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Urea peroxide and ferroporphyrin oxidation based soil remediation method

A technology of carbamide peroxide and soil remediation, applied in the restoration of polluted soil, etc., can solve problems such as the difficulty of lasting pollutant treatment effect, EDTA prone to self-degradation, high concentration unfavorable for storage and transportation, etc., to achieve a wide range of applications, The effect of fast degradation and saving operating costs

Inactive Publication Date: 2019-02-12
梁忠顺
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional Fenton reaction uses Fe2+ to catalyze the decomposition of H under acidic conditions 2 o 2 Hydroxyl radicals are generated to oxidize and degrade pollutants. In the repair process, a large amount of acid needs to be used, which has an acidifying effect on the soil; at the same time, a large amount of H needs to be added 2 o 2 , while H 2 o 2 High cost, high concentration is not conducive to storage and transportation
Although there are recent patents and literature reports on the Fenton-like reaction system composed of organic ligands such as ethylenediaminetetraacetic acid (EDTA), zero-valent iron, and air to generate H in situ 2 o 2 , Fenton reaction with the generated Fe2+ to degrade pollutants, but the EDTA used in this method is an organic ligand, which is prone to secondary pollution, and EDTA is also prone to self-degradation, and the pollutant treatment effect is difficult to last

Method used

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  • Urea peroxide and ferroporphyrin oxidation based soil remediation method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] After mixing carbamide peroxide and iron porphyrin evenly, add them to the contaminated soil, add 1 time water, and degrade at a stirring speed of 100r / min. After the degradation is completed, collect the mud and centrifuge the collected mud. Determine the content of organic pollutants in the soil and supernatant respectively to evaluate the remediation effect, otherwise continue to react until the concentration of organic pollutants drops to a satisfactory level.

[0024] Among them, the purity of carbamide peroxide is 95.0% and the moisture content is 4.0%; the ratio of carbamide peroxide, iron porphyrin, and contaminated soil, according to the weight ratio, is carbamide peroxide: porphyrin iron: contaminated soil=1:1:250.

Embodiment 2

[0026] After mixing the carbamide peroxide and porphyrin iron evenly, add them to the contaminated soil, add 1 time water, and degrade at a stirring speed of 200r / min. After the degradation is completed, collect the mud and centrifuge the collected mud. Measure the content of organic pollutants in the soil and supernatant respectively to evaluate the remediation effect, otherwise continue the reaction until the concentration of organic pollutants drops to a satisfactory level.

[0027] Among them, the purity of carbamide peroxide is 96.0%, and the moisture content is 3.0%; the ratio of carbamide peroxide, iron porphyrin, and contaminated soil, according to the weight ratio, is carbamide peroxide: porphyrin iron: contaminated soil=1:1:500.

Embodiment 3

[0029] After mixing the carbamide peroxide and porphyrin iron evenly, add them to the contaminated soil, add 1 time water, and degrade at a stirring speed of 150r / min. After the degradation, collect the mud and centrifuge the collected mud. Measure the content of organic pollutants in the soil and supernatant respectively to evaluate the remediation effect, otherwise continue the reaction until the concentration of organic pollutants drops to a satisfactory level.

[0030] Among them, the purity of carbamide peroxide is 97.0% and the water content is 2.0%; the ratio of carbamide peroxide, iron porphyrin, and contaminated soil, according to the weight ratio, is carbamide peroxide: porphyrin iron: contaminated soil = 1:1:300.

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Abstract

The invention discloses a urea peroxide and ferroporphyrin oxidation based soil remediation method. The method is characterized in that environmentally-friendly urea peroxide and ferroporphyrin oxidation is carried out to degrade organic pollutants, wherein urea peroxide is capable of decomposing and generating H2O2; H2O2 reacts with a free radical of ferroporphyrin; a plurality of active free radicals are generated, and the concentration is high; and the organic pollutants in the soil can be degraded. The remediation method is good in degrading effect, wide in applicable scope, and quick to remediate; in addition, the adopted device is simple; the cost is low; and the polluted soil can be effectively remediated.

Description

Technical field [0001] The invention relates to the field of prevention and treatment of refractory organic matter and soil remediation, in particular to a soil remediation method based on oxidation of carbamide peroxide and porphyrin iron. Background technique [0002] Soil is an important part of the ecological environment, one of the main resources that humans rely on for survival, and a repository of material biogeochemical cycles, and is highly sensitive to environmental changes. In recent years, the quality of soil environment has been deteriorating. The main reasons for its deterioration are: the increasing use of chemical fertilizers in agriculture; the widespread use of chemical pesticides; the discharge of industrial wastewater from farmland; the accidental discharge of toxic and harmful pollutants; and special solid waste. It is the leakage of toxic and hazardous substances caused by the landfill of toxic and hazardous solid wastes. Contaminated soil enters the human ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 梁忠顺
Owner 梁忠顺
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