Viral inactivation using microwave-enhanced membrane filtration.

Area of Science:

• Environmental Science
• Materials Science
• Chemical Engineering

Background:

• Pathogenic viruses in wastewater pose significant public health risks, causing waterborne diseases.
• Effective viral removal from water is crucial, especially highlighted by the COVID-19 pandemic.
• Current water treatment methods require enhancement for improved viral inactivation.

Purpose of the Study:

• To evaluate the efficacy of microwave-enabled catalysis integrated with membrane filtration for viral removal.
• To investigate the antiviral mechanisms, including local heating and radical formation, induced by microwave irradiation.
• To assess the performance of BiFeO3-coated PTFE membranes under microwave treatment.

Main Methods:

• A catalytic membrane filtration system incorporating microwave irradiation was developed.
• The model bacteriophage MS2 was used as a surrogate for pathogenic viruses.
• COMSOL simulations were employed to analyze microwave penetration and temperature distribution.

Main Results:

• A log removal of 2.6 for MS2 was achieved within 20 seconds using 125-W microwave irradiation.
• Microwave irradiation induced significant germicidal effects via local heating (up to 305°C) and radical formation.
• No significant viral inactivation was observed without microwave irradiation, highlighting its critical role.

Conclusions:

• Microwave-enabled catalytic membrane filtration offers a highly effective method for rapid viral inactivation in water.
• The study provides valuable insights into the mechanisms behind microwave-induced antiviral activity in catalytic systems.
• This technology holds promise for advancing water treatment strategies to combat waterborne viral pathogens.