Digital health and medical technologies

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Published February 6, 2026 | Version v1
Working paper Open

Theoretical Framework for Sensorless pH Monitoring in Hydrometallurgical Systems: A Voltammetric Overpotential Approach for Edge Computing

Description

This working paper introduces the "Hydro-Logics" protocol, a pioneering theoretical framework for indirect pH estimation and virtual sensing in complex electrochemical environments. Traditional physical sensors, such as glass-bulb electrodes, suffer from rapid degradation due to chemical poisoning and biofouling in industrial and clinical settings.

The "Hydro-Logics" protocol represents a paradigm shift in system control by transforming standard power electrodes into high-precision diagnostic tools. Utilizing an ESP32-S3 architecture for Edge Computing, the model analyzes the Hydrogen Evolution Reaction (HER) through linear sweep voltammetry. By identifying the onset potential (Vonset) and applying a Nernstian model corrected for cathodic overpotential (η), the system achieves real-time monitoring without physical pH sensors.

Key Innovations:

    Virtual Sensing for Harsh Environments: Enables resilient monitoring in dense mineral slurries (Rare Earth Elements) and biological fluids where traditional sensors fail.

    Edge Intelligence: Implementation of the HydroLogics_V1 algorithm for real-time derivative analysis (dI/dV) at the hardware level.

    Cross-Disciplinary Application: Validated frameworks for both Advanced Metallurgy (Hydrometallurgy Mode) and Clinical Diagnostics (gastric acidity and sweat electrolyte screening).

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Theoretical Framework for Sensorless pH Monitoring in Hydrometallurgical Systems A Voltammetric Overpotential Approach for Edge Computing.pdf

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Additional details

References

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