Flocculant for removing Cyanobacteria bloom microcystis, preparation method and applications thereof

Abstract

The invention is a flocculant for removing Cyanobacteria bloom microcystis, a preparation method and applications thereof, wherein the flocculant is prepared from clay and chitosan. The preparation method comprises: drying clay, crushing to achieve a fineness of 100 [mu]m, dissolving chitosan by using hydrochloric acid having a concentration of 1% (wt%) to obtain a 1 mg / mL chitosan hydrochloric acid solution, sufficiently impregnating with the clay powder, and drying to obtain the flocculant. The invention provides the modified clay flocculant for removing the microcystis during the generation of Cyanobacteria blooms, the preparation method and applications thereof, wherein the microcystis in the Cyanobacteria bloom water can be rapidly and rapidly removed, the emergency treatment on the Cyanobacteria bloom generation can be achieved, the removing effect is good, the effect is rapid, the operation is simple, and the important theoretical and practical significance is provided for the rapid treatment of the Cyanobacteria bloom generation; and the clay around the Cyanobacteria bloom generation soil can be used to modify, such that the long-distance transportation cost of the flocculant can be saved, and the economic benefits are impressive.

Description

technical field [0001] The invention relates to the technical field of water resource treatment, in particular to a flocculant for removing cyanobacteria Microcystis blooms and its preparation method and application. Background technique [0002] Excessive nitrogen, phosphorus and other nutrients enter natural water bodies with human activities, resulting in eutrophication of water bodies. Eutrophication can lead to explosive growth of certain algae, causing algal blooms or red tides. In recent years, my country's Chaohu Lake, Dianchi Lake, Taihu Lake and other water bodies have frequently experienced algal blooms. Water blooms in natural freshwater bodies include cyanobacteria blooms, green algae blooms and diatom blooms, etc. Among them, cyanobacteria blooms are the most frequent blooms, and the dominant species is Microcystis. [0003] Algae blooms will seriously affect the normal functions of water bodies, not only adversely affecting phytoplankton, benthic animals, aq...

AI Technical Summary

Problems solved by technology

Physical methods include filtration, mechanical salvage, activated carbon adsorption, air flotation, ultrasonic algae control, etc., which directly act on the algae, and the treatment effect is good, but the operation cost is high

Chemical methods include oxidation, non-oxidation, and coagulation-sedimentation methods. Non-oxidation methods mainly remove algae by adding chemical algaecides to water. Algaecides mainly include copper sulfate, some surfactants, herbicides, etc., which can Effective algae removal and anti-algae, but due to the additional addition of chemical agents to the water, it is easy to cause secondary pollution, and the amount of algaecide is high, and the cost is high; oxidation methods include pre-oxidation, advanced oxidation, photocatalytic oxidation, etc., which can effectively remove water. algae, but it is easy to produce harmful by-products, or cause the algae to rupture and cause the release of intracellular toxins; the coagulation sedimentation method is quick and effective, and the removal effect is good, but it needs to add a large amount of coagulant solids to the water, which will increase the solid content in the water , the cost is high, and the long-term benefits cannot be accurately evaluated

The biological method is effective and long-lasting, but its effect is slow and it is easy to cause changes in the original ecosystem

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