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dc.contributor.author
Alvear Daza, John Jairo  
dc.contributor.author
Sanabria, Janeth  
dc.contributor.author
Rengifo Herrera, Julian Andres  
dc.contributor.author
Gutierrez Zapata, Hector M.  
dc.date.available
2019-08-26T20:23:43Z  
dc.date.issued
2018-09-01  
dc.identifier.citation
Alvear Daza, John Jairo; Sanabria, Janeth; Rengifo Herrera, Julian Andres; Gutierrez Zapata, Hector M.; Simultaneous abatement of organics (2,4-dichlorophenoxyacetic acid) and inactivation of resistant wild and laboratory bacteria strains by photo-induced processes in natural groundwater samples; Pergamon-Elsevier Science Ltd; Solar Energy; 171; 1-9-2018; 761-768  
dc.identifier.issn
0038-092X  
dc.identifier.uri
http://hdl.handle.net/11336/82163  
dc.description.abstract
Simultaneous abatement of 2,4-dichlorophenoxyacetic acid (2,4-D at 70 µg L−1), Escherichia coli and Klebsiella pneumoniae (laboratory and wild strains) cells from real groundwater samples containing natural iron concentrations (∼0.3 mg L−1) was studied by addition of H2O2 (10 mg L−1) using a 18-L compound parabolic collector-CPC solar reactor (under natural sunlight irradiation 150,000 J m−2) equipped with a UV-(A + B + Visible) lamp (15 W: UV-B and UV-A intensities were 0.74 and 6.47 W m−2 respectively) powered by a photovoltaic panel. Viability of E. coli K12 and K. pneumoniae laboratory strains at high initial concentrations of 106–107 cells mL−1 (followed by DVC-FISH) dropped 4.69 and 2.18 Logs, respectively after 30 min t30W of combined UV-A + B-Visible lamps and sunlight irradiation (SL + UV + H2O2). Moreover, the initial 2,4-D concentration underwent a strong reduction reaching concentrations below the detection limit after 5 min t30W of SL + UV + H2O2 treatment. Regarding real wild bacteria strains often present in natural well waters, which were at low initial concentrations, total culturability (initial concentration 101 CFU mL−1) and viability (initial concentration 102–103 cells mL−1) reductions were reached after 30 min (t30W) of combined treatment. Participation of several photochemical and dark events such as photocatalysis (by iron hydro-oxides and other metal oxides naturally present), Fenton and photo-Fenton (by natural dissolved iron), UV-A + B/NO3 −, Dissolved organic matter (DOM)/UV + Vis and UV-B photolysis of H2O2 are suggested as responsible of simultaneous 2,4-D abatement and microbial inactivation in natural groundwater samples.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Pergamon-Elsevier Science Ltd  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/  
dc.subject
Drinking Water  
dc.subject
Photo-Fenton  
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Solar Water Detoxification  
dc.subject
Solar Water Disinfection  
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Well Waters  
dc.subject.classification
Otras Ciencias Químicas  
dc.subject.classification
Ciencias Químicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Simultaneous abatement of organics (2,4-dichlorophenoxyacetic acid) and inactivation of resistant wild and laboratory bacteria strains by photo-induced processes in natural groundwater samples  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-07-24T18:02:39Z  
dc.journal.volume
171  
dc.journal.pagination
761-768  
dc.journal.pais
Estados Unidos  
dc.description.fil
Fil: Alvear Daza, John Jairo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina  
dc.description.fil
Fil: Sanabria, Janeth. Universidad del Valle. Facultad de Ingenieria. Escuela de Ingeniería de los Recursos Naturales y del Ambiente. Laboratorio de Microbiología Ambiental y Anaerobia; Colombia  
dc.description.fil
Fil: Rengifo Herrera, Julian Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina  
dc.description.fil
Fil: Gutierrez Zapata, Hector M.. Universidad del Valle. Facultad de Ingeniería. Escuela de Ingeniería de los Recursos Naturales y del Ambiente. Laboratorio de Microbiología Ambiental y Anaerobia; Colombia  
dc.journal.title
Solar Energy  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0038092X18306911  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.solener.2018.07.026