Preparation method and application method of silicon dioxide cluster-based novel settling agent

Abstract

The invention discloses a preparation method and an application method of a silicon dioxide cluster-based novel settling agent. Silicon dioxide clusters serve as settling agent main bodies, and metalions and the silicon dioxide clusters are combined by utilizing the strong interaction between the silicon dioxide clusters and the metal ions, so that a metal ion modified settling agent is obtained,and the content of metal ion residues such as aluminum ions in the treated water body can be reduced; the settling agent provided by the invention can be selectively combined with blue-green algae, so the influence on other aquatic organisms is greatly reduced; the density of the final settling material can be adjusted by adjusting the polymerization degree or grain size of the silicon dioxide clusters in the settling agent and the metal content, the prepared settling material can float on the water surface and also can sink into the water bottom, and different salvage treatment requirementscan be met; and the settling agent provided by the invention is faintly acidic, so the living environment of the blue-green algae can be broken by a mode of reducing the pH value of the water body while the blue-green algae are settled, and the growth of the blue-green algae can be inhibited.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a preparation method and an application method of a novel sedimentation agent based on silica clusters. Background technique [0002] With the rapid development of China's economy, environmental issues are increasingly concerned. However, in recent years, the pollution of freshwater lakes has become increasingly serious. China's lakes cover an area of ​​78,000 square kilometers, of which 92% of large and medium-sized lakes tend to be eutrophic. In addition, my country's aquaculture area is 81,000 square kilometers, and there are often problems of eutrophication. The eutrophication of water bodies is often accompanied by the outbreak of blue-green algae, known as cyanobacterial blooms. [0003] Cyanobacteria blooms seriously damage the ecological environment of water bodies, and the toxins released by cyanobacteria pose a serious threat to humans and animals. Removing...

AI Technical Summary

Problems solved by technology

But these inorganic salt flocculants also have the following disadvantages: 1) the residual content of metal ions in the water body after the existing flocculant treatment is high, causing secondary pollution, especially aluminum ions, which can cause stomach problems, kidney diseases, and nervous system diseases

2) The flocs produced by the existing flocculants have low density and often float on the water surface. Therefore, it is not easy to collect and deal with some water surfaces with many obstacles. At the same time, a large number of floating objects will block the sunlight, affect the growth of underwater organisms, and destroy the ecological balance.

3) The existing flocs are usually clusters of jelly, non-selective adhesion, and may also cause harm to beneficial aquatic organisms

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