Efficient Visible-Light Photocatalytic Bacterial Inactivation in Water Using Ruthenium Bipyridine Complexes-Doped Silica Gel
Nabil, E., Salah, D., ElBaghdady, K., Abdel-Samad, H., Abdel-Shafi, A. (2025). Efficient Visible-Light Photocatalytic Bacterial Inactivation in Water Using Ruthenium Bipyridine Complexes-Doped Silica Gel. EKB Journal Management System, (), -. doi: 10.21608/ejchem.2025.395150.11920
Eman Nabil; Dina Salah; Khaled Z. ElBaghdady; Hesham S. Abdel-Samad; Ayman A. Abdel-Shafi. "Efficient Visible-Light Photocatalytic Bacterial Inactivation in Water Using Ruthenium Bipyridine Complexes-Doped Silica Gel". EKB Journal Management System, , , 2025, -. doi: 10.21608/ejchem.2025.395150.11920
Nabil, E., Salah, D., ElBaghdady, K., Abdel-Samad, H., Abdel-Shafi, A. (2025). 'Efficient Visible-Light Photocatalytic Bacterial Inactivation in Water Using Ruthenium Bipyridine Complexes-Doped Silica Gel', EKB Journal Management System, (), pp. -. doi: 10.21608/ejchem.2025.395150.11920
Nabil, E., Salah, D., ElBaghdady, K., Abdel-Samad, H., Abdel-Shafi, A. Efficient Visible-Light Photocatalytic Bacterial Inactivation in Water Using Ruthenium Bipyridine Complexes-Doped Silica Gel. EKB Journal Management System, 2025; (): -. doi: 10.21608/ejchem.2025.395150.11920

Efficient Visible-Light Photocatalytic Bacterial Inactivation in Water Using Ruthenium Bipyridine Complexes-Doped Silica Gel

Egyptian Journal of Chemistry
Articles in Press, Accepted Manuscript, Available Online from 05 August 2025  XML
Document Type: Original Article
DOI: 10.21608/ejchem.2025.395150.11920
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Authors
Eman Nabil1; Dina Salah2; Khaled Z. ElBaghdady3; Hesham S. Abdel-Samadorcid 1; Ayman A. Abdel-Shafi email orcid 1
1Department of Chemistry, Faculty of Science, Ain Shams University, 11566 Abbassia, Cairo, Egypt.
2Department of Physics, Faculty of Science, Ain Shams University, 11566 Abbassia, Cairo, Egypt.
3Department of Microbiology, Faculty of Science, Ain Shams University, 11566 Abbassia, Cairo, Egypt.
Abstract
This study explores the potential of singlet oxygen (¹O₂) generated from ruthenium bipyridine complexes as a novel disinfection method against waterborne bacterial pathogens, specifically Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). Light activation of the ruthenium complex effectively produces ¹O₂, a potent oxidant that damages bacterial cell membranes and disrupts cellular functions. Ruthenium complexes were immobilized onto silica gel to avoid their leaching to water. Disinfection efficacy was assessed by comparing viable cell counts before and after photosensitizer exposure to light. The results demonstrated a significant reduction in bacterial viability, with S. aureus exhibiting greater susceptibility to the treatment than E. coli. These findings suggested that singlet oxygen generated from ruthenium bipyridine complexes offers a promising alternative for waterborne pathogen disinfection, representing an innovative approach with the potential to enhance current water treatment protocols. The potential of advanced oxidation processes to enhance public health outcomes is demonstrated by this study.
Keywords
wastewater treatment; singlet oxygen; bacteria; ruthenium complexes; purification
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