Ultraviolet and ionizing radiation for microorganism inactivation

Water Research
Fariborz Taghipour

Abstract

The impacts of UV irradiation, gamma irradiation, and a combination of both on Escherichia coli inactivation in primary and secondary wastewater effluents were investigated. UV doses of 35 and 62 J/m(2) were required for a 1-log inactivation of E. coli in the primary and secondary wastewater samples, respectively. A gamma dose of 170 Gy (J/kg) was required for a 1-log inactivation of E. coli in both wastewater samples. Variation in gamma radiation dose rates did not have a significant impact on the extent of inactivation at a given total dose. Gamma irradiation of previously UV-irradiated samples indicated that particle-associated microorganisms, which are protected from UV, can be inactivated by ionizing radiation at a rate similar to that for free microorganism inactivation. An estimation of the energy required for disinfection indicated that, in general, the required energy and the energy cost for E. coli inactivation using ionizing radiation are considerably higher than those for UV radiation.

Citations

Jun 3, 2014·Journal of Hazardous Materials·J O Saucedo-LuceroR Muñoz
Feb 21, 2013·Environmental Science and Pollution Research International·Kristina Y NelsonTakaya Ono
Aug 27, 2014·International Journal of Molecular Sciences·Anton ValkovMarina Nisnevitch
May 12, 2015·Marine Pollution Bulletin·Ranveig Ottoey OlsenIngunn Alne Hoell
Sep 16, 2015·Radiation and Environmental Biophysics·Sandra Cabo VerdePaula Matos
Apr 7, 2011·Water Environment Research : a Research Publication of the Water Environment Federation·J M PoyatosF Osorio
Jun 5, 2013·Food Science and Technology International = Ciencia Y Tecnología De Los Alimentos Internacional·Yan ZhuTing Zhou
Dec 31, 2020·International Journal of Environmental Research and Public Health·Maria Cristina CollivignarelliSabrina Sorlini
Mar 30, 2006·Environmental Science & Technology·D Angelo Sozzi, Fariborz Taghipour

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