Journal ArticleDOI
Pike (Esox lucius L.) and some other aquatic organisms in Sweden as indicators of mercury contamination in the environment
TLDR
It is concluded that in many areas human activities has raised the mercury content of the environment far above the natural levels.Abstract:
Activation analysis of mercury content in axial musculature of pike (Esox lucius) has been used in the present study as a means of estimating the level of mercury present in the water environment. The concentration factor from water to pike is of the order 3000 or more. The relation between mercury content and weight and age of fish specimens is discussed. By a graphical method the values for mercury content for specimens representing 1 kilogram of weight have been calculated for a number of localities and used for geographical comparison. The effect of industrial contamination is demonstrated by a comparison of mercury content of samples of pike from above and below localities, where emission of waste water containing mercury takes place. There are strong indications that mercury appears also as an airborne pollution affecting the water environment. A number of sources of mercury contamination are discussed. It is concluded that in many areas human activities has raised the mercury content of the environment far above the natural levels. Pe3loMeread more
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Book
Metal pollution in the aquatic environment
TL;DR: This significant book provides not only an introduction to the dynamics of aquatic chem istries but also identifies those materials that jeopardize the resources of both the marine and fluvial domains.
Journal ArticleDOI
Mercury in the Swedish environment — Recent research on causes, consequences and corrective methods
Oliver Lindqvist,Kjell Johansson,Lage Bringmark,Birgitta Timm,Mats Aastrup,Arne Andersson,Gunnar Hovsenius,Lars Håkanson,Åke Iverfeldt,Markus Meili +9 more
TL;DR: In the last decade, a new pattern of Hg pollution has been discerned, mostly in Scandinavia and North America, mostly due to more widespread air pollution and long-range transport of pollutants.
Journal ArticleDOI
The use of biological indicator organisms to monitor trace metal pollution in marine and estuarine environments—a review
TL;DR: A review of the use of indicator organisms to study trace metal pollution can be found in this paper, where it is suggested that the macroalgae and bivalve molluscs are the most efficient and reliable indicators developed to the present time.
Journal ArticleDOI
Synthesis of methyl-mercury compounds by extracts of a methanogenic bacterium.
TL;DR: It was discovered later that the spent catalyst of an acetaldehyde reactor, which caused the pollution, contained approximately 1 per cent methyl mercury; and the biological methylation of mercury was thought to be insignificant.
Journal ArticleDOI
The common mussel Mytilus edulis as an indicator of pollution by zinc, cadmium, lead and copper. I. Effects of environmental variables on uptake of metals
TL;DR: The net uptake of copper by the mussel was extremely erratic, and was affected by salinity and temperature changes and by the presence of the other metals and changes in their relative concentrations, it is suggested that the mussels should not be used as an indicator of copper in the marine environment.
References
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Journal ArticleDOI
Mercury content in feathers of Swedish birds from the past 100 years
TL;DR: The appearance of increased mercury accumulations in birds mainly in the beginning of the 1940's indicates that alkyl-Hg compounds used as seed dressings are chiefly responsible for that increase.
Journal ArticleDOI
Simultaneous Determination of Mercury and Arsenic in Biological and Organic Materials by Activation Analysis.
TL;DR: In this article, a method was developed to determine quantitatively nanogram amounts of mercury and arsenic in biological and organic base materials using gamma spectrometers, and the sensitivity limits were about 5 x 10/sup -4/ ppm for mercury and 10/Sup -3/ to 10/ Sup -4 / ppm for arsenic when a sample weighing about 0.5 gram is irradiated for 2 to 3 days in a thermal neutron flux of about 10/SUP 12/ n/cm/sup 2/second.
Journal ArticleDOI
Die Verbreitung des Quecksilbers
Alfred Stock,Friedrich Cucuel +1 more
TL;DR: Die Zahlen geben nattirlich bei der geringen Anzahl kein t3ild des tats~chlichen Spektrums, aber sie Iassen deutlich erkennen, dab Iangsame Etektrohen nicht in erheblich gr6Berer Zahl vorhanden sind, als in der Tabetle I.
Journal ArticleDOI
Bioaccumulation of Radioisotopes through Aquatic Food Chains
J. J. Davis,R. F. Foster +1 more
TL;DR: The processes of adsorption and absorption are of major importance in the uptake of radioisotopes by plants but appear to be of less importance than the food chain inThe uptake by aquatic animals.