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This paper presents the results of leaching of Co, Cd, Cu, Mn, Ni and Zn ions from solid wastes in mine waters of various salinity. Determinations of the content of examined elements in mine waters and in solutions from leaching of solid mine wastes were carried out by atomic absorption spectroscopy, after preliminary extraction of elements in the form of pyrrolidinedithiocarbamates. To obtain complete characteristic of examined mine waters and solutions from leaching, standard analyses, commonly used for water and wastes, were done.
The aim of the present work was to evaluate the mercury content in hair of inhabitants of Wrocław, in southwestern Poland. On the basis of a questionnaire and analysis of hair by atomic absorption spectroscopy, it was possible to indicate the sources of mercury exposure. The mean mercury level in hair of the whole population (n=321) was 0.203±0.181 mg·kg⁻¹. The content of mercury in hair of subjects who consumed fish exceeded the upper limit of reference value, which was 0.397 mg·kg⁻¹. Subjects who declared consumption of fish, honey, and mouldy cheese, contained statistically more mercury: 60.5%, 35.4%, and 37.8%, respectively, than those who did not eat these types of food. It was noticed that there was no effect from the place of residence, the presence of pollution emitters, gender, age, weight, height, presence of amalgam fillings, hair dyeing, and smoking cigarettes on mercury content in hair.
The concentrations of lead, cadmium, zinc, cuprum and chrominum in human milk were determined using GF AAS. The samples originated from women living in the Upper Silesian Industrial District (Poland). The mean concentration of lead was about 50 ng/g, cadmium 16 ng/g, zinc 50 μg/g, chromium 45.5 ng/g, and copper 1.1 μg/g. The mineralization of the samples was carried out both by means of concentrated mineral acids (HN03; HN03+HCI04 and HN03 + H202) under normal pressure for 12 hours, and mineralization with the microwave digestion system (which is most recommended).
Lead, cadmium, zinc, manganese, chromium, cobalt, copper, and molybdenum concentrations were measured in 50 samples of placenta tissues. The samples came from Tychy in the Upper Silesian Industrial District (Poland), where the population is exposed to enormously increased levels of heavy metals. GFAAS technique was used. Various methods of ashing samples were examined. Wet ashing under pressure in the teflon bomb at 110°C with HNO, and wet ashing under normal pressure with HN03 + H202 are considered to be the best ones. Mean concentrations of metals in the placenta were determined. Coexistence of increased levels of various metals was checked. Concentration of heavy metals in the samples coming from the polluted industrial territory is higher than in those collected in cleaner regions.
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