Method for regulating river branch black and odorous water bodies by using graphene modified nano titanium dioxide photocatalyst fiber net

Abstract

The invention discloses a method for regulating river branch black and odorous water bodies by using a graphene modified nano titanium dioxide photocatalyst fiber net. The method comprises the following steps: (1) preparing a reduction-oxidation graphene modified nano titanium dioxide hetero-structure composite photocatalyst; (2) preparing a water-resistant and impact-resistant aluminum-based crosslinking agent to form a homogeneous mixture with the catalyst, adding the homogeneous mixture into fiber stuff for producing a high-density polyethylene fiber net, or also preparing a high-density polyethylene fiber net provided with a nano photocatalysis film coating; (3) performing natural drying in the air, and then performing drying at a constant temperature in a drying room; and (4) arranging the graphene modified nano titanium dioxide photocatalyst high-density polyethylene fiber net on a river branch to contact with the water surface and receive illumination at the same time so as to control the river branch black and odorous water bodies. The method disclosed by the invention does not need aeration oxygenation, is energy-saving and environment-friendly, and is lower in cost and simpler in process.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for using graphene-modified nano-titanium dioxide photocatalyst fiber nets to regulate river black and odorous water bodies. Background technique [0002] Black odor is an extreme phenomenon of organic pollution in water bodies, which is caused by the lack of oxygen in water bodies and the corruption of organic matter. The direct cause of the black and odorous water body is the lack of DO dissolved oxygen, and the discharge of pollutants is the root cause of the black and odorous water body. The phenomenon of river black and odor is actually a biochemical phenomenon, which is the anaerobic decomposition of organic substances in water bodies. It is believed that the oxygen consumption of organic matter in the water body is greater than that of reoxygenation during the decomposition process, resulting in an anoxic environment, and anaerobic microorganisms decompos...

AI Technical Summary

Problems solved by technology

[0008] (2) Ammonia nitrogen and total phosphorus pollution

[0014] (4) Thermal pollution of water body

[0022] 1. The disadvantage of direct aeration by aeration pump is that it consumes a lot of energy, and in the early stage of aeration, there will be a lot of odor emitted, which will affect the normal life of surrounding residents. Citizens have great opinions

Continuous aeration is required 24 hours a day, and the cost of electricity is high

[0023] 2. To increase water replenishment upstream, the disadvantage is that when the river ebbs, the replenished water will flow away

[0025] 4. Planting aquatic plants in the river will affect the original function of the river, and it is easy to breed mosquitoes, and the plants themselves will rot after death and cause secondary pollution.

[0026] 5. Microbial technology can reduce the black and odor of rivers, but it does not last long

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