Bed mud in-situ repair particle, preparation method, usage method and application thereof

Abstract

The invention discloses a bed mud in-situ repair particle, a preparation method, usage method and application thereof. The bed mud in-situ repair particle is prepared from the following components inparts by weight: 0.02-0.03 parts of polyvinyl alcohol, 2-3 parts of oxygen release agent, 2-4 parts of zeolite powder, 1-1.5 parts of ferrous sulfate, and 0.5-1.5 parts of bentonite. The preparation method specifically comprises the following steps of S1, preparing a polyvinyl alcohol solution; S2, weighing and mixing the raw materials uniformly; and S3, drying the prepared repair particles and storing the particles in a dryer. Per square meter of bed mud needs 300g-600g of repair agent according to the surface area of the bed mud, and the valid period is 30-120 days. The bed mud in-situ repair particle reduces the impact of alkali matters in the oxygen release agent on metabolism of microorganisms, improves the use efficiency of peroxides, converts refractory organic matters in the bed mud into an intermediate product easier to be used by microorganisms, removes removal rate of bed mud COD (chemical oxygen demand), inhibits nitrogen and phosphorus in the bed mud from releasing, and can repair bed mud contaminated by surface water body in-situ.

Description

technical field [0001] The invention relates to the technical field of bottom mud restoration in water environment, specifically, a kind of bottom mud in-situ restoration particle and its preparation method, use method and application. Background technique [0002] The bottom sediment of a water body is the product of urban development and evolution, and the bottom mud maintains the exchange of matter and energy with the overlying water at all times. Moreover, the bottom mud is also the place where benthic animals and microorganisms live, and the substrate for the growth of aquatic plants. As an important link in the material and energy cycle in the water ecosystem, the sediment also plays a certain role in improving the quality of the overlying water. Pollutants discharged into the surface water body will undergo microbial degradation, chemical reaction, and physical adsorption in the sediment to reduce the pollution level of the surface water body, reduce the pollutant lo...

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Problems solved by technology

[0005] The limitations of the in-situ covering method of sediment: the covering technology can control the water quality well, but the pollutants remain in the sediment; this method will cause potential damage to the water environment and benthic environment where the organisms exist; the excavation of the bottom organisms in the sediment Activities can damage cover materials, causing release of pollutants

[0007] Limitations of phytoremediation: phytoremediation is affected by the environment and climate, with slow growth and long treatment cycle; sites with high pollutant content will inhibit the growth of plants and limit its treatment of pollutan

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