Method for preparing linoleic acid sustained-release algal inhibiting agent

A technology of linoleic acid and algae inhibitor, which is applied in the field of preparation of linoleic acid sustained-release algae inhibitor, which can solve the problems of algae drug resistance, environmental pollution, and failure to reach the inhibitory concentration, so as to improve the algae inhibition effect , Avoid secondary pollution, reduce the effect of input times

Inactive Publication Date: 2014-01-01
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]Technical problem solved: Adding chemical algicides directly to the water body will cause the following problems: (1) Long-term use of low-concentration chemicals It will cause algae to develop drug resistance; (2) It may cause pollution to the environment, and the secondary pollution caused by dead algae and the bioaccumulation and biomagnification of chemicals will have a greater negative impact on the entire ecosystem; (3) Direct input into Water body, the workload is heavy, and the loss is rapid, and the inhibitory concentration cannot be reached

Method used

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  • Method for preparing linoleic acid sustained-release algal inhibiting agent
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  • Method for preparing linoleic acid sustained-release algal inhibiting agent

Examples

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Effect test

Embodiment 1

[0024] Weigh 0.1g linoleic acid and dissolve it in 1.5mL ethyl oleate, then add 0.7mL emulsifier OP-10, make a 50mL solution with distilled water, then add 1.25g sodium alginate and mix well, draw the above mixture with a syringe Drop into 100 mL of glacial acetic acid solution containing 1 g of chitosan and 4 g of calcium chloride with a content of 3 mL of glacial acetic acid to form microspheres, add 1.5 mL of glutaraldehyde after cooling to room temperature, filter with suction, and rinse with petroleum ether and distilled water for 5 -8 times; after drying for 36h-72h, the linoleic acid slow-release body algae inhibitor was obtained.

[0025] Use the linoleic acid slow-release body algae inhibitor to conduct acute toxicity experiments on aseptically cultured Microcystis aeruginosa, set up three parallel groups, observe once every 24 hours, and observe continuously for one week. When the weighed linoleic acid slow-release body algae inhibitor When the dosage is 1g, its 96h ...

Embodiment 2

[0028] Weigh 0.2g linoleic acid and dissolve it in 1.5mL ethyl oleate, then add 0.6mL emulsifier OP-10, make a 50mL solution with distilled water, then add 1.25g sodium alginate and mix well, draw the above mixture with a syringe Drop into 100mL glacial acetic acid solution containing 0.75g chitosan and 1g calcium chloride with 3mL glacial acetic acid content to form microspheres, add 1.5mL glutaraldehyde after cooling to room temperature, suction filter, rinse with petroleum ether and distilled water 5-8 times; after drying for 36h-72h, the linoleic acid slow-release body algae inhibitor is obtained.

[0029] Use the linoleic acid slow-release body algae inhibitor to conduct acute toxicity experiments on aseptically cultured Microcystis aeruginosa, set up three parallel groups, observe once every 24 hours, and observe continuously for one week. When the weighed linoleic acid slow-release body algae inhibitor When the agent is 1g, its 96h inhibition rate to Microcystis aerugin...

Embodiment 3

[0032] Weigh 0.3g of linoleic acid and dissolve it in 1.5mL of ethyl oleate, then add 0.8mL of emulsifier OP-10, make a 50mL solution with distilled water, then add 0.75g of sodium alginate and mix well, draw the above mixture with a syringe Drop into 100mL glacial acetic acid solution containing 0.25g chitosan and 2g calcium chloride with 3mL glacial acetic acid content to form microspheres, add 1.5mL glutaraldehyde after cooling to room temperature, filter with suction, rinse with petroleum ether and distilled water 5-8 times; after drying for 36h-72h, the linoleic acid slow-release body algae inhibitor is obtained.

[0033] Use the linoleic acid slow-release body algae inhibitor to conduct acute toxicity experiments on aseptically cultured Microcystis aeruginosa, set up three parallel groups, observe once every 24 hours, and observe continuously for one week. When the weighed linoleic acid slow-release body algae inhibitor When the agent is 1g, its 96h inhibition rate to Mi...

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Abstract

A method for preparing a linoleic acid sustained-release algal inhibiting agent comprises the following steps that firstly, linoleic acid is dissolved through ethyl oleate, emulgator is added into the linoleic acid, and the emulsified linoleic acid is added into a solution of sodium alginate tech grade; secondly, the solution obtained in the first step is dropwise added into a glacial acetic acid solution containing chitosan and calcium chloride to form microspheres; thirdly, after the microspheres are cooled to the indoor temperature, a cross-linking agent is added into the cooled microspheres; fourthly, the process of suction filtration is carried out, and the microspheres to which the cross-linking agent is added are washed by petroleum ether and distilled water; fifthly, the linoleic acid sustained-release algal inhibiting agent is obtained after drying. Algal inhibition effective time is prolonged, the algal inhibition effect is improved, and cost is reduced. All adopted preparing materials are natural polymer materials which are non-toxic, good in biocompatibility and biodegradable, and the problems of secondary pollution caused by chemical algal removing and bio-concentration and biological amplification caused by chemical medicines can be effectively avoided.

Description

[0001] technical field [0002] The invention belongs to the field of water body eutrophication to suppress algae outbreaks, and relates to a preparation method of a linoleic acid slow-release algae inhibitor, in particular to making the algae-inhibiting substance linoleic acid into slow-release granules and applying it to real water bodies to inhibit algae The slow release of algae-inhibiting substances provides a new technical approach for the use of linoleic acid in natural water bodies for algae-inhibiting. [0003] Background technique [0004] Fatty acid substances are ubiquitous in terrestrial plants, and aquatic organisms also contain different types of fatty acids. It has been reported in the literature that certain fatty acids have allelopathic and algae-inhibiting effects. Linoleic acid is a kind of substance that is more common in fatty acid substances and has a better anti-algae effect. Microcapsule technology is a kind of micropackaging technology. The prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/28A01N25/10A01N37/06A01P13/00
Inventor 倪利晓接晓婷李时银王国祥胡淑珍储祥林李勇朱亮吴云海
Owner HOHAI UNIV
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