Portable point-of-use photoelectrocatalytic device provides rapid water disinfection

Renato Montenegro-Ayo, Ana C. Barrios, Indrayudh Mondal, Kartik Bhagat, Juan Carlos Morales-Gomero, Morteza Abbaszadegan, Paul Westerhoff, François Perreault, Sergi Garcia-Segura

Research output: Contribution to journalArticle (Contribution to Journal)

Abstract

Portable water purification devices are needed to provide safe drinking water in rural communities, developing communities with low quality centralized water distribution, and military or recreational applications. Filtration, ultraviolet light, or chemical additives provide a spectrum of alternatives to remove pathogens from water. For the first time, we design, fabricate and demonstrate the performance of a small portable photoelectric point-of-use device, and document its performance on pathogen inactivation. The device utilizes a commercial teacup from which TiO2 nanotube photoanodes were produced in-situ and, with a small rechargeable battery powered 365 nm light emitting diode, was able to achieve 5-log inactivation of Escherichia coli in 10 s and 2.6-log of Legionella in 60 s of treatment in model water samples. Treatment of natural water achieved a 1-log bacteria inactivation after 30 s due to matrix effects. The electro-photocatalytic disinfection reactor in a kup (e-DRINK) can provide a feasible and affordable solution to ensure access to clean water. More broadly, this work demonstrates the potential for illumination to improve the efficiency of electrocatalytic surfaces.

Original languageEnglish
Article number140044
JournalScience of the Total Environment
Volume737
DOIs
StatePublished - 1 Oct 2020

Keywords

  • Electrochemical advanced oxidation processes
  • Escherichia coli
  • Legionella
  • TiO nanotubes photo-anodes
  • Translational technology
  • Water treatment

Fingerprint Dive into the research topics of 'Portable point-of-use photoelectrocatalytic device provides rapid water disinfection'. Together they form a unique fingerprint.

  • Cite this

    Montenegro-Ayo, R., Barrios, A. C., Mondal, I., Bhagat, K., Morales-Gomero, J. C., Abbaszadegan, M., Westerhoff, P., Perreault, F., & Garcia-Segura, S. (2020). Portable point-of-use photoelectrocatalytic device provides rapid water disinfection. Science of the Total Environment, 737, [140044]. https://doi.org/10.1016/j.scitotenv.2020.140044