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Wyszukujesz frazę "methylmercury" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Mercury and methylmercury in Baltic Sea sediments, and Polish and Lithuanian soils
Autorzy:
Ignatavičius, Gytautas
Unsal, Murat H.
Busher, Peter E.
Wołkowicz, Stanisław
Satkūnas, Jonas
Valskys, Vaidotas
Powiązania:
https://bibliotekanauki.pl/articles/2201219.pdf
Data publikacji:
2022
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
mercury
methylmercury
soil
sediment
Lithuania
Polska
Baltic Sea
Opis:
We review the current environmental pollution by mercury in the soils of Poland and Lithuania and in the sediments of the Baltic Sea. Mercury is documented to have many negative impacts on the environment as a toxic trace element. In many different chemical forms, it is being released into the environment by both geogenic and anthropogenic activities, with most being released from anthropogenic sources. Methylmercury is considered one of the most toxic forms found in the environment. Mercury levels in sediment and various point sources increased after World War II in the Baltic Sea, which was used as a dumpsite. Previous studies show noticeable differences in total mercury in the Baltic Sea. In the Warta and Odra rivers in Poland, mercury levels are also higher than the background value, though recent findings suggest that river sediments are not the main source of mercury to marine sediments. Concentrations in soils in Poland and Lithuania were below the level of limit values (1 and 1.5 mg/kg-1 respectively), but Upper Silesia showed concentrations (up to 4.01 mg · kg-1) above the limit values. Furthermore, between 1992 and 2006, mercury levels in Wroc³aw dropped dramatically. The dominant trees in the area can affect mercury accumulation. No data were available for comparison with the soils in Estonia and Latvia.
Źródło:
Geological Quarterly; 2022, 66, 3; art. no. 22
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fish and fish products as risk factors of mercury exposure
Autorzy:
Kimakova, T.
Kuzmova, L.
Nevolna, Z.
Bencko, V.
Powiązania:
https://bibliotekanauki.pl/articles/2081851.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Tematy:
fish
methylmercury
daily intake
atomic absorption spectrometry
seafood
Opis:
Introduction and objective. Mercury is ubiquitous in the biosphere, occurring in the air, water, land, and soil, as well as in living organisms. Excessive exposure to mercury is associated with a wide range of adverse health effects including damage to the central nervous system and the kidneys. Mercury exists in many different forms in the environment which produce various patterns of toxicity. Protection of the food chain from contamination by mercury is an important task in the protection of health of the human population. Objective. The aim of the study was to monitor the concentrations of mercury in fish and fish products from food retail in Eastern Slovakia, and from the Ružín water reservoir, Košice district. Materials and method. A total of 384 samples of fish and fish products were collected for the study. Atomic absorption spectrometry standard solutions for mercury were used at a wavelength of 254 nm. Results. The majority of countries and global organizations now enforce a maximum concentration of mercury in fish of approximately 0.5 mg.kg-1. All of the 184 samples (50.52 % of the total fish samples studied) were above the maximum level set by the European Commission Regulation for mercury in fish. Conclusions. The systematic analytical control of contaminants in food is important. Mercury is concentrated in seafood, products of prey and marine fish, fish from rivers and lakes in the areas contaminated by mercury. According to the findings of this study with analyzer AMA 254, the consumption is not recommended of fish, especially seafood (meat of shark, swordfish and king mackerel), for selected groups of the population: children, women of childbearing age, pregnant women and nursing mothers.
Źródło:
Annals of Agricultural and Environmental Medicine; 2018, 25, 3; 488-493
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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