Acidic Foam Decontamination Composition for Hazardous Surface Cleaning
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Solution Overview
Problem
Current methods for decontaminating surfaces contaminated with nuclear, biological, or chemical agents are inadequate for quickly and effectively removing hazardous materials, particularly from radiological devices, biological agents, and chemical warfare agents, which pose ongoing health and safety risks due to their persistence on surfaces.
Innovation Solution
A composition comprising water, at least one acid, a surfactant, a fluoride salt, and ammonium nitrate, which can form a foam to reduce the mass required for treatment, is applied to surfaces to remove contaminants, with optional ingredients like gelatin or starch to enhance decontamination, and can be used in ultrasonic baths or sprayed onto surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional decontamination methods are used, then contaminants can be removed from surfaces, but the process requires large amounts of material and time, reducing productivity
Solution Approach 1:
The patent changes the chemical parameters of the decontamination composition by incorporating specific acids (hydrochloric acid, nitric acid, or sulfuric acid) in controlled concentrations (0.1-10%), combined with surfactants and fluoride salts. This parameter optimization enables faster contaminant removal with reduced material quantities compared to conventional methods.
Solution Approach 2:
The invention uses a composite decontamination composition containing multiple active ingredients working synergistically: acids for chemical dissolution, surfactants for surface activation and emulsification, fluoride salts for enhanced contaminant removal, and optional gelatin or starch for foam stabilization. This composite approach improves decontamination efficiency and speed while reducing the total amount of material needed.
2Reliability
If strong chemicals are used to remove contaminants, then decontamination effectiveness increases, but environmental impact and toxicity increase
Solution Approach 1:
The patent optimizes the concentration parameters of acidic components to 0.1-10%, which provides effective decontamination while minimizing environmental harm. This controlled parameter range balances contaminant removal capability with reduced toxicity and environmental impact compared to conventional strong chemical treatments.
Solution Approach 2:
The invention introduces surfactants as intermediary substances that facilitate the interaction between the acidic decontamination composition and contaminants. The surfactants (0.1-10%) act as mediators that enhance contaminant removal through surface activation and emulsification, allowing for milder acid concentrations that are less harmful to the environment while maintaining decontamination effectiveness.
3Reliability
If large amounts of decontamination material are applied to surfaces, then contaminant removal improves, but the mass and complexity of the treatment system increases
Solution Approach 1:
The patent employs a multi-component composite composition where each ingredient serves a specific function: acids for chemical dissolution, surfactants for surface activation, fluoride salts for contaminant complexation, and foam stabilizers for controlled application. This functional specialization allows effective decontamination with reduced overall material quantities and simplified application systems.
Solution Approach 2:
The invention utilizes phase transition by forming a foam structure from the liquid decontamination composition. The foam (when gelatin or starch is included at 0.1-5%) provides extended contact time with contaminants through its bubble structure, improving removal efficiency without requiring larger amounts of material or more complex application equipment.
4Reliability
If conventional foam compositions with surfactant and gelatin are used, then decontamination can be achieved, but the pH restriction limits effectiveness against certain contaminants
Solution Approach 1:
The patent changes the pH parameter by incorporating acids (hydrochloric acid, nitric acid, or sulfuric acid) at concentrations of 0.1-10%, creating an acidic environment (pH < 7) that enhances effectiveness against radiological, biological, and chemical contaminants. This parameter modification expands adaptability to various contaminant types while maintaining foam structure through surfactant and optional gelatin/starch components.
Solution Approach 2:
The invention creates a universal decontamination composition that can handle multiple contaminant types (radiological, biological, chemical) through its multi-functional ingredient system. The acids provide broad-spectrum contaminant dissolution, surfactants ensure surface activation for diverse substrates, and fluoride salts offer additional contaminant complexation capabilities, making the composition adaptable to various contamination scenarios.
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 composition effectively reduces contaminants by up to 99% on surfaces, including radioactive and chemical materials, while minimizing environmental impact and avoiding toxic ingredients, and can be used on various surfaces without significant degradation of materials.
Implementation Method 1
at least one acid
Implementation Method 2
at least one surfactant
Implementation Method 3
at least one fluoride salt
Implementation Method 4
ammonium nitrate
Implementation Method 5
which can form a foam to reduce the mass required for treatment
Implementation Method 6
can be used in ultrasonic baths
Data Source
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Figure 2
AI summary
A composition of matter includes water, at least one acid, at least one surfactant, at least one fluoride salt, and ammonium nitrate. A method of decontaminating a surface includes exposing a surface to such a composition and removing the composition from the surface. Other compositions of matter include water, a fatty alcohol ether sulfate, nitrilotriacetic acid, at least one of hydrochloric acid and nitric acid, sodium fluoride, potassium fluoride, ammonium nitrate, and gelatin.