali catalysis comprises 550 parts by weight of 450-grade magnetic nano Fe3O41-6 parts by weight of glutamic acid and 15-35 parts by weight of glutamic acid are mixed, and the dispersion time is 1-2 h;
4) dripping 30mL of 4-8% polyethylene glycol solution into every 5g of the magnetic attapulgite mixture obtained in the step 3) to form a colloidal mixture, oscillating and stirring at the temperature of 65-85 ℃ for 1-3h at 1100-1600r/min, carrying out magnetic separation, washing for 3 times by deionized water, freezing overnight in a refrigerator, drying under vacuum, drying at the temperature of 65-85 ℃, and uniformly grinding to obtain magnetic attapulgite powder;
5) uniformly mixing acrylic acid and charcoal powder, adding water to control the temperature of the materials to be 85-95 ℃, and carrying out heat preservation treatment for 2-4h to obtain a paste; and (3) moving the paste into a reaction kettle, introducing nitrogen, adding an initiator and a cross-linking agent, continuously adding N, N-dimethylacrylamide and the magnetic attapulgite powder obtained in the step 4), stirring, heating to 50-65 ℃, carrying out heat preservation reaction for 4-8h, cooling and drying after the reaction is finished, and finally crushing to 100-fold sand 150 mu m to obtain the soil water-retaining agent for the saline-alkali soil.
2. The preparation method of the modified attapulgite water-retaining agent for saline-alkali soil according to claim 1, characterized in that the length or diameter of the crushed attapulgite in the step 1) is not more than 150 μm.
3. The preparation method of the modified attapulgite water-retaining agent for saline-alkali soil as claimed in claim 1, wherein in step 2), the attapulgite powder is pyrolyzed at 55-65 ℃ under the protection of nitrogen, the pyrolysis product is soaked in saturated KOH solution, dried, and then the carbonized product is soaked in saturated KOH solution under the protection of nitrogen, and activated at 780-820 ℃ to obtain the alkali-catalyzed modified attapulgite powder.
4. The method for preparing the modified attapulgite water-retaining agent for saline-alkali soil as claimed in claim 1, wherein the modified attapulgite powder is stirred for 1-3h under the conditions of 1100-1600r/min in the step 3).
5. The preparation method of the modified attapulgite water-retaining agent for saline-alkali soil as claimed in claim 1, wherein the mixing ratio of the acrylic acid and the charcoal powder in the step 5) is as follows: 1: 100.
6. the preparation method of the modified attapulgite water-retaining agent for saline-alkali soil as claimed in claim 1, wherein the N, N-dimethylacrylamide is added in the step 5) and the magnetic attapulgite powder obtained in the step 4) is prepared in the following proportion by weight: 1: 200.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110246845.9A CN112980455B (en) | 2021-03-05 | 2021-03-05 | Preparation method of modified attapulgite water-retaining agent for saline-alkali soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110246845.9A CN112980455B (en) | 2021-03-05 | 2021-03-05 | Preparation method of modified attapulgite water-retaining agent for saline-alkali soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112980455A CN112980455A (en) | 2021-06-18 |
| CN112980455B true CN112980455B (en) | 2021-10-22 |
Family
ID=76353168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110246845.9A Active CN112980455B (en) | 2021-03-05 | 2021-03-05 | Preparation method of modified attapulgite water-retaining agent for saline-alkali soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112980455B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116463129B (en) * | 2023-05-06 | 2024-03-05 | 江苏省农业科学院 | Multi-effect soil conditioner |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428809A (en) * | 2008-11-26 | 2009-05-13 | 合肥工业大学 | Method for nano-attapulgite stone clay grain surface magnetization modification |
| CN102181294A (en) * | 2011-04-01 | 2011-09-14 | 甘肃源岗农林开发有限公司 | Water-retaining agent material for greening deserts and preparation method thereof |
| CN105802638A (en) * | 2016-05-16 | 2016-07-27 | 农业部规划设计研究院 | Biological-carbon-based water retaining agent and preparing method thereof |
| CN107466822A (en) * | 2017-07-27 | 2017-12-15 | 中国水稻研究所 | A kind of method that rice light soil-less seedling raising ground substance is prepared using magnetic rice straw |
| CN107522812A (en) * | 2017-09-06 | 2017-12-29 | 河北工程大学 | It is a kind of can slow-release nutrient bone meal Quito function water-loss reducer preparation method |
| CN110607177A (en) * | 2019-10-24 | 2019-12-24 | 成都新柯力化工科技有限公司 | Soil water-retaining agent for saline-alkali soil and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009050775A1 (en) * | 2007-10-15 | 2009-04-23 | Ibiden Co., Ltd. | Method for manufacturing honeycomb structure |
| CN110093165B (en) * | 2019-05-05 | 2021-06-25 | 宜宾学院 | Preparation method and application of low-grade attapulgite modified material |
-
2021
- 2021-03-05 CN CN202110246845.9A patent/CN112980455B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428809A (en) * | 2008-11-26 | 2009-05-13 | 合肥工业大学 | Method for nano-attapulgite stone clay grain surface magnetization modification |
| CN102181294A (en) * | 2011-04-01 | 2011-09-14 | 甘肃源岗农林开发有限公司 | Water-retaining agent material for greening deserts and preparation method thereof |
| CN105802638A (en) * | 2016-05-16 | 2016-07-27 | 农业部规划设计研究院 | Biological-carbon-based water retaining agent and preparing method thereof |
| CN107466822A (en) * | 2017-07-27 | 2017-12-15 | 中国水稻研究所 | A kind of method that rice light soil-less seedling raising ground substance is prepared using magnetic rice straw |
| CN107522812A (en) * | 2017-09-06 | 2017-12-29 | 河北工程大学 | It is a kind of can slow-release nutrient bone meal Quito function water-loss reducer preparation method |
| CN110607177A (en) * | 2019-10-24 | 2019-12-24 | 成都新柯力化工科技有限公司 | Soil water-retaining agent for saline-alkali soil and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| Attapulgite–Fe3O4 magnetic nanoparticles via co-precipitation technique;Yushan Liu等;《Applied Surface Science》;20080709;第255卷(第5期);第2020-2025页 * |
| 凹凸棒石的碱酸改性及除磷效果探究;张建民等;《西安工程大学学报》;20131231;第27卷(第6期);第760-763页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112980455A (en) | 2021-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102925162B (en) | Multifunctional soil conditioner and preparation method thereof | |
| CN103159571B (en) | A kind of soil water-reataining fertilizer-keeping agent and preparation method thereof | |
| CN104355786A (en) | Special controllable slow-release organic fertilizer for rice and preparation method of organic fertilizer | |
| CN104610974A (en) | Preparation method and application method of saline-alkali soil conditioner | |
| CN1288116C (en) | Water-retaining slow-releasnig fertilizer | |
| CN109429996B (en) | Organic nutrient soil | |
| CN103408379A (en) | Attapulgite and zinc lignosulphonate-based interpenetrating network-type water-retention and slow-release zinc fertilizer | |
| CN103897707A (en) | Farmland soil conditioner in arid and semi-arid regions | |
| CN111303899A (en) | Environment-responsive soil conditioner and preparation method thereof | |
| CN111377780A (en) | Natural sodium bentonite soil conditioner and preparation method thereof | |
| Cao | Research and application of peat in agriculture | |
| CN112980455B (en) | Preparation method of modified attapulgite water-retaining agent for saline-alkali soil | |
| CN111393222A (en) | Soil conditioner and preparation method and application thereof | |
| CN115724698A (en) | Acidic soil conditioner and preparation method thereof | |
| CN114231292B (en) | Bentonite-based plateau soil modifier and application thereof | |
| CN112425479A (en) | Rice carbon-based filter cake matrix and preparation method thereof | |
| CN116584348A (en) | Moss spray-seeding matrix for ecological restoration and preparation method thereof | |
| CN109971488B (en) | Paddy field soil cadmium pollution passivator and preparation method and application thereof | |
| CN107739614A (en) | It is a kind of can restoration of soil polluted by heavy metal conditioner preparation and its application | |
| CN109362529B (en) | Protective material applied to mine high slope | |
| CN103843488A (en) | Method for constructing plow layer soil on stony desertification ground surface by using heavy-metal polluted bottom mud | |
| CN114804959A (en) | Preparation method of compound fertilizer with water retention and fertilizer retention functions | |
| CN110387239B (en) | Soil conditioner for fly ash land and preparation method and soil conditioning method thereof | |
| CN113089691A (en) | Landscape reconstruction-based high and steep hard slope restoration system and restoration method thereof | |
| CN108251124B (en) | Saline-alkali soil conditioner and saline-alkali soil improvement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |