Efficacy of Inactivation of Human Enteroviruses by Dual-wavelength Germicidal Ultraviolet (UV-C) Light Emitting Diodes (LEDs)

Overview

Journal Water (Basel)

Date 2019 Jul 6

PMID 31275622

Citations 12

Authors

Hyoungmin Woo

Sara E Beck

Laura A Boczek

Kelsie Carlson

Nichole E Brinkman

Karl G Linden

Oliver R Lawal

Samuel L Hayes

Hodon Ryu

Affiliations

Soon will be listed here.

Abstract

The efficacy of germicidal ultraviolet (UV-C) light emitting diodes (LEDs) was evaluated for inactivating human enteroviruses included on the United States Environmental Protection Agency (EPA)'s Contaminant Candidate List (CCL). A UV-C LED device, emitting at peaks of 260 nm and 280 nm and the combination of 260∣280 nm together, was used to measure and compare potential synergistic effects of dual wavelengths for disinfecting viral organisms. The 260 nm LED proved to be the most effective at inactivating the CCL enteroviruses tested. To obtain 2-log inactivation credit for the 260 nm LED, the fluences (UV doses) required are approximately 8 mJ/cm for coxsackievirus A10 and poliovirus 1, 10 mJ/cm for enterovirus 70, and 13 mJ/cm for echovirus 30. No synergistic effect was detected when evaluating the log inactivation of enteroviruses irradiated by the dual-wavelength UV-C LEDs.

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