Zinc Oxide in Photocatalytic Removal of Staphylococcus aureus and Klebsiella pneumoniae from Water with Ultraviolet and Visible Solar Radiations

Ahed H. Zyoud, Majdi Dwikat, Sawsan Anabtawi, Raed Alkowni, Naser Qamhieh, Abdulrazack Hajamohideen, Shaher H. Zyoud, Muath H.S. Helal, Samer H. Zyoud, Heba Nassar, Hikmat S. Hilal

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Bacterial deactivation by cell-wall rupturing is widely described. Complete mineralization of both aqueous gram-positive Staphylococcus aureus and gram-negative Klebsiella pneumoniae, leaving no organic species, is described here for the first time. Solar-simulated radiation (with ~ 5% UV), with ZnO nanoparticle photocatalyst, is used. In addition to complete bacterial deactivation (~ 100%), their mineralization is achievable with time. Both bacteria, with thick and thin peptidoglycan layers, are mineralized. In thicker walled S. aureus, ~ 72% mineralization is achievable, while in thinner walled K. pneumoniae, mineralization is ~ 85%. Anthocyanin-sensitized ZnO shows higher catalytic efficiency under purely visible light, while pristine ZnO particles are more effective under simulated solar radiation. The results show the feasibility of using direct solar radiation in photocatalytic water disinfection without the need to use other more costly and hazardous methods. The study is especially useful to many societies having limited access to safe drinking water.

Original languageEnglish
Pages (from-to)420-431
Number of pages12
JournalJOM
Volume73
Issue number1
DOIs
Publication statusPublished - Jan 2021

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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