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Preparation method and application of slow release algistat based on compound allelochemical

A technology for slow-release algae inhibitor and allelopathic substance, which is applied in the field of preparation of compound allelochemical substance slow-release algae inhibitor, can solve the problems of inability to effectively control the growth of algae on the water surface, high local concentration, short-term effect, etc. Long-lasting effect of algae

Inactive Publication Date: 2017-03-22
INST OF AQUATIC LIFE ACAD SINICA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the planktonic growth characteristics of algae, putting allelochemicals directly into the water body in practical applications will easily cause the problem that the local concentration is too high and the effect will be short-lived. Algae inhibitor application area, or the sinking of the preparation cannot effectively control the growth of algae on the surface of the water body

Method used

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  • Preparation method and application of slow release algistat based on compound allelochemical
  • Preparation method and application of slow release algistat based on compound allelochemical
  • Preparation method and application of slow release algistat based on compound allelochemical

Examples

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Effect test

Embodiment 1

[0031] A preparation method of a composite allelochemical slow-release algastatic agent, the steps are as follows:

[0032] (1) Prepare a gallic acid solution with a mass volume concentration of 500mg / L, a 50mg / L nonanoic acid dimethyl sulfoxide solution, and a 50mg / L EMA dimethyl sulfoxide solution, and then mix them in equal volumes to form a compound allelochemical ;

[0033] (2) Weigh sodium alginate and dissolve it in distilled water at 80°C, add the sodium alginate solution to the compound allelochemicals in step (1) for mixing, the mass of sodium alginate accounts for 5% of the total mass of the mixture %, stirred at 500r / min for 13min and shaken to make a composite allelochemical-sodium alginate solution;

[0034] (3) Place the container of the compound allelochemical-sodium alginate solution in a water bath to keep the temperature stable, and the temperature of the water bath is 60°C;

[0035] (4) Pour the calcium chloride solution with a mass fraction of 5% into th...

Embodiment 2

[0038] A preparation method of a composite allelochemical slow-release algastatic agent, the steps are as follows:

[0039] (1) Prepare a gallic acid solution with a mass volume concentration of 20mg / L, a 2.0mg / L nonanoic acid dimethyl sulfoxide solution and a 2.0mg / L EMA dimethyl sulfoxide solution, and then mix equal volumes to form a compound Sensitive substance;

[0040] (2) Weigh sodium alginate and dissolve it in distilled water at 60°C, add the sodium alginate solution to the compound allelochemicals in step (1) for mixing, the mass of sodium alginate accounts for 3% of the total mass of the mixture %, stirred at 400r / min for 15min and shaken to make a compound allelochemical-sodium alginate solution;

[0041] (3) Place the container of the composite allelochemical-sodium alginate solution in a water bath to keep the temperature stable, and the temperature of the water bath is 20°C;

[0042] (4) Pour the calcium chloride solution with a mass fraction of 5% into the co...

Embodiment 3

[0045] A preparation method of a composite allelochemical slow-release algastatic agent, the steps are as follows:

[0046] (1) Prepare a gallic acid solution with a mass volume concentration of 100mg / L, a 10mg / L nonanoic acid dimethyl sulfoxide solution, and a 10mg / L EMA dimethyl sulfoxide solution, and then mix them in equal volumes to form a compound allelochemical ;

[0047](2) Weigh sodium alginate and dissolve it in distilled water at 70°C, add the sodium alginate solution to the compound allelochemicals in step (1) for mixing, the mass of sodium alginate accounts for 4% of the total mass of the mixture %, stirred at 600r / min for 10min and shaken to make compound allelochemical-sodium alginate solution;

[0048] (3) Place the container of the composite allelochemical-sodium alginate solution in a water bath to keep the temperature stable, and the temperature of the water bath is 80°C;

[0049] (4) Pour the calcium chloride solution with a mass fraction of 3% into the c...

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Abstract

The invention belongs to the field of water body pollution control, and relates to a preparation method and application of a slow release algistat based on compound allelochemical. The compound allelochemical slow release algistat is characterized in that three kinds of compound allelochemical including gallic acid, n-nonanoic acid and 2-methyl-acetoacetic ester (EMA) are selected for preparing the slow release algistat according to the proportion, a natural high-molecular compound, namely sodium alginate, is selected to be used as a slow release carrier, and a 3%-5% sodium alginate solution and a 3%-5% calcium chloride are subject to gelling forming to obtain the slow release algistat. By means of the preparation method and application, the time length of pesticide effects on restraining algae growth can be prolonged; and meanwhile, the problem that the slow release algistat cannot be effectively used due to flotation along with wind and sedimentation in the using process is solved.

Description

technical field [0001] The invention belongs to the field of water body pollution control, and relates to a preparation method and application of a composite allelochemical slow-release algae inhibitor. Background technique [0002] In recent years, lakes, reservoirs and other water bodies have frequently erupted due to eutrophication and other reasons. The outbreak of algal blooms leads to an imbalance in the ecosystem and endangers human health. Therefore, how to effectively control algal blooms is a research hotspot in the field of water environment. [0003] Regarding the control of algae growth, a large number of domestic and foreign studies have demonstrated that the use of plant allelopathy to inhibit algae has the characteristics of high efficiency and good ecological security. Many scholars have done research and achieved a series of research results, such as: Chinese patent CN2012102108685 preparation method and application of barley allelopathic algae-inhibiting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N37/42A01N37/40A01N37/02A01N25/10A01P13/00C02F1/50
CPCA01N37/42A01N25/10A01N37/02A01N37/40C02F1/50A01N2300/00
Inventor 胡红娟仲玉芳范华沈小红严鸿吴辰熙熊雄
Owner INST OF AQUATIC LIFE ACAD SINICA
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