Natural Chinese herbal medicine capable of killing cyanobacterial bloom and preparation method thereof

Abstract

The invention discloses a natural Chinese herbal medicine capable of killing cyanobacterial bloom. The natural Chinese herbal medicine comprises the following components by weight percent: 10-30 partsof astragalus membranaceus, 10-25% of houttuynia cordata, 5-20% of radix rehmanniae, 5-10% of mirabilite, 5-10% of cortex ailanthic, 2-8% of betel nut and 2-5% of ginkgo. The natural Chinese herbal medicine is prepared according to the following steps: selecting, cleaning and sterilizing the traditional Chinese medicine raw materials and then weighting in parts by weight, drying, cutting and uniformly mixing; adding water for soaking, heating, refluxing and then extracting the filtrate; adding water, heating, refluxing and then removing residue and extracting the filtrate; mixing the two filtrates. The principle of the plant secondary metabolite (allelochemical) having an obvious allelochemical killing effect to alga is utilized; various Chinese herbal medicines have a synergic alga-killing effect through the allelochemical in low concentration on the basis of the principle of traditional Chinese pharmacology compatibility; the natural Chinese herbal medicine has the advantages of high alga-inhibiting speed, safety, no toxicity, and the like, and can be used for controlling the large-area phytoplankton bloom.

Description

Technical field: [0001] The invention relates to the field of water ecological control and environmental protection, in particular to a natural Chinese herbal medicine capable of contact-killing cyanobacteria blooms and a preparation method thereof. Background technique: [0002] In recent years, with the continuous development of urbanization in my country, the discharge of industrial, agricultural and domestic sewage has increased rapidly, and a large amount of sewage containing N and P has entered the water environment. The growth, reproduction and outbreak of cyanobacteria are the process of N and P enrichment and conversion. , has no pollution to water bodies, and basically does not release algae toxins. However, after its death, the N, P, organic matter and algae toxins contained in it will be released into the water body and sediment, becoming the main endogenous pollution of rivers and lakes. Under aerobic and anaerobic conditions, aerobic microorganisms, aquatic pla...

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Problems solved by technology

Although the effect is quick, the indicators do not cure the root cause, and a lot of manpower, material and financial resources are needed

2. Chemical method: Chemical algae removal is to control the reproduction of algae in water through chemical agents. Chemical algicides can achieve b

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