Ultrasonic Electro-Kinetic Destruction of Waterborne PFAS

Introducing the SDS-100 Hydrogen Fluoride Reactor with Calcium Hydroxide Clarification.

Piezo-electric transducers vibrate carbon electrodes at or near hydro acoustic cavitation amplitudes incident to waterborne PFAS particles in water. Fluorine-Carbon bonds are broken in PFAS generating Hydrogen Fluoride and Graphene Fluoride via electrolytic production of OHH Hydroxyls at the junction of the electrically charged vibrating carbon electrodes. In a following clarification stage, added Calcium Hydroxide neutralizes the Hydrogen Fluoride to make Calcium Fluoride and Calcium Carbonate by-products at ambient room temperature and pressure. The Graphene Fluoride is captured in a carbon foam filter egress.

Lab scale apparatus under development shown here will scrub PFAS and microbial pathogens out of domestic water supplies. The outgassed OHH surplus is directed to a PEM type Fuel Cell to generate electricity whereby the by-products are water and oxygen. The Fuel Cell technology produces electrical power for the reactor itself and for any external use. It only runs when water flows through the pipes via a control solenoid valve.

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Teflon is in contact with the vibrating graphite electrode as shown here. Fluorine is electro-exfoliated from the PFAS making Hydrogen Fluoride and Graphene Fluoride in addition to the OH+H hydroxyls from water electrolysis.

PTFE (Teflon) tape is the target source of PFAS which was rolled around the ground carbon electrode. 160 V at 64 kHz. of AC is applied between two carbon (graphite) electrodes. Observed outgassing at the ground electrode surface comprises OH hydroxyls, CO2, and Fluorine that is exfoliated (stripped) out of the Teflon tape at the junction of vibratory contact to the electrified cavitating carbon surface. The Fluorine immediately combines with a free hydrogen ion from the water electrolysis OH + H forming Hydrogen Fluoride then goes into solution to form Hydrofluoric acid in the water. Some also combines with the carbon from the electrode to form Graphene Fluoride nano-particle micro suspension.

A Municipal Scale system provides 1,000 GPH or more of PFAS free potable water suitable for and civil and military applications.

The HF-10 Hydrogen Fluoride sensor by Sensor Tec Amphenol is calibrated to 4 mV @ 1 ppm HF gas sensitivity.

Sample gas is periodically extracted at the water surface with a miniature air fan in a plenum housing where the sensor face is embedded and is exposed to the gas stream extracted from within the glass jar air space. The HF gas bubbles goes into solution very quickly and very little makes it to the water surface.

HF-10 Sensor Electronics

An initial high concentration of extracted HF gas decreases quickly as the air above the water surface is evacuated over time by the fan. Most of the gas goes into solution before it reaches the surface. The data points in the graph are 5 seconds apart.

This gas could not have been produced from any other source than from the yellow Teflon tape ( PFAS ) wrapped around the carbon electrode.

Clearly, the gas sample contains Hydrogen Fluoride indicating breakage of the fluorine / carbon bonds in the PFAS molecules.