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Enclosed remediating device and remediating method for contaminated soil

A technology for polluted soil and remediation methods, applied in the field of biological comprehensive remediation cycle devices, can solve the problems of long-term bioremediation effect and poor controllability.

Pending Publication Date: 2018-11-16
SHANGHAI ACADEMY OF LANDSCAPE ARCHITECTURE SCI & PLANNING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bioremediation effects often take a long time and are less controllable

Method used

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  • Enclosed remediating device and remediating method for contaminated soil

Examples

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Effect test

Embodiment 1

[0016] A closed repair device for polluted soil, at least three sealed boxes are connected in series, the bottom of the sealed box is connected to the collection box, the collection box is connected to the storage box and then connected to the water treatment system, and the water treatment system is connected to the spray pipe. The connection between the bottom of the sealed box and the collection box is provided with porous permeable bricks; the sealed box is a cement or PVC sealed box. The porous water-permeable brick mixture of rapeseed and corn crop stalks is calcined at 500°C to obtain particles with a particle size of less than 5 μm, and then vibrated to form a brick shape.

Embodiment 2

[0018] A method for soil remediation by a closed repair device for contaminated soil. In the sealed box, biochar and inorganic improvement materials are added to the contaminated soil to be repaired, mixed and stirred evenly, and compacted and vibrated. The layer height is 45cm; the polluted soil outside the airtight container is covered with a layer of 50cm thick greening planting soil; the upper part of the greening planting soil layer is configured according to the landscape requirements, and the artificial rainfall is simulated every 30 days to saturate the contaminated soil layer to be repaired. . The biochar is a mixture of rapeseed and corn crop stalks calcined at 500°C with a particle size of less than 5 μm, and the inorganic improvement material is CoMoS 4 、Cu 2 MoS 4 With a mixture of mass ratio 1:0.85, the mass ratio of biochar and inorganic improvement material is 1:0.6; the amount of biochar and inorganic improvement material is 0.48kg / square. The landscape pla...

Embodiment 3

[0020] A method for soil remediation by a closed repair device for contaminated soil. In the sealed box, biochar and inorganic improvement materials are added to the contaminated soil to be repaired, mixed and stirred evenly, and compacted and vibrated. The layer height is 45cm; the polluted soil outside the airtight container is covered with a layer of 50cm thick greening planting soil; the upper part of the greening planting soil layer is configured according to the landscape requirements, and the artificial rainfall is simulated every 30 days to saturate the contaminated soil layer to be repaired. . The biochar is a particle with a particle size of less than 3.5 μm obtained by calcination at 580° C. after drying the sludge in a lotus root pond, and the inorganic improvement material is NiMoS 4 、Cu 2 MoS 4 With the mixture of mass ratio 1:0.68, the mass ratio of biochar and inorganic improvement material is 1:0.5; the amount of biochar and inorganic improvement material is...

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Abstract

The invention provides an enclosed remediating device for contaminated soil. The enclosed remediating device comprises at least three sealed boxes which are connected in series, wherein the bottom part of each sealed box is connected with a collection box; collection boxes are connected with a storage box before connection to a water treatment system; the water treatment system is connected with aspray pipe; and the joints of the bottom parts of the sealed box and the collection boxes are provided with porous water-permeable bricks. The method for remediating soil with the device provided bythe invention comprises the following steps: adding biochar and an inorganic improved material into to-be-remediated contaminated soil in the sealed boxes, carrying out uniform mixing under stirring,and carrying out compaction by pressing and vibration so as to obtain a to-be-remediated contaminated soil layer with a height of 30 to 60 cm; covering the contaminated soil located out of a sealed container with a layer of greening planting soil having a thickness of at least 50 cm; and planting landscape plant communities on the upper part of a greening planting soil layer according to landscapedemands, and simulating artificial rainfall once every 25 to 35 days until the to-be-remediated contaminated soil layer is completely impregnated. As the enclosed remediating device and the remediating method in a technical scheme of the invention are applied to soil seriously contaminated by petroleum hydrocarbons, the concentration of the petroleum hydrocarbons in the soil is reduced from 50 to80 g / kg to 40 mg / kg or below.

Description

technical field [0001] The invention relates to the fields of landscaping and environmental pollution restoration, and relates to a bio-comprehensive remediation cycle device, specifically a cycle device for carrying out closed soil pollution bio-comprehensive remediation by using plants, microorganisms and biochar. Background technique [0002] Bioremediation refers to all environmental pollution control technologies that use organisms as the main body. It includes the use of plants, animals and microorganisms to absorb, degrade, and transform pollutants in soil and water, reducing the concentration of pollutants to an acceptable level, or converting toxic and harmful pollutants into harmless substances, and also includes converting Stabilization of pollutants to reduce their diffusion into the surrounding environment. Bioremediation effects often take a long time and are less controllable. Contents of the invention [0003] This patent builds a contaminated soil sealin...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/08B09C1/105B09C2101/00
Inventor 张浪郑思俊梁晶李跃忠富婷婷朱义方海兰李晓策谢倩
Owner SHANGHAI ACADEMY OF LANDSCAPE ARCHITECTURE SCI & PLANNING