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564 results about "Disodium EDTA" patented technology

About DISODIUM EDTA: EDTA (ethylenediaminetetraacetic acid) is a chelating agent, used to sequester and decrease the reactivity of metal ions that may be present in a product.

Method for repairing organic polluted soil by intensifying Fenton oxidation

ActiveCN104399742AImprove adsorption capacityMaintain a valid formContaminated soil reclamationEthylene diamineNational Ambient Air Quality Standards
The invention relates to the field of polluted soil repair, particularly to a method for repairing organic polluted soil by intensifying Fenton oxidation. The method comprises the following steps: (1) selecting organic pollution soil to be repaired, grinding and crushing, and screening by using a 10-mesh steel screen; (2) adding an enhancer powdery active carbon, sodium oxalate and disodium EDTA (ethylene diamine tetraacetic acid), uniformly mixing and maintaining soil; (3) adding a catalyst ferrous sulfate, uniformly mixing and maintaining soil; (4) adding diluted industrial hydrogen peroxide, uniformly mixing, and maintaining soil. The method provided by the invention has the benefits that the active carbon powder is added to absorb organic matters so as to enhance the reaction probability of the organic matters and hydrogen peroxide; sodium oxalate is added to provide a continuous hydrogen peroxide source; ferrous sulfate is added to catalyze and enhance the oxidizing ability of hydrogen peroxide, so that the Fenton repair effect is improved; disodium EDTA is added and Fe<2+> form is controlled and maintained by virtue of a chelating effect. By virtue of the above intensifying measures, the polluted soil can be quickly and effectively repaired, so that the content of the organic matters in soil reaches national ambient air quality standard.
Owner:JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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