Radionuclide Removal Hydrogel Composition and Stripping Method
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Solution Overview
Problem
Current methods for removing radionuclides from contaminated surfaces, such as those in nuclear power facilities and residential areas, face inefficiencies and generate significant secondary waste water, with existing technologies like high-pressure water and ion washing methods producing low removal efficiencies and generating large amounts of contaminated water, and using strippable coatings posing health risks and slow drying times.
Innovation Solution
A composition comprising a first polymer with a hydroxy group and a second polymer with a boronic acid group, which form a hydrogel upon cross-linking, allowing for effective adsorption and encapsulation of radionuclides, and can be easily peeled off and recycled without toxic additives, using a magnetic adsorbent for enhanced separation and recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If high pressure water is used to remove radionuclides, then the removal process is simple, but the removal efficiency is low (35-90%) and large amounts of contaminated water are generated
Solution Approach 1:
The invention uses a composite coating comprising a water-soluble polymer matrix combined with radionuclide-specific adsorbent particles (such as crown ethers for cesium, or phosphonic acid derivatives for strontium). This composite structure allows the coating to both adhere to surfaces and selectively bind radionuclides, achieving high removal efficiency while maintaining ease of application.
Solution Approach 2:
The coating acts as an intermediary substance that transfers radionuclides from the contaminated surface to a collectible form. The coating material mediates between the radionuclide-contaminated surface and the removal system, allowing efficient transfer and concentration of radionuclides into a manageable waste stream.
2Reliability
If ion washing methods using ammonium salts are used, then removal efficiency is improved, but large amounts of contaminated water are generated
Solution Approach 1:
The invention employs a thin-film coating that can be applied as a dry or semi-dry layer on contaminated surfaces. This film structure allows the coating to contact and bind radionuclides directly on the surface without requiring large volumes of liquid wash solutions, thereby reducing contaminated water generation while maintaining high removal efficiency.
Solution Approach 2:
The coating is designed as a single-use, disposable layer that is applied, allowed to bind radionuclides, and then easily removed as a complete unit. This disposable nature eliminates the need for repeated washing cycles and large volumes of water, as the entire coating with bound radionuclides can be collected and disposed of or treated as a concentrated waste stream.
3Reliability
If strippable coating agents such as DeconGel are used, then radionuclide removal efficiency is excellent (70-90%) and contaminated water is not generated, but toxic chelators and solvents are used and drying time is long (24 hours or more)
Solution Approach 1:
The invention modifies the chemical parameters of traditional strippable coatings by replacing toxic chelators with non-toxic, radionuclide-specific ligands (such as ion-exchange resins or selective chelating agents that are less toxic). The formulation is adjusted to use water-based or environmentally benign solvents, and the drying time is reduced by optimizing polymer composition and adding volatile components that evaporate quickly.
Solution Approach 2:
The invention extracts and removes the toxic components (harmful chelators and organic solvents) from the coating formulation while retaining the essential functionality of radionuclide binding and strippability. This is achieved by substituting toxic substances with safer alternatives that perform the same radionuclide-selective binding function without the associated health risks.
4Quantity of substance
If strippable coating agents are used, then contaminated water is not generated, but application is inconvenient requiring paint brush or trowel methods
Solution Approach 1:
The invention formulates the coating as a sprayable aerosol or mist that can be evenly distributed over contaminated surfaces using standard spray equipment. This pneumatic delivery method replaces the need for manual application with brushes or trowels, making the process faster and easier while still forming an effective coating that binds radionuclides and can be stripped without generating contaminated water.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves high radionuclide removal efficiency, reduces secondary waste water generation, and allows for easy recovery and recycling of the adsorbent, effectively addressing the challenges of existing methods by forming a hydrogel with excellent viscoelastic properties that can be easily detached and reused.
Implementation Method 1
a second polymer into which a boronic acid group is introduced as a functional group; and an adsorbent for removing the radionuclide, wherein the first polymer and the second polymer form a cross-linking bond with each other
Implementation Method 2
an adsorbent for removing the radionuclide
Data Source
AI summary
The present invention relates to a composition for removing a radionuclide, including: a first polymer including a hydroxy group; a second polymer into which a boronic acid group is introduced as a functional group; and an adsorbent for removing the radionuclide, and a method for removing a radionuclide using the same.