Sintered Wave Polarity Conversion for Non-Destructive PFAS Removal
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Solution Overview
Problem
Current methods for removing Per- and Polyfluoroalkyl Substances (PFAS) from various media, including soil, sludge, and air, are inefficient and often result in the formation of hazardous by-products like hydrofluoric acid, due to the use of thermal technologies that create steep thermal gradients and pyroelectric currents, which redistribute PFAS rather than remove them effectively.
Innovation Solution
A multimedia polarity conversion technology that uses a combination of a polarity conversion unit, vapor emissions treatment system, and amphiphilic decontamination wand to safely remove PFAS by altering Gibbs free surface energy and Coulomb's interactions through static geometry, high surface area, and controlled temperature and velocity modulation, preventing the destruction of PFAS molecules and avoiding the formation of harmful by-products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If thermal technologies are used to remove PFAS from soil and media, then PFAS removal is achieved, but hazardous by-products like hydrofluoric acid are formed and PFAS is redistributed rather than effectively removed
Solution Approach 1:
The patent changes the fundamental parameter from thermal energy to electrical energy (electrostatic fields). Instead of using heat to remove PFAS, the invention uses electrostatic attraction fields generated by charged sintered wave media to attract and capture PFAS molecules, completely avoiding the temperature-related harmful effects that produce hydrofluoric acid
Solution Approach 2:
The patent replaces the thermal/mechanical heating system with an electrostatic field system. The sintered wave media generates electrostatic attraction that directly captures PFAS molecules through charge interaction, substituting the thermal mechanism that caused harmful by-product formation
2Temperature
If steep thermal gradients are applied to heat soil for PFAS removal, then heating efficiency is improved, but pyroelectric currents are generated that redistribute PFAS
Solution Approach 1:
The patent replaces the thermal gradient system with an electrostatic field system. Instead of using temperature differences to drive PFAS movement, the invention uses electrostatic attraction fields from charged sintered wave media to directly capture and hold PFAS in place, eliminating pyroelectric current generation
Solution Approach 2:
The patent fundamentally changes the energy parameter from thermal to electrical. The sintered wave media operates at electrical potentials that create stable electrostatic attraction zones, replacing the unstable thermal gradient mechanism that caused PFAS redistribution through pyroelectric effects
3Quantity of substance
If high temperatures are used to incinerate PFAS, then complete destruction of PFAS is achieved, but equipment damage and safety hazards increase
Solution Approach 1:
The patent converts the harmful thermal energy that causes equipment damage into a beneficial electrostatic field. The sintered wave media uses electrical charging to create attraction fields that capture PFAS without the destructive effects of high temperature, turning the problem of thermal damage into a solution using electrical energy
Solution Approach 2:
The patent changes the energy parameter from thermal to electrical. Instead of using high-temperature incineration that damages equipment, the invention uses electrostatic attraction from charged sintered wave media to capture and concentrate PFAS for safe removal, completely avoiding thermal equipment damage
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
This approach allows for non-destructive removal of PFAS from diverse media, maintaining molecular integrity and preventing the generation of hazardous by-products, thereby effectively addressing the inefficiencies and safety concerns of existing thermal technologies.
Implementation Method 1
a sintered wave multimedia comprising a plurality of charged sintered elements arranged in a sintered element array configuration
Implementation Method 2
a cooling fluid line that injects droplets of cooling fluid into the cooling chase and the misting chamber to cool the PFAS-containing vapor
Implementation Method 3
heated treatment air delivered by the plurality of air injection heads is drawn by the vapor extraction lines through the shaping screen assembly within the media
Data Source
AI summary
Apparatus and methods for a non-destructive recovery of PFAS contaminants from a variety of media, the apparatus including 1) a polarity conversion unit for non-destructive PFAS removal from soil, sludges, filter media, and objects; 2) a brine pot evaporator for recovering PFAS from foams and fluids; 3) a fluids treatment system for PFAS removal from treated fluids; and 4) an amphiphilic decontamination wand for PFAS removal from hard surfaces.