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Optimization of Mn removal from aqueous solutions through electrocoagulation.

Saeideh Omranpour Shahreza1, Nader Mokhtarian1, Sanaz Behnam1

  • 1Department of Chemical Engineering, Shahreza Branch, Islamic Azad University, Shahreza, Iran.

Environmental Technology
|August 21, 2018
PubMed
Summary

Electrocoagulation with aluminum electrodes effectively removes manganese (Mn) from water. Optimal conditions achieved 92% Mn removal, demonstrating a viable treatment method.

Keywords:
Electrocoagulationmanganese removaloptimizationresponse surface methodologywater treatment

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Area of Science:

  • Environmental Chemistry
  • Water Treatment Technologies

Background:

  • Manganese contamination in aqueous solutions poses environmental and health risks.
  • Conventional water treatment methods may struggle with efficient manganese removal.

Purpose of the Study:

  • To investigate the electrocoagulation process for manganese removal using aluminum electrodes.
  • To optimize operating parameters for maximum manganese removal efficiency.

Main Methods:

  • Electrocoagulation experiments were conducted using aluminum electrodes.
  • Response surface methodology with an orthogonal central composite design was employed to study variable effects.
  • Analysis of variance (ANOVA) was used to develop a predictive mathematical model.

Main Results:

  • Electrocoagulation demonstrated high efficiency in removing manganese from aqueous solutions.
  • An equilibrium state for manganese removal was reached within 195 minutes.
  • The developed mathematical model accurately described the experimental data with a high regression coefficient.
  • Pseudo-second-order kinetics and Langmuir isotherm models best described the removal process.

Conclusions:

  • Electrocoagulation using aluminum electrodes is an effective method for manganese removal.
  • Optimal operating conditions were identified as pH 9, 360 mg/L initial Mn concentration, 2 cm inter-electrode distance, and 10 V input voltage.
  • The study achieved a maximum manganese removal efficiency of 92%.