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Method for oxidising organic compounds

A technology of organic compounds and oxidants, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve problems such as non-biodegradable and difficult biodegradable, and achieve the effect of increasing efficiency

Inactive Publication Date: 2012-12-19
TOTAL PUTEAUX FR +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, the chelating agent EDTA used in the practice of the prior art is considered not to be biodegradable, although it can sometimes be biodegraded with great difficulty under very specific conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Example 1 - Laboratory Tests

[0101] Sampling sediments from sites contaminated with organic compounds. The sediment was sieved at 9mm and the fraction that passed through was retained. The sediment was mixed and homogenized.

[0102] In the following, the measurement of the total hydrocarbon content was carried out by gas chromatography with flame ionization detector (GC / FID) after filtration on a 0.2-0.8 μm filter.

[0103] The initial total hydrocarbon content was 29.5 mg / l.

[0104] A 250 g portion of the sediment was mixed with 500 mL of a 100 g / L aqueous sodium percarbonate solution. The mixture was placed on a shaking table for 3 hours after which time 450 mL of leachate was collected.

[0105] Sample A (according to the prior art) was obtained by sampling 200 mL of leachate, mixing it with 0.46 g of ferric sulfate heptahydrate, 0.48 g of EDTA and 8.4 mL of 30% aqueous hydrogen peroxide, and shaking it on a shaking table for 48 hours. Measurements of the ...

Embodiment 2

[0107] Example 2 - Testing at Pilot Test Site

[0108] In places where groundwater is polluted by hydrocarbons, especially benzene (average content 10mg / L).

[0109] Each pilot test has two injection wells.

[0110] Tested under two different conditions:

[0111] - In the first pilot test, inject 1000L of 50% aqueous hydrogen peroxide diluted in about 9000L of water, then inject 200L of hydrogen peroxide diluted in about 1000L Solv-X and 16kg ferric sulfate heptahydrate.

[0112] - In the second pilot test, inject 1500kg of sodium percarbonate mixed in about 9000L of aqueous solution, then inject 140L diluted in about 1000L of water S0lv-X and 14kg ferric sulfate heptahydrate.

[0113] In each case, the hydrocarbon content present in the groundwater was measured in 5 measurement wells located downstream of the respective injection point (according to the flow direction of the groundwater).

[0114] In the first pilot test, downstream of the injection point, an average...

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PUM

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Abstract

The invention relates to a method for oxidising one or more organic compounds, including placing the organic compounds in contact with at least one oxidising agent as well as with a catalyst agent including at least one source of divalent or trivalent transition metal ions and at least one poly-alpha-hydroxyacrylic acid and / or a poly-alpha-hydroxyacrylate. The invention can be used for removing pollutants from soils.

Description

technical field [0001] The present invention relates to methods for the oxidation of organic compounds, in particular organic compounds present in the environment, for example in soil or in aquifers, and to methods for in situ decontamination of soils containing organic compounds. Background technique [0002] The treatment of soil and groundwater contaminated with pollutants, especially organic pollutants, is a growing challenge due to the difficulty of its implementation and the costs involved. [0003] Soil excavation is a conceivable technique, but very expensive and sometimes impossible to implement. To this end, ongoing research has mainly focused on the in-situ treatment of pollutants. [0004] Incineration of contaminated soil is the first possible in situ method, but has the potential to produce harmful by-products such as PCDDs Disadvantages of English (PCDD) and polychlorinated dibenzofurans (PCDF). The second method is in situ biotreatment or bioremediation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08C02F1/72
CPCB09C1/08C02F2101/30C02F1/725
Inventor 让-克洛德·斯捷让-路易斯·波尔南让-塞巴斯蒂安·德埃弗雷德里克·佩里耶让-玛丽·布朗德尔罗格·雅凯让-克里斯托弗·勒纳洛朗·克莱门泰勒维姆·普莱西耶
Owner TOTAL PUTEAUX FR
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