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Nicolas Kalogerakis is Professor of Biochemical Engineering at the TU-Crete (Greece) where he has served as Vice-President of the University Council and as Department Head (twice). Prior to that he was a Professor at SUNY-Buffalo (USA) and at the University of Calgary (Canada). He holds a Diploma in Chemical Engineering from NTUA (Athens), an MEng from McGill University and a PhD from the University of Toronto. His area of expertise includes environmental biotechnology focusing on bioremediation and phytoremediation technologies for the restoration of contaminated sites; protection and restoration of the marine environment (emphasis on oil spills, deep sea releases; plastics and microplastics); novel oxygenation systems and wastewater treatment. Currently his group is participating in 3 EU-funded research projects (H2020) and he is the coordinator of an ERA-MIN2 project (nanoBT). He was the coordinator of the large FP7-project KILL*SPILL. Prof. Kalogerakis’ publication record includes six patents, one book and 220 articles in referred journals. He has been an invited speaker in several conferences and academic institutions worldwide. He has >14500 citations & H-index of 66 (Google Scholar, June 2021). He has served as a member of the European Commission Environment Committee (2007-2011) and as Sherpa at the European Commission High Level Group on Key Enabling Technologies (2013-2015). In 2017, he was the recipient of the TU-Crete Research Excellence award.
Microplastics(ISSN: 2673-8929)
Nicolas Kalogerakis. Microplastics—A New Journal on the Environmental Challenges and Adverse Health Effects of Microplastics. Microplastics 2021, 1, 1 -2.
AMA StyleNicolas Kalogerakis. Microplastics—A New Journal on the Environmental Challenges and Adverse Health Effects of Microplastics. Microplastics. 2021; 1 (1):1-2.
Chicago/Turabian StyleNicolas Kalogerakis. 2021. "Microplastics—A New Journal on the Environmental Challenges and Adverse Health Effects of Microplastics." Microplastics 1, no. 1: 1-2.
Plastic pollution is presently one of the most widespread and minimally understood problems. Vast quantities of plastics that have entered the marine environment should be detected floating on the sea surface are seemingly missing from the global budget. A vertical transfer process should be able to explain the imbalance in mass, as well as the findings of buoyant plastics at the bottom of the sea. These processes are of paramount importance to modelling efforts on the fate of plastics and microplastics in the marine environment. In order to fill this gap and develop correlations that could be used in modelling activities, we have designed and performed a 300-day long field experiment to monitor the interactions between microplastics (pellets and films) and the marine environment for five types of plastic polymers. Fouling, changes in diameter, gravimetric weight and sinking velocity were monitored and the correlations between them were studied using principal component analysis (PCA). Density, fouling and sample form (strip or pellet) were found to greatly affect the sinking characteristics of the polymers, leading to an increase or decrease in the sinking velocity. Finally, mathematical expressions for the estimation of fouling attachment and the sinking velocity with respect to time for each type of plastic were determined from the experimental data.
Katerina Karkanorachaki; Evdokia Syranidou; Nicolas Kalogerakis. Sinking characteristics of microplastics in the marine environment. Science of The Total Environment 2021, 793, 148526 .
AMA StyleKaterina Karkanorachaki, Evdokia Syranidou, Nicolas Kalogerakis. Sinking characteristics of microplastics in the marine environment. Science of The Total Environment. 2021; 793 ():148526.
Chicago/Turabian StyleKaterina Karkanorachaki; Evdokia Syranidou; Nicolas Kalogerakis. 2021. "Sinking characteristics of microplastics in the marine environment." Science of The Total Environment 793, no. : 148526.
Typically, oil pollution cleanup procedures following first response actions include dispersion. Crude oil is biodegradable, and its bioavailability can be increased when dispersed into very fine droplets by means of chemical surfactants. Although their use is widely spread in many applications, the latter may prove toxic, depending on the extent of use. The use of biological means, such as bioremediation and biosurfactants, has emerged over the past years as a very promising ‘green’ alternative technology. Biosurfactants (BSs) are amphiphilic molecules produced by microorganisms during biodegradation, thus increasing the bioavailability of the organic pollutants. It is their biodegradability and low toxicity that render BSs as a very promising alternative to the synthetic ones. Alcanivorax borkumensis SK2 strain ability to produce BSs, without any impurities from the substrate, was investigated. The biosurfactant production was scaled up by means of a sequencing batch reactor (SBR) and a heavy oil residue substrate as the carbon source. The product is free from substrate impurities, and its efficiency is tested on oil bioremediation in the marine environment. The product’s dispersion efficiency was determined by the baffled flask test. The production method proposed can have a significant impact to the market, given the ever-increasing demand for ecologically friendly, reliable, commercially viable and economically competitive environmental cleanup techniques.
Athina Mandalenaki; Nicolas Kalogerakis; Eleftheria Antoniou. Production of High Purity Biosurfactants Using Heavy Oil Residues as Carbon Source. Energies 2021, 14, 3557 .
AMA StyleAthina Mandalenaki, Nicolas Kalogerakis, Eleftheria Antoniou. Production of High Purity Biosurfactants Using Heavy Oil Residues as Carbon Source. Energies. 2021; 14 (12):3557.
Chicago/Turabian StyleAthina Mandalenaki; Nicolas Kalogerakis; Eleftheria Antoniou. 2021. "Production of High Purity Biosurfactants Using Heavy Oil Residues as Carbon Source." Energies 14, no. 12: 3557.
Nanobubble (NB) technology has advanced significantly over the last two decades. Many theoretical and technological advances have been made, including the development of novel devices for NB generation. Proof of principle has been demonstrated primarily at laboratory scale and very encouraging results have been obtained. Yet reports on applications in the field (for ecosystem restoration) or at industrial or large pilot scale (for wastewater treatment) are lacking. In this paper, five field applications of an industrial strength nanobubble generator are presented and key environmental quality parameters have been measured and are presented here. The results indicate the highly successful application of NB technology; however, in most cases the lack of benchmarking does not allow for a quantitative comparison of the benefits of this technology. However, the presented results provide convincing evidence that NB technology works beyond the bench scale in the field and in industrial testing trials. For example, a 1600 m3 winery wastewater pond was fully restored in 10 weeks and the energy required for COD removal was estimated at 0.515 kWh/kg-COD. The presented results are a strong indicator of the potential success of the NB technology in environmental applications.
Nicolas Kalogerakis; Georgina Calypso Kalogerakis; Quartus Paulus Botha. Environmental applications of nanobubble technology: Field testing at industrial scale. The Canadian Journal of Chemical Engineering 2021, 1 .
AMA StyleNicolas Kalogerakis, Georgina Calypso Kalogerakis, Quartus Paulus Botha. Environmental applications of nanobubble technology: Field testing at industrial scale. The Canadian Journal of Chemical Engineering. 2021; ():1.
Chicago/Turabian StyleNicolas Kalogerakis; Georgina Calypso Kalogerakis; Quartus Paulus Botha. 2021. "Environmental applications of nanobubble technology: Field testing at industrial scale." The Canadian Journal of Chemical Engineering , no. : 1.
The diversity and degradation capacity of hydrocarbon-degrading consortia from surface and deep waters of the Eastern Mediterranean Sea were studied in time-series experiments. Microcosms were set up in ONR7a medium at in situ temperatures of 25 °C and 14 °C for the Surface and Deep consortia, respectively, and crude oil as the sole source of carbon. The Deep consortium was additionally investigated at 25 °C to allow the direct comparison of the degradation rates to the Surface consortium. In total, ~50% of the alkanes and ~15% of the polycyclic aromatic hydrocarbons were degraded in all treatments by Day 24. Approximately ~95% of the total biodegradation by the Deep consortium took place within 6 days regardless of temperature, whereas comparable levels of degradation were reached on Day 12 by the Surface consortium. Both consortia were dominated by well-known hydrocarbon-degrading taxa. Temperature played a significant role in shaping the Deep consortia communities with Pseudomonas and Pseudoalteromonas dominating at 25 °C and Alcanivorax at 14 °C. Overall, the Deep consortium showed a higher efficiency for hydrocarbon degradation within the first week following contamination, which is critical in the case of oil spills, and thus merits further investigation for its exploitation in bioremediation technologies tailored to the Eastern Mediterranean Sea.
Georgia Charalampous; Efsevia Fragkou; Konstantinos Kormas; Alexandre Menezes; Paraskevi Polymenakou; Nikos Pasadakis; Nicolas Kalogerakis; Eleftheria Antoniou; Evangelia Gontikaki. Comparison of Hydrocarbon-Degrading Consortia from Surface and Deep Waters of the Eastern Mediterranean Sea: Characterization and Degradation Potential. Energies 2021, 14, 2246 .
AMA StyleGeorgia Charalampous, Efsevia Fragkou, Konstantinos Kormas, Alexandre Menezes, Paraskevi Polymenakou, Nikos Pasadakis, Nicolas Kalogerakis, Eleftheria Antoniou, Evangelia Gontikaki. Comparison of Hydrocarbon-Degrading Consortia from Surface and Deep Waters of the Eastern Mediterranean Sea: Characterization and Degradation Potential. Energies. 2021; 14 (8):2246.
Chicago/Turabian StyleGeorgia Charalampous; Efsevia Fragkou; Konstantinos Kormas; Alexandre Menezes; Paraskevi Polymenakou; Nikos Pasadakis; Nicolas Kalogerakis; Eleftheria Antoniou; Evangelia Gontikaki. 2021. "Comparison of Hydrocarbon-Degrading Consortia from Surface and Deep Waters of the Eastern Mediterranean Sea: Characterization and Degradation Potential." Energies 14, no. 8: 2246.
The microbiome associated with plants used in phytodepuration systems can boost plant growth and services, especially in ecosystems dealing with recalcitrant compounds, hardly removed via traditional wastewater (WW) treatments, such as azo-dyes used in textile industry. In this context, we aimed to study the cultivable microbiome selected by Phragmites australis plants in a Constructed Wetland (CW) in Morocco, in order to obtain candidate inoculants for the phytodepuration of azo-dye contaminated WW. A collection of 152 rhizospheric and endophytic bacteria was established. The strains were phylogenetically identified and characterized for traits of interest in the phytodepuration context. All strains showed Plant Growth Promotion potential in vitro and 67% of them significantly improved the growth of a model plant in vivo compared to the non bacterized control plants. Moreover, most of the isolates were able to grow in presence of several model micropollutants typically found in WW, indicating their potential use in phytodepuration of a wide spectrum of effluents. The six most promising strains of the collection were tested in CW microcosms alone or as consortium: the consortium and two single inocula demonstrated to significantly increase the removal of the model azo-dye Reactive Black 5 compared to the non bacterized controls.
Valentina Riva; Francesca Mapelli; Evdokia Syranidou; Elena Crotti; Redouane Choukrallah; Nicolas Kalogerakis; Sara Borin. Root Bacteria Recruited by Phragmites australis in Constructed Wetlands Have the Potential to Enhance Azo-Dye Phytodepuration. Microorganisms 2019, 7, 384 .
AMA StyleValentina Riva, Francesca Mapelli, Evdokia Syranidou, Elena Crotti, Redouane Choukrallah, Nicolas Kalogerakis, Sara Borin. Root Bacteria Recruited by Phragmites australis in Constructed Wetlands Have the Potential to Enhance Azo-Dye Phytodepuration. Microorganisms. 2019; 7 (10):384.
Chicago/Turabian StyleValentina Riva; Francesca Mapelli; Evdokia Syranidou; Elena Crotti; Redouane Choukrallah; Nicolas Kalogerakis; Sara Borin. 2019. "Root Bacteria Recruited by Phragmites australis in Constructed Wetlands Have the Potential to Enhance Azo-Dye Phytodepuration." Microorganisms 7, no. 10: 384.
A carbon-14 radiotracer-based study revealed that water promoted mineralization and photo-oxidation of polystyrene nanoplastics with significant amounts of carbon leached out.
Lili Tian; Qianqian Chen; Wei Jiang; Lianhong Wang; Huixiang Xie; Nicolas Kalogerakis; Yini Ma; Rong Ji. A carbon-14 radiotracer-based study on the phototransformation of polystyrene nanoplastics in water versus in air. Environmental Science: Nano 2019, 6, 2907 -2917.
AMA StyleLili Tian, Qianqian Chen, Wei Jiang, Lianhong Wang, Huixiang Xie, Nicolas Kalogerakis, Yini Ma, Rong Ji. A carbon-14 radiotracer-based study on the phototransformation of polystyrene nanoplastics in water versus in air. Environmental Science: Nano. 2019; 6 (9):2907-2917.
Chicago/Turabian StyleLili Tian; Qianqian Chen; Wei Jiang; Lianhong Wang; Huixiang Xie; Nicolas Kalogerakis; Yini Ma; Rong Ji. 2019. "A carbon-14 radiotracer-based study on the phototransformation of polystyrene nanoplastics in water versus in air." Environmental Science: Nano 6, no. 9: 2907-2917.
Bioremediation is emerging as the best strategy for combating oil spills following first response actions. Stimulation of indigenous degraders with suitable nutrients and augmentation with oil-degrading bacteria can significantly enhance bioremediation rates of polluted marine environments with petroleum hydrocarbons. In this review, we are focusing on the conditions under which bioremediation leads to increased effectiveness and novel combined bioaugmentation/biostimulation strategies are suggested for the successful remediation of polluted marine environments.
Maria Nikolopoulou; Nicolas Kalogerakis. Petroleum Spill Control With Biological Means. Comprehensive Biotechnology 2019, 197 -210.
AMA StyleMaria Nikolopoulou, Nicolas Kalogerakis. Petroleum Spill Control With Biological Means. Comprehensive Biotechnology. 2019; ():197-210.
Chicago/Turabian StyleMaria Nikolopoulou; Nicolas Kalogerakis. 2019. "Petroleum Spill Control With Biological Means." Comprehensive Biotechnology , no. : 197-210.
The occurrence of emerging organic contaminants (EOCs) in wastewaters and the inability of the conventional wastewater treatments plants to deal with them have been pointed out several times over the last few years. As a result, remnants of those compounds released into the aquatic environment present a potential risk for public health. Constructed wetlands (CWs) have been proposed as environmentally friendly, low-cost alternative systems with satisfactory results for different types of contaminants. This study aimed to evaluate the efficiency of a CW system, planted with the halophyte Juncus acutus, to eliminate bisphenol A (BPA) and two antibiotics, namely ciprofloxacin (CIP) and sulfamethoxazole (SMX) under different operating conditions. The behavior of Escherichia coli and enterococcal populations in terms of changes in their resistance profile for the selected antibiotics and the abundance of two resistance genes (qnrA and sul1) were also examined. BPA and CIP were significantly removed by the CW, with an overall removal of 76.2% and 93.9% respectively and with the plants playing a vital role. In contrast, SMX was not significantly eliminated. Moreover, fluctuations in the antibiotic resistance profile of bacteria were observed. Treatment processes affected the response of the two selected bacterial indicators, depending on the conditions employed in each case. Furthermore, increased levels of resistance genes were monitored in the system effluent. This study indicates that CWs, as tertiary wastewater treatment systems, may demonstrate high removal rates for some but not all EOCs. This implies that each EOC identified in the feed stream should be tested assiduously by analyzing the final effluents before their reuse or discharge into water bodies.
Stavros Christofilopoulos; Andreas Kaliakatsos; Konstantina Triantafyllou; Iosifina Gounaki; Danae Venieri; Nicolas Kalogerakis. Evaluation of a constructed wetland for wastewater treatment: Addressing emerging organic contaminants and antibiotic resistant bacteria. New Biotechnology 2019, 52, 94 -103.
AMA StyleStavros Christofilopoulos, Andreas Kaliakatsos, Konstantina Triantafyllou, Iosifina Gounaki, Danae Venieri, Nicolas Kalogerakis. Evaluation of a constructed wetland for wastewater treatment: Addressing emerging organic contaminants and antibiotic resistant bacteria. New Biotechnology. 2019; 52 ():94-103.
Chicago/Turabian StyleStavros Christofilopoulos; Andreas Kaliakatsos; Konstantina Triantafyllou; Iosifina Gounaki; Danae Venieri; Nicolas Kalogerakis. 2019. "Evaluation of a constructed wetland for wastewater treatment: Addressing emerging organic contaminants and antibiotic resistant bacteria." New Biotechnology 52, no. : 94-103.
This work sheds light on the physicochemical changes of naturally weathered polymer surfaces along with changes of polymer buoyancy due to biofilm formation and degradation processes. To support the degradation hypothesis, a microcosm experiment was conducted where a mixture of naturally weathered plastic pieces was incubated with an indigenous pelagic community. A series of analyses were employed in order to describe the alteration of the physicochemical characteristics of the polymer (FTIR, SEC and GPC, sinking velocity) as well as the biofilm community (NGS). At the end of phase II, the fraction of double bonds in the surface of microbially treated PE films increased while changes were also observed in the profile of the PS films. The molecular weight of PE pieces increased with incubation time reaching the molecular weight of the virgin pieces (230000 g mol-1) at month 5 but the buoyancy displayed no difference throughout the experimental period. The number-average molecular weight of PS pieces decreased (33% and 27% in INDG and BIOG treatment respectively), implying chain scission; accelerated (by more than 30%) sinking velocities compared to the initial weathered pieces were also measured for PS films with biofilm on their surface. The orders Rhodobacterales, Oceanospirillales and Burkholderiales dominated the distinct platisphere communities and the genera Bacillus and Pseudonocardia discriminate these assemblages from the planktonic counterpart. The functional analysis predicts overrepresentation of adhesive cells carrying xenobiotic and hydrocarbon degradation genes. Taking these into account, we can suggest that tailored marine consortia have the ability to thrive in the presence of mixtures of plastics and participate in their degradation.
Evdokia Syranidou; Katerina Karkanorachaki; Filippo Amorotti; Apostolos Avgeropoulos; Boris Kolvenbach; Ning-Yi Zhou; Fabio Fava; Philippe F.-X. Corvini; Nicolas Kalogerakis. Biodegradation of mixture of plastic films by tailored marine consortia. Journal of Hazardous Materials 2019, 375, 33 -42.
AMA StyleEvdokia Syranidou, Katerina Karkanorachaki, Filippo Amorotti, Apostolos Avgeropoulos, Boris Kolvenbach, Ning-Yi Zhou, Fabio Fava, Philippe F.-X. Corvini, Nicolas Kalogerakis. Biodegradation of mixture of plastic films by tailored marine consortia. Journal of Hazardous Materials. 2019; 375 ():33-42.
Chicago/Turabian StyleEvdokia Syranidou; Katerina Karkanorachaki; Filippo Amorotti; Apostolos Avgeropoulos; Boris Kolvenbach; Ning-Yi Zhou; Fabio Fava; Philippe F.-X. Corvini; Nicolas Kalogerakis. 2019. "Biodegradation of mixture of plastic films by tailored marine consortia." Journal of Hazardous Materials 375, no. : 33-42.
Marine sediments represent an important sink of harmful petroleum hydrocarbons after an accidental oil spill. Electrobioremediation techniques, which combine electrokinetic transport and biodegradation processes, represent an emerging technological platform for a sustainable remediation of contaminated sediments. Here, we describe the results of a long-term mesocosm-scale electrobioremediation experiment for the treatment of marine sediments contaminated by crude oil. A dimensionally stable anode and a stainless-steel mesh cathode were employed to drive seawater electrolysis at a fixed current density of 11 A/m2. This approach allowed establishing conditions conducive to contaminants biodegradation, as confirmed by the enrichment of Alcanivorax borkumensis cells harboring the alkB-gene and other aerobic hydrocarbonoclastic bacteria. Oil chemistry analyses indicated that aromatic hydrocarbons were primarily removed from the sediment via electroosmosis whereas low molecular weight alkanes (nC6 to nC10) via biodegradation.
S. Cappello; Carolina Cruz Viggi; M. Yakimov; S. Rossetti; B. Matturro; L. Molina; A. Segura; S. Marqués; L. Yuste; E. Sevilla; Fernando Rojo; Angela Sherry; Obioma Mejeha; I.M. Head; L. Malmquist; J.H. Christensen; N. Kalogerakis; F. Aulenta. Combining electrokinetic transport and bioremediation for enhanced removal of crude oil from contaminated marine sediments: Results of a long-term, mesocosm-scale experiment. Water Research 2019, 157, 381 -395.
AMA StyleS. Cappello, Carolina Cruz Viggi, M. Yakimov, S. Rossetti, B. Matturro, L. Molina, A. Segura, S. Marqués, L. Yuste, E. Sevilla, Fernando Rojo, Angela Sherry, Obioma Mejeha, I.M. Head, L. Malmquist, J.H. Christensen, N. Kalogerakis, F. Aulenta. Combining electrokinetic transport and bioremediation for enhanced removal of crude oil from contaminated marine sediments: Results of a long-term, mesocosm-scale experiment. Water Research. 2019; 157 ():381-395.
Chicago/Turabian StyleS. Cappello; Carolina Cruz Viggi; M. Yakimov; S. Rossetti; B. Matturro; L. Molina; A. Segura; S. Marqués; L. Yuste; E. Sevilla; Fernando Rojo; Angela Sherry; Obioma Mejeha; I.M. Head; L. Malmquist; J.H. Christensen; N. Kalogerakis; F. Aulenta. 2019. "Combining electrokinetic transport and bioremediation for enhanced removal of crude oil from contaminated marine sediments: Results of a long-term, mesocosm-scale experiment." Water Research 157, no. : 381-395.
BACKGROUND Pathogenic microorganisms at the effluents of treatment plants entail a potential risk for the public health. Enteric viruses such as adenoviruses (AdVs) and enteroviruses (EVs) are responsible for many waterborne diseases. Wastewater treatment methods eliminate successfully the load of indicators but other pathogens such as viruses have been detected in high concentrations at the effluents of the wastewater plants. In this perspective, two constructed wetlands (CWs) systems (S1 and S2) were employed and fed with primary wastewater. S1 consists of a free water surface wetland (FWS) and a horizontal subsurface flow wetland (HSSF) working in series, while S2 consists only of the HSSF. Also, both systems included a sand filter (SF) after the HSSF. RESULTS Results showed that these low cost systems are capable of eliminating effectively the bacterial indictors (total coliforms, Escherichia coli, Enterococci) achieving removal rates of almost 99% for S1 (3.2 – 4 Log units) and 89%‐98% for S2 (1.9 – 2.7 Log units). Regarding viruses, AdVs, EVs and phages were detected at all sampling points and during all seasons, and they were only partly removed in S1 and/or S2. For example, the virus load was decreased by 2.5 Log units for AdVs and 3.4 Log units for EVs in the case of S1, while the respective values were 4.3 and 1.9 Log units for S2. CONCLUSIONS Generally, CWs eliminated successfully the bacterial load, while the remaining virus load was significant, thus strengthening the argument that viruses could be a reliable indicator for fecal contamination. This article is protected by copyright. All rights reserved.
Andreas Kaliakatsos; Nicolas Kalogerakis; Thrassyvoulos Manios; Danae Venieri. Efficiency of two constructed wetland systems for wastewater treatment: removal of bacterial indicators and enteric viruses. Journal of Chemical Technology & Biotechnology 2019, 1 .
AMA StyleAndreas Kaliakatsos, Nicolas Kalogerakis, Thrassyvoulos Manios, Danae Venieri. Efficiency of two constructed wetland systems for wastewater treatment: removal of bacterial indicators and enteric viruses. Journal of Chemical Technology & Biotechnology. 2019; ():1.
Chicago/Turabian StyleAndreas Kaliakatsos; Nicolas Kalogerakis; Thrassyvoulos Manios; Danae Venieri. 2019. "Efficiency of two constructed wetland systems for wastewater treatment: removal of bacterial indicators and enteric viruses." Journal of Chemical Technology & Biotechnology , no. : 1.
A laboratory study was conducted to assess the mobility and mechanisms of chromium release from soils obtained from an area of wide spread geogenic contamination. The agricultural soil sample used in this study was taken from the Schimatari area in Asopos River basin in Greece. In order to refine the isolation of minerals contained in the soil, two types of separation analysis were conducted. First, a size fractionation with hydrocyclone and second, a weight fractionation with heavy liquids. The separated fractions were characterized using chemical, mineralogical and surface analysis. The results provided consistent evidence that the heavy fraction of the soil is related directly to the mobile fraction of chromium. At acidic pHs, the clay-sized fraction also plays an additional important role in the mobility of Cr, due to the fact that this fraction has high surface area and chromium reactivity index. In addition, pH-edge leaching studies showed a high correlation between Cr–Ni, Cr-Mn and Cr–Y released from the soil which also suggests that the mobility of chromium is controlled by chromite weathering which is the case observed in Asopos river basin.
Maria A. Lilli; Nikolaos P. Nikolaidis; George P. Karatzas; Nicolas Kalogerakis. Identifying the controlling mechanism of geogenic origin chromium release in soils. Journal of Hazardous Materials 2018, 366, 169 -176.
AMA StyleMaria A. Lilli, Nikolaos P. Nikolaidis, George P. Karatzas, Nicolas Kalogerakis. Identifying the controlling mechanism of geogenic origin chromium release in soils. Journal of Hazardous Materials. 2018; 366 ():169-176.
Chicago/Turabian StyleMaria A. Lilli; Nikolaos P. Nikolaidis; George P. Karatzas; Nicolas Kalogerakis. 2018. "Identifying the controlling mechanism of geogenic origin chromium release in soils." Journal of Hazardous Materials 366, no. : 169-176.
Plants and their associated bacteria play a crucial role in constructed wetlands. In this study, the impact of different levels of pollution and bioaugmentation with indigenous strains individually or in consortia was investigated on the composition of the endophytic microbial communities of Juncus acutus. Five treatments were examined and compared in where the wetland plant was exposed to increasing levels of metal pollution (Zn, Ni, Cd) and emerging pollutants (BPA, SMX, CIP), enriched with different combinations of single or mixed endophytic strains. High levels of mixed pollution had a negative effect on alpha diversity indices of the root communities; moreover, the diversity indices were negatively correlated with the increasing metal concentrations. It was demonstrated that the root communities were separated depending on the level of mixed pollution, while the family Sphingomonadaceae exhibited the higher relative abundance within the root endophytic communities from high and low polluted treatments. This study highlights the effects of pollution and inoculation on phytoremediation efficiency based on a better understanding of the plant microbiome community composition.
Evdokia Syranidou; Sofie Thijs; Marina Avramidou; Nele Weyens; Danae Venieri; Isabel Pintelon; Jaco Vangronsveld; Nicolas Kalogerakis. Responses of the Endophytic Bacterial Communities of Juncus acutus to Pollution With Metals, Emerging Organic Pollutants and to Bioaugmentation With Indigenous Strains. Frontiers in Plant Science 2018, 9, 1526 .
AMA StyleEvdokia Syranidou, Sofie Thijs, Marina Avramidou, Nele Weyens, Danae Venieri, Isabel Pintelon, Jaco Vangronsveld, Nicolas Kalogerakis. Responses of the Endophytic Bacterial Communities of Juncus acutus to Pollution With Metals, Emerging Organic Pollutants and to Bioaugmentation With Indigenous Strains. Frontiers in Plant Science. 2018; 9 ():1526.
Chicago/Turabian StyleEvdokia Syranidou; Sofie Thijs; Marina Avramidou; Nele Weyens; Danae Venieri; Isabel Pintelon; Jaco Vangronsveld; Nicolas Kalogerakis. 2018. "Responses of the Endophytic Bacterial Communities of Juncus acutus to Pollution With Metals, Emerging Organic Pollutants and to Bioaugmentation With Indigenous Strains." Frontiers in Plant Science 9, no. : 1526.
Plastic pollution in the marine environment is one of the foremost environmental problems of our time, as it affects wildlife and human health both directly and indirectly through the effects of contaminants carried by microplastics. This study investigates the temporal and spatial distribution of plastic pellets and fragments in sandy beaches along the coastline of Northern Crete, during 2013. Their densities varied throughout the year in each beach, with highest densities during the summer and towards the upper parts of the beaches. The concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) sorbed on microplastics sampled from nine sandy beaches of Northern Crete was quantified using Gas chromatography – Ion Trap Mass Spectrometry (GC-ITMS). PAHs concentrations ranged from non-detectable levels to 1592 ng/g and fluctuated between sampling periods. Based on the observed patterns of meso- and microplastics distribution, practical guidelines are proposed to minimize the entrance of microplastics into the seawater wherefrom they are exceptionally difficult to collect, if mitigation actions are to be applied.
Katerina Karkanorachaki; Sotiris Kiparissis; Georgina Calypso Kalogerakis; Evangelia Yiantzi; Elefteria Psillakis; Nicolas Kalogerakis. Plastic pellets, meso- and microplastics on the coastline of Northern Crete: Distribution and organic pollution. Marine Pollution Bulletin 2018, 133, 578 -589.
AMA StyleKaterina Karkanorachaki, Sotiris Kiparissis, Georgina Calypso Kalogerakis, Evangelia Yiantzi, Elefteria Psillakis, Nicolas Kalogerakis. Plastic pellets, meso- and microplastics on the coastline of Northern Crete: Distribution and organic pollution. Marine Pollution Bulletin. 2018; 133 ():578-589.
Chicago/Turabian StyleKaterina Karkanorachaki; Sotiris Kiparissis; Georgina Calypso Kalogerakis; Evangelia Yiantzi; Elefteria Psillakis; Nicolas Kalogerakis. 2018. "Plastic pellets, meso- and microplastics on the coastline of Northern Crete: Distribution and organic pollution." Marine Pollution Bulletin 133, no. : 578-589.
K. Chartzoulakis; Nicolas Kalogerakis; G. Psarras; F. Santori. Alternative technologies for olive mill wastewater management with emphasis on soil application. Acta Horticulturae 2018, 241 -250.
AMA StyleK. Chartzoulakis, Nicolas Kalogerakis, G. Psarras, F. Santori. Alternative technologies for olive mill wastewater management with emphasis on soil application. Acta Horticulturae. 2018; (1199):241-250.
Chicago/Turabian StyleK. Chartzoulakis; Nicolas Kalogerakis; G. Psarras; F. Santori. 2018. "Alternative technologies for olive mill wastewater management with emphasis on soil application." Acta Horticulturae , no. 1199: 241-250.
Mediterranean‐African countries (MACs) face a major water crisis. The annual renewable water resources are close to the 500 m3/capita threshold of absolute water scarcity, and water withdrawals exceed total renewable water resources by 30%. Such a low water availability curbs economic development in agriculture, which accounts for 86% of freshwater consumption. The analysis of the current situation of wastewater treatment, irrigation, and water management in MACs and of the research projects targeted to these countries indicates the need for 1) an enhanced capacity to analyze water stress, 2) the development of water management strategies capable of including wastewater reuse, and 3) development of locally adapted water treatment and irrigation technologies. This analysis shaped the MADFORWATER project (www.madforwater.eu), whose goal is to develop a set of integrated technological and management solutions to enhance wastewater treatment, wastewater reuse for irrigation, and water efficiency in agriculture in Egypt, Morocco, and Tunisia. MADFORWATER develops and adapts technologies for the production of irrigation‐quality water from drainage canals and municipal, agro‐industrial, and industrial wastewaters and technologies for water efficiency and reuse in agriculture, initially validated at laboratory scale, to 3 hydrological basins in the selected MACs. Selected technologies will be further adapted and validated in 4 demonstration plants of integrated wastewater treatment and reuse. Integrated strategies for wastewater treatment and reuse targeted to the selected basins are developed, and guidelines for the development of integrated water management strategies in other basins of the 3 target MACs will be produced. The social and technical suitability of the developed technologies and nontechnological tools in relation to the local context is evaluated with the participation of MAC stakeholders and partners. Guidelines on economic instruments and policies for the effective implementation of the proposed water management solutions in the target MACs will be developed. Integr Environ Assess Manag 2018;14:447–462. © 2018 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals, Inc. on behalf of Society of Environmental Toxicology & Chemistry (SETAC)
Dario Frascari; Giulio Zanaroli; Mohamed Abdel Motaleb; Giorgio Annen; Khaoula Belguith; Sara Borin; Redouane Choukr-Allah; Catherine Gibert; Atef Jaouani; Nicolas Kalogerakis; Fawzi Karajeh; Philippe A Ker Rault; Roula Khadra; Stathis Kyriacou; Wen-Tao Li; Bruno Molle; Marijn Mulder; Emmanuel Oertlé; Consuelo Varela Ortega. Integrated technological and management solutions for wastewater treatment and efficient agricultural reuse in Egypt, Morocco, and Tunisia. Integrated Environmental Assessment and Management 2018, 14, 447 -462.
AMA StyleDario Frascari, Giulio Zanaroli, Mohamed Abdel Motaleb, Giorgio Annen, Khaoula Belguith, Sara Borin, Redouane Choukr-Allah, Catherine Gibert, Atef Jaouani, Nicolas Kalogerakis, Fawzi Karajeh, Philippe A Ker Rault, Roula Khadra, Stathis Kyriacou, Wen-Tao Li, Bruno Molle, Marijn Mulder, Emmanuel Oertlé, Consuelo Varela Ortega. Integrated technological and management solutions for wastewater treatment and efficient agricultural reuse in Egypt, Morocco, and Tunisia. Integrated Environmental Assessment and Management. 2018; 14 (4):447-462.
Chicago/Turabian StyleDario Frascari; Giulio Zanaroli; Mohamed Abdel Motaleb; Giorgio Annen; Khaoula Belguith; Sara Borin; Redouane Choukr-Allah; Catherine Gibert; Atef Jaouani; Nicolas Kalogerakis; Fawzi Karajeh; Philippe A Ker Rault; Roula Khadra; Stathis Kyriacou; Wen-Tao Li; Bruno Molle; Marijn Mulder; Emmanuel Oertlé; Consuelo Varela Ortega. 2018. "Integrated technological and management solutions for wastewater treatment and efficient agricultural reuse in Egypt, Morocco, and Tunisia." Integrated Environmental Assessment and Management 14, no. 4: 447-462.
In the aftermath of oil spills in the sea, clouds of droplets drift into the seawater column and are carried away by sea currents. The fate of the drifting droplets is determined by natural attenuation processes, mainly dissolution into the seawater and biodegradation by oil-degrading microbial communities. Specifically, microbes have developed three fundamental strategies for accessing and assimilating oily substrates. Depending on their affinity for the oily phase and ability to proliferate in multicellular structures, microbes might either attach to the oil surface and directly uptake compounds from the oily phase, or grow suspended in the aqueous phase consuming solubilized oil, or form three-dimensional biofilms over the oil–water interface. In this work, a compound particle model that accounts for all three microbial strategies is developed for the biodegradation of solitary oil microdroplets moving through a water column. Under a set of educated hypotheses, the hydrodynamics and solute transport problems are amenable to analytical solutions and a closed-form correlation is established for the overall dissolution rate as a function of the Thiele modulus, the Biot number and other key parameters. Moreover, two coupled ordinary differential equations are formulated for the evolution of the particle size and used to investigate the impact of the dissolution and biodegradation processes on the droplet shrinking rate.
George E. Kapellos; Christakis A. Paraskeva; Nicolas Kalogerakis; Patrick S. Doyle. Theoretical Insight into the Biodegradation of Solitary Oil Microdroplets Moving through a Water Column. Bioengineering 2018, 5, 15 .
AMA StyleGeorge E. Kapellos, Christakis A. Paraskeva, Nicolas Kalogerakis, Patrick S. Doyle. Theoretical Insight into the Biodegradation of Solitary Oil Microdroplets Moving through a Water Column. Bioengineering. 2018; 5 (1):15.
Chicago/Turabian StyleGeorge E. Kapellos; Christakis A. Paraskeva; Nicolas Kalogerakis; Patrick S. Doyle. 2018. "Theoretical Insight into the Biodegradation of Solitary Oil Microdroplets Moving through a Water Column." Bioengineering 5, no. 1: 15.
Plastic debris represents a significant problem among the various problems facing the marine environment. In this work, we aim to explore the ability of two marine indigenous communities to degrade secondary microplastics. Polyethylene (low-density as well as high-density polyethylene) films were exposed to UV radiation until they were fragmented to microplastics under mild mechanical stress. Next, 50mg of sterile microplastics with size 2 mm–250 μm was added into sterile flasks and was incubated separately with these two pelagic microbiomes. A significant decrease in the weight of microplastics was determined along the experimental period, implying the potential ability of indigenous communities to in situ degrade secondary microplastics. Moreover, the protein content marginally decreased while carbohydrate content of both treatments increased at this time interval. Accordingly, the populations increased along experimental period.
Panagiota Tsiota; Katerina Karkanorachaki; Evdokia Syranidou; Martina Franchini; Nicolas Kalogerakis. Microbial Degradation of HDPE Secondary Microplastics: Preliminary Results. Springer Water 2017, 181 -188.
AMA StylePanagiota Tsiota, Katerina Karkanorachaki, Evdokia Syranidou, Martina Franchini, Nicolas Kalogerakis. Microbial Degradation of HDPE Secondary Microplastics: Preliminary Results. Springer Water. 2017; ():181-188.
Chicago/Turabian StylePanagiota Tsiota; Katerina Karkanorachaki; Evdokia Syranidou; Martina Franchini; Nicolas Kalogerakis. 2017. "Microbial Degradation of HDPE Secondary Microplastics: Preliminary Results." Springer Water , no. : 181-188.
A microcosm experiment was conducted at two phases in order to investigate the ability of indigenous consortia alone or bioaugmented to degrade weathered polystyrene (PS) films under simulated marine conditions. Viable populations were developed on PS surfaces in a time dependent way towards convergent biofilm communities, enriched with hydrocarbon and xenobiotics degradation genes. Members of Alphaproteobacteria and Gammaproteobacteria were highly enriched in the acclimated plastic associated assemblages while the abundance of plastic associated genera was significantly increased in the acclimated indigenous communities. Both tailored consortia efficiently reduced the weight of PS films. Concerning the molecular weight distribution, a decrease in the number-average molecular weight of films subjected to microbial treatment was observed. Moreover, alteration in the intensity of functional groups was noticed with Fourier transform infrared spectrophotometry (FTIR) along with signs of bio-erosion on the PS surface. The results suggest that acclimated marine populations are capable of degrading weathered PS pieces.
Evdokia Syranidou; Katerina Karkanorachaki; Filippo Amorotti; Martina Franchini; Eftychia Repouskou; Maria Kaliva; Maria Vamvakaki; Boris Kolvenbach; Fabio Fava; Philippe F.-X. Corvini; Nicolas Kalogerakis. Biodegradation of weathered polystyrene films in seawater microcosms. Scientific Reports 2017, 7, 1 -12.
AMA StyleEvdokia Syranidou, Katerina Karkanorachaki, Filippo Amorotti, Martina Franchini, Eftychia Repouskou, Maria Kaliva, Maria Vamvakaki, Boris Kolvenbach, Fabio Fava, Philippe F.-X. Corvini, Nicolas Kalogerakis. Biodegradation of weathered polystyrene films in seawater microcosms. Scientific Reports. 2017; 7 (1):1-12.
Chicago/Turabian StyleEvdokia Syranidou; Katerina Karkanorachaki; Filippo Amorotti; Martina Franchini; Eftychia Repouskou; Maria Kaliva; Maria Vamvakaki; Boris Kolvenbach; Fabio Fava; Philippe F.-X. Corvini; Nicolas Kalogerakis. 2017. "Biodegradation of weathered polystyrene films in seawater microcosms." Scientific Reports 7, no. 1: 1-12.