Browsing Τμήμα Χημείας / Department of Chemistry by Title
Now showing items 51-70 of 1299
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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 ...
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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 ...
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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 ...
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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
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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 ...
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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Conference Object
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Article
Agricultural biomass/waste as adsorbents for toxic metal decontamination of aqueous solutions
(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 ...
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Article
Alcoholysis/hydrolysis of 1,1′-carbonyldiimidazole as a means of preparing unprecedented, imidazole-containing one-dimensional coordination polymers of copper(II)
(2009)The use of 1,1′-carbonyldiimidazole, (im)2CO, for the synthesis of imidazolate (im-) and/or imidazole (Him)-containing copper(II) coordination polymers is described. The [Cu2(O 2CMe)4(H2O)2]/(im)2CO reaction system in EtOH ...
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Article
Aldoxime dehydratase: Probing the heme environment involved in the synthesis of the carbon-nitrogen triple bond
(2011)Fourier transform infrared (FTIR) spectra, "light" minus "dark" difference FTIR spectra, and time-resolved step-scan (TRS 2) FTIR spectra are reported for carbonmonoxy aldoxime dehydratase. Two C-O modes of heme at 1945 ...
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Article
Alpha radiometry of uranium in surface and ground waters by liquid scintillation counting after separation of the radionuclide by cation exchange
(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 ...
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Article
Alpha spectroscopic analysis of actinides (Th, U and Pu) after separation from aqueous solutions by cation-exchange and liquid extraction
(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 ...
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Article
Alpha-radiometry of seawater by liquid scintillation counting
(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 ...
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Article
Alpha-spectroscopic analysis of uranium in ground- and seawater samples after EDTA-masking of interfering cations
(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 ...
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Article
Alternating amphiphilic multiblock copolymers: Controlled synthesis via RAFT polymerization and aqueous solution characterization
(2010)Four linear amphiphilic multiblock copolymers based on 2-(dimethylamino) ethyl methacrylate (DMAEMA, hydrophilic) and methyl methacrylate (MMA, hydrophobic), bearing from two to five blocks, were synthesized using reversible ...
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Article
Americium and samarium determination in aqueous solutions after separation by cation-exchange
(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 ...