An algaecide that effectively removes algae and allows algae to settle

Abstract

The invention relates to an algaecide. The algaecide which can be used for effectively removing algae and precipitating alga bodies contains chitosan, fly ash autoclaved brick powder and allelopathic chemicals of gallic acid, nonoic acid or N-phenyl-naphthylamine, and is obtained by dissolving a certain amount of chitosan by using hydrochloric acid, then adding the fly ash autoclaved brick powder of 40-200 meshes, and then adding the dimethyl sulfoxide assisted dissolved allelopathic chemicals of gallic acid, nonoic acid, N-phenyl-1-naphthylamine or N-phenyl-2-naphthylamine. The chitosan and the fly ash autoclaved brick powder used in the algaecide provided by the invention are nontoxic, the allelopathic chemicals of gallic acid, nonoic acid and the like belong to plant secondary metabolism products, can be degraded easily in a water body and cannot cause secondary pollution, and although the diluted HCl solution is used for dissolving chitosan, great changes of the pH value of the water body are not caused in a dosage range. The algaecide provided by the invention can be used for removing the algae effectively and ensuring that the alga bodies are sunk to the bottom of water, has a small influence on the environment and does not cause secondary pollution, the water body is clear, and the beautiful outlook of the water body is not influenced, so that the algaecide is suitable for removing the algae from a small landscape water body taking blue algae as a dominant species.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a safe algaecide for subsidence of algae, which is suitable for algae removal in small-scale landscape water bodies with blue-green algae as the dominant species. Background technique [0002] The eutrophication of water bodies is becoming more and more serious, and algal blooms frequently break out, posing a great threat to the balance of water ecosystems and human health. How to effectively control algal blooms and treat eutrophic water bodies is a research hotspot and frontier in the field of water environment. At present, lake algae control technology mainly includes: physical method, chemical method and biological method. [0003] Physical methods include mechanical, filtration, activated carbon adsorption, air flotation, shading technology, clay algae removal and other measures. The physical method directly removes algae in the water body without seconda...