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The thermal desorption of mercury from the solid phase coupled with atomic absorption spectroscopy (AAS) is useful and simple method of mercury speciation analysis of the environmental samples. The present work is focused on the mercury desorption use for soil, sediments and tailings study. The extensive experimental material of many authors was summarized in this work with regard to a critical confrontation of approaches used in data interpretation. The main emphasis was put on the most frequently observed forms as [Hg.sup.0], [Hg.sup.2+] bound to mineral or organic surfaces, [Hg.sup.2+] bound to the most common ligands and HgS. A comprehensive conception of the usage possibilities of this method as suitable analytical tool for speciation analysis was the main aim. This work includes not only the preparation of calibration materials and the description of their desorption behaviour but also summarizes the interpretations of mercury release curves of real samples and becomes an effective tool for their evaluation. Keywords: mercury, thermal desorption, soil, tailing, sediment DOI: 10.1134/S1061934814120028, Mercury is an important circulating pollutant and its monitoring stands in focus now. Organic mercury species could be considered as the most dangerous compounds of toxic metal which appear in [...]

A pulsed laser photolysis-pulsed laser induced fluorescence technique is employed to study the recombination of mercury and chlorine atoms, Hg+Cl+M->HgCl+M, and the self-reaction of chlorine atoms, Cl+Cl+M->Cl2+M. Rate coefficients are determined as a function of pressure and temperature in N2 buffer gas and as a function of pressure in He buffer gas at room temperature.

A study is conducted on a 160-nm-thick (Hg0.9Re0.1)Ba2CaCu2Oy [(Hg,Re0-1212] epitaxial thin films that were fabricated on 2degree-18.4degree -tilt SrTiO3 vicinal substrates with thin buffer layers. The studies indicate that the vicinal films had superior crystallinity and superconducting properties comparable to those for conventional films with no tilt.

IR and UV-vis spectroscopic measurements are used to chart the thermal and photolytic reactions occurring in HCI-doped Ar matrixes containing Zn, Cd, or Hg atoms (M). The properties of HMCI are compared with those of other group 12 metal hydrides, and the mechanism of insertion is also discussed.

Annealing leads to HgH2 dimer and trimer, and warming above 7 K allows the hydrogen matrix to sublime and solid HgH2 to form. This covalent molecular solid is characterized by strong i nfrar ed absorptions.

The preparation and crystal structures of two modifications of Hg2MoO4 are reported. At high temperature Hg2MoO4 (the beta-modification) crystallizes with a structure, where MoO4 tetrahedra are linked through Hg2 dumb-bells, thus forming infinite zig-zag chains and at low temperature Hg2MoO4 (the alpha-modification) contains MoO6 octahedra, which are linked via common edges to form zigzag chains, which are further linked via Hg2 dumb-bells, thus forming puckered two-dimensionally infinite sheets.

An infrared radiation thermometer based on a mercury cadmium telluride camera was used to obtain in situ spatial and temporal temperature measurements of pristine fused silica surfaces heated with a 10.6 [mu]m C[O.sub.2] laser. The results indicated that the thermal transport in fused silica up to 2800 K, over a range of conditions could be satisfactorily described by a linear diffusive heat equation assuming constant thermal properties.

A novel and practical system is described for colorimetric detection of mercury at room temperature. This system has used a combination of oligonucleotides and nanoparticles (NPs) at low concentrations for detecting [H.sup.2+] in aqueous solutions and in the presence of an excess of other metal ions.

The theoretical background for the interaction of intense laser radiation with mercury cadmium telluride (MCT) material is presented. The results provide insight into the changes in electron- and light hole masses and the separation between the light- and heavy hole bands which strongly influence the intervalence band absorption.

The study explains the synthesis, as well as the reactivity of the [[[(silox).sub.2]MO=NR].sub.2]Hg (R = [super t]Bu, [super t]amyl; silox = O[Si.sup.t][Bu.sub.3]) compounds. These complexes are found to exhibit excellent thermal stability.

The synthesis and characterization of two sulfur-containing hybrid calix[4]pyrrole derivatives are presented. The results have shown that replacement of one or more pyrrole units by thiophene rings in calix[4]pyrrole has tuned the discrimination ability of the ligands between anions and has enabled the produced hybrid calixpyrroles to bind selectively with Hg(II) in acetonitrile.