Anaerobic-aerobiotic repairing method of TNT (Trinitrotoluene) contaminated soil

A technology for polluted soil and remediation methods, applied in the field of anaerobic-aerobic remediation, can solve problems such as no better, and achieve the effects of easy conversion, safe and reliable water sealing, and good remediation effect

Inactive Publication Date: 2013-06-12
LOGISTICAL ENGINEERING UNIVERSITY OF PLA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no better way to remediate TNT-contaminated soil

Method used

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  • Anaerobic-aerobiotic repairing method of TNT (Trinitrotoluene) contaminated soil
  • Anaerobic-aerobiotic repairing method of TNT (Trinitrotoluene) contaminated soil
  • Anaerobic-aerobiotic repairing method of TNT (Trinitrotoluene) contaminated soil

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The concentration of pollutants in a polluted soil is (1000.24±105.56) mgTNT / kg soil, and the pollution is concentrated in the soil 20cm away from the surface. Now adopt the embodiment of the present invention to remediate its polluted soil. At the same time, take another portion of TNT-contaminated soil in the polluted site and add inactivated sludge as the control group. TNT was determined by HPLC method, and a total of 10 samples were collected in each group for analysis and then the average was calculated.

[0034] Excavate the surface polluted soil, air-dry, grind into granules, pass through a 2cm sieve,

[0035] Take the above-mentioned anaerobic-aerobic compatible reactor with a volume of 5L (20cm high, 18cm internal diameter), close the air compressor 4 of the anaerobic-aerobic biological sludge reactor, and seal the aeration inlet 11-b , and connect the water seal 14, then fill nitrogen therein, and add sterile deoxygenated water, after the oxygen in the reac...

Embodiment 2

[0039] The TNT concentration in the soil near a TNT production factory is 3000±130mg / kg soil, and the pollution is concentrated in the soil 25cm away from the surface. Now adopt the embodiment of the present invention to remediate its polluted soil. At the same time, take another portion of TNT-contaminated soil in the polluted site and add inactivated sludge as the control group. TNT was determined by HPLC method, and a total of 10 samples were collected in each group for analysis and then the average was calculated.

[0040] Excavate the surface polluted soil, air-dry, grind into granules, pass through a 2cm sieve,

[0041] Take the above-mentioned anaerobic-aerobic compatible reactor with a volume of 20L (20cm high, 18cm inner diameter), close the air compressor 4 of the anaerobic-aerobic biological sludge reactor, and seal the aeration inlet 11-b , and connect the water seal 14, then fill it with nitrogen, and add sterile deoxygenated water, after the oxygen in the react...

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Abstract

The invention discloses an anaerobic-aerobiotic repairing method of TNT (Trinitrotoluene) contaminated soil. The method comprises the following steps of: trimming soil to be repaired; anaerobic repairing and aerobiotic repairing. The step of trimming soil to be repaired comprises the following steps of: excavating and drying soil to be repaired; and grinding the soil to particles less than or equal to 2cm. The step of anaerobic repairing comprises the following steps of: closing an air compressor (4) of an anaerobic-aerobiotic biological sludge reactor, and sealing an aerating inlet (11-b); then filling nitrogen and adding sterile deoxidized water; after removing oxygen, adding water and soil particles to be repaired; and stirring uniformly, adding a nutritional liquid and a surfactant and inoculating anaerophyte for anaerobic repair. The step of aerobiotic repairing comprises the following steps of: opening the air compressor (4) and the aerating inlet (11-b) after anaerobic repairing; removing the water seal (14), wherein the concentration of dissolved oxygen is greater than or equal to 0.5mg / L, and adding humus for aerobiotic repairing.

Description

technical field [0001] The invention relates to a method for treating polluted soil, in particular to an anaerobic-aerobic restoration method for TNT polluted soil. Background technique [0002] Trinitrotoluene (C 6 h 2 CH 3 (NO 2 ) 3 ), referred to as TNT, has become the most widely used military high-performance explosive (high explosive) in history because of its good stability, relatively low melting point, good plasticity, relatively simple and economical synthesis process. TNT has been included in the list of priority pollutants by environmental protection agencies such as China and the United States because of its toxicity and three-way effects. Since TNT was invented in the late 19th century, the production of explosive munitions and the decommissioning of old munitions have been carried out on a large scale. By 1945, the TNT production capacity of each munitions production line in the United States was as high as 65 tons per day in the United States. Productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 谯华沈东升郝全龙周从直李恒张洪宇毛华军卢升史永刚肖晓熊开生
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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