ObjectivesThe purpose of this study was to develop an adhesive resin with incorporation of niobium pentoxide and evaluate its properties.

The separation of tantalum and niobium compounds has been of interest for many years, with few new developments. Classically separation is achieved by liquid–liquid extraction and most research focuses on optimising this process. A separation method that bypasses the need for liquid–liquid ext...

A set of analytical data from the Espadán–Calderona Triassic Domain aquifers was processed using hierarchical agglomerative cluster analysis (HCA) and principal component analysis (PCA), to achieve a quantitative and independent approach to investigate the characteristics of groundwater compos...

Publisher SummaryThis chapter discusses about the determination of thiocyanate and thiosulfate. Several methods are used for the analytical determination of inorganic thiocyanate. These include procedures based on the formation of colored complexes, either with ferric ions or with cupric ions an...

The wet oxidation of thiocyanate has been investigated in a semi-batch reactor at temperatures between 423 and 473 K and pressures between 6.1 × 103 and 1.0 × 104 kPa in the presence of copper(II) sulphate as catalyst. The effects of copper concentration, initial thiocyanate concentration, pre...

The stability of pyrite, chalcopyrite, chalcocite, covellite, bornite and enargite at pH 2 in the absence and presence of thiocyanate has been determined by linear sweep voltammetry and chronoamperometry under conditions pertaining to the thiocyanate leaching of gold (pH 2 and 602–702 mV vs. SH...

Thiocyanate has been identified and studied as a promising alternative lixiviant for gold in acidic solutions. Eh–pH and ion species distribution diagrams for SCN–H2O, Au–SCN–H2O, Ag–SCN–H2O, Cu–SCN–H2O, and Fe–SCN–H2O systems were constructed to predict the behavior of each metal ion ...

Acid thiocyanate leaching of gold was investigated in the presence of ferric sulfate as an oxidant. According to leaching kinetic studies the initial rate of gold leaching is slow, and not significantly dependent on thiocyanate (0.05–0.2 M) and ferric (0.1–1.0 g/L) concentrations. Ferrous and ...

Significant development in the industrial technologies and applications based on the use of cyanide derivatives has also led to significant environmental problems critically needing research in developing new technologies for effluent treatment. Present study investigates the use of novel treatm...

This study investigates, for the first time ever, the performance of iron(II) as homogeneous catalyst during the catalytic wet oxidation of thiocyanate. The results revealed the suitability of iron salts as cheap, non-toxic catalysts for the homogeneous wet oxidation of thiocyanate in acidic med...

The effects of metal ions, minerals, temperature, thiocyanate concentration, activated carbon, and pH on the rate of thiocyanate oxidation were determined. The rate of ferrous ion generation from the redox reaction between thiocyanate and ferric ion was found to be significant at 50 °C. The rea...

We report in this paper vibrational spectra (i) for selenium tetrafluoride in the vapour and solid phases, and isolated in inert-gas matrices, and (ii) for tellurium tetrafluoride in both the solid and matrix-isolated condition. The discrete SeF4 and TeF4 molecules have C2v symmetry, on the basi...

The article discusses estimates of the stability and homogeneity in Be-Mg-Al-silicate glass produced by the authors and its applicability as a laboratory reference sample for X-ray electron probe microanalysis (EPMA) of Be-bearing silicate matters: crystals and quenching melt (glasses), silicate...

Be-Na-(Li)-Si oxide glasses containing up to 15 mol% of BeO were prepared. Their structure was characterized by X-ray powder diffraction and Raman as well as infrared spectroscopic techniques, while their chemical compositions were examined by Inductively Coupled Plasma Optical Emission Spectrom...

In this paper Raman spectra were obtained for a series of zeolites (thomsonite, stilbite, natrolite) and beryllium containing silicates (beryl, chrysoberyl, euclase, phenacite, bavenite, milarite) using a portable Raman specrometer with a 785 nm laser excitation to show the possibility to apply ...

The growth characteristics and electrical properties of thin films of crystalline beryllium oxide (BeO) on Si (100) substrates grown using electron beam evaporation (EBE) are described. To expand the commercial viability of BeO, a combination of EBE with thermal oxidation was optimized to facili...

Describing the crystal structure, packing, FT–IR, UV–Vis and NMR spectra and thermal properties of new polydentate O-ligand based on aryl-β-diketone moieties connected by ethylene glycol spacer is the subject of this article. The results of IR, UV–Vis and 1H NMR spectroscopy as well X-ray cr...

In this study, bornyl- and cytisine-based cyanopyrrolidines as potent dipeptidyl peptidase-IV (DPP-IV) inhibitors were synthesised. The in vitro inhibiting activities of bornyl- and cytisine derivatives towards DPP-IV were evaluated. Bornyl-based cyanopyrrolidines were shown to have moderate inh...

Cytisine, an α4β2 nicotinic receptor partial agonist, is a plant alkaloid widely used as a smoking cessation agent. Despite long history of use, knowledge on pharmacokinetics of cytisine still demands an extension. This work is aimed at theoretical determination of physicochemical parameters t...

Based on molecular design, a cytisine surface-imprinted material was prepared using the new surface-imprinting technique of “pre-graft polymerizing and post-imprinting”. The graft-polymerization of glycidyl methacrylate (GMA) on the surfaces of micron-sized silica gel particles was first perfo...