[Evaluation of workplace air pollution with fluor compounds and their contents of biologic media in aluminium production workers].

The authors estimated fluorine compounds content of workplace air in electrolysis workshops of aluminium production, for various electrolysis technologies. The data cover results of physical and chemical analysis and material constitution of produced toxic dust complexes, urinary excretion levels of fluorine ion and fluorides accumulation in hair of aluminium production workers.

[REGIONAL INDICES OF TRACE ELEMENT LEVELS IN HAIR IN CHLILDREN OF THE POPULATION OF THE IRKUTSK REGION].

747 hair samples of the pre-school aged children from different regions of the Irkutsk Region have been analyzed with the aim to establish the regional reference indices. The measurements were performed by the atomic-absorption method. The population deficiency of the essential microelements of zinc, copper along with the simultaneous excess of magnesium, mercury was revealed to be observed at the territory of the Irkutsk Region. According to the results of the study of mercury level in biological medias of the children population of the Irkutsk region it is possible to mark the unfavorable areas where chronic anthropogenic load has led to the accumulation of mercury in the body.

[Hygienic assessment of toxic dust factor at the aluminium smelter in Eastern Siberia].

There is presented the assessment of priority toxic matters in the air of working zone for basic occupations of aluminum smelting by electrolysis. There are presented results of different production technologies. There are presented the results of the physical-chemical analysis of the morphology and composition of produced toxic-dust complexes.

[Assessment of carcinogenic risks to workers of the main enterprises of the Irkutsk region].

The purpose of research is the assessment of the individual cancer risk (ICR) for workers of the basic occupations in key branches of industry of the Irkutsk region. There was executed the calculation of ICR levels for workers of the basic occupations of the aircraft industry, aluminum smelters and vinyl chloride production plants. The estimation of the exposure for workers was carried out according to long-term time-weighted average concentrations in the air of the working area, for the population - on annual average concentrations in the ambient air. To assess the risk that is not associated with the profession, the dose was calculated for the period of life (70 years). When calculating the toxicant doses in the working area there were used the "standard" indices ofpulmonary ventilation for adults, body weight, the work experience in the contact with carcinogens of 30 years, the number of days in the contact of 240, the duration of the working time 8 or 12 hours (in accordance with the working hours) duration. ICR for the Irkutsk population amounted of 3.08E-04, in Shelekhov - 4.8E-05, Sayansk - 1.1E-05. The amount of risk depends on the content offormaldehyde in all territories and chromium VI in cities of Irkutsk and Shelekhov. ICR for workers of basic occupations of studied plants in dozens of times are higher than for the urban population. Priority carcinogens are: chromium VI, nickel, formaldehyde, silicon dioxide -for the aircraft plant employees; 1,2-dichloretan, vinyl chloride - for the workers of vinyl chloride production plant; benzopyrene - for the aluminum smelter workers.

[Monitoring of wokplace air and coveralls pollution with mercury, and its content of biologic materials in workers engaged into caustic soda production].

The article covers retrospective evaluation of workplace air pollution with mercury in caustic production, and mercury content of swabs from coveralls and of biologic materials in the workers under study. The highest mercury content of biologic materials (blood, hair) was seen in workers of electrolysis workshop and mercury-containing sludge regeneration workshop. The authors revealed correlation between individual value of exposure to mercury and mercury content of biologic materials.

[Evaluation of toxic dust factor in aluminium production (analytic review)].

Ambient air of aluminium production appeared to contain over thirty pollutants. Identification and quantitative evaluation of these pollutants are very difficult. Nature of occurring mixtures and their physical and chemical aggregate state remain unclear. Topical problem is to expand a list of detectable components via contemporary chemical analytic studies.

[Results of biomonitoring for zinc in children of the Irkutsk region].

The aim of the work is to test the application of the method of evaluating the content of zinc in the hair of the child population for solving SHM tasks on the example of the Irkutsk region. In total 426 children aged 5-6 years were examined, selected in four groups. The first group was consisted of children residing in a large industrial center to the south of the region, the second--in the the small town of the central part, the third group was formed by rural children of the central region, and the fourth--the northern and foothill regions. Hair analysis was performed by atomic absorption method. Found that zinc content in hair was established to be prone to significant variability. In children of the southern industrial center of the region (Group 1) there was noted the least amount of zinc (median is of 65.6 mg/kg). In 53% of the samples the element content was below the absolute norm (AN), out of which 25% below the biologically permissible limits (BPL). Only in 8.5% of the samples the zinc content exceeded AN and 3%-- BPL. In the range of AN there are 38% of the children, within the BPL range--71%. In the 2nd, the median of the concentration of zinc in the hair was 152.5 mg/kg. In the range of the AN there were 53% of the samples, in the BPL range--86% of the samples. Deviations from the reference levels were observed in the direction of exceedence of values. 36% of rural children (group 3) are provided with zinc within the limits of AN, 93%--within BPL. Only in 6% of children the zinc content in the hair below AN or BPL. In the 4th Group only 7.7% of samples were in the AN range and 27% of the samples--in the BPL range. 92% of the samples were way beyond the limits of AN and 73%--beyond the BPL. In most of the samples the higher content of zinc was observed. The highest concentrations of zinc in hair were observed in children living in the northern foothills and the Irkutsk region, which are characterized by elevated levels of this metal in the soil. In the diet of the inhabitants of these regions there is prevailed local food of animal origin, which is the main source of the entry of zinc into the body. In areas of intensive industrial development, despite the rather high zinc content in the objects of the environment, there was noted the high frequency of the zinc deficiency states, especially in conditions of complex chemical factors exposure and lifestyle that may be associated with features of not only input, but also the absorption of zinc in the body children.