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Browsing by Author "Pashalidis, Ioannis"

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    • Article  

      Acid mine drainage treatment with dunite 

      Demetriou, Antri; Lysandrou, Michaela; Charalambides, Antonios; Pashalidis, Ioannis (2010)
      This paper reports the efficiency of dunite as an alternative alkalinity generating material and adsorbent for the passive treatment of acid mine drainage (AMD). The acid neutralization capacity (ANC) of dunite has been ...

    • Article  

      Activated biochar derived from cactus fibres - Preparation, characterization and application on Cu(II) removal from aqueous solutions 

      Hadjittofi, Loukia; Prodromou, Melpomeni; Pashalidis, Ioannis (2014)
      The adsorption efficiency of activated biochar prepared from cactus fibres regarding the removal of Cu(II) from aqueous solutions has been investigated as a function of various physicochemical parameters (e.g. pH, initial ...

    • Article  

      Adsorption of boron on iron-oxide in aqueous solutions 

      Demetriou, Antri; Pashalidis, Ioannis (2012)
      The adsorption of boron on iron-oxide (FeO(OH)) has been investigated in aqueous solutions as a function of pH, ionic strength, temperature, boron concentration and amount of the adsorbent. Analysis of the experimental ...

    • Article  

      Adsorption of hexavalent chromium on dunite 

      Demetriou, Antri; Pashalidis, Ioannis (2011)
      The paper presents and discusses the effect of various physicochemical parameters (e.g. pH, ionic strength, Cr(VI) initial concentration, amount of the adsorbent, temperature and contact time between metal ion and adsorbent) ...

    • Article  

      Adsorption of hexavalent uranium on biomass by-product 

      Konstantinou, M.; Pashalidis, Ioannis (2007)
      The effectiveness of the uranium removal by olive cake from aqueous solutions has been demonstrated in batch type experiments under normal atmospheric conditions. The adsorption capacity has been evaluated by using both ...

    • Article  

      Adsorption of trivalent lanthanides by marine sediments 

      Liatsou, Ioanna; Efstathiou, Maria; Pashalidis, Ioannis (2015)
      The interaction of Eu(III) with two different types of marine sediments has been investigated as a function of various parameters (e.g. pH, [Eu(III)]o, I, humic acid) to evaluate their effect on the Eu(III) adsorption. The ...

    • Article  

      Adsorptive removal of U(VI) and Th(IV) from aqueous solutions using polymer-based electrospun PEO/PLLA fibrous membranes 

      Savva, Ioanna; Efstathiou, Maria; Krasia‐Christoforou, Theodora; Pashalidis, Ioannis (2013)
      Fibrous membranes based on poly(ethylene oxide) and poly(l-lactide) fabricated by electrospinning were evaluated for the first time as substrates for the adsorption of tetravalent thorium (Th(IV)) and hexavalent uranium ...

    • Article  

      Agricultural biomass/waste as adsorbents for toxic metal decontamination of aqueous solutions 

      Anastopoulos, Ioannis; Pashalidis, Ioannis; Hosseini-Bandegharaei, Ahmad; Giannakoudakis, Dimitrios A.; Robalds, Artis; Usman, Muhammad; Escudero, Leticia Belén; Zhou, Yaoyu; Colmenares, Juan Carlos; Núñez-Delgado, Avelino; Lima, Éder Claudio (2019)
      Toxic metals can be present in the environment, causing negative effects on the ecosystem and human health. Although several technologies have been used for decontamination purposes, biosorption is an environmentally ...

    • Article  

      Alpha radiometry of uranium in surface and ground waters by liquid scintillation counting after separation of the radionuclide by cation exchange 

      Antoniou, Stella; Tsiaili, A.; Pashalidis, Ioannis (2008)
      The alpha radioactivity of surface and ground water samples has been determined by liquid scintillation counting (LSC) after chemical preparation of the samples by cation exchange using the Chelex 100 resin. The method ...

    • Article  

      Alpha spectroscopic analysis of actinides (Th, U and Pu) after separation from aqueous solutions by cation-exchange and liquid extraction 

      Kiliari, T.; Pashalidis, Ioannis (2010)
      The radioactivity concentration of 236Pu, 232U and 228Th in aqueous samples has been determined by means of alpha spectroscopy after chemical separation and pre-concentration of the radionuclides by cation exchange and ...

    • Article  

      Alpha-radiometry of seawater by liquid scintillation counting 

      Antoniou, Stella; Costa, Constantinos; Pashalidis, Ioannis (2006)
      Liquid scintillation counting of the alpha-radionuclides after pre-concentration by cation-exchange represents a simple and robust method for the determination of total alpha-radioactivity in seawater. The total efficiency ...

    • Article  

      Alpha-spectroscopic analysis of uranium in ground- and seawater samples after EDTA-masking of interfering cations 

      Paschalidou, Polyxeni; Pashalidis, Ioannis (2019)
      The effect of EDTA-masking on the alpha-spectral characteristics corresponding to uranium analysis in ground- and seawater samples after cation-exchange and electrodeposition is systematically investigated. Addition of ...

    • Article  

      Americium and samarium determination in aqueous solutions after separation by cation-exchange 

      Kiliari, T.; Pashalidis, Ioannis (2014)
      The concentration of trivalent americium and samarium in aqueous samples has been determined by means of alpha-radiometry and UV-Vis photometry, respectively, after chemical separation and pre-concentration of the elements ...

    • Article  

      Application of different types of resins in the radiometric determination of uranium in waters 

      Kyriakou, M.; Pashalidis, Ioannis (2011)
      The aim of this study is to compare different resins regarding their separation and pre-concentration efficiency for uranium from aqueous solutions and its subsequent radiometric determination by liquid scintillation ...

    • Article  

      Aufbau von Telluroacrylamid-Komplexen aus Pentacarbonyl(diphenyltelluroketon)wolfram und Inaminen 

      Fischer, H.; Pashalidis, Ioannis (1988)
      Pentacarbonyl(diphenyltelluroketone)tungsten, (CO)5W(TeCPh2), reacts with 1-diethylaminoprop-1-yne and bis(diethylamino)acetylene, RCCNEt2, by [2 + 2]- cycloaddition and electrocyclic ring-opening to give the new ...

    • Article  

      Boron adsorption on alumina (Al2O3) and magnesia (MgO) in aqueous solutions: A comparative study 

      Konstantinou, M.; Kasseta, G.; Pashalidis, Ioannis (2006)
      The adsorption of boron on alumina (Al2O3) and magnesia (MgO) has been investigated in aqueous solutions as a function of pH, boron concentration, amount of adsorbent, ionic strength and temperature. Analysis of the ...

    • Article  

      Boron in groundwaters of Nicosia (Cyprus) and its treatment by reverse osmosis 

      Georghiou, G.; Pashalidis, Ioannis (2007)
      Boron levels in groundwaters of Nicosia have been determined, compared to previous concentration data and correlated to the concentration of other chemical species contained in the groundwaters under investigation. According ...

    • Article  

      The Chemistry of Pu in Concentrated Aqueous NaCl Solution: Effects of Alpha Self-Radiolysis and the Interaction between Hypochlorite and Dioxoplutonium(VI) [1] 

      Pashalidis, Ioannis; Lierse, C.; Sullivan, J. C.; Kim, J. I. (1992)
      The reactions between dioxoplutonium(VI) and hypochlorite in aqueous solution produce the species Pu02(0H)(C10) and Pu02(C10)2. The results of spectrophotometric observations are presented and the data used to calculate ...

    • Article  

      A comparative study of the adsorption of uranium on commercial and natural (Cypriot) sea sand samples 

      Efstathiou, Maria; Pashalidis, Ioannis (2013)
      The adsorption of hexavalent uranium on two different types of sea sand [e.g. a local, Cypriot (N-SS) and a commercially available marine sediment (C-SS)] has been investigated as a function of pH, initial metal concentration, ...

    • Article  

      A comparative study on the sorption of tri- and hexavalent actinides on sea sediments 

      Efstathiou, Maria; Pashalidis, Ioannis (2017)
      The interaction of tri- and hexavalent actinides with local, Cypriot marine sediments has been investigated as a function of initial metal concentration, before and after “coating” with natural organic matter. Evaluation ...

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