Electrochemically activated persulfate and peroxymonosulfate for furfural removal: optimization using Box-Behnken...

Area of Science:

• Environmental Chemistry
• Electrochemistry
• Water Treatment

Background:

• Furfural is a common pollutant in industrial wastewater.
• Effective removal methods are needed to mitigate environmental impact.
• Electrochemical activation of oxidants offers a promising treatment approach.

Purpose of the Study:

• To investigate furfural removal using electrochemically activated peroxydisulfate (E-PS) and peroxymonosulfate (E-PMS).
• To evaluate the influence of different anodes on oxidant activation.
• To determine optimal operating conditions for both E-PS and E-PMS processes.

Main Methods:

• Electrochemical oxidation experiments were conducted.
• Box-Behnken Design was employed for optimization.
• Anode materials were varied to assess their impact on activation efficiency.

Main Results:

• Optimal conditions for E-PS: 2.3 mM PS, 1.15 A current, pH 3.5, 118.3 min.
• Optimal conditions for E-PMS: 1.8 mM PMS, 1.05 A current, pH 3.3, 107.8 min.
• The E-PMS process demonstrated superior cost-effectiveness.

Conclusions:

• Both E-PS and E-PMS are effective for furfural removal.
• E-PMS presents a more economically viable option for furfural remediation.
• Electrochemical activation is a viable strategy for treating furfural-contaminated water.