Composite material for removing alga-derived odorous substances in black and odorous water, and preparation method and application thereof

Abstract

The invention discloses a composite material for removing alga-derived odorous substances in black and odorous water, and a preparation method and an application thereof. The composite material is composed of an oxygen releasing agent and an embedding agent. The preparation method comprises the following steps: (1) uniformly mixing the oxygen releasing agent, bentonite, sodium alginate and polyvinyl alcohol according to a certain ratio, adding deionized water, and performing stirring, wherein the oxygen releasing agent is one of calcium peroxide, magnesium peroxide and sodium peroxide; (2) tabletting the obtained mixture in a tabletting machine, and drying the mixture to prepare an oxygen slow-release material for later use; (3) adding a proper amount of potassium ferrate into the black and odorous water, adjusting the pH value, stirring for a reaction, and standing for precipitation; and (4) adding a proper amount of the oxygen slow-release material into the black and odorous water. The composite material has the advantages of reasonable formula, low cost, environmental friendliness, easiness in method implementation, simplicity in operation, effectiveness in absorption and flocculation of various inorganic and organic pollutants in the black and odorous water, inhibition of harmful algae, elimination of peculiar smell, and solving of the problem of insufficient dissolved oxygen in the black and odorous water.

Description

technical field [0001] The invention belongs to the technical field of water restoration, and more specifically relates to a composite material for controlling black and odorous rivers, a preparation method of the composite material for controlling black and odorous rivers, and an application of the composite. Background technique [0002] With the rapid development of the economy, the problem of urban water environment is becoming more and more serious. Among them, the phenomenon of black and odorous urban water body has become one of the water environment problems that the public pays more attention to after the smog problem. The blackening of black and odorous water is mainly due to the high organic pollution load of the water body, which consumes a large amount of dissolved oxygen when decomposing organic pollutants, which leads to the anaerobic state of the water body and the decrease of the oxidation-reduction potential, forming a highly reducing environment. Fe in abu...

AI Technical Summary

Problems solved by technology

At present, the main means of oxygenation of water body is aeration and oxygen supply and adding oxygen-releasing materials. The aeration and oxygen supply is mainly through the aeration device to make the water body contact with the air to oxygenate. However, the aeration equipment is expensive and requires continuous operation of the equipment. , the cost is high; the oxygen-releasing material is to use the characteristics of the oxygen-releasing compound to react or decompose in water to generate oxygen to supply oxygen to the water body. The commonly used oxygen-releasing agents include calcium peroxide, magnesium peroxide and sodium peroxide, etc., but directly Putting the oxygen releasing agent into the water will cause the oxygen release rate to be fast and the pH to rise sharply, which cannot release oxygen for a long time, and will also cause secondary pollution

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