Δημοσιεύσεις σε Περιοδικά

Μόνιμο URI για αυτήν τη συλλογήhttps://dspace.library.tuc.gr/handle/123456789/135

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Πλοήγηση Δημοσιεύσεις σε Περιοδικά ανά Συγγραφέα "Apostolos Vantarakis"

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  • Δεν υπάρχει διαθέσιμη μικρογραφία
    Δημοσίευση
    Sorption of Pseudomonas putida onto differently structured kaolinite minerals
    (2015) Chrysikopoulos Constantinos; Χρυσικοπουλος Κωνσταντινος; Maria I. Bellou; Maria A. Tselepi; Vasiliki I. Syngouna; Petros A. Kokkinos; Apostolos Vantarakis; Spyros C. Paparrodopoulos
    Human adenoviruses (hAdVs) are pathogenic viruses responsible for public health problems worldwide. They have also been used as viral indicators in environmental systems. Coliphages (e.g., MS2, ΦX174) have also been studied as indicators of viral pollution in fecally contaminated water. Our objective was to evaluate the distribution of three viral fecal indicators (hAdVs, MS2, and ΦΧ174), between two different phyllosilicate clays (kaolinite and bentonite) and the aqueous phase. A series of static and dynamic experiments were conducted under two different temperatures (4, 25 °C) for a time period of seven days. HAdV adsorption was examined in DNase I reaction buffer (pH=7.6, and ionic strength (IS)=1.4 mM), whereas coliphage adsorption in phosphate buffered saline solution (pH=7, IS=2 mM). Moreover, the effect of IS on hAdV adsorption under static conditions was evaluated. The adsorption of hAdVwas assessed by real-time PCR and its infectivitywas tested by cultivation methods. The coliphages MS2 and ΦΧ174 were assayed by the double-layer overlay method. The experimental results have shown that coliphage adsorption onto both kaolinite and bentonite was higher for the dynamic than the static experiments; whereas hAdV adsorption was lower under dynamic conditions. The adsorption of hAdV increased with decreasing temperature, contrary to the results obtained for the coliphages. This study examines the combined effect of temperature, agitation, clay type, and IS on hAdV adsorption onto clays. The results provide useful new information on the effective removal of viral fecal indicators (MS2, ΦX174 and hAdV) from dilute aqueous solutions by adsorption onto kaolinite and bentonite
  • Δεν υπάρχει διαθέσιμη μικρογραφία
    Δημοσίευση
    Transport of human adenoviruses in water saturated laboratory columns
    (2015) Chrysikopoulos Constantinos; Χρυσικοπουλος Κωνσταντινος; P. Kokkinos; V. I. Syngouna; M. A. Tselepi; M. Bellou; Apostolos Vantarakis
    Groundwatermay be contaminated with infective human enteric viruses from various wastewater discharges, sanitary landfills, septic tanks, agricultural practices, and artificial groundwater recharge. Coliphages have been widely used as surrogates of enteric viruses, because they share many fundamental properties and features.Although a large number of studies focusing on various factors (i.e. pore water solution chemistry, fluid velocity, moisture content, temperature, and grain size) that affect biocolloid (bacteria, viruses) transport have been published over the past two decades, little attention has been given toward human adenoviruses (hAdVs). The main objective of this study was to evaluate the effect of pore water velocity on hAdV transport in water saturated laboratory- scale columns packed with glass beads. The effects of pore water velocity on virus transport and retention in porous media was examined at three pore water velocities (0.39, 0.75, and 1.22 cm/min). The results indicated that all estimated averagemass recovery values forhAdVwere lower than those of coliphages, which were previously reported in the literature by others for experiments conducted under similar experimental conditions.