Wyniki wyszukiwania - BazTech

1

Distribution of oil, grease and polycyclic aromatic hydrocarbons in coastal water and sediments of Suez Bay

Elmorsi Randa

Oceanological and Hydrobiological Studies

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2021

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Vol. 50, No. 4

373--384

EN

The permanganate index (PI), oil and grease (O&G), and 17 polycyclic aromatic hydrocarbons (PAHs) were analyzed in surface sediment and water samples collected at 13 sites along the western coast of Suez Bay (SB). PI and O&G in the SB coastal seawater ranged from 9.6 mg O2 l−1 and 17.0 mg l−1 to 16.0 mg O2 l−1 and 37.0 mg l−1, respectively. The level of polycyclic aromatic hydrocarbons (PAH) in water and sediment in the SB offshore area was determined by gas chromatography/flame ionization detection. The concentration ranged from 0.574 to 16873.2 ng g−1 in the sediment and 0.502 to 43.540 ng l−1 in water. The collected data were compared with values reported in the literature. The possible source and origin of pollution was also assessed based on the determined relative PAH levels at the study sites, the ratio of low molecular mass PAHs (LPAHs) to high molecular mass PAHs (HPAHs), and molecular indices of samples.

2

Changes of water pollution dynamics in Vistula river on Warsaw city area

Dębska K., Rutkowska B.

Infrastruktura i Ekologia Terenów Wiejskich

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2017

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nr II/2

849--861

EN

The paper presents change of water quality within Vistula River in the city of Warsaw. Water samples for analysis were taken from four different measurement points in the period from February to June 2016. Based on the results of laboratory studies it was demonstrated that the Vistula River in Warsaw is exposed to the input of pollutants contributing to increase the salinity, especially in winter and early spring. The concentration of both chlorides and sulphates were highest in February and was decreasing in subsequent months of the year. At the same time it has been shown that during the entire study period the concentration of Cl– ion exceeded the limit values for water quality II class in Poland. While the SO4 2– concentrations in water samples taken in the winter months (February-March) exceeded the limit values for the second quality class, in April, it was within the acceptable range for II class water quality, and in May and June does not exceed the value referred to as standard for I class of water quality. Based on the analysis of indicators of nutrients (N-NH4 , N-NO3 , Ptot.) it was found that the Vistula is not exposed to eutrophication due to their low concentration, which indicates a very good water quality. At the same time permanganate index (CODMn) indicates a low organic load of Vistula.

3

Ocena porównawcza wyników oznaczeń wód metodą utlenialności i indeksu nadmanganianowego na przykładzie wody pobieranej z rzeki Raby

Kułakowski P., Oramus E.

Czasopismo Techniczne. Środowisko

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2005

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R. 102, z. 4-Ś

55--62

PL

W artykule porównano wyniki oznaczeń wody surowej i uzdatnionej z rzeki Raby metodą utlenialności i indeksu nadmanganianowego. Stwierdzono, że w zdecydowanej większości przypadków wyniki oznaczeń indeksu nadmanganianowego były niższe od wyników oznaczeń utlenialności, a wskaźniki te wykazywały słabą korelację.

EN

Results of the Raba river analyses of permanganate value and permanganate index was compared in the paper. In most cases higher results of permanganate value than permanganate index and weak correlation between them was observed.