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Related Concept Videos

Electrolysis03:00

Electrolysis

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In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

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Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
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Voltaic/Galvanic Cells02:47

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Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
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Controlled-Current Coulometry: Overview01:27

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Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...
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Voltammetry: Overview01:20

Voltammetry: Overview

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Voltammetry is an electroanalytical technique in which the current flowing through an electrochemical cell is measured as a function of applied potential, typically under conditions of concentration polarization. The technique provides valuable information about redox-active species, and the current response is plotted as a voltammogram.
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Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

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Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
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Updated: Jun 23, 2025

Electrochemically and Bioelectrochemically Induced Ammonium Recovery
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Model-based development of cell voltage control system for modified bio-electro-Fenton process.

Minkyung Kim1, Moonil Kim1, Fenghao Cui2

  • 1Department of Civil and Environmental System Engineering, Hanyang University ERICA, 55 Hanyangdaehak-ro, Ansan, Kyeonggido 426-791, Republic of Korea.

Bioresource Technology
|June 17, 2024
PubMed
Summary

A modified bio-electro-Fenton process with automatic cell voltage control significantly enhances organic removal efficiency and saves 90% energy. This advanced wastewater treatment method integrates bioelectricity generation and chemical oxidation for improved performance.

Keywords:
Advanced oxidation processBioelectrochemistryModel-based designSimulationWastewater treatment

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Area of Science:

  • Environmental Engineering
  • Electrochemistry
  • Biotechnology

Background:

  • Wastewater treatment faces challenges with biodegradable and recalcitrant organic pollutants.
  • Conventional methods often lack efficiency and energy optimization.
  • Bio-electro-Fenton (BEF) processes offer potential for combined biological and electrochemical treatment.

Purpose of the Study:

  • To demonstrate a modified bio-electro-Fenton (M-BEF) process with enhanced organic removal and energy savings.
  • To investigate the impact of operating schemes on energy consumption using model-based design.
  • To develop an automatic cell voltage control system for optimized wastewater treatment.

Main Methods:

  • Implementation of a modified bio-electro-Fenton (M-BEF) process in a continuous-flow reactor.
  • Integration of an automatic cell voltage control system.
  • Utilizing model-based design (MBD) for simulations and analysis of energy usage.
  • Treatment of synthetic wastewater containing glucose and biphenyl.

Main Results:

  • The M-BEF process achieved stable effluent chemical oxygen demand (COD) concentrations between 2-6 mg L⁻¹.
  • COD removal efficiency was unstable (<70%) without an external voltage supply.
  • The automatic cell voltage control system resulted in a 90% power saving compared to continuous supply.
  • The M-BEF process successfully integrated bioelectricity generation, H₂O₂ production, and Fenton reaction.

Conclusions:

  • The M-BEF process with cell voltage control is highly effective for organic pollutant removal and energy saving.
  • Automatic cell voltage control is crucial for stable and efficient wastewater treatment.
  • Further research on diverse environmental samples can optimize real-time power management and treatment efficacy.