Modeling the photoinactivation and transport of somatic and F‐specific coliphages at a Great Lakes beach
| Autor: | Ammar Safaie, Gene Whelan, Tuan D. Nguyen, Richard G. Zepp, Mantha S. Phanikumar, Marirosa Molina, Yakov Pachepsky, Brad Acrey, Michael Cyterski, Chelsea J. Weiskerger |
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| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Context (language use) 010501 environmental sciences Management Monitoring Policy and Law medicine.disease_cause Coliphages 01 natural sciences Article Bacteriophage Feces Escherichia coli medicine Coliphage Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Indicator organism biology Ecology 04 agricultural and veterinary sciences Contamination biology.organism_classification Pollution Lakes 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Water Microbiology Enterococcus |
| Zdroj: | J Environ Qual |
| ISSN: | 1537-2537 0047-2425 |
| DOI: | 10.1002/jeq2.20153 |
| Popis: | Fecal indicator organisms (FIOs), such as Escherichia coli and enterococci, are often used as surrogates of contamination in the context of beach management; however, bacteriophages may be more reliable indicators than FIO due to their similarity to viral pathogens in terms of size and persistence in the environment. In the past, mechanistic modeling of environmental contamination has focused on FIOs, with virus and bacteriophage modeling efforts remaining limited. In this paper, we describe the development and application of a fate and transport model of somatic and F-specific coliphages for the Washington Park beach in Lake Michigan, which is affected by riverine outputs from the nearby Trail Creek. A three-dimensional model of coliphage transport and photoinactivation was tested and compared with a previously reported E. coli fate and transport model. The light-based inactivation of the phages was modeled using organism-specific action spectra. Results indicate that the coliphage models outperformed the E. coli model in terms of reliably predicting observed E. coli/coliphage concentrations at the beach. This is possibly due to the presence of additional E. coli sources that were not accounted for in the modeling. The coliphage models can be used to test hypotheses about potential sources and their behavior and for predictive modeling. |
| Databáze: | OpenAIRE |
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