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Open AccessEditor’s ChoiceArticle

Water Disinfection by Immobilized Photosensitizers

Department of Chemical Engineering, Biotechnology and Materials, Ariel University, Ariel 407000, Israel
Author to whom correspondence should be addressed.
Water 2019, 11(1), 26;
Received: 29 November 2018 / Revised: 16 December 2018 / Accepted: 21 December 2018 / Published: 24 December 2018
(This article belongs to the Special Issue Innovative Water Management and Reuse)
Fresh water shortage has become a global problem. A partial solution for this problem is the use of treated and disinfected wastewater for irrigation. However, most existing wastewater disinfection methods are based on the use of aggressive chemicals or power-consuming physical processes. Photodynamic eradication of waterborne bacteria by immobilized photosensitizers may be a good alternative to conventional methods. In the present work, the photosensitizers Rose Bengal sodium salt, Rose Bengal lactone, methylene blue, and hematoporphyrin were immobilized in polyethylene or polypropylene using a “green” method of co-extrusion, without addition of any chemicals, yielding polymeric strips and beads containing the photosensitizers. The antibacterial efficiency of these immobilized photosensitizers was tested against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli in batch and continuous regimes upon illumination with a white luminescent lamp. All examined photosensitizers demonstrated a good ability to decrease the bacterial concentration, up to their total eradication. Immobilized photosensitizers are proposed for batch or continuous disinfection of wastewater after secondary treatment. View Full-Text
Keywords: photosensitizers; PACT; Rose Bengal; methylene blue; hematoporphyrin; water disinfection photosensitizers; PACT; Rose Bengal; methylene blue; hematoporphyrin; water disinfection
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MDPI and ACS Style

Valkov, A.; Raik, K.A.; Mualem-Sinai, Y.; Nakonechny, F.; Nisnevitch, M. Water Disinfection by Immobilized Photosensitizers. Water 2019, 11, 26.

AMA Style

Valkov A, Raik KA, Mualem-Sinai Y, Nakonechny F, Nisnevitch M. Water Disinfection by Immobilized Photosensitizers. Water. 2019; 11(1):26.

Chicago/Turabian Style

Valkov, Anton; Raik, Kate A.; Mualem-Sinai, Yamit; Nakonechny, Faina; Nisnevitch, Marina. 2019. "Water Disinfection by Immobilized Photosensitizers" Water 11, no. 1: 26.

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