The authors present a case of a 40-year-old man who intentionally stabbed himself several times in the trachea and larynx during a suicide attempt, and also inflicted other penetrating injuries of the stomach and liver upon himself. The preoperative examination using fiber-optic tracheoscopy and CT revealed only transection of the ligamentum cricothyroideum; the remaining two defects were discovered later, during the surgical revision. All three injuries were successfully treated with sutures, in one case using the transtracheal approach.
The article deals with mercury emissions representing a significant environmental risk. The introduction outlines the history of the use of this element and its release to all environmental compartments, such as lithosphere, hydrosphere and atmosphere. The actual situation in distribution of mercury emissions from the most important industrial sectors is described in more detail. A corresponding space is also reserved to the description of health risks associated with short-term and chronic exposure of human and animal organisms to this toxic metal. Elemental mercury, its oxidized form of Hg2+ bound in various compounds and Hg adsorbed onto solid particles are discussed separately. This is because each of these forms represents a different level of risk, transforms and binds differently in the human body, etc. As there is currently an intensive debate in the Czech Republic on reducing Hg emissions from the power industry, this issue is also mentioned in the paper presented here. Within the relevant chapter the initial phase of the research on the use of fly ashes transformed into zeolites for Hg adsorption from gaseous mixtures is sketched. Testing of the conditions under which domestic fly ashes, generated by the combustion of brown coal and biomass, can be converted to the efficient adsorbents has been started. In the published studies, the main attention is paid to the largest possible specific surface and nanopore percentage. For this reason, the research has begun to address the conditions under which the above-mentioned product properties are achieved. A method, in which the intermediate was exposed to 30% HCl after hydrothermal treatment of the appropriate raw material with NaOH, gave a structure having the BET surface significantly exceeding 350 m2g-1. Measurements of the sorption properties of the product using gases containing defined Hg concentrations will follow in the next phase of the research.
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