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A kind of novel sediment solidification agent and preparation method thereof

A curing agent and bottom sludge technology, which is applied in the direction of dehydration/drying/thickened sludge treatment, etc., can solve the problems of secondary pollution and high cost

Active Publication Date: 2017-01-25
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sediment translocation control technology is to excavate the polluted sediment and transport it to other places for treatment, that is, to transfer the internal pollution source of the water body to prevent the pollution of the water body, mainly including sediment dredging, ectopic leaching, and isolation disposal site technology etc. The cost of this technology is high, and it is easy to cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Mix 60 parts of methyl acrylate and 220 parts of water, heat up to 40°C, stir to mix, continue to heat up the mixture to 60-80°C, then add 40 parts of vinyl acetate, 4 parts of acrylic acid, and benzyl peroxide 0.28 parts of acyl, keep warm for 2-8h, heat up to 90-95°C again, keep warm for 1h, then cool to 40°C and discharge to obtain polymer;

[0015] After washing the above-mentioned polymer with deionized water, dry it at 60°C for 6-8 hours, mix the dried polymer with methanol aqueous solution of sodium hydroxide at a mass ratio of 1:0.5, and dry it at 60-65°C Stir for 5-6 hours, and obtain the bottom sludge curing agent after suction filtration, washing and drying under reduced pressure.

Embodiment 2

[0017] Mix 50 parts of methyl acrylate and 200 parts of water, heat up to 40°C, stir to mix, continue to heat up the mixture to 60-80°C, then add 50 parts of vinyl acetate, 3 parts of acrylic acid, N,N- 0.25 parts of dimethylformamide, keep warm for 2-8h, heat up to 90-95°C again, keep warm for 1h, then cool to 40°C and discharge to obtain a polymer;

[0018] After washing the above-mentioned polymer with deionized water, dry it at 60°C for 6-8 hours, mix the dried polymer with methanol aqueous solution of sodium hydroxide at a mass ratio of 1:0.3-0.8, Stir at ℃ for 5-6h, and get the bottom sludge curing agent after suction filtration, washing and drying under reduced pressure.

Embodiment 3

[0020] Experimental test on sediment nutrient solidification

[0021] The sediment nutrient salt solidification experiment of the present invention is carried out with the bottom mud of the Xiangxi River Bay of the Three Gorges Reservoir as an object. Xiangxi River is located in the west of Hubei Province, on the north side of Xiling Gorge of the Yangtze River, at 110°25′-110°00′ east longitude and 30°38′-31°34′ north latitude. The Xiangxi estuary is about 29km away from the Three Gorges Dam, and is the largest tributary in Hubei Province in the Three Gorges reservoir area. After the water storage of the Three Gorges Dam reached the design water level, the section above Xiangxi Township and the upstream section of Baisha River were submerged by backwater, forming the Xiangxi River Reservoir Bay, and the water depth increased significantly. Affected by the backwater jacking of the reservoir, the water level rises, the flow velocity slows down, and the hydrological environmenta...

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Abstract

The invention discloses a novel sediment solidifying agent and a preparation method thereof. The preparation method comprises the following steps: by using methyl acrylate and vinyl acetate as raw materials, adding acrylic acid and an initiator, carrying out suspension polymerization, washing with water, drying and hydrolyzing to obtain the novel sediment solidifying agent. The sediment solidifying agent has the characteristics of no toxicity, environment friendliness and certain viscosity, can expand after absorbing water, can well solidify the sediment and adsorb nutritive salts released by the sediment, and has the advantages of wide raw material sources, simple preparation method and lower cost.

Description

technical field [0001] The invention relates to the technical field of curing nutrient salts of polluted bottom mud, in particular to a novel bottom mud curing agent and a preparation method thereof. Background technique [0002] Sediment generally refers to the sediments of rivers, lakes and seas, and is an important part of natural waters. When the surface water body is seriously polluted, some pollutants in the water will be stored in the sediment through sedimentation or adsorption by particulate matter. Sediment is a huge potential source of pollution to surface water bodies. Under appropriate conditions, pollutants may be re-released and become secondary sources of pollution. [0003] Sediment pollution control technologies mainly include: sediment translocation control technology and sediment in-situ control technology. Sediment translocation control technology is to excavate the polluted sediment and transport it to other places for treatment, that is, to transfer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F218/08C08F220/06C02F11/14
Inventor 罗华军黄应平刘德富
Owner CHINA THREE GORGES UNIV
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