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11.
Banti Angeliki Grammenos Orestis Kokkinos Εvgenios Touni Aikaterini Sotiropoulos Sotiris Zouboulis Anastasios 《Environmental science and pollution research international》2023,30(4):8722-8731
Environmental Science and Pollution Research - Electrochemical oxidation of trivalent chromium from leather tanning mud waste leachates (containing ca 6 g.L?1 Cr(III)) to its... 相似文献
12.
Aikaterini Ioannis Vavouraki Evangelos Michael Angelis Michael Kornaros 《Waste management (New York, N.Y.)》2013,33(3):740-745
Municipal Solid Wastes (MSWs) in Greece consist mainly of fermentable organic material such as food scraps (~50%) and paper residuals (~20%). The aim of this work was to study the thermo-chemical pretreatment of the kitchen waste (KW) fraction of MSW focusing on biotechnological exploitation of pretreated wastes for biofuel production. A representative sample of municipal food residues was derived by combining weighted amounts of each individual type of residue recognized in daily samples obtained from the University of Patras’ students restaurant located at the Students Residence Hall (Greece). Chemical pretreatment experiments of the representative KW sample were performed using several types of chemical solutions (i.e. H2SO4, HCl, NaOH, H2SO3) of different solute concentration (0.7%, 1.5%, 3%) at three temperatures (50, 75, 120 °C) and a range of residence times (30–120 min). Optimized results proved that chemical pretreatment of KW, using either 1.12% HCl for 94 min or 1.17% HCl for 86 min (at 100 °C), increased soluble sugars concentration by 120% compared to untreated KW. The increase of soluble sugars was mainly attributed to the mono-sugars glucose and fructose. 相似文献
13.
Aikaterini Sakellari Sotirios Karavoltsos Dimitrios Theodorou Manos Dassenakis Michael Scoullos 《Environmental monitoring and assessment》2013,185(4):3383-3395
The concentrations of Cd, Cu and Zn in both the whole soft tissue and separate organs (gills, mantle, muscle and digestive gland) of wild bivalves (Mytilus galloprovincialis, Pinctada radiata, Venus verrucosa and Callista chione) from three different coastal microenvironments of Greece were monitored from 2003 to 2004. In parallel, by employing appropriate analytical protocols for metal partitioning, the labile fraction of the metals was determined in the dissolved phase, suspended particulate matter and sediments. Differences in the metal levels were detected both among the study areas as well as among the bivalves examined. Significant bioaccumulation was demonstrated regarding Zn in M. galloprovincialis specimens from the highly industrialized Gulf of Elefsis and Cd in P. radiata and V. verrucosa from the Maliakos Gulf, which is influenced by extended agricultural activity occurring at the neighbouring area and a river outflow. Data of the metal levels in the various environmental phases were correlated with their concentrations in bivalves’ tissues. The clear relationships obtained in many cases among the labile metal concentrations and the bioaccumulated concentrations in bivalves point out that the labile fraction of a metal is the most bioavailable. The lack of positive correlation for C. chione confirms the occurrence of effective mechanisms of internal regulation of metal concentrations. 相似文献
14.
Aikaterini K. Boulamanti Constantine J. Philippopoulos 《Atmospheric environment (Oxford, England : 1994)》2009,43(20):3168-3174
The gas-phase photocatalytic oxidation (PCO) of pentane, i-pentane, hexane, i-hexane and heptane over illuminated titanium at ambient temperatures was studied in a continuous stirring-tank reactor and for different values of VOC feed concentrations and relative humidity levels. Conversions achieved were over 90% for residence times from 50 to 85 s and the only products formed were CO2 and H2O, while no catalyst deactivation was observed. The obtained results indicate that the molecular and stereochemical structures of the compounds play an important role in the reaction, as the rate was increasing with higher molecular weight, and the presence of a tertiary carbon atom enhanced the reactivity. It was also observed that the increase of the carbon chain by a methyl group had the same influence in the reaction rate in the case of both pentane and i-pentane, while the ratio of the rates for the linear and branched structure was the same for both C5 and C6 isomers. The presence of water in the system had an inhibitory effect in all cases. The PCO kinetics was well fit by a Langmuir–Hinshelwood model, modified so as to take into consideration the influence of water vapour. The rate constants ranged from 1.87 × 10?7 mol m?2 s?1 for pentane to 3.03 × 10?7 mol m?2 s?1 for heptane, and the VOC adsorption constants from 1.14 104 to 2.83 104 m3 mol?1, while the water adsorption constant was 11.2 m3 mol?1. 相似文献
15.
Valsamatzi-Panagiotou Aikaterini Penchovsky Robert 《Environmental Chemistry Letters》2022,20(3):1603-1610
Environmental Chemistry Letters - The coronavirus 2019 pandemic, induced by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has strongly altered healthcare systems and... 相似文献