Slow-release algal inhibition microsphere as well as preparation method and application thereof

Abstract

The invention provides slow-release algal inhibition microspheres as well as a preparation method and application thereof. The slow-release algal inhibition microspheres are prepared from the following raw materials: 1%-1.5% (w / v) of luteolin, 18%-20% (w / v) of olive oil, 10%-12% (w / v) of an emulsifier, 10%-12% (w / v) of a co-emulsifier, 1%-2.5% (w / v) of sodium alginate, 0.2%-0.3% (w / v) of chitosan, 4%-8% (w / v) of calcium chloride and 0.5%-1% (v / v) of a cross-linking agent. The slow-release algal inhibition microspheres provided by the invention can slow down and control the release rate of luteolin, the preparation process is simple, the cost is low, no pollution is caused to the environment, growth of microcystis can be remarkably and efficiently inhibited within 30-50 days through continuous and slow release of luteolin, meanwhile, release of microcystins (MCs) is efficiently inhibited, repeated addition of an algal inhibition agent is not needed, and the long-term and stable effect on efficiently inhibiting cyanobacterial bloom outbreak is achieved.

Description

technical field [0001] The invention relates to the technical field of water body environmental protection, in particular to a slow-release algae-inhibiting microsphere and a preparation method and application thereof. Background technique [0002] In recent years, cyanobacteria blooms have occurred frequently in many large lakes and reservoirs, and Microcystis is the dominant species of blooms, which can damage aquatic ecosystems by blocking sunlight and consuming oxygen. Microcystis usually produces and releases algal toxins to further pollute water bodies and poison aquatic organisms and humans, among which microcystins (MCs) are the most representative. The World Health Organization recommends that the content of MCs in drinking water be set at 1 μg / L, so controlling the growth of harmful algae and mitigating the release of MCs has become a widespread concern. [0003] The treatment of harmful algae can be divided into physical, chemical and biological methods. However...

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Problems solved by technology

[0004] The algae inhibitor slow-release technology uses physical and chemical means to store effective algae-inhibiting ingredients in continuous-release microspheres (continuous-release microspheres, CRM), and then release them slowly and continuously. The preparation of existing CRM and its anti-algae The effect has the following disadvantages: the production process is complicated and the production cost is high; the effect of inhibiting algae growth cannot be achieved for a long time and stable, and the effect needs to be further strengthened; while inhibiting the growth of algae, it lacks a long-term and high-efficiency inhibitory effect on the release of microcystin MCs; There is no report on the effect of CRM on inhibiting algae and inhibiting MCs under different environmental conditions

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