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Electrodynamic remediation device and method for soil polluted by heavy metal or organic matters

A polluted soil and electrokinetic technology, applied in the field of environmental governance, can solve problems such as low efficiency, slow repair process, and unsatisfactory rapid repair, and achieve high conductivity and accelerated desorption

Active Publication Date: 2013-09-25
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of technology can completely remove pollution in soil and groundwater, but its disadvantage is that it seriously affects the structure of the soil and the ecological environment of the groundwater, and the cost is very high
In comparison, on-site bioremediation technology will not damage the ecological environment, but the restoration process is very slow and inefficient, which cannot meet the needs of rapid restoration; especially in relatively dense soil, active microorganisms, auxiliary agents, etc. Difficult to transport to contaminated areas

Method used

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  • Electrodynamic remediation device and method for soil polluted by heavy metal or organic matters
  • Electrodynamic remediation device and method for soil polluted by heavy metal or organic matters

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The experimental soil was obtained from a polycyclic aromatic hydrocarbon PAH pollutant site, and the soil sample was air-dried and passed through a sieve with an aperture of 2 mm.

[0030] use as figure 1 The shown device is repaired, and the length, width and height of the soil chamber 4 are 25cm, 8.2cm and 6cm respectively. The anode electrode 5 and the cathode electrode 6 all adopt the same graphite electrode, and the length, width and height of the graphite electrode used are 25cm, 8cm and 1.5cm respectively. Adding mass fraction in the anode chamber 2 is the electrolyte of 10% HPCD. Between solid soil and anode electrode 5, add about 1.5cm thick second sand layer 10 (through a sieve with an aperture of 1mm) and 1.5cm thick iron filing layer 8, in order to avoid iron filing layer 8 and anode electrode 5 at the end of repair. Difficult to separate, add a 1cm thick first sand layer 7 between the two, separate the soil from the electrolyte with the anode filter paper...

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Abstract

The invention belongs to the technical field of environmental management, and particularly relates to an electrodynamic remediation device and a method for soil polluted by heavy metal or organic matters. The device is composed of a direct-current power supply, an anode chamber, a gas collecting device, a soil chamber, an anode electrode and a cathode electrode. The device provided by the invention has the advantages that a soil solution which is near the electrode has electrochemistry element reaction under the power-driven pressure, the physicochemical properties such as redox potential and pH value in the coil are changed, the low-permeability soil can have high conductivity through hydroxypropyl-beta-cyclodextrin, and the desorption of the heavy metal or organic matters in a soil solid is accelerated.

Description

technical field [0001] The invention belongs to the technical field of environmental treatment, and in particular relates to an electrodynamic restoration device and method for soil polluted by heavy metals or organic matter. Background technique [0002] Groundwater and soil pollution in my country is quite serious, and the main pollutants are heavy metal ions and toxic and harmful organic substances. According to the survey, more than 50% of urban groundwater is polluted to varying degrees. The main sources of pollution in cities and towns come from industrial production and residential consumption, while soil and groundwater pollution in rural areas are mainly caused by extensive agricultural farming and township industries. Although the focus of my country's environmental work is still the treatment and disposal of wastewater, air and solid waste, as these problems are gradually resolved, the restoration of contaminated soil and groundwater will be given more attention....

Claims

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Application Information

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IPC IPC(8): B09C1/08
Inventor 张一梅张超陆骏卢宏玮
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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