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Photocatalytic treatment device for chlorinated aromatic organic matter polluted soil remediation leacheate and photocatalytic composite board special for device

A soil leaching and photocatalysis technology, which is applied in the restoration of polluted soil, light water/sewage treatment, physical/chemical process catalysts, etc., can solve the problem of difficult treatment of eluent, achieve good loading effect and improve absorption ability, the effect of increasing photocatalytic activity

Inactive Publication Date: 2017-01-04
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is how to use sunlight energy to photocatalytically degrade the target pollutants in the soil remediation eluate, so as to overcome the disadvantage that the eluate is difficult to handle in the existing leaching technology

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  • Photocatalytic treatment device for chlorinated aromatic organic matter polluted soil remediation leacheate and photocatalytic composite board special for device
  • Photocatalytic treatment device for chlorinated aromatic organic matter polluted soil remediation leacheate and photocatalytic composite board special for device
  • Photocatalytic treatment device for chlorinated aromatic organic matter polluted soil remediation leacheate and photocatalytic composite board special for device

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Embodiment Construction

[0048] The present invention will be described below through specific examples, but the present invention is not limited thereto.

[0049] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.

[0050] figure 1 The invention provides a photocatalytic treatment device for chlorinated aromatic organic compound polluted soil remediation eluent. The device includes a soil washing system, an inlet for adding eluent to be treated, a photocatalytic main reaction pool, a graphene-titanium dioxide nanotube photocatalytic composite plate, and an outlet for reusing eluent. It is characterized in that: the soil leaching system is a four-stage reverse flow soil leaching system, the contaminated soil is firstly subjected to the first-stage soil leaching restoration (1) in the soil leaching system, and then the s...

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Abstract

The invention provides a photocatalytic treatment device for chlorinated aromatic organic matter polluted soil remediation leacheate. The photocatalytic treatment device comprises a to-be-treated leacheate feeding inlet, a phtocatalytic main body reaction tank, a graphene-titanium dioxide nanotube photocatalytic composite board and a reused leacheate outlet. The graphene-titanium dioxide nanotube photocatalytic composite board is prepared through a sol-gel method, a surface catalyst is uniform in load property, high in light absorption rate, the catalyst is not prone to disengagement, efficient adsorption, capture, degradation and mineralization can be conducted on target pollutants in a leacheate system under the light condition, the pollutants are removed first and then controlled, and rapid treatment of the leacheate is promoted. Due to the fact that the leacheate can be reused in the sol leaching step after being rapidly and efficiently treated through the phtocatalytic reaction tank, the total dosage of the leacheate is decreased, and pollution of the leacheate to the environment is reduced.

Description

technical field [0001] The invention belongs to the technical field of remediation of soil polluted by chlorinated aromatic organic substances, and in particular relates to a photocatalytic treatment device for remediating eluent of soil polluted by chlorinated aromatic organic substances and a special photocatalytic composite board. Background technique [0002] According to the "National Soil Pollution Survey Bulletin" released by the Ministry of Environmental Protection and the Ministry of Land and Resources in 2014, the total exceeding rate of soil pollution in the country was 16.1%. Among them, the investigation of soil organic pollutants on H66, DDT and polycyclic aromatic hydrocarbons showed that the over-standard rates of these three types of organic pollutants on the surface were 0.5%, 1.9% and 1.4% respectively. [0003] Remediation of POP-contaminated soils has been a daunting task for decades. Among them, chlorinated aromatic organic pollutants enter the environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18C02F1/30B09C1/02
Inventor 王洪涛周泽宇
Owner TSINGHUA UNIV
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