Journal of Advanced Chemical Engineering

Indoor air disinfection in dynamic dark operating conditions

5^th International Conference on Advances in Chemical Engineering & Technology

October 04-05, 2018 | London, UK

Alienor Chauvin, Alexei Evstratov, Sandrine Bayle and Lionel Sabourin

IMT-Mines Ales, France

Scientific Tracks Abstracts: J Adv Chem Eng

Abstract:

It is already a well-known fact that on the average, employed men spend 90% of the day (21.7 h) indoors; as for married housewives, they spend 95% of the day (22.8 h) indoors. In this context, the indoor air conditioning (climatic, chemical, and antimicrobial) is currently one of the strategic priorities in the domain of collective hygiene and healthcare. Among modern technologies applied for the indoor air antimicrobial conditioning, the greatest attention is currently drawn to the photocatalytic air recycling procedures. However, all photocatalysts need to be activated by external energy inputs (energetically-dependent materials). For voluminous confined spaces, the energy costs of long-duration recycling photocatalytic processes become very important. The possibilities of application of non-photocatalytic dark-operating active materials for the environmental media germicidal conditioning were already discussed. These species occurring in the majority of cases, as metal or metal oxide-based nanomaterials (M/MO-NMs), including free nanoparticle (NPs), are declared to be energetically independent: no external excitation is needed for their functioning. The oxidative stress provided by reactive oxygen species (ROS) formed in contact of M/MO-NMs and NPs surfaces with humid media is the most widely probed contributory factor to the germicidal ability of the materials under consideration. The second mechanism which can cause important mechanical cellular damages is available for certain fibrous and tube-like shaped species. The darkoperating germicidal materials (DOGM) are applied predominantly in water medium and often in static conditions. The present contribution discusses the results of the implementation of two new DOGM types: a MnO₂-based interactive ROS generator and a ZnO-based blade-needle-shaped cellular destructor, for dynamic indoor air antimicrobial conditioning carried out in recycling operating mode (300 L pilot unit, airborne bacteria, real-time viable particle counter 9510-BD BioTrak, different circulation rates).

Recent Publications

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5. Miaskiewicz-Peska Ewa and Maria Lebkowska (2011) Effect of antimicrobial air filter treatment on bacterial survival. Fibres Text East Eur 19,1(84):73-77.

Biography :

Alienor Chauvin is a 2nd year PhD student skilled in Chemical Engineering and Applied Microbiology. Graduate chemist engineer (ENSIACET, France), Master degree in Process Engineering and Environment(ENSIACET, France), currently PhD student in Physico-Chemistry of Materials (IMT-Mines Alès, France) Currently, in the framework of the H2020 MSCA-RISE-2015 NANOGUARD2AR project, she is working on germicidal energetically independent dark-operating composite nanomaterials which present an alternative attractive way for the indoor air antimicrobial conditioning. Area of Interest is Interactions between materials and environment.

E-mail: alienor.chauvin@mines-ales.fr