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Peroxide activator and process for purifying soil and/or ground water

A peroxide and activator technology, applied in chemical instruments and methods, oxidized water/sewage treatment, special compound water treatment, etc., can solve problems such as oil pollution reprocessing, and achieve the effect of saving the time for preparing pharmaceuticals

Active Publication Date: 2013-01-09
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires the pH of the reaction field to be 5 or less, and there is a possibility that the elution and diffusion of heavy metals may occur
[0006] As an in-situ purification technology for petroleum hydrocarbons in the neutral region, washing methods using surfactants have been tried (Non-Patent Documents 1~3), but these methods are all washing, and there is a need to reprocess the recovered oil pollution Shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0054] (1) Use a 100mL pressure-resistant screw bottle as the reaction vessel.

[0055] (2) Use 2.7% by weight of diatomaceous earth (diatomaceous earth reagent Lot.G 1D3004 manufactured by Komune Scientific Pharmaceutical Co., Ltd.) as an organic matter adsorption material, and use a solution containing an iron complex as a peroxide activation agent. The BET specific surface area of ​​the diatomaceous earth manufactured by Komune Scientific Pharmaceutical Co., Ltd. is 38.1m 2 / g. In addition, as the iron complex, ethylene glycol ether diamine tetraacetic acid (GEDTA, "Chelest GEA" manufactured by Chelest Corporation) was used as a chelating agent, FeSO 4 ·7H 2 O (a special grade reagent manufactured by Wako Pure Chemical Industries, Ltd.) was used as an iron salt, and the molar ratio of the chelating agent / iron ion was adjusted to 1, and the iron ion concentration was 1500 mg / L.

[0056] (3) 440 mM sodium bicarbonate / 0.875 mM sodium carbonate aqueous solution was used as ...

Embodiment 2）

[0070] Nitrilotris(methylenephosphonic acid) (NTMP, "Chelest PH-320" manufactured by Chelest Corporation) was used as a chelating agent. As a result of the test performed in the same manner as in Example 1, the degradation rate of kerosene was 71.9%.

Embodiment 3）

[0072] As a result of testing in the same manner as in Example 1 except that L-aspartic acid diacetic acid (manufactured by ASDA, Mitsubishi Rayon Co., Ltd.) was used as a chelating agent, the kerosene degradation rate was 71.0%.

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Abstract

Provided is a process by which soil and / or ground water polluted with lowly water-soluble organochemicals can be easily and efficiently purified at a low cost. A peroxide activator for use in activating peroxides used in the purification of soil and / or ground water polluted with lowly water-soluble organochemicals, characterized by comprising both an iron complex and a diatomite-containing adsorbent material that can adsorb organochemicals; and a purifying process using the same.

Description

technical field [0001] The present invention relates to an activator for peroxides used in combination with peroxides used for purifying soil and / or groundwater polluted by organic compounds, containing an organic substance adsorbing material and an iron complex, and purification using the same method. Background technique [0002] It has been clarified that the pollution of soil and / or groundwater will have a significant impact on the living environment, and the Japanese Water Pollution Control Law and the Japanese Soil Pollution Control Law have been enacted, and the organic compound pollution accumulated and shelved until now is being purified. In addition, the organic compounds mentioned here mainly include petroleum hydrocarbons such as TPH (Total Petroleum Hydrocarbon), refractory substances that are difficult to be biodegraded, pesticides, preservatives, cyanide, and the like. [0003] For these organic compounds, various purification methods including physical, chem...

Claims

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Application Information

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IPC IPC(8): C09K3/00B09C1/02B09C1/08C02F1/28C02F1/72C09K17/02C09K17/14C09K17/40
CPCC02F1/722C02F2103/06C02F2101/30C02F2305/026C02F1/683C02F1/281C02F1/725C09K17/40
Inventor 君塚健一新开洋介吉田净吉冈成康海老原孝
Owner MITSUBISHI GAS CHEM CO INC
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