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Decontamination paste and method for decontaminating a substrate made of a solid material using said paste

A paste and substrate technology, applied in chemical instruments and methods, detergent compounding agents, detergent compositions, etc., can solve the problems of unstable solid materials, no decontamination composition, etc., and achieve the effect of high decontamination efficiency

Pending Publication Date: 2021-07-23
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0050] In conclusion, there is currently no decontamination composition or method capable of simultaneously satisfactorily destabilizing, surface, subsurface and deep, deep decontamination of solid materials

Method used

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  • Decontamination paste and method for decontaminating a substrate made of a solid material using said paste
  • Decontamination paste and method for decontaminating a substrate made of a solid material using said paste
  • Decontamination paste and method for decontaminating a substrate made of a solid material using said paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0279] In this example, the preparation of two surface, subsurface and deep, deep stain removal pastes referred to as "Paste-1" and "Paste-2" according to the present invention is described.

[0280] Paste-1 is a paste with the following composition:

[0281] -0.8% by weight (based on the total weight of the paste) of Selling Cellulose BC 1000 (fiber size about 700μm);

[0282] -49.6% by weight (based on the total weight of the paste) of sales of kaolinite; and

[0283] - 49.6% by weight (based on the total weight of the paste) of deionized water.

[0284] Paste-2 is a paste with the following composition:

[0285] -8% by weight (based on the total weight of the paste) of Selling Cellulose BC 1000 (fiber size about 700μm);

[0286] -20% by weight (based on the total weight of the paste) of sales of kaolinite; and

[0287] - 72% by weight (based on the total weight of the paste) of deionized water.

[0288] The synthetic schemes for the two pastes are similar:

[...

Embodiment 2

[0296] In this example, the efficiency of the paste according to the invention, namely Paste-1 prepared in Example 1, for surface, subsurface and deep, deep decontamination of porous materials is demonstrated.

[0297] More precisely, in this example, the decontamination of a porous material consisting of a stack of glass beads coated with 133 Cs deep pollution.

[0298] The soil release paste according to the invention used in this example was Paste-1 prepared in Example 1.

[0299]The porous material used was a stack of glass beads with a size between 45 μm and 90 μm prepared in a circular crystallization dish with a diameter of 9.1 cm.

[0300] The 2 cm high glass beads thus prepared were heaped with 43.42 mL of CsNO 3 CsNO at a concentration of 0.016M 3 Soak and saturate with aqueous solution. In the glass bead heap there is 93mg of 133 Cs.

[0301] A 2 cm paste-1 layer was then placed on top of the heap of glass beads saturated with solution. The whole is then allo...

Embodiment 3

[0305] In this example, the immobilization of pollutants in final solid waste obtained after decontamination with the paste according to the invention is investigated. Here it is demonstrated that the clay is essential to act both as a tackifier and as a stain fixative.

[0306] More precisely, in this example it is demonstrated the ability of the paste according to the invention to fix pollutants in the dry paste obtained after the decontamination operation.

[0307] For this, soak 1 g of Kaolinite for sale. Prepare samples with different Cs concentrations, namely: 10 -1 M, 10 -2 M, 10 -3 M and 10 -5 M. The sample was dried until evaporated, then suspended in 100 mL with stirring for 24 h. After 24 h, the solution was filtered and the Cs content was analyzed by atomic absorption spectroscopy, which was then compared with the amount of Cs introduced into each gram of kaolinite. Finally, the Cs content retained by the clay was calculated and expressed in %. The result...

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Abstract

The invention relates to a decontamination paste comprising at least one inorganic viscosifier selected from clays, at least one compound in the form of fibers and optionally further one or more optional components, the remainder being of solvent. The invention also relates to a method for decontaminating a substrate made of a solid material using said paste, said substrate being contaminated by at least one contaminant species referred to as the labile contaminant species and / or by at least one contaminant species referred to as the surface contaminant species located on one of the surfaces thereof, and / or by at least one contaminant species referred to as the subsurface contaminating species located just below said surface, and / or by at least one contaminant species located under said surface in the depth of the substrate.

Description

technical field [0001] An object of the present invention is a decontamination paste for decontamination of substrates made of soiled solid materials. [0002] The present invention further relates to methods of removing stains using such stain release pastes. [0003] Decontamination or depollution of a substrate refers to the removal of pollutants, contaminants, from the substrate. [0004] Contaminants or polluting substances generally refer to substances, compounds which are not normally part of the substrate material and whose presence is undesirable. [0005] These contaminants can be located on the surface of the substrate, directly below the surface of the substrate (under the surface), or deep within the substrate. [0006] The method and the paste according to the invention allow the decontamination of all kinds of materials, such as metals, plastics, mineral materials such as glass materials. [0007] The method and the paste according to the invention are equall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D3/12C11D7/14A62D3/33G21F9/30
CPCC11D3/1253C11D7/14G21F9/30A62D3/33A62D2101/02G21F9/12G21F9/302
Inventor 奥尔本·歌萨德默罕默德·尼达尔·本·阿卜杜勒瓦哈卜菲利普·库索
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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