Browsing Τμήμα Χημείας / Department of Chemistry by Title
Now showing items 41-60 of 1296
-
Article
Actinide Ion (Americium-241 and Uranium-232) Interaction with Hybrid Silica–Hyperbranched Poly(ethylene imine) Nanoparticles and Xerogels
(MDPI, 2023)The binding of actinide ions (Am(III) and U(VI)) in aqueous solutions by hybrid silica–hyperbranched poly(ethylene imine) nanoparticles (NPs) and xerogels (XGs) has been studied by means of batch experiments at different ...
-
Article
Activated biochar derived from cactus fibres - Preparation, characterization and application on Cu(II) removal from aqueous solutions
(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
The Active Site Structure of Heme a3 3+-C≡N-CuB2+ of Cytochrome aa 3 Oxidase as Revealed from Resonance Raman Scattering
(2003)Resonance Raman and FTIR spectroscopies have been employed to investigate the structure of the heme a3-C≡N-CuB complex of oxidized cytochrome aa3 oxidase. The characterization of this complex is essential since a central ...
-
Article
Addition of Electron-Rich Aromatics to Azafullerenium Carbocation. A Stepwise Electrophilic Substitution Mechanism
(2003)(Matrix presented) The reaction between the C59N+ carbocation and the electron-rich aromatic compounds toluene and anisole has been mechanistically studied. The measured intermolecular kinetic isotope effects are consistent ...
-
Article
Addition of tetraethylthiuram disulfide to antimony(III) iodide
(2016)Three new antimony(III) iodide complexes with the N,N-diethylcarbamodithioic acid of formulae {[(SbI(Et2DTC)2)(I2)]n} (1), {[(Sb(Et2DTC)2)4 (SbI6) (I3)]n} (2) and {[SbI(Et2DTC)2]2} (3), (Et2DTCH: N,N-diethylcarbamodithioic ...
-
Article
Adsorption of boron on iron-oxide in aqueous solutions
(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
(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
(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 nitrogen and water vapour by activated Kevlar® chars
(1993)Fibrous activated carbons were prepared from Kevlar® (i.e. poly (p-phenylene terephthalamide), in the form of a commercially available woven textile. The cloth was carbonised in nitrogen and activated in either steam or ...
-
Article
Adsorption of nitrogen and water vapour by activated Nomex® chars
(1995)Fibrous activated carbons were prepared from Nomex® poly(m-phenylene isophthalamide), in the form of a commercially available woven textile. After carbonisation in nitrogen and activation in either carbon dioxide or steam ...
-
Article
Adsorption of Reactive Red 120 Dye by Polyamide Nylon 6 Microplastics: Isotherm, Kinetic, and Thermodynamic Analysis
(MDPI, 2023)In this work, we investigated the effect of various adsorption parameters (solution pH, temperature, contact time, and the presence of phosphate and nitrate ions) on the adsorption of Reactive Red 120 (RR120) dye by Polyamide ...
-
Article
Adsorption of trivalent lanthanides by marine sediments
(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
The adsorption of water vapour by microporous solids
(1991)The adsorption of water vapour has been studied with a range of microporous carbons, zeolites and aluminophosphates in order to elucidate the relative influence of surface chemistry, pore size and pore shape upon the form ...
-
Article
The adsorption of water vapour by VPI-5, a large pore molecular sieve
(1991)The framework of VPI-5, the first molecular sieve having uniform pores larger than 1 nm diameter, is modified during removal of the zeolitic water
-
Article
Adsorption study by transient tracing methods. theory and modeling
(1993)The advantages of transient tracing methods (TTM) in studying heterogeneous catalytic systems have been described by many authors. This chapter presents a new application of TTM for studying adsorption. The basic idea of ...
-
Article
Adsorptive properties and stability of VPI-5, a large-pore molecular sieve
(1992)The unusual adsorptive properties and the reported instability of VPI-5 have been investigated in some detail. The VPI-5 framework was found to undergo an irreversible but incomplete phase transformation to AlPO4-8 during ...
-
Article
Adsorptive Properties of Microporous Zro2 Gels
(1993)Nitrogen adsorption studies were carried out on zirconia gels prepared through the agency of ammonium carbonate to zirconyl chloride solutions. The effect of heat treatment and cation uptake on the textural characteristics ...
-
Article
Adsorptive removal of U(VI) and Th(IV) from aqueous solutions using polymer-based electrospun PEO/PLLA fibrous membranes
(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
Advances in chemical sensing technologies for VOCs in breath for security/threat assessment, illicit drug detection, and human trafficking activity
(2018)On-site chemical sensing of compounds associated with security and terrorist attacks is of worldwide interest. Other related bio-monitoring topics include identification of individuals posing a threat from illicit drugs, ...
-
Article
Aerial Oxidation of a VIV-Iminopyridine Hydroquinonate Complex: A Trap for the VIV-Semiquinonate Radical Intermediate
(2015)The reaction of 2,5-bis[N,N′-bis(2-pyridyl-aminomethyl)aminomethyl]-p-hydroquinone (H2bpymah) with VO2+ salts in acetonitrile or water at a low pH (2.2-3.5) results in the isolation of [{VIV(O)(Cl)}2(μ-bpymah)], the ...