Photocatalytic agricultural pesticide residue removing agent as well as preparation method and application thereof

Abstract

The invention discloses a photocatalytic agricultural pesticide residue removing agent as well as a preparation method and application thereof. Every 1kg of the photocatalytic agricultural pesticide residue removing agent comprises the following components: 10-100g of sodium copper chlorophyllin, 40-50g of hydroxy cellulose, 18-22g of citric acid, 3-7g of calcium and the balance of water. The preparation method of the photocatalytic agricultural pesticide residue removing agent comprises the following operation steps: S1, dissolving sodium copper chlorophyllin with water, mixing with calcium, and heating to 30-40 DEG C; s2, then adding hydroxyl cellulose dissolved by water, and heating to 45-60 DEG C; and S3, finally adding citric acid, stirring the mixed solution, complementing the mixed solution with water to 1 kg, and fully dissolving the mixed solution for 1-2 hours to obtain the photocatalytic agricultural pesticide residue removing agent. The obtained photocatalytic agricultural pesticide residue removing agent can rapidly and effectively reduce the surface pesticide residues of fruits and vegetables in different periods, and is more efficient, safer, more environmentally friendly and low in toxic and side effects during use.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural pesticide residue removal agents, in particular to a photocatalytic agricultural pesticide residue removal agent and a preparation method and application thereof. Background Art

[0002] In agricultural production, the use of pesticides is an important means to increase crop yields and prevent and control pests and diseases. Pesticides are an indispensable special means of production in modern agriculture, and are of great significance to ensuring food security, reducing agricultural labor intensity, and promoting agricultural mechanization. However, the use of these agents will leave certain residues, which can be enriched through the food chain, induce cancer, neurodevelopmental disorders and other diseases, and at the same time destroy the balance of soil microbial communities and reduce the productivity of cultivated land.

[0003] Therefore, the development of an efficient, safe and environmentally friendly photocatalytic agricultural pesticide residue removal agent has become an important research topic in the current agricultural science and technology field. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a photocatalytic agricultural pesticide residue remover and a preparation method and application thereof. The photocatalytic agricultural pesticide residue remover obtained by the method can quickly and effectively reduce the amount of pesticide residues on the surfaces of fruits and vegetables at different periods, and is more efficient, safe, environmentally friendly and has low toxic side effects when used.

[0005] The present invention solves the above technical problems with the following technical solutions:

[0006] The photocatalytic agricultural pesticide residue remover of the present invention contains the following components per 1 kg of the photocatalytic agricultural pesticide residue remover: 10-100 g of sodium copper chlorophyll, 40-50 g of hydroxycellulose, 18-22 g of citric acid and 3-7 g of calcium, and the balance is water.

[0007] The preparation method of the photocatalytic agricultural pesticide residue removal agent of the present invention comprises the following steps:

[0008] S1. Dissolve sodium copper chlorophyllin in water, mix with calcium and heat to 30-40 degrees;

[0009] S2, then add hydroxycellulose dissolved in water and heat to 45-60 degrees;

[0010] S3. Finally, add citric acid, stir the mixed solution, add water to make up to 1 kg, and allow it to fully dissolve for 1-2 hours to obtain a photocatalytic agricultural pesticide residue remover.

[0011] In steps S1 and S2 of the present invention, the amount of water used to dissolve the sodium copper chlorophyll and hydroxycellulose is preferably sufficient to achieve dissolution.

[0012] Application of the photocatalytic agricultural pesticide residue remover of the present invention: after diluting the photocatalytic agricultural pesticide residue remover with water by 100-1000 times, spray it on the surface of fruits and vegetables or soak the fruits and vegetables to remove the pesticide residues.

[0013] The present invention has the following advantages:

[0014] (1) The photocatalytic agricultural pesticide residue remover obtained by the present invention can quickly and effectively reduce the amount of pesticide residues on the surface of fruits and vegetables at different times. Compared with existing pesticide residue removers, it is more efficient, safe, environmentally friendly and has low toxic side effects when used.

[0015] (2) The photocatalytic agricultural pesticide residue removal agent of the present invention has the advantages of being environmentally friendly and easy to operate, and can be easily and quickly dissolved in agricultural spraying water to remove pesticide residues.

[0016] (3) The dosage of the photocatalytic agricultural pesticide residue remover of the present invention can be adjusted over a wide range. After being diluted with water and sprayed on crops for 12-24 hours, the pesticide residue reduction rate is 64.4%-87.7%. The pesticide residue remover is water-soluble and can also be decomposed in the soil without any residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The gas chromatographic image obtained after blueberries soaked in 50 mg / L cypermethrin were soaked in the photocatalytic agricultural pesticide residue removal agent of Example 1 of the present invention for 5 minutes and illuminated for 24 hours, the residence time of the effective peak was 16.8 minutes, and according to the area normalization method, the pesticide residue on the surface of the blueberries treated with the photocatalytic agricultural pesticide residue removal agent of Example 1 was reduced from 100% to 12.3%.

[0018] Figure 2 The gas chromatographic image obtained after the blueberries soaked in 50 mg / L cypermethrin were soaked in the photocatalytic agricultural pesticide residue removal agent of Example 2 of the present invention for 5 minutes and illuminated for 24 hours, the residence time of the effective peak was 16.8 minutes, and according to the area normalization method, the pesticide residue on the surface of the blueberries treated with the photocatalytic agricultural pesticide residue removal agent of Example 2 was reduced from 100% to 13.9%.

[0019] Figure 3 The gas chromatographic image obtained after the blueberries soaked in 50 mg / L cypermethrin were soaked in the photocatalytic agricultural pesticide residue removal agent of Example 3 of the present invention for 5 minutes and illuminated for 24 hours, the residence time of the effective peak was 16.8 minutes, and according to the area normalization method, the pesticide residue on the surface of the blueberries treated with the photocatalytic agricultural pesticide residue removal agent of Example 3 was reduced from 100% to 35.6%. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below in conjunction with embodiments:

[0021] Embodiment 1

[0022] The photocatalytic agricultural pesticide residue remover of the present invention contains the following components per 1 kg of the photocatalytic agricultural pesticide residue remover: 100 g of sodium copper chlorophyll, 40 g of hydroxycellulose, 18 g of citric acid and 3 g of calcium, and the balance is water.

[0023] The preparation method of the above-mentioned photocatalytic agricultural pesticide residue removal agent comprises the following steps:

[0024] S1. Dissolve sodium copper chlorophyllin in 500g water, mix with calcium and heat to 30 degrees;

[0025] S2, then add 200g of hydroxycellulose dissolved in water and heat to 45 degrees;

[0026] S3. Finally, add citric acid, stir the mixed solution, add water to make up to 1 kg, and allow it to fully dissolve for 1 hour to obtain a photocatalytic agricultural pesticide residue remover.

[0027] When used, the photocatalytic agricultural pesticide removal agent is diluted 100 times with water and used to remove pesticide residues on the surface of fruits and vegetables. Taking blueberries as an example, the blueberries soaked in 50 mg / L of cypermethrin are soaked for 5 minutes and the pesticide residue rate can be reduced from 100% to 12.3% under ordinary light for 24 hours. Figure 1 shown.

[0028] Embodiment 2

[0029] The photocatalytic agricultural pesticide residue remover of the present invention contains the following components per 1 kg of the photocatalytic agricultural pesticide residue remover: 50 g of sodium copper chlorophyll, 50 g of hydroxycellulose, 20 g of citric acid and 4 g of calcium, and the balance is water.

[0030] The preparation method of the above-mentioned photocatalytic agricultural pesticide residue removal agent comprises the following steps:

[0031] S1. Dissolve sodium copper chlorophyllin in 300g water, mix with calcium and heat to 40 degrees;

[0032] S2, then add 300g of hydroxycellulose dissolved in water and heat to 50 degrees;

[0033] S3. Finally, add citric acid, stir the mixed solution, add water to make up to 1 kg, and allow it to fully dissolve for 2 hours to obtain a photocatalytic agricultural pesticide residue remover.

[0034] When used, the photocatalytic agricultural pesticide removal agent is diluted 1000 times with water and used to remove pesticide residues on the surface of fruits and vegetables. Taking blueberries as an example, the blueberries soaked in 50mg / L of highly effective chlorfluthrin are soaked for 5 minutes and the pesticide residue rate can be reduced from 100% to 13.9% under ordinary light for 24 hours. Figure 2 shown.

[0035] Embodiment 3

[0036] The photocatalytic agricultural pesticide residue remover of the present invention contains the following components per 1 kg of the photocatalytic agricultural pesticide residue remover: 10 g of sodium copper chlorophyll, 45 g of hydroxycellulose, 22 g of citric acid and 7 g of calcium, which are supplemented to 1 kg with water.

[0037] The preparation method of the above-mentioned photocatalytic agricultural pesticide residue removal agent comprises the following steps:

[0038] S1. Dissolve sodium copper chlorophyllin in 400g water, mix with calcium and heat to 40 degrees;

[0039] S2, then add 100g of hydroxycellulose dissolved in water and heat to 60 degrees;

[0040] S3. Finally, add citric acid, stir the mixed solution, add water to make up to 1 kg, and allow it to fully dissolve for 2 hours to obtain a photocatalytic agricultural pesticide residue remover.

[0041] When used, the photocatalytic agricultural pesticide removal agent is diluted 500 times with water and used to remove pesticide residues on the surface of fruits and vegetables. Taking blueberries as an example, the blueberries soaked in 50 mg / L of highly effective chlorfluthrin are soaked for 5 minutes and the pesticide residue rate can be reduced from 100% to 35.6% under ordinary light for 24 hours. Figure 3 shown.

Claims

1. A photocatalytic agricultural pesticide residue removal agent, characterized in that: The components contained in each kilogram of photocatalytic agricultural pesticide residue remover are as follows: 10-100g of sodium copper chlorophyllin, 40-50g of hydroxycellulose, 18-22g of citric acid and 3-7g of calcium, and the balance is water.

2. The method for preparing the photocatalytic agricultural pesticide residue removal agent according to claim 1, characterized in that: The method comprises the following steps: S1. Dissolve sodium copper chlorophyllin in water, mix with calcium and heat to 30-40 degrees; S2, then add hydroxycellulose dissolved in water and heat to 45-60 degrees; S3. Finally, add citric acid, stir the mixed solution, add water to make up to 1 kg, and allow it to fully dissolve for 1-2 hours to obtain a photocatalytic agricultural pesticide residue remover.

3. The method for preparing the photocatalytic agricultural pesticide residue removal agent as claimed in claim 2, characterized in that: In the steps S1 and S2, the amount of water used to dissolve the sodium copper chlorophyll and the hydroxycellulose is appropriate to achieve dissolution.

4. The use of the photocatalytic agricultural pesticide residue removal agent as claimed in any one of claims 1 to 3, characterized in that: After diluting the photocatalytic agricultural pesticide residue remover 100-1000 times with water, spray it on the surface of fruits and vegetables or soak the fruits and vegetables to remove pesticide residues.

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