Natural algicide and its preparation method and application
An algae inhibitor, a natural technology, applied in the fields of botanical equipment and methods, applications, herbicides and algaecides, etc., can solve the problems such as the inability to meet the requirements of algae control in lake ecosystems, and improve the efficiency of algal bloom control and operation. The effect of convenience and reducing the cost of algal bloom treatment
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[0048] In a further preferred embodiment of the present invention, the preparation method of the crustacean extract comprises the following steps: firstly extracting chitin from shrimp shell or crab shell, and then deacetylating the chitin to obtain the crustacean extract.
[0049] The preparation method of the crustacean extract has simple process and convenient operation, and can effectively reduce the preparation cost of the natural algae inhibitor.
[0050] In a further preferred embodiment of the present invention, the preparation method of chitin includes the following steps: putting chitin into a NaOH solution, and performing a deacetylation reaction to obtain a crustacean extract.
[0051] In a preferred embodiment of the present invention, putting chitin into a NaOH solution makes it easier to carry out the deacetylation reaction, thereby more conducive to improving the deacetylation rate and improving the solubility of the crustacean extract.
[0052] In a preferred em...
Embodiment 1
[0088] The present embodiment provides a natural algae inhibitor, comprising the following raw materials in parts by mass: 10 parts of crustacean extract, 64 parts of Houttuynia cordata extract and 10 parts of sodium alginate, and the preparation method includes the following steps:
[0089] (1) Preparation of crustacean extract: Select shrimp shell / crab shell to remove impurities and wash with clean water. Soak the washed shrimp shells / crab shells in 5%-10% hydrochloric acid solution for 3 days, remove calcium salts, filter, wash with clean water until neutral, put in 10% NaOH solution, heat and boil for 3 hours, filter, wash with clean water, It was then oxidized with 0.4% potassium permanganate for 2 h, followed by 0.2% NaHSO 3 The reaction was carried out until the color of potassium permanganate completely faded, and dried in the sun to obtain white flaky chitin; put the chitin into a 50% NaOH solution, keep the temperature at 100°C and the stirring speed at 50r / min, and ...
Embodiment 2
[0094]This embodiment provides a natural algae inhibitor, comprising the following raw materials in parts by mass: 15 parts of crustacean extract, 51.5 parts of Houttuynia cordata extract and 25 parts of sodium alginate, and step (1) of its preparation method And step (2) is all identical with embodiment 1, and its difference is,
[0095] In step (3), in the prepared crustacean extract solution, the mass concentration of the crustacean extract is 15%; in the prepared sodium alginate solution, the mass concentration of sodium alginate is 12.5%; the prepared fish In the Houttuynia cordata solution, the mass concentration of the Houttuynia cordata solution is 75%;
[0096] In step (4), after the crustacean extract solution and the sodium alginate solution were left to stand overnight respectively, 20 mL of sodium alginate solution was added to 10 mL of the crustacean extract solution under stirring, and the stirring was continued for 3 hours to obtain a mixed solution, After add...
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