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Preparation method and application of slow release algicide

A slow-release algicide, sodium alginate technology, applied in herbicides and algicides, botanical equipment and methods, applications, etc., can solve the problem of high local concentration in the use area, and achieve good ecological safety and operation. Simple, controllable effects

Inactive Publication Date: 2017-05-10
INST OF AQUATIC LIFE ACAD SINICA
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, direct use of allelochemicals to inhibit algae will cause excessive local concentration in the area where it is used. It is not suitable to directly use allelochemicals alone to inhibit algae. It is necessary to combine existing research technologies to change the release mode of allelochemicals to effectively achieve high-efficiency inhibition. The effect of algae

Method used

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  • Preparation method and application of slow release algicide
  • Preparation method and application of slow release algicide
  • Preparation method and application of slow release algicide

Examples

Experimental program
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Effect test

Embodiment 1

[0039] according to figure 1 As can be seen, a kind of preparation method of slow release type algicide, its step is:

[0040] (1) Weigh a certain amount of sodium alginate powder ① and dissolve it in deionized water, and dissolve it in a constant temperature water bath at 50 or 52 or 54 or 56 or 58 or 60°C to obtain a concentration of 1%, 2%, or 3% by mass. %, 4%, 5%, 6% and 7% of 20ml sodium alginate colloidal solutions of different concentrations, and then use 0.1-1mol / L hydrochloric acid solution to adjust the pH value of the sodium alginate solution ② to about 5.5, After the sodium alginate solution is cooled to about 20°C and the bubbles disappear, it is ready for use;

[0041] (2) Weigh 0.1g of phenolic acid allelochemical powder ③, dissolve it in deionized water and dilute to 100mL, mix well and prepare a solution of phenolic allelochemical with a concentration of 1.0mg / mL as the algicide Core substance (the addition amount of specific core phenolic acid substances w...

Embodiment 2

[0048] According to the optimized preparation conditions after screening, three different slow-release algastatic agents were prepared according to the order of embedding methods:

[0049] (1) The first one is to add pyrogallic acid solution, a representative substance of phenolic acids, into sodium alginate solution, and then directly drop the mixed homogeneous solution into calcium chloride solution for 20 or 25 or 30 or 35 or 40min, filter, wash and dry;

[0050] (2) The second is to pre-drop the uniform mixture of pyrogallic acid solution and sodium alginate solution, which is the representative substance of phenolic acids, into the calcium chloride solution drop by drop to fix, then filter, wash, and then add the above Put the washed embedding into chitosan dilute acetic acid solution for fixation for 20 or 24 or 28 or 32 or 36 or 40 min, filter, wash, and dry;

[0051] (3) The last one is to drop the uniform mixed solution of pyrogallic acid solution and sodium alginate...

Embodiment 3

[0057] A kind of slow-release type algicide is used in the application of the algicide in the dominant species of water bloom—Microcystis aeruginosa, and the steps are:

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Abstract

The invention discloses a preparation method and application of a slow release algicide. The method comprises: A, dissolving sodium alginate powder in deionized water to prepare a sodium alginate colloidal solution and adjusting pH of the solution; B, preparing a certain concentration of a phenolic acid allelopathic substance solution as a core substance; C, preparing a dilute acetic acid mixed solution of chitosan and calcium chloride powder to obtained a fixing solution; D, mixing the phenolic acid allelopathic substance solution and the sodium alginate solution according to a volume ratio of a core-wall solution; E, sucking the mixed solution of phenolic acid allelopathic substance solution and the sodium alginate solution taken as an embedding material to an injection syringe, and adding the mixed solution to the fixing solution for fixing drop by drop; F, filtering the obtained slow release algicide out of the fixing solution, and performing washing and bagging; and G, performing refrigeration and carrying out freeze drying through a freeze drier to obtain the slow release algicide. The algicide is applied to dominate algae species of water bloom, prevents use of toxic and harmful substances, is stable in embedding results, and has the highest inhibition rate being 60-75%.

Description

technical field [0001] The invention belongs to the field of water pollution control, and in particular relates to a preparation method of a slow-release algicide, and also relates to an application of a slow-release algicide. Background technique [0002] The cyanobacteria bloom problem caused by the eutrophication of water bodies has always been one of the environmental problems that human beings pay attention to. Its impact has not only involved the pollution of the natural environment and the deterioration of various water bodies, but also affected the normal life of human beings and society. sustainable economic development. Facing such a bad water pollution situation, seeking an effective treatment direction has become a hot issue in today's society. [0003] Among the three most commonly used methods for the eutrophication of water bodies: the physical method is costly to treat the symptoms but not the root cause, and cannot be used as a long-term solution to control...

Claims

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Application Information

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IPC IPC(8): A01N25/10A01N31/16A01P13/00C02F1/50
CPCA01N25/10A01N31/16C02F1/50C02F2303/20A01N2300/00
Inventor 吴振斌郑东凤刘碧云徐栋贺锋周巧红程龙张璐
Owner INST OF AQUATIC LIFE ACAD SINICA
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