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Inactivation of Enterococcus faecalis in simulated wastewater treatment plant effluent by solar photo-Fenton at initial neutral pH

Ortega-Gómez, E., Esteban García, B., Ballesteros Martín, M.M., Fernandez Ibanez, P and Sánchez Pérez, J.A. (2013) Inactivation of Enterococcus faecalis in simulated wastewater treatment plant effluent by solar photo-Fenton at initial neutral pH. Catalysis Today, 209 . pp. 195-200. [Journal article]

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URL: http://dx.doi.org/10.1016/j.cattod.2013.03.001

DOI: 10.1016/j.cattod.2013.03.001

Abstract

Enterococcus faecalis inactivation was carried out by solar photo-Fenton at initial neutral pH in com- pound parabolic collectors with 20 mg L−1 of Fe2+ and 50 mg L−1 of H2 O2 in different matrices [saline solution (0.9% NaCl), saline solution with resorcinol and a simulated secondary effluent from a munic- ipal wastewater treatment plant (SEWWTP)]. The effects of mechanical stress, acidic pH, solar light, solar light/H2O2 and Fenton reaction were determined. Sunlight led to a 2-log bacterial decrease while H2 O2 (50 mg L−1 ) with solar light decreased E. faecalis concentration from 106 to 102 CFU mL−1 and 1-log for Fenton reaction after 100 min of treatment. The chemical composition of water matrix was shown to have a marked influence on E. faecalis inactivation by solar photo-Fenton. The detection limit was reached within 55 min in the saline solution. The presence of resorcinol (Dissolved Organic Carbon: 10 mg L−1 ) reduced the treatment time by 10 min; whilst a 15 min reduction was observed in SEWWTP and the final pH returned to neutral. E. faecalis inactivation results were satisfactorily fitted to a modified version of the classical Chick–Watson model. The kinetic constants were 0.193 ± 0.005 min−1 for saline solution, 0.294±0.016min−1 forsalinesolutionwithresorcinol,and0.330±0.019min−1 forSEWWTP.

Item Type:Journal article
Keywords:Disinfection; Enterococcus faecalis; Neutral pH Photo-Fenton; Wastewater; Resorcinol
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:37006
Deposited By: Dr Pilar Fernandez-Ibanez
Deposited On:09 Mar 2017 09:53
Last Modified:17 Oct 2017 16:27

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