Due to their ability to uptake and accumulate trace elements, as well as to regenerate after cutting, some species of willow and reed have been used for many years in environmental protection to purify sewage and neutralize sludge. The paper presents the results of the investigation on selected chemical properties of the osier willow shrubs (Salix viminalis L.) and common reed (Phragmites australis Cav. Trin. Ex Steud.) cut every year. The research was conducted on ground-plant beds in two small sewage treatment plants in the Lubelskie voivodeship in 2002-2004. Both plants use a similar wastewater treatment technology. Their bed areas, the ways in sewage is supplied, hydraulic loading, and pollutant load are different, though. According to the results, willow stems show a greater ability to accumulate nitrogen and phosphorus than reed stems. However, the potassium content in both willow and reed is at a similar level. Plants do not uptake nutrients from sewage for a whole year but only in a vegetation season. Yearly removal of plants from the ground-plant beds advisable due to high concentration of assimilated nutrients in leaves and stems. In flora remains on the bed, nutrient release to an environment occurs and the concentration of liberated ...
The aim of the study was to evaluate the contents of Cd, Pb, Zn and Cu in shoots of willow (Salix viminalis L.) cultivated in the vicinity of a coal ash and slag landfill. The landfill is surrounded by arable lands and meadows. There are two major negative influences of the landfill - dusting and flooding. The result of these interactions is the systematic reduction of agricultural value of the land. A field with an area of 9600 m2 were chosen. The land is located east to the landfill. A total of 40 samples of biomass was collected. The contents of analysed elements were determined by FAAS using a Unicam Solaar M6 spectrometer. Distance from the landfill affects the contents of Cd, Pb, Zn and Cu in the tested willow shoots. However, there is no single concentration pattern for all the investigated metals. An increase in willow cultivation on the described area can bring a good environmental effect and become an example of proper management of the ash and slag landfill neighbourhood. ...
