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The investigations of the chemical composition of sands were conducted on the beach in Ustka and Czołpino. The Ustka is a typical tourist town and Czołpino is located in the Slovinski National Park away from urban or rural areas. The beach sediments in Ustka contain much more organic matter, nitrogen and phosphorus compounds as well as calcium carbonate than analogous deposits in Czołpino. The effect of sea water was manifested in the high content of organic matter in places having permanent contact with sea water. The content of the organic matter increased together with with the depth of settlings in these places. However more organic matter in surface layers was observed in regions more distant from the sea, because penetration of organic matter into the sediments is possible during precipitation. The concentration of ammonia nitrogen in the analyzed beach deposits increased with depth, what probably results from the lower oxygen content in deeper layers. It was confirmed that organic matter in sands of the beach in Czołpino is of natural origin, while in Ustka it is primarily of anthropogenic origin.
The study of heavy metals concentration in the estuarine lake Gardno water and bottom sediments showed that the river Łupawa and periodic inputs of sea water exert decisive influence on forming of the water stores and bottom sediments quality in this lake. The largest concentrations of Cd, Cu, Mn, Pb and Zn were observed at river mouth into the lake region (Cd – 0.26, Cu – 3.71, Mn – 94.3, Pb – 10.01, Zn – 16.26 μg dm-3) and the lowest at water outflow from the lake region (Cd – 0.13, Cu – 1.81, Mn – 53.8, Pb – 8.86, Zn – 8.05 μg dm-3). Average concentrations of those metals in the lake water, suspension and bottom sediment form the following row: Mn>Zn>Pb>Cu>Cd. The contents of analysed metals were the highest in interstitial water, smaller in near-bottom water and the smallest in surface water. Average content of metals in near-bottom suspension was about 30% higher than that in surface suspension, but enrichment factors of those metals in suspensions do not show essential statistic differences. This probably results from continual mixing of water masses by wind. The migration coefficients indicated that bottom sediments of lake Gardno have large accumulation properties of heavy metals.
In July 2000 the diurnal cycle of analyses was conducted in order to determine variation in the concentrations of nitrogen and calcium compounds as well as dissolved gases in surface microlayers of a shallow coastal barrier lake located at the Baltic Sea coast. Water for analyses was collected in a diurnal cycle for the period of 24 h from lake Dołgie Wielkie. The analyses were conducted on the surface microlayer with a thickness of approx. 100 μm, a layer with a thickness of approx. 250 6m and a layer of subsurface water from a depth of 15 cm. Based on the analyzed data, information was collected on the migration of nitrogen compounds between the analyzed layers. Changes were observed in nitrogen forms reduced to oxidized forms and vice versa.
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The measurements of chemical components in water of Wieprza River showed that water of this river in 2002-2003 was characterised by the high purity. The average values of most indexes were contained in the ranges of standards for the first purity class. Nevertheless considerable increase of investigation parameters was observed in zone of sewage-treatment plant and uncontrolled waste dump. The part of flow downing pollutions were absorbed by peat soils. Kępice town bring into Wieprza River the load of organic matter miscalculating to BOD5 average 133 kg O2 d-1 (85 t O2 y-1), the load of nitrogen 140 kg N d-1 (51 t N y-1) and phosphorus 18 kg P d-1 (6.2 t P y-1). However Wieprza River shows high self-purification ability. The level of investigation components in this river (4 km outside of the Kępice town) returned to the level which was 2 km before the town.
Higher nutrients concentrations were observed into the surface microlayer then in the subsurface of estuarine, shallow lake water. The thinner the surface microlayer, which means the closer it is to the water-atmosphere contact zone, the higher are concentrations of organic and inorganic phosphorus, as well as organic and ammonia nitrogen. Mean values of enrichment coefficients were usually positive. The highest values of these coefficients were found for organic phosphorus and organic nitrogen in relation to phosphates, ammonium nitrogen and nitrate nitrogen.
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Heavy metals in some peat soils of Middle Pomerania

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The content of heavy metals in peat soils of north part of Słupsk Region was low. Enrichment factors for Cd, Zn and Mn indicates on their anthropogenic origin in studied peat soils, and for Cr and Ni - natural origin. However copper may be of anthropogenic or natural origin depending on location. The farther from sea peat soils are situated the higher concentration of those metals is.
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The aim of this work was the assessment of the age, sex, way of nutrition, environment and health state influence on zinc content in hair of population living in the Middle Pomerania. Within years of 2005-2007 hair coming from 416 persons from a ten months old child to a 75 years old person was analyzed. All people were divided into four age groups: children (0-15 years), youth (16-25), adults (26-50) and the elderly (51-75). 3-centimeters long hair (counting from the skin) were put to chemical analyze. Then dried samples were weighed and mineralized with mixture of nitric and tetraoxochloric acides (mixed in proportion of 5:1). Zink determination was done by method of atomic absorption spectrophotometry using spectrometer ASA-3. Average zinc content in hair of researched population amounted to 167±58 7g g-1. Least of all zinc was ascertained in children hair (av. 125 7g g-1), and most of all in youth (194 7g g-1). In all age groups females had more of this metal (av. 180 7g g-1) than males (156 7g g-1). Average value of zinc for people living in a village was 147 7g g-1, and living in towns and cities 181 7g g-1. The least of zinc we have found at persons being on the meat- or milk-free diet (av. 157 7g g-1) and the most at persons that did not restrict in eating meat and milk products (197 7g g-1). The persons suffering from cardiovascular disease or hyperplasia prostate had adequately 221 and 195 7g g-1 Zn, considerably above the level in hair of without symptoms diseases persons (156 7g g-1). Smaller content of this element had persons suffering from atherosclerosis or hypertension (adequately 132 and 142 7g g-1).
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