Composite hydrogel sphere algaecide and preparation method thereof

Abstract

The invention relates to a composite hydrogel sphere algaecide and a preparation method thereof, and is applicable to algae removal of a small-size landscape water body which takes the blue-green algae as dominant species. The composite hydrogel sphere algaecide comprises 1000-1500 parts by weight of sodium alginate and 200-600 parts of graphene oxide, and is prepared by firstly, adding sodium alginate into deionized water, stirring with magnetic force until sodium alginate is completely dissolved, thereby preparing a 2-3% (w / v) solution, and by subsequently adding graphene oxide. The preparation method comprises the following steps: 1) adding a certain amount of sodium alginate into deionized water, stirring with magnetic force until sodium alginate is completely dissolved, thereby preparing a 2-3% (w / v) solution; 2) subsequently adding graphene oxide and an allelochemical substance gallic acid, and uniformly mixing by using an ultrasonic assistance oscillation method, thereby preparing a dispersing liquid; 3) dropping the dispersing liquid into a 5-10% CaC12 solution by using a burette so as to cure to obtain calcium gel spheres, curing for 1-2 hours, and taking out; 4) repeatedly washing with deionized water, and standing to remove residues on the surface; and 5) drying in a vacuum oven.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to an algaecide, in particular to a sodium alginate / graphene oxide / gallic acid composite hydrogel ball algaecide, and a method for preparing the algaecide . It is suitable for algae removal in small landscape water bodies where cyanobacteria are the dominant species. Background technique [0002] Large-scale algae outbreaks of harmful algae such as cyanobacteria have seriously damaged the balance and stability of the aquatic ecosystem, not only affecting the water landscape and the development of aquaculture, but also algal toxins have become a threat to the human living environment. Therefore, how to control and eliminate the explosive growth of harmful algae in eutrophic water bodies is currently a research hotspot and frontier in the field of water environment. At present, the methods to control the outbreak of algae bloom mainly include: physical method, chemi...

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Problems solved by technology

Gallic acid is the main allelochemical reported so far, which can significantly inhibit the growth of Microcystis aeruginosa (published in Water Research, 2000, 34(11):3026-3032), but it cannot make the algal cells settle to the bottom of the water body, which hinders the growth of Microcystis aeruginosa. watch