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Assessing the Environmental Condition of Minor Rivers in Urban Areas

Kuznetsov V. S., Petrov D.S.

Journal of Ecological Engineering

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2017

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Vol. 18, nr 6

110--114

EN

This article is devoted to the study of water and sediment pollution in the channel of the Neva delta. Spectrophotometry was used to determine the concentration of pollutants in water. In the chemical analysis of the precipitate, atomic absorption spectroscopy and infrared spectroscopy were used. Analysis of the hydrochemical composition and sediment of the Smolenka River showed high concentrations of heavy metals and petroleum products. At the same time, the hydrochemical composition of the Smolenka River is highly unstable, but the concentration of oil products and lead in the sediments indicates the presence of local pollution sources. Based on our findings, we are guided by the restoration of the aquatic environment.

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Ocena zanieczyszczenia osadów antropogenicznych zbiorników wodnych w centralnej części Wyżyny Katowickiej

Pasieczna A., Bojakowska I.

Przegląd Geologiczny

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2016

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Vol. 64, nr 10

806--813

EN

The paper deals with sediments of anthropogenic reservoirs from the central part of the Katowice Upland. Over most of the area, the original relief was considerably altered due to many-years’ mining of hard coal, historical mining and processing of zinc-lead ores, smelting of iron and non-ferrous metals, and chemical and machinery industries. The changes in land surface give rise to mining collapse areas transformed to water reservoirs. Sediment samples (103 samples in total) were collected form artificial lakes, ponds and settling ponds. Samples were air-dried, sieved through a 0.2-mm nylon sieve and digested in aqua regia. Contents ofAg, Al, As, Ba, Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Mo, Ni, P Pb, S, Sn, Sr, Ti, Vand Zn in the samples were determined by the ICP-OES method. Mercury content was measured using the CV-AAS method. To assess the extent of sediment contamination the Index of Geoaccumulation (Igeo) and the ecotoxicological (Threshold Effect Concentration and Probable Effect Concentration) criterion were used. The sediments show very different chemical compositions. The content of trace elements varies from values lower than the regional geochemical background of the Silesian-Cracow region to extremely high concentrations. Distribution of many toxic chemical elements is characterized by high spatial variability and a strong dependence on the location of pollution sources. About 60% of analysed samples were heavily contaminated due to the very high concentration of cadmium (up to 905.9 mg/kg), lead (up to 25,081 mg/kg) and zinc (up to 45,361 mg/kg) as well as arsenic (up to 2,220 mg/kg), chromium (up to 901 mg/kg) and mercury (up to 11.80 mg/kg). Due to the concentration of metals (TEC and PEC values) almost 80% of the sediments can be harmful to aquatic organisms, as well as to wild animals that consume them. The main cause of harm is the very high concentrations of cadmium, lead and zinc, less of silver, arsenic, chromium, copper and nickel.

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Distribution and fate of polycyclic aromatic hydrocarbons (PAHs) in recent sediments from the Gulf of Gdańsk (SE Baltic)

Lubecki L., Kowalewska G.

Oceanologia

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2010

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No. 52 (4)

669-703

EN

Polycyclic aromatic hydrocarbons (PAHs) were determined in recent (0-10 cm) sediments from the Gulf of Gdańsk during 2003-07 and correlated with environmental parameters. Located in the south-eastern part of the Baltic and receiving the waters of the River Wisła (Vistula), this area of negligible tides and strong anthropogenic stress, highly eutrophic as a consequence, is an exceptional model basin for studying the fate of hydrophobic organic contaminants introduced to the sea. Environmental conditions determine the distribution and composition patterns of parent PAHs in Gulf of Gdańsk sediments. PAHs were associated mainly with fine particle sediments, rich in organic carbon, with hypoxia/anoxia near the bottom. The highest PAH contents were found in the Gdańsk Deep (ca 110 m), where the mean concentration of Σ12PAHs was ∼3600 ng g-1, and no distinct temporal trend was observed. Lighter PAHs were found to be depleted in deeper regions. It was estimated that the Wisła discharges ∼50% of the total PAH load deposited in recent Gulf sediments.