A kind of preparation method and application of modified material capable of sedimentation of algae

Abstract

The invention relates to a preparation method of a modified material. A preparation method of a modified material capable of settling algae comprises the following steps: (1) pulverizing pulverized fuel ash steam-pressing bricks, grinding, and sieving; (2) dissolving calcium hydroxide with purified water or distilled water, slowly adding the ground and sieved steam-pressing brick powder, magnetically stirring for modifying for 12-26 h, wherein 0.01-1 parts by mass of calcium hydroxide in added in 1 part by volume of purified water or distilled water, 80-240 parts by mass of pulverized fuel ash steam-pressing brick powder in 1 part by volume of calcium hydroxide solution, the unit of the part by volume is L, and the unit of the part by mass is g; (3) filtering the suspension with filter paper, washing with purified water or distilled water to neutrality to obtain calcium hydroxide modified pulverized fuel ash steam-pressing brick powder; and (4) oven-drying to obtain the final pulverized fuel ash steam-pressing brick modified material. The pulverized fuel ash steam-pressing brick modified material prepared by the preparation method of the invention has the advantages of complete and rapid algae removal and low use amount, and can safely and effectively control algae water bloom and remove the algal toxins in water body.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to calcium hydroxide modified fly ash autoclaved brick powder, which is suitable for removing cyanobacteria and algal toxins in small landscape water bodies where cyanobacteria is the dominant species. Background technique [0002] In many eutrophic water bodies in my country, Microcystis can become the dominant species and can occur throughout the year under suitable climatic conditions, while Microcystis copperaluminum will be released into the water when the cells die or the permeability of the cell membrane increases. Algal toxins lead to an imbalance in the ecosystem, which seriously affects human health and the sustainable development of social economy. [0003] The existing algae control technology has various shortcomings, such as physical algae control methods such as mechanical removal are difficult to apply in large water bodies, and the cost is high; tr...

AI Technical Summary

Problems solved by technology

[0002] In many eutrophic water bodies in my country, Microcystis can become the dominant species and can occur throughout the year under suitable climatic conditions, while Microcystis copperaluminum will be released into the water when the cells die or the permeability of the cell membrane increases. Algae toxins lead to an imbalance in the ecosystem, which seriously affects human health and sustainable socio-economic development

[0003] The existing algae control technology has various shortcomings, such as physical algae control methods such as mechanical removal are difficult to apply in large water bodies, and the cost is high; traditional chemical agents such as heavy metal algicides, oxidants and organic agents, although they can Rapid algae killing, but the secondary pollution of the agent is serious, the ecological risk is high, and with the deepening of the research on algae toxins, the disadvantages of algae toxins released into the water after the addition of traditional algicides have also emerged, so the application is gradually limited