Preparation method of novel light bottom mud covering material and riverway bottom mud repairing method

Abstract

The invention relates to a preparation method of a novel light bottom mud covering material and a riverway bottom mud repairing method. The magnetic adsorption material is prepared from the followingcomponents in parts by weight: 100 parts of an inorganic binder, 0.1 to 10 parts of an organic binder, 100 to 1000 parts of a magnetic adsorption material, 0.1 to 10 parts of reinforced fibers, 0.5 to5 parts of foaming particles and 0.1 to 10 parts of a catalytic material. All the components are stirred, mixed, granulated and naturally cured to obtain the product. The prepared covering material has the particle size of 5-50mm, is slightly alkaline, and is beneficial to improving the acidic microenvironment of bottom mud; the specific surface area is large, the adsorption capacity is high, andespecially the adsorption effect on phosphorus is good; the strength is high; the weight is light, the specific gravity is controllable, and the optimal covering effect is achieved; the growth and biofilm formation of microorganisms are promoted, and the long-term sediment inhibition and water quality purification effects are improved. The bottom mud covering material and the preparation processthereof are simple, low in cost and suitable for large-scale production and application.

Description

technical field [0001] The invention belongs to the field of water environment treatment, and in particular relates to a preparation method of a novel light-weight bottom mud covering material and a river channel bottom mud restoration method. Background technique [0002] The sediments of rivers and lakes are important reservoirs of pollutants. The main pollutants accumulated are heavy metals, nutrients such as N and P, and refractory organics. When environmental conditions change, pollutants in the sediment may be released to re-contaminate the water body. Therefore, the polluted sediment has seriously threatened human health and the world's environment, and the treatment of the polluted sediment is urgent. [0003] At present, the pollution control technology mainly includes two categories: in-situ treatment technology and ex-situ treatment technology. The in-situ treatment technology is to leave the polluted sediment in place and take measures to prevent the sediment p...

AI Technical Summary

Problems solved by technology

However, most of the current masking materials are inorganic sandstone, which has a wide range of sources and low cost, but it has a large proportion, is easy to fall into the sediment and is covered by the sediment, has a small specific surface area, poor adsorption performance, is not conducive to the growth of microorganisms, and has a slow growth rate. , and easy to fall off, non-functional, easy to cause anaerobic or facultative anaerobic environment, unable to achieve long-term inhibition of sediment pollutant release and water quality improvement effect

CN 102617089A reports the covering material prepared by cement curing material, but the alkalinity is too strong, which will cause secondary pollution to the water body, and the specific surface area is small, the adsorption is poor, the specific gravity is large, the requirement for the bearing capacity of the bottom mud is high, and the bottom mud is easy to deposit , can not play a covering role

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