CN113754485A - Composite biochar-based carrier with pesticide slow-release performance and preparation method thereof - Google Patents
Composite biochar-based carrier with pesticide slow-release performance and preparation method thereof Download PDFInfo
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- CN113754485A CN113754485A CN202110996845.0A CN202110996845A CN113754485A CN 113754485 A CN113754485 A CN 113754485A CN 202110996845 A CN202110996845 A CN 202110996845A CN 113754485 A CN113754485 A CN 113754485A
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- biochar
- corn starch
- based carrier
- pesticide
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Classifications
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
Abstract
The invention relates to the field of agriculture, in particular to a composite biochar-based carrier with pesticide slow-release performance and a preparation method thereof, wherein the composite biochar-based carrier is mainly prepared from the following raw materials in parts by weight: 30-50 parts of modified biochar, 10-20 parts of nano corn starch, 10-20 parts of mesoporous silica nanoparticles, 10-20 parts of bentonite and 5-10 parts of organic silicon polyoxyethylene ether compound. The carrier obtained by the invention has the characteristics of large specific surface area, large adsorption capacity and strong adsorption capacity and chelating capacity, can adsorb pesticides in pores to realize slow release, and is beneficial to continuous absorption and utilization of crops. Can obviously improve the utilization rate of the pesticide, thereby achieving the purpose of reducing the application and improving the efficiency of the pesticide.
Description
Technical Field
The invention relates to the field of agriculture, in particular to a composite biochar-based carrier with pesticide slow-release performance and a preparation method thereof.
Background
The invention and the use of the pesticide play a role in no substitution for guaranteeing and promoting agricultural production, meanwhile, the pollution to the environment is not negligible due to the large use of the pesticide, the problem of pesticide residue in soil and crops also becomes a research hotspot in the field of food safety and a most concerned problem of consumers, and the technical research and development of pesticide application reduction and synergism aiming at different planting systems are necessary to create a novel environment-friendly pesticide.
The pesticide Carrier (Carrier) is an inert substance loaded or diluted with pesticide in a pesticide preparation, mainly comprises diatomite, kaolin, talcum powder, white carbon black, bentonite, light calcium carbonate and the like at present, has excellent characteristics such as small density, micropores, strong adsorption performance, good fluidity, good environmental compatibility, easy crushing, certain water absorption rate, certain viscosity and the like, and has the generally poor adsorption capacity and selectivity.
The biomass charcoal prepared by using biomass as a raw material has the characteristics of no pollution, high absorption capacity, renewability and the like, and becomes one of new materials with the most development potential. Biochar has unique properties: large surface area, porous structure, and abundant functional groups on the surface, which provides possibility for wide application (especially as pesticide carrier).
Disclosure of Invention
The invention aims to provide a composite biochar-based carrier with pesticide slow-release performance and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: a composite biochar-based carrier with pesticide slow-release performance is mainly prepared from the following raw materials in parts by weight: 30-50 parts of modified biochar, 10-20 parts of nano corn starch, 10-20 parts of mesoporous silica nanoparticles, 10-20 parts of bentonite and 5-10 parts of organic silicon polyoxyethylene ether compound.
Preferably, the feed is mainly prepared from the following raw materials in parts by weight: 30 parts of modified biochar, 10 parts of nano corn starch, 10 parts of mesoporous silicon oxide nanoparticles, 10 parts of bentonite and 5 parts of organic silicon polyoxyethylene ether compound.
Preferably, the feed is mainly prepared from the following raw materials in parts by weight: 50 parts of modified biochar, 20 parts of nano corn starch, 20 parts of mesoporous silicon oxide nanoparticles, 20 parts of bentonite and 10 parts of organic silicon polyoxyethylene ether compound.
Preferably, the feed is mainly prepared from the following raw materials in parts by weight: 40 parts of modified biochar, 15 parts of nano corn starch, 15 parts of mesoporous silicon oxide nanoparticles, 15 parts of bentonite and 7.5 parts of organic silicon polyoxyethylene ether compound.
Further, the modified biochar is prepared by the following method: steam explosion crushing is carried out on bamboo and wood chips, the bamboo and wood chips are pyrolyzed for 2-3 hours at the temperature of 600-700 ℃ under the protection of nitrogen, and then the bamboo and wood chips are ultrasonically dispersed in 15 times of water according to the mass ratio of 1: 2-3, adding a proper amount of beta-cyclodextrin-polyglutamic acid, performing ultrasonic dispersion for 10min, adjusting the pH value to be neutral, drying, and grinding to obtain the modified charcoal.
The invention also provides a preparation method of the composite biochar-based carrier with pesticide slow-release performance, which comprises the following steps:
s1, ultrasonically dispersing the weighed nano corn starch in 5 times of water to form a nano corn starch suspension;
s2, sequentially ultrasonically dispersing the weighed mesoporous silica nano particles and organic silicon polyoxyethylene ether compound in the nano corn starch suspension to obtain a mixed solution;
s3, mixing and stirring the weighed modified biochar and bentonite uniformly, mixing the mixture with the mixed solution, stirring uniformly, drying until the water content is lower than 10%, and granulating to obtain the modified biochar.
The invention has the following beneficial effects:
1) the obtained carrier has the characteristics of large specific surface area, large adsorption capacity and strong adsorption capacity and chelating capacity, can adsorb pesticides in pores to realize slow release, and is beneficial to continuous absorption and utilization of crops;
2) the utilization rate of the pesticide can be obviously improved, so that the purpose of reducing the application and improving the efficiency of the pesticide is achieved;
3) can obviously improve the drug loading rate and the encapsulation rate of the pesticide, thereby improving the release and slow performance of the pesticide.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
A composite biochar-based carrier with pesticide slow-release performance is prepared by the following steps:
s1, weighing the following components in parts by weight: 30 parts of modified biochar, 10 parts of nano corn starch, 10 parts of mesoporous silicon oxide nanoparticles, 10 parts of bentonite and 5 parts of organic silicon polyoxyethylene ether compound;
s2, ultrasonically dispersing the weighed nano corn starch in 5 times of water to form a nano corn starch suspension;
s3, sequentially ultrasonically dispersing the weighed mesoporous silica nano particles and organic silicon polyoxyethylene ether compound in the nano corn starch suspension to obtain a mixed solution;
s4, mixing and stirring the weighed modified biochar and bentonite uniformly, mixing the mixture with the mixed solution, stirring uniformly, drying until the water content is lower than 10%, and granulating to obtain the modified biochar.
In this example, the modified biochar was prepared by the following method: steam explosion crushing bamboo wood chips, pyrolyzing the bamboo wood chips for 3 hours at 600 ℃ under the protection of nitrogen, and ultrasonically dispersing the bamboo wood chips in 15 times of water according to the mass ratio of 1: 2, adding a proper amount of beta-cyclodextrin-polyglutamic acid, performing ultrasonic dispersion for 10min, adjusting the pH value to be neutral, drying, and grinding to obtain the modified biochar.
Example 2
A composite biochar-based carrier with pesticide slow-release performance is prepared by the following steps:
s1, weighing the following components in parts by weight: 50 parts of modified biochar, 20 parts of nano corn starch, 20 parts of mesoporous silicon oxide nanoparticles, 20 parts of bentonite and 10 parts of organic silicon polyoxyethylene ether compound;
s2, ultrasonically dispersing the weighed nano corn starch in 5 times of water to form a nano corn starch suspension;
s3, sequentially ultrasonically dispersing the weighed mesoporous silica nano particles and organic silicon polyoxyethylene ether compound in the nano corn starch suspension to obtain a mixed solution;
s4, mixing and stirring the weighed modified biochar and bentonite uniformly, mixing the mixture with the mixed solution, stirring uniformly, drying until the water content is lower than 10%, and granulating to obtain the modified biochar.
In this example, the modified biochar was prepared by the following method: steam explosion crushing of bamboo and wood chips, pyrolysis at 700 ℃ for 2h under the protection of nitrogen, ultrasonic dispersion in 15 times of water according to the mass ratio of 1: 3, adding a proper amount of beta-cyclodextrin-polyglutamic acid, performing ultrasonic dispersion for 10min, adjusting the pH value to be neutral, drying, and grinding to obtain the modified biochar.
Example 3
A composite biochar-based carrier with pesticide slow-release performance is prepared by the following steps:
s1, weighing the following components in parts by weight: 40 parts of modified biochar, 15 parts of nano corn starch, 15 parts of mesoporous silicon oxide nanoparticles, 15 parts of bentonite and 7.5 parts of organic silicon polyoxyethylene ether compound;
s2, ultrasonically dispersing the weighed nano corn starch in 5 times of water to form a nano corn starch suspension;
s3, sequentially ultrasonically dispersing the weighed mesoporous silica nano particles and organic silicon polyoxyethylene ether compound in the nano corn starch suspension to obtain a mixed solution;
s4, mixing and stirring the weighed modified biochar and bentonite uniformly, mixing the mixture with the mixed solution, stirring uniformly, drying until the water content is lower than 10%, and granulating to obtain the modified biochar.
In this example, the modified biochar was prepared by the following method: steam explosion crushing bamboo wood chips, pyrolyzing at 650 ℃ for 2.5 hours under the protection of nitrogen, and ultrasonically dispersing in 15 times of water according to the mass ratio of 1: 2.5, adding a proper amount of beta-cyclodextrin-polyglutamic acid, performing ultrasonic dispersion for 10min, adjusting the pH value to be neutral, drying, and grinding to obtain the modified charcoal.
And (3) detection results:
cyhalothrin and acetamiprid are used as test objects to determine the drug loading rate and the encapsulation rate of the carrier, and the results are shown in the following table.
The wheat is taken as a test object, the reduced application condition of the pesticide is measured, and the results are as follows: compared with the traditional pesticide application mode, the method can reduce about 20% of pesticides, has good effect of preventing plant diseases and insect pests, increases the yield of wheat per mu by about 11.37%, and has remarkable economic benefit.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (6)
1. The composite biochar-based carrier with pesticide slow-release performance is characterized by being mainly prepared from the following raw materials in parts by weight: 30-50 parts of modified biochar, 10-20 parts of nano corn starch, 10-20 parts of mesoporous silica nanoparticles, 10-20 parts of bentonite and 5-10 parts of organic silicon polyoxyethylene ether compound.
2. The composite biochar-based carrier with pesticide slow-release performance as claimed in claim 1, which is characterized by being mainly prepared from the following raw materials in parts by weight: 30 parts of modified biochar, 10 parts of nano corn starch, 10 parts of mesoporous silicon oxide nanoparticles, 10 parts of bentonite and 5 parts of organic silicon polyoxyethylene ether compound.
3. The composite biochar-based carrier with pesticide slow-release performance as claimed in claim 1, which is characterized by being mainly prepared from the following raw materials in parts by weight: 50 parts of modified biochar, 20 parts of nano corn starch, 20 parts of mesoporous silicon oxide nanoparticles, 20 parts of bentonite and 10 parts of organic silicon polyoxyethylene ether compound.
4. The composite biochar-based carrier with pesticide slow-release performance as claimed in claim 1, which is characterized by being mainly prepared from the following raw materials in parts by weight: 40 parts of modified biochar, 15 parts of nano corn starch, 15 parts of mesoporous silicon oxide nanoparticles, 15 parts of bentonite and 7.5 parts of organic silicon polyoxyethylene ether compound.
5. The composite biochar-based carrier with pesticide slow-release performance as claimed in any one of claims 1 to 4, wherein the modified biochar is prepared by the following method: steam explosion crushing is carried out on bamboo and wood chips, the bamboo and wood chips are pyrolyzed for 2-3 hours at the temperature of 600-700 ℃ under the protection of nitrogen, and then the bamboo and wood chips are ultrasonically dispersed in 15 times of water according to the mass ratio of 1: 2-3, adding a proper amount of beta-cyclodextrin-polyglutamic acid, performing ultrasonic dispersion for 10min, adjusting the pH value to be neutral, drying, and grinding to obtain the modified charcoal.
6. A preparation method of a composite biochar-based carrier with pesticide slow-release performance is characterized by comprising the following steps:
s1, ultrasonically dispersing the weighed nano corn starch in 5 times of water to form a nano corn starch suspension;
s2, sequentially ultrasonically dispersing the weighed mesoporous silica nano particles and organic silicon polyoxyethylene ether compound in the nano corn starch suspension to obtain a mixed solution;
s3, mixing and stirring the weighed modified biochar and bentonite uniformly, mixing the mixture with the mixed solution, stirring uniformly, drying until the water content is lower than 10%, and granulating to obtain the modified biochar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996845.0A CN113754485A (en) | 2021-08-27 | 2021-08-27 | Composite biochar-based carrier with pesticide slow-release performance and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110996845.0A CN113754485A (en) | 2021-08-27 | 2021-08-27 | Composite biochar-based carrier with pesticide slow-release performance and preparation method thereof |
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| CN113754485A true CN113754485A (en) | 2021-12-07 |
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| CN202110996845.0A Pending CN113754485A (en) | 2021-08-27 | 2021-08-27 | Composite biochar-based carrier with pesticide slow-release performance and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107183019A (en) * | 2017-06-01 | 2017-09-22 | 华中农业大学 | A kind of compound bio charcoal base carrier and preparation method and application with pesticide slow-release performance |
| CN113024286A (en) * | 2021-03-26 | 2021-06-25 | 青海省农林科学院 | Modified biochar, biochar-based organic fertilizer and preparation method thereof |
-
2021
- 2021-08-27 CN CN202110996845.0A patent/CN113754485A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107183019A (en) * | 2017-06-01 | 2017-09-22 | 华中农业大学 | A kind of compound bio charcoal base carrier and preparation method and application with pesticide slow-release performance |
| CN113024286A (en) * | 2021-03-26 | 2021-06-25 | 青海省农林科学院 | Modified biochar, biochar-based organic fertilizer and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 王罗春 等: "《农村农药污染及防治》", 31 January 2019, 冶金工业出版社，第1版 * |
| 邓延陆 等: "《保持农业经济的可持续发展 循环农业篇》", 31 July 2011, 湖南教育出版社 ,第1版 * |
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Application publication date: 20211207 |