Preparation method of black-odor river sediment covering material

A technology for covering materials and river bottom mud, which is applied in the field of preparation of black and odorous river bottom mud covering materials, can solve problems such as easy to cause anaerobic or facultative anaerobic environment, can not achieve water quality improvement effect, and can not be realized at the same time, to achieve construction Convenience, low cost, large specific effect

Inactive Publication Date: 2018-01-05
HUATIAN ENG & TECH CORP MCC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, most of the current masking materials are inorganic sand, which has small specific surface area, poor adsorption performance, and poor structure. It cannot simultaneously realize the treatment of heavy metals, N, P and other nutrients and refractory organic matter, and it is easy to cause anaerobic Or facultative anaerobic environment, unable to achieve long-term water quality improvement effect

Method used

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  • Preparation method of black-odor river sediment covering material
  • Preparation method of black-odor river sediment covering material
  • Preparation method of black-odor river sediment covering material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The present embodiment provides a method for preparing a black and odorous river channel bottom mud covering material, comprising the following steps:

[0030] (1) mix 100 parts by mass of fly ash and 10 parts by mass of polylactic acid-coated calcium peroxide, and stir at 90-150 rpm for 15-30min, so that the surface of the oxygen slow-release material is wrapped by fly ash to obtain the first mixed material ;

[0031] (2) the first mixed material is mixed with silicate, and stirred at 90-150rpm for 15-30min to obtain the second mixed material;

[0032] (3) adding 40 parts by mass of water to the second mixed material obtained in step (2) and stirring to obtain a mixture, which is loaded into a honeycomb die and extruded to obtain a solidified body precursor of a honeycomb structure;

[0033] (4) air-drying the cured body precursor in the step (3) in a natural state for one week to obtain a cured body;

[0034] (5) The solidified body obtained in step (4) is heated un...

Embodiment 2

[0036] (1) 100 parts by mass of fly ash and 10 parts by mass of polylactic acid wrapped calcium peroxide and magnesium peroxide mixture are mixed, and stirred at 90-150rpm for 15-30min, so that the surface of the oxygen slow-release material is wrapped by fly ash, to obtain the first mixed material;

[0037] (2) the first mixed material is mixed with 30 parts by mass of active magnesium oxide, and stirred for 15-30min at 90-150rpm to obtain the second mixed material;

[0038] (3) adding 50 parts by mass of water to the second mixed material obtained in the step (2) and stirring to obtain a mixture, and packing the mixture into a honeycomb die for extrusion molding to obtain a solidified body precursor of a honeycomb structure;

[0039] (4) air-drying the cured body precursor in the step (3) for one week in a natural state to obtain a cured body with a size of 10 mm;

[0040] (5) The solidified body obtained in the step (4) is heated under the protection of nitrogen, placed in...

Embodiment 3

[0061] Use the covering material A to repair the black and odorous river sediment; obtain 20 kg of sediment and record the sludge and water quality parameters (Table 2), pour the sludge into a drum, the thickness of the mud is about 40cm, and then pour the Contaminated clean water, the water surface is 40cm away from the upper surface of the sediment. After the water is stabilized, the surface is evenly scattered with covering material A2KG to form a covering layer with a thickness of about 2cm. After three months, the water quality changes are observed, and the results are recorded in Table 3; Sediment, test the parameters of the sediment, see Table 4.

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Abstract

The invention discloses a preparation method of a black-odor river sediment covering material. The preparation method comprises the following steps: (1) mixing and stirring fly ash and an oxygen sustained-release material at a preset proportion to obtain a first mixed material; (2) mixing the first mixed material with a solidifying material, and stirring to obtain a second mixed material; 3) adding water to the second mixed material obtained in the step (2), stirring to obtain a mixture, and extruding and granulating the mixture to obtain a solidified body precursor; (4) air-drying the solidified body precursor in the step (3) in a natural state to obtain a solidified body; (5) heating the solidified body obtained in the step (4) under protection of nitrogen, and naturally cooling to obtain the covering material. The preparation method of a black-odor river sediment covering material, provided by the invention, prepares the covering material by using the fly ash as a main body and combining with the oxygen sustained-release material and the solidifying material through a special process; the covering material has a good treatment effect on heavy metals, N, P and other nutrients andrefractory organic matters released by the sediment.

Description

technical field [0001] The invention belongs to the field of water environment treatment, in particular to a preparation method of a black and odorous river channel bottom mud covering material. Background technique [0002] In order to reduce the sediment is an important reservoir of pollutants, the main pollutants accumulated are heavy metals, N, P and other nutrients and refractory organics, the content of which can reach hundreds of times in the water body, and maintain a certain dynamic balance with the water phase. . 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00B01J20/10B01J20/28B01J20/30C02F101/10C02F101/16C02F101/20C02F101/30
Inventor 高卫民程寒飞孟溪骆守鹏项萌李明朱巧红冉景夏溢
Owner HUATIAN ENG & TECH CORP MCC
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