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Regeneration method and circulating restoration device for organic contaminated soil restoration eluate

A soil remediation and organic pollution technology, applied in the field of contaminated soil remediation, can solve problems such as the inability to recycle the eluent well, achieve good elution effect, reduce total water consumption, and reduce costs.

Inactive Publication Date: 2012-12-19
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the fact that the existing soil leaching technology cannot recycle the eluent well, the present invention provides an effective eluent regeneration cycle leaching method

Method used

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  • Regeneration method and circulating restoration device for organic contaminated soil restoration eluate
  • Regeneration method and circulating restoration device for organic contaminated soil restoration eluate
  • Regeneration method and circulating restoration device for organic contaminated soil restoration eluate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Experiment preparation

[0025] 1.1 Sampling

[0026] The soil was uncontaminated soil, air-dried naturally in the shade and removed stones, plant roots, etc., and then passed through a 2-mm soil sieve. The basic physical and chemical properties of the soil are organic matter content of 2.67%, pH value of 8.2, soil particle size distribution of 42.6% gravel (>63μm), 28.9% coarse sand (21-62μm), 27.3% fine sand, silt (2-20μm) and 1.2% cosmids (<2 μm).

[0027] 1.2 Experimental design

[0028] Soil column preparation: fill the glass column with air-dried soil particles, fill the upper and lower layers of sand and gravel, separate the sand and gravel layer from the soil particle layer with filter paper, and place a sand core at the entrance and exit of the soil column; adjust the soil moisture Make it saturated; simulate point source pollution to make the content of HOCs pollutant toluene in soil 790mg / Kg.

[0029] Wash and repair the polluted soil, pump (6) figure...

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Abstract

The invention relates to a regeneration method and a circulating restoration device for an organic contaminated soil restoration eluate. According to the invention, the theory is as follows: on the basis of free-radical oxidation of sulfate radicals, hydrophobic organic matters in the eluate are selectively and preferably degraded. The method and the device can be used for preferably degrading pollutants in the eluate during the organic contaminated soil eluting restoration process, so that the eluate can be regenerated and recycled, and the defects of a traditional leaching process can be well solved; the regeneration of the eluate in a hydrophobic organic contaminated soil eluting restoration technology is realized, repeated eluting can be carried out, the regenerative recycling of the eluate in the eluting process is realized, the total water consumption and surfactant consumption for soil eluting can be greatly reduced, the soil restoration cost is lowered, and secondary pollution cannot be caused.

Description

technical field [0001] The invention belongs to the technical field of remediation of contaminated soil, and in particular relates to a method for regenerating eluate for remediation of organic polluted soil and a circulation remediation device. Background technique [0002] Hydrophobic organic compounds (HOCs), such as polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and aromatic compounds (such as benzene, toluene, ethylbenzene, and xylene, BTEX) in the environment, generally have a large Octanol / water partition coefficient (K ow ), low water solubility, strong mobility, fat solubility and toxicity at the same time, it is a dangerous environmental toxic carcinogen, which can produce biological toxicity even at very low concentrations. At present, due to the rapid development of industrial and agricultural production, they are widely distributed in environmental media such as surface water, soil and sediment, groundwater, and the atmosphere, and t...

Claims

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Application Information

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IPC IPC(8): B09C1/08
Inventor 张晖龙安华张道斌
Owner WUHAN UNIV
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