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Preparation method of modified algicide

An algicide and modification technology, which is applied in the direction of herbicides and algicides, botanical equipment and methods, biocides, etc., can solve the problems of poor persistence of algae inhibition effect, temporary cure, not root cause, and harm, and achieve algae inhibition The effect of less ingredient consumption, high ecological safety, and simple preparation process

Active Publication Date: 2018-03-23
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chemical algae inhibitors such as copper sulfate are usually used in large doses, which will cause secondary pollution to the environment; physical algae inhibitors such as natural loess require too much work, and there is a problem of treating the symptoms but not the root cause, and the cost of treatment is high, making it difficult to use in practical applications. However, the dosage of biochemical algicides such as artemisinin is small, and only inhibits specific algae in the water body, which has high ecological security and will not cause secondary pollution to the environment; therefore, using the allelopathic effect between plants Research to curb algal blooms attracts attention
[0005] At present, there are some reports on the preparation method and algae-inhibiting performance of the algae-inhibiting agent; The algae inhibitor is easy to use, low in cost, and ideal in inhibiting algae, but it also has the following disadvantages: first, because the algae inhibitor contains aluminum and copper salts, it will cause secondary pollution to the water body and is also toxic to other aquatic organisms. There is no adverse reaction in the short term, and there may be long-term harm due to the accumulation and residue in aquatic organisms; secondly, the freeze-dried water celery powder used in this algastatic agent has insufficient concentration of effective algae inhibitory ingredients in practical applications, and effectively inhibits algae. The algae components are lost rapidly in the water body, the algae inhibition effect is poor in sustainability, and it is impossible to carry out long-term cyanobacteria control work; therefore, it is urgent to develop a modified algicide that can kill algae quickly, continuously inhibit algae, and be environmentally friendly

Method used

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preparation example Construction

[0020] The preparation method of modified algicide, the method comprises the steps of:

[0021] (1) Separately dissolve a certain amount of linoleic acid and artemisinin;

[0022] (2) Prepare N groups of linoleic acid artemisinin solutions with different ratios;

[0023] (3) Add an emulsifier to the linoleic acid artemisinin solution with different proportions in group N for emulsification;

[0024] (4) After emulsification, add sodium alginate and mix evenly to form a mixed solution of group N;

[0025] (5) Drop the above mixed solution into the CaCl2 solution to form a modified algicide gel;

[0026] (6) Rinse the modified algicide gel with distilled water, and dry to obtain the modified algicide.

[0027] The step (1) dissolves a certain mass of linoleic acid and artemisinin respectively, the specific method is: use two parts of ethyl oleate with a certain mass percentage concentration of 2% to 5% to dissolve linoleic acid and artemisinin respectively element, and respe...

Embodiment 1

[0036] The preparation method of the modified algicide, the preparation steps are as follows:

[0037] (1) Dissolve 0.6g linoleic acid and 0.6g artemisinin in two portions of 3mL ethyl oleate with a concentration of 100% by mass, and add 2mL methanol as a co-solvent to each, at an ultrasonic frequency of 40KHz and a temperature of 25°C Sonicate for 15 minutes under conditions to accelerate dissolution;

[0038] (2) Mix the dissolved linoleic acid and artemisinin in proportion to form three sets of ratio systems, the ratios are linoleic acid:artemisinin=1:4, 1:1, 4:1;

[0039] (3) Add 6 mL of TWEEN-20 with a mass percentage concentration of 100% to the above three groups of systems for emulsification. The emulsification time is 25 minutes, and the emulsification temperature is 48 ° C. After emulsification, use distilled water to prepare 50 mL of the three groups of solutions respectively;

[0040] (4) Add 1g of sodium alginate with a mass percentage concentration of 100% to th...

Embodiment 2

[0046] The preparation method of the modified algicide, the preparation steps are the same as in Example 1.

[0047] Use above-mentioned modified algicide to carry out acute toxicity experiment to the cultivated Microcystis aeruginosa, the added concentration of described modified algicide is 1g / L, and the initial concentration of described Microcystis aeruginosa is 2×10 5cell / L, which can simulate the water body in the state of cyanobacteria not blooming, set up three parallel groups, one control group (without adding modified algicide), observe once every 24h, and observe continuously for 10 days, through the attached figure 2 It can be seen that for the modified algicide with linoleic acid: artemisinin=4:1 ratio, the inhibition rate of Microcystis aeruginosa reaches 87%, and the continuous observation for 30 days, for linoleic acid: artemisinin=4 :1 ratio of the modified algicide, the inhibition rate of Microcystis aeruginosa reached 92.5%, and the algae inhibition effect ...

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Abstract

The invention provides a preparation method of a modified algicide. The preparation method of the modified algicide particularly includes the steps: (1) separately dissolving a certain mass of linoleic acid and a certain mass of artemisinin; (2) preparing N groups of linoleic acid and artemisinin solution with different ratios; (3) adding an emulsifier into the N groups of linoleic acid and artemisinin solution with the different ratios and emulsifying the N groups of linoleic acid and artemisinin solution; (4) adding sodium alginate, and mixing the materials uniformly to form N groups of mixed solution after emulsifying; (5) dropwise adding the mixed solution into CaCl2 solution to form modified algicide gel; (6) washing the modified algicide gel with distilled water, and drying the modified algicide gel to obtain the modified algicide. The preparation method of the modified algicide has the advantages that the prepared modified algicide can rapidly kill algae and continuously inhibitthe algae, secondary pollution is avoided, ecological safety is high, preparation flow is simple, the raw materials are easily obtained, and the cost is low.

Description

technical field [0001] The invention relates to a preparation method of a modified algicide, which belongs to the field of water body pollution control. Background technique [0002] Under the influence of human activities, water eutrophication caused by a large amount of nitrogen and phosphorus nutrient input has become an important environmental problem; The water quality destroys the balance of the water ecosystem and poses a threat to the safety of drinking water sources. It has become an important factor restricting the sustainable development of my country's social economy; therefore, how to effectively control algae in eutrophic water has become a research field in the field of water pollution control. Hotspots and Frontiers. [0003] In the control of algal blooms, the development and application of algae inhibitors is considered to be one of the effective and potential countermeasures; currently, algae inhibitors can be roughly divided into three categories according...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/08A01N43/90A01N37/06A01P13/00
CPCA01N37/06A01N43/90A01N59/08
Inventor 陈娟王沛芳王超孙胜浩
Owner HOHAI UNIV
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