Preparation method of flavone sustained-release algal inhibition preparation

A flavonoid, slow-release technology, applied in botany equipment and methods, herbicides and algicides, chemicals for biological control, etc., can solve the problem of affecting the growth of non-algae organisms, short duration of drug efficacy, ecological environment Side effects and other issues, to achieve the effect of long-lasting action, good ecological safety, and no secondary pollution

Active Publication Date: 2015-08-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In practical applications, it is unreasonable to directly inject suitable flavonoids into water bodies where algae blooms occur, because flavonoids are directly injected into water bodies, which will easily cause local concentrations to be too high, affect the growth of non-algae organisms and have adverse effects on the ecological environment. side effects, and its duration of efficacy is short

Method used

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  • Preparation method of flavone sustained-release algal inhibition preparation
  • Preparation method of flavone sustained-release algal inhibition preparation
  • Preparation method of flavone sustained-release algal inhibition preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A flavonoid slow-release anti-algae preparation, which contains 5,4'-dihydroxyflavone with a mass fraction of 30-50%, embedding agents such as sodium alginate with a mass fraction of 50-70%, and an encapsulation efficiency of 50- 70%.

[0023] Weigh 5,4'-dihydroxyflavone and dissolve it in dimethyl sulfoxide to prepare a 5,4'-dihydroxyflavone dimethyl sulfoxide solution with a concentration of 10 mg / mL; weigh sodium alginate and It is dissolved in distilled water to prepare a sodium alginate solution with a mass fraction of 5%. Mix 5,4'-dihydroxyflavone dimethyl sulfoxide solution with a concentration of 10 mg / mL and 5% sodium alginate solution with a mass fraction of 1:10 by volume, shake well and prepare a flavone-sodium alginate solution. Take chitosan and anhydrous calcium chloride, and dissolve it in the distilled aqueous solution of 1% acetic acid by volume fraction, be formulated with chitosan-calcium chloride mixed solution, wherein the amount of chitosan in th...

Embodiment 2

[0024] Weigh 5,4'-dihydroxyflavone and dissolve it in dimethyl sulfoxide to prepare a 5,4'-dihydroxyflavone dimethyl sulfoxide solution with a concentration of 5 mg / mL; weigh sodium alginate and It was dissolved in distilled water and prepared as a 5% sodium alginate solution by mass fraction; 5,4'-dihydroxyflavone dimethyl sulfoxide solution with a mass fraction of 5 mg / mL and a 5% sodium alginate solution by volume Mix at a ratio of 1:10, shake well and prepare a flavonoid-sodium alginate solution. Weigh chitosan and anhydrous calcium chloride and dissolve it in the distilled aqueous solution of 1% acetic acid by volume fraction to prepare chitosan-calcium chloride mixed solution, wherein the mass of chitosan in the mixed solution The fraction is 1%, and the mass fraction of calcium chloride in the mixed solution is 0.5%; and the pH value of the polysaccharide-calcium chloride mixed solution is adjusted to 7.0 with a NaOH solution having a concentration of 0.2 g / mL. Take th...

Embodiment 3

[0026] Weigh 5,4'-dihydroxyflavone and dissolve it in dimethyl sulfoxide to prepare a 5,4'-dihydroxyflavone dimethyl sulfoxide solution with a concentration of 10 mg / mL; weigh sodium alginate and It was dissolved in distilled water and prepared as a 3% sodium alginate solution; the 5,4'-dihydroxyflavone dimethyl sulfoxide solution with a concentration of 10 mg / mL was mixed with a 5% sodium alginate solution Mix according to volume ratio 1:10, shake well to make flavone-sodium alginate solution. Take chitosan and anhydrous calcium chloride, and dissolve it in the distilled aqueous solution of 1% acetic acid by volume fraction, be formulated with chitosan-calcium chloride mixed solution, wherein the amount of chitosan in the mixed solution The mass fraction is 2%, and the mass fraction of calcium chloride in the mixed solution is 0.5%; and the pH value of the chitosan solution is adjusted to 7.0 with 0.2 g / mL NaOH solution. Take the chitosan-calcium chloride solution and place ...

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Abstract

The invention belongs to the field of water body pollution control, and provides a preparation method of a flavone sustained-release algal inhibition preparation. The flavone sustained-release algal inhibition preparation comprises 30% to 50% of 5,4'-dihydroxylflavone and 50% to 70% of embedding agent such as sodium alginate in percentage by weight, and has an entrapment rate of 50% to 70%. The preparation method of the flavone sustained-release algal inhibition preparation comprises the steps of: mixing a 5,4'-dihydroxylflavone dimethyl sulfoxide solution and a sodium alginate solution and mixing the obtained mixed solution and the mixed solution of chitosan and anhydrous calcium chloride; and then after performing the reaction for a certain time, filtering to obtain a precipitated flavone sustained-release algal inhibition preparation. According to the preparation method, the used materials are high in ecological safety; the prepared flavone sustained-release algal inhibition preparation can obviously inhibit the growth activity of bloom algae, particularly inhibits the growth activity of microcystis aeruginosa, and can control or manage outbreak of algal bloom in lakes. Compared with the prior art, the flavone sustained-release algal inhibition preparation has durable action time, and is particularly suitable for preventing and managing the algal bloom which frequently breaks out.

Description

technical field [0001] The invention belongs to the field of water body pollution control and relates to a preparation method of flavonoid slow-release algae-inhibiting preparation. Background technique [0002] Algae blooms, especially algal blooms due to eutrophication of water bodies, are a common problem in countries all over the world. Algal blooms not only cause economic losses to the aquaculture industry, but also destroy the ecological landscape of the water area, leading to an imbalance in the ecosystem and endangering human health. How to stably and effectively inhibit the excessive growth of algae without causing other ecological hazards is currently a research hotspot in the field of water environment. Among them, the research on the control of harmful algae using plant allelochemicals has received extensive attention. The applicant applied for a patent in 2011 (patent publication number: CN2012102108685, titled: Preparation method and application of barley all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/16A01P13/00
Inventor 黄皓旻肖溪施积炎吴嘉平
Owner ZHEJIANG UNIV
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