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Iron sulphate and polyaluminum chloride are commonly used in water restoration to eliminate cyanobacteria bloom and improve water quality. Nevertheless, the influence of coagulants on water organisms remains insufficiently studied. The study involves the analysis of phosphate coagulants’ impact on calcium and magnesium concentrations in the Chara hispida community. The experiments were carried out...
Temporal and seasonal variability of hydrochemical properties in a deep, highly eutrophic lake was presented. It was shown that the feedback between the biocenosis and abiotic properties was of key importance for the lake environment, especially for features shaped by oxygen content. During vegetation season in a shallow trophogenic zone supersaturated with oxygen, quick depletion of some nutrients...
Our paper presents the study results of the first year of restoration of Lake Góreckie in Wielkopolska National Park. The restoration was carried out on several levels which involved: aeration of the hypolimnion using the pulverizing aerator with wind drive, phosphorus inactivation by iron coagulant, and reduction of plankton-eating fish. The comparison of the results obtained in the year 2010, that...
The analysis of 238 papers published in the Polish Journal of Environmental Studies concerning investigations on heavy metals conducted in the years 1998-2008 suggests a steadily growing interest in the issue. Investigations on the environmental problems in question are carried out by means of more modern research methods and using the most recent analytical equipment. Research on the role of heavy...
Variation of the chemical composition of bottom sediments collected from three lakes with different water mixis, morphometric parameters, catchment areas and anthropogenic pressures was analyzed. Sediment samples were characterized by water content and concentrations of organic matter, nitrogen, phosphorus, calcium, iron and aluminium. Statistically significant correlations between the content of...
This paper reports results of speciation analysis of selected heavy metals (Fe, Mn, Zn, Ni, Cu, Pb, Cd) in bottom sediment samples collected from 11 lakes in the area of Wielkopolski National Park, which is a protected area subjected to limited anthropogenic factors, The main aim of the study was determination of the distribution of the metals among five speciaiton forms defined by Tessier: exchangeable,...
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