Metals In Lake Research Articles

Seasonal changes of superoxide dismutase activity in erythrocytes ofAbramis brama from two different types of Poland lakes

The toxic role of heavy metals in lakes, rivers and marine ecosystems has been very often investigated during recent years. The toxicity of the individual metals and their ability to promote various metabolic changes of fish organisms are detected. It has been suggested that heavy metal ions stimulate lipid peroxidation and O{sub 2}{sup {minus}}-dependent formation of OH free radicals. An important aspect of free radical-mediated toxicity is that it is moderated by several cellular defense mechanisms including enzymatic and non-enzymatic systems. The aim of present work was to investigate the effect of seasonal variations of erythrocyte SOD, lipid peroxidation (LP) as well as water heavy metals and environmental conditions on bream fishes from two different lakes.

Sedimentary trace metals in lakes in Ibadan, Nigeria

A study of the distribution of trace metals in sediments of some lakes in Ibadan (Nigeria) showed that > 90% of the iron and manganese, 80% of the zinc, 60% of the lead and 30% of the copper and nickel in the sediments were acid leachable when compared with the total levels determined by X-ray fluorescence. We did not find any significant difference between wet season and dry season concentrations. Compared with the soils in their catchment areas, the lakes showed enrichment factors of 3–4, but no significant man-made contamination was observed.

Untersuchungen zum Verhalten von Schwermetallen in Gewässern II. Die Bedeutung der Eisen- und Mangan- Remobilisierung für die hypolimnische Anreicherung von Schwermetallen

Untersuchungen zum Verhalten von Schwermetallen in Gewässern II. Die Bedeutung der Eisen- und Mangan- Remobilisierung für die hypolimnische Anreicherung von Schwermetallen

Untersuchungen zum Verhalten von Schwermetallen in Gewässern I. Die Bedeutung eisenoxidierender Bakterien für die Kopräzipitation von Schwermetallen

Untersuchungen zum Verhalten von Schwermetallen in Gewässern I. Die Bedeutung eisenoxidierender Bakterien für die Kopräzipitation von Schwermetallen

Deposition and chemistry of pollutant metals in lakes around the smelters at Sudbury, Ontario

Deposition and chemistry of pollutant metals in lakes around the smelters at Sudbury, Ontario

A biogeochemical study of heavy metals in lakes and streams, and a proposed method for limiting heavy-metal pollution of natural waters

A biogeochemical study of heavy metals in lakes and streams, and a proposed method for limiting heavy-metal pollution of natural waters

Heavy Metals in the Great Salt Lake, Utah

The Great Salt Lake is a closed basin that drains a large part of northern Utah and parts of Wyoming and Idaho. The lake is a repository of all inorganic materials both suspended and dissolved that are carried by the streams flowing into the lake. Some of the salts are concentrated by several orders of magnitude in the lake over the natural concentration in the inflowing streams. It is the objective of this paper to determine if several heavy metals, specifically copper, zinc, cadmium, mercury, lead, and arsenic are also concentrating in the lake and to determine the behavior of these metals in the lake. A major obstacle to the study was the difficulty in analyzing the trace elements in the concentrated lake brines due to interference from the salts in the water. Methods for analyzing trace elements in brines were developed and are explained in detail in the paper. It was found that the concentrations of both total and dissolved metals in the lake are very low, and in the case of copper, zinc, and cadmium, are lower than the concentrations in the inflowing streams. It appears that the metals are precipitating along with clays, organics, and carbonates into the bottom sediments of the lake where anaerobic bacterial action is immobilizing the metals.