Microporous structures in natural polymer

Electrospinning of biodegradable poly (butylene succinate) has been performed from different solvent systems. Alternation of process parameters resulted in respective changes of the surface structure topography which was evaluated by using scanning electron microscopy (SEM)

The content of heavy metals in soils and plants around the waste landfill in Siechnice (Poland)

Metal concentrations (Cu, Zn, Pb, Ni, Cr) in soils and plants around the metallurgical waste landfill of Siechnice, Poland, have been determined. The soil samples were collected from the surface layer of 0-25 cm. The soils and plants were digested in HNO3, 60%, using the Microwave Digestion System (Milestone Start D). The analysis of metals has been carried out through the Flame Atomic Absorption Spectroscopy (FAAS) method. The pH and the conductivity of the soil solutions were measured. The pollution index (Wn) and the bioaccumulation coefficient (WB) have been determined. The permissible content of Cu, Zn, Ni and Cr in soils were exceeded compared to the geochemical background in uncontaminated soils of Poland. Chromium concentrations have also been exceeded relative to the standard for soils, according to the Polish Ministry of Environment Regulation from September 1st, 2016. The assessment of the bioaccumulation coefficients of metals in plants (Plantagolanceolata L. and Zea mays L.) has shown significant bioaccumulation of copper and zinc compared to the permissible concentrations of undesirable substances in feed in agreement with the Polish Ministry of Agriculture and Rural Development Regulation from January 23rd, 2007

The content of heavy metals in soils and plants around the waste landfill in Siechnice (Poland)

Metal concentrations (Cu, Zn, Pb, Ni, Cr) in soils and plants around the metallurgical waste landfill of Siechnice, Poland, have been determined. The soil samples were collected from the surface layer of 0-25 cm. The soils and plants were digested in HNO3, 60%, using the Microwave Digestion System (Milestone Start D). The analysis of metals has been carried out through the Flame Atomic Absorption Spectroscopy (FAAS) method. The pH and the conductivity of the soil solutions were measured. The pollution index (Wn) and the bioaccumulation coefficient (WB) have been determined. The permissible content of Cu, Zn, Ni and Cr in soils were exceeded compared to the geochemical background in uncontaminated soils of Poland. Chromium concentrations have also been exceeded relative to the standard for soils, according to the Polish Ministry of Environment Regulation from September 1st, 2016. The assessment of the bioaccumulation coefficients of metals in plants (Plantagolanceolata L. and Zea mays L.) has shown significant bioaccumulation of copper and zinc compared to the permissible concentrations of undesirable substances in feed in agreement with the Polish Ministry of Agriculture and Rural Development Regulation from January 23rd, 2007

Unique properties of Ecoflex® electrospun structures

Electrospinning of biodegradable poly(butylene adipate-co-terephthalate) has been performed. Alternation of process parameters resulted in slight changes in the surface structure morphology of the obtained fibres which was evaluated by using scanning electron microscopy (SEM)

Polycaprolactone – new insight into classic material

An investigation on electrospinning of polycaprolactone polymer solution was provided in different process conditions. Although, in all attempts a structure of highly surface-to-mass ratio was achieved, alternation of spinning parameters resulted in products of different geometry. This opens a new way of controlled processing highly porous materials with broad field of application

PLA – based electrospun structures

Polymer matrix (MATER-BI) electrospinning tests were carried out under various process conditions. Structures with a diversified morphology have been obtained. Changing the parameters of electrospinning process (mainly voltage and solution concentration) resulted in products with different morphology

Polycaprolactone – new insight into classic material

An investigation on electrospinning of polycaprolactone polymer solution was provided in different process conditions. Although, in all attempts a structure of highly surface-to-mass ratio was achieved, alternation of spinning parameters resulted in products of different geometry. This opens a new way of controlled processing highly porous materials with broad field of application