The effects of ionic strength and organic matter on virus inactivation at low temperatures [Elektronisk resurs] general likelihood uncertainty estimation (GLUE) as an alternative to least-squares parameter optimization for the fitting of virus inactivation models
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Mayotte, Jean-Marc (författare)
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Grabs, Thomas 1980- (författare)
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Sutliff-Johansson, Stacy (författare)
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Bishop, Kevin 1960- (författare)
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Uppsala universitet Teknisk-naturvetenskapliga vetenskapsområdet (utgivare)
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Uppsala universitet Teknisk-naturvetenskapliga vetenskapsområdet (utgivare)
- 2017
- Engelska.
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Ingår i: Hydrogeology Journal. - 1431-2174. ; 25:4, 1063-1076
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Sammanfattning
Ämnesord
Stäng
- This study examined how the inactivation of bacteriophage MS2 in water was affected by ionic strength (IS) and dissolved organic carbon (DOC) using static batch inactivation experiments at 4 A degrees C conducted over a period of 2 months. Experimental conditions were characteristic of an operational managed aquifer recharge (MAR) scheme in Uppsala, Sweden. Experimental data were fit with constant and time-dependent inactivation models using two methods: (1) traditional linear and nonlinear least-squares techniques; and (2) a Monte-Carlo based parameter estimation technique called generalized likelihood uncertainty estimation (GLUE). The least-squares and GLUE methodologies gave very similar estimates of the model parameters and their uncertainty. This demonstrates that GLUE can be used as a viable alternative to traditional least-squares parameter estimation techniques for fitting of virus inactivation models. Results showed a slight increase in constant inactivation rates following an increase in the DOC concentrations, suggesting that the presence of organic carbon enhanced the inactivation of MS2. The experiment with a high IS and a low DOC was the only experiment which showed that MS2 inactivation may have been time-dependent. However, results from the GLUE methodology indicated that models of constant inactivation were able to describe all of the experiments. This suggested that inactivation time-series longer than 2 months were needed in order to provide concrete conclusions regarding the time-dependency of MS2 inactivation at 4 A degrees C under these experimental conditions.
Ämnesord
- Natural Sciences (hsv)
- Earth and Related Environmental Sciences (hsv)
- Oceanography, Hydrology, Water Resources (hsv)
- Naturvetenskap (hsv)
- Geovetenskap och miljövetenskap (hsv)
- Oceanografi, hydrologi, vattenresurser (hsv)
- Engineering and Technology (hsv)
- Civil Engineering (hsv)
- Water Engineering (hsv)
- Teknik och teknologier (hsv)
- Samhällsbyggnadsteknik (hsv)
- Vattenteknik (hsv)
Indexterm och SAB-rubrik
- Virus inactivation
- Uncertainty
- Groundwater management
- Bacteriophage MS2
- Health
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