Covering carpet for repairing degradation-resistant organic substance contaminated sediment in situ and laying method of covering carpet

A technology for refractory organic matter and polluted sediment, applied in the direction of water pollutants, sludge treatment, chemical instruments and methods, etc., can solve the problems of large changes in the original ecological environment, complex engineering operations, low repair efficiency, etc., to promote degradation , increase the specific surface area, the effect of easy construction

Active Publication Date: 2017-12-08
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of complex engineering operation, low restoration efficiency, and large changes to the original ecological environment existing in the existing in-situ physical coverage treatment technology, the present invention proposes an in-situ restoration refractory to degradation that is flexible, easy to operate, efficient, and has little impact on the ecological environment. A covering blanket for organic matter polluted bottom mud, and a method for laying the covering blanket is provided at the same time

Method used

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  • Covering carpet for repairing degradation-resistant organic substance contaminated sediment in situ and laying method of covering carpet
  • Covering carpet for repairing degradation-resistant organic substance contaminated sediment in situ and laying method of covering carpet
  • Covering carpet for repairing degradation-resistant organic substance contaminated sediment in situ and laying method of covering carpet

Examples

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Embodiment 1

[0062] Select the contaminated sediment with a total PCB amount of 2.0mg / kg and place it at the bottom of a circular plastic bucket with a radius of 35cm, and the laying height is 15cm. The cover blanket of the present invention is laid on the upper part of the bottom mud, wherein the thickness of the adsorption filler layer is 0.2cm, bentonite, G 12-6-12 The mass ratio of zirconium oxychloride octahydrate to zirconium oxychloride is 1:2:2; the thickness of solubilization layer is 0.6cm, and the mass ratio of rhamnolipid, montmorillonite and activated carbon is 1:12:6. The upper layer of the covering blanket is covered with 20cm of fine sand and 5cm of pebbles, and then a certain amount of deionized water is added to simulate the overlying water, so that the height of the overlying water reaches 50cm. A blank control group with no coverage process was set up under the same conditions as other conditions. The overlying water was taken at 5cm below the water surface at 90 days ...

Embodiment 2

[0064] Select the polluted sediment with a total amount of benzopyrene of 1.5 mg / kg and place it at the bottom of a circular plastic bucket with a radius of 35 cm, and the laying height is 15 cm. The covering blanket of the present invention is laid on the upper part of the bottom mud, wherein the thickness of the adsorption filler layer is 0.1cm, bentonite, G 12-6-12 The mass ratio of zirconium oxychloride octahydrate to zirconium oxychloride is 1:1.5:3; the thickness of the solubilizing layer is 0.5cm, and the mass ratio of rhamnolipid, montmorillonite and activated carbon is 1:10:5. The upper layer of the covering blanket is covered with 20cm of fine sand and 5cm of pebbles, and then a certain amount of deionized water is added to simulate the overlying water, so that the height of the overlying water reaches 50cm. A blank control group with no coverage process was set up under the same conditions as other conditions. The overlying water was taken at 5cm below the water su...

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Abstract

The invention discloses a covering carpet for repairing degradation-resistant organic substance contaminated sediment in situ and a laying method of the covering carpet. The covering carpet comprises a bottom layer, a lower layer, an upper layer and a surface layer from bottom to top in sequence, wherein the bottom layer is made of nonwoven geotextile, the lower layer is a solubilizing layer, the upper layer is an adsorption filler layer, the surface layer is woven geotextile, the solubilizing layer adopts filler mixed by rhamnolipid-modified montmorillonite and active carbon, the adsorption filler layer adopts a quaternary ammonium salt type surfactant and organic bentonite modified by zirconium oxychloride octahydrate. The laying method of the covering carpet comprises the following steps: directly laying the covering carpet on contaminated sediment, connecting adjacent covering carpet units through stubble, and additionally arranging a fine sand layer on the covering carpet. The filler is mixed by the rhamnolipid-modified montmorillonite and the active carbon, so that degradation of degradation-resistant organic substances is promoted; modified organic bentonite is adopted as the adsorption filler layer, so that adsorption capacity on organic pollutants in water is relatively strong; and the laying mode is flexible, construction is simple and convenient, and the living environment of bentonic organisms is not damaged.

Description

technical field [0001] The invention relates to a covering material for in-situ repairing of bottom mud polluted by refractory organic matter, and belongs to the technical field of water body bottom mud pollution restoration. Background technique [0002] Sediment is an important part of the water ecological environment system, and it is also the most important reservoir of water pollutants, enriching a large number of pollutants, such as heavy metals, nutrients such as nitrogen and phosphorus, and refractory organic pollutants. Pollutants in sediment, especially refractory organic matter, can further affect the health of terrestrial organisms and human beings through processes such as bioaccumulation and biomagnification. Therefore, the remediation of refractory organic matter in sediment is one of the environmental problems that need to be solved urgently. Refractory organics in the substrate include polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs...

Claims

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Application Information

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IPC IPC(8): C02F11/00B01J20/20B01J20/22B01J20/30C02F1/28E02B3/12C02F101/30
CPCB01J20/20B01J20/22C02F1/285C02F11/00C02F2101/30E02B3/122E02B3/123
Inventor 张彦浩张昊晗张志斌孙翠珍夏四清朱广伟彭岩波李海翔曹国勋崔万里王晓栋
Owner SHANDONG JIANZHU UNIV
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