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César Pulgarin

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Related publications (233)

The antagonistic and synergistic effects of temperature during solar disinfection of synthetic secondary effluent

A 4-factor, multilevel, full factorial design of 240 experiments was performed in order to investigate the effect of temperature on the inactivation efficiency of spiked Escherichia coli in simulated solar disinfection of a synthetic secondary effluent. Th ...

Elsevier2014

Comparison of HIPIMS sputtered Ag- and Cu-surfaces leading to accelerated bacterial inactivation in the dark

Juan Kiwi, César Pulgarin, Oualid Baghriche, Sami Rtimi

Recently, compact uniform and adhesive films of Ag and Cu have been prepared by DC-magnetron sputtering (DC), pulsed DC magnetron sputtering (DCP) and high power impulse magnetron sputtering (HIPIMS). This study reports the HIPIMS deposition for Ag and Cu ...

Elsevier Science Sa2014

Relevant impact of irradiance (vs. dose) and evolution of pH and mineral nitrogen compounds during natural water disinfection by photo-Fenton in a solar CPC reactor

César Pulgarin, Juliette Ndounla

The inactivation of total coliforms/E. coli (10(4) CFU/mL) and Salmonella spp. (10(5) CFU/mL) in well water naturally containing dissolved (Fe2+/3+) and solid iron forms (e.g. iron oxides) was carried out by photo Fenton treatment (Fe-2+,Fe-3+/H2O2/hv). In ...

Elsevier2014

Effect of surface pretreatment of TiO2 films on interfacial processes leading to bacterial inactivation in the dark and under light irradiation

Michaël Bensimon, Juan Kiwi, César Pulgarin, Rosendo Sanjines, Sami Rtimi, Jelena Nesic

Evidence is presented for radio-frequency plasma pretreatment enhancing the amount and adhesion of TiO2 sputtered on polyester (PES) and on polyethylene (PE) films. Pretreatment is necessary to attain a suitable TiO2 loading leading to an acceptable Escher ...

Royal Society, The2014

Degradation of emergent contaminants by UV, UV/H2O2 and neutral photo-fenton at pilot scale in a domestic wastewater treatment plant

Luiz Felippe De Alencastro, Dominique Grandjean, César Pulgarin, Anoys Magnet, Natalia de la Cruz

This study focuses on the removal of 22 selected micropollutants in an effluent from a municipal wastewater treatment plant (MWTP) at pilot scale. A reactor of 37 L with five low pressure mercury lamps emitting at 254 nm (UV254) was used. The 22 micropollu ...

Elsevier2013

Accelerated bacterial inactivation obtained by HIPIMS sputtering on low cost surfaces with concomitant reduction in the metal/semiconductor content

Juan Kiwi, César Pulgarin, Oualid Baghriche, Sami Rtimi

Novel ultrathin TiO2-Cu nanoparticulate films sputtered by highly ionized pulsed plasma magnetron sputtering (HIPIMS) lead to faster bacterial inactivation compared to more traditional sputtering approaches with an appreciable metal saving. HIPIMS sputteri ...

RSC Publishing2013

Growth of TiO2/Cu films by HiPIMS for accelerated bacterial loss of viability

Juan Kiwi, César Pulgarin, Oualid Baghriche, Sami Rtimi

This study shows the first complete report on ultrathin TiO2/Cu nano-particulate films sputtered by highly ionized pulsed plasma magnetron sputtering (HIPIMS) leading to fast bacterial loss of viability. The Cu- and the TiO2/Cu sputtered films induced comp ...

Elsevier2013

RF-plasma pretreatment of surfaces leading to TiO2 coatings with improved optical absorption and OH-radical production

Juan Kiwi, César Pulgarin, Christophe Roussel, Oualid Baghriche, Sami Rtimi

Evidence is presented for the RF pretreatment of polyester enhances the TiO2 coating generation of oxidative species/radicals under a low level actinic light irradiation. After 30 min RF-plasma pretreatment of the polyester samples, the fastest bacterial i ...

Elsevier2013

Coupling of narrow and wide band-gap semiconductors on uniform films active in bacterial disinfection under low intensity visible light: Implications of the interfacial charge transfer (IFCT)

Juan Kiwi, César Pulgarin, Rosendo Sanjines, Sami Rtimi

This study reports the design, preparation, testing and surface characterization of uniform films deposited by sputtering Ag and Ta on non-heat resistant polyester to evaluate the Escherichia coil inactivation by TaON, TaN/Ag, Ag and TaON/Ag polyester. Co- ...

Elsevier2013

Impact of different light intermittence regimes on bacteria during simulated solar treatment of secondary effluent: Implications of the inserted dark periods

César Pulgarin, Stefanos Giannakis

In this study, the effect of light intermittence on solar disinfection of secondary treated wastewater was investigated. Synthetic secondary effluent was spiked with Escherichia coli and submitted to 3 different light intermittence regimes by circulating t ...

Pergamon-Elsevier Science Ltd2013

Oxygen Distribution of Fluorine-doped Tin Oxide Films Coated on Float Glass along Depth Before and After Heat Treatment

Juan Kiwi, César Pulgarin

Fluorine-doped tin oxide (FTO) films were deposited on float glass to create low-emissivity glass (low-E glass) by atmospheric pressure chemical vapor deposition (APCVD). Heat treatments were carried out to assess its antioxidant properties. The surface mo ...

Wiley Periodicals, Inc2013

TiON and TiON-Ag sputtered surfaces leading to bacterial inactivation under indoor actinic light

Michaël Bensimon, Juan Kiwi, César Pulgarin, Rosendo Sanjines, Oualid Baghriche, Sami Rtimi

This study reports the details Escherichia coli inactivation kinetics on TiON and TiON-Ag films sputtered on polyester by direct current reactive magnetron sputtering (DC) and pulsed magnetron sputtering (DCP) in an Ar/N2 /O2 atmosphere. The use of TiON le ...

2013

RF-plasma pretreatment of surfaces leading to TiO2 coatings with improved optical absorption and OH-radical production (vol 130, pg 65, 2013)

Juan Kiwi, César Pulgarin, Christophe Roussel, Oualid Baghriche, Sami Rtimi

Elsevier2013

Comparative effect of simulated solar light, UV, UV/H202 and photo-Fenton treatment (UV Vis/H2O2/Fe-2+,Fe-3+) in the Escherichia colt inactivation in artificial seawater

César Pulgarin

Innovative disinfection technologies are being studied for seawater, seeking a viable alternative to chlorination. This study proposes the use of H2O2/UV254 and photo-Fenton as disinfection treatment in seawater. The irradiations were carried out using a s ...

Elsevier2013

Innovative semi-transparent nanocomposite films presenting photo-switchable behavior and leading to a reduction of the risk of infection under sunlight

Juan Kiwi, César Pulgarin, Rosendo Sanjines, Sami Rtimi

Novel sputtered polyethylene-TiO2 (PE-TiO2) thin films induce fast bacterial inactivation with concomitant photo-switchable hydrophobic to hydrophilic transition under light. RF-plasma pretreatments allowed an increased TiO2 loading on PE, favorably affect ...

Royal Soc Chemistry2013

Inactivation by solar photo-Fenton in pet bottles of wild enteric bacteria of natural well water: Absence of re-growth after one week of subsequent storage

César Pulgarin, Juliette Ndounla

Iron photo-assisted inactivation of wild enteric bacteria (total coliforms/E. coil and Salmonella spp.) was carried out in water from the Sahelian wells having different pH (W1:4.9 and W2: 6.3) and a natural iron content of 0.07 mg/L We evaluate the effici ...

Elsevier2013

Evidence for TiON sputtered surfaces showing accelerated antibacterial activity under simulated solar irradiation

Michaël Bensimon, Juan Kiwi, César Pulgarin, Sami Rtimi

New evidence is reported for TiON sputtered polyester surfaces activated by sunlight irradiation leading to the accelerated bacterial inactivation in the minute range. The absorption in Kubelka-Munk units of the TiON film was observed to be directly propor ...

Elsevier2013

Self-Cleaning Textiles Modified by TiO2 and Bactericide Textiles Modified by Ag and Cu

Lioubov Kiwi, César Pulgarin

During the last few years the development of innovative textiles with added value has become a focus of interest in the textile industry. The use of TiO2 and TiO2/SiO2 in the form of semiconductor colloids or/and powders or a combination of both leads to p ...

John Wiley & Sons, Ltd2013

ZrNO-Ag co-sputtered surfaces leading to E. coli inactivation under actinic light: Evidence for the oligodynamic effect

Michaël Bensimon, Juan Kiwi, César Pulgarin, Rosendo Sanjines, Mirela Pascu, Sami Rtimi

This study reports visible light sensitive ZrNO and ZrNO-Ag polyester samples prepared by sputtering in an Ar/N-2/O-2 atmosphere leading to Escherichia coil bacterial inactivation. The bacterial inactivation by ZrNO avoids the increasing environmental conc ...

Elsevier2013

Degradation of 37 emergent contaminants by UV and neutral fenton and photo-fenton in domestic wastewater effluent previously treated by activated sludge

Luiz Felippe De Alencastro, Dominique Grandjean, César Pulgarin, Natalia de la Cruz

This study focuses on the removal of 32 selected micropollutants (pharmaceuticals, corrosion inhibitors and biocides/pesticides) found in an effluent coming from a municipal wastewater treatment plant (MWTP) based on activated sludge. Dissolved organic mat ...

Elsevier2012

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