Browsing by Author "Pashalidis, Ioannis"

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 ...