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Publications (25)
The aim of this research was to design and synthesize new lipid conjugates of 7-DHC that could serve as a new storage form of esterified provitamin D3, increasing the reservoir of this biomolecule in the epidermis and enabling controlled production of vitamin D3 even during periods of sunlight deficiency. Acylglycerol and glycerophospholipid contai...
Two novel lipids, acylglycerol and glycerophospholipid containing succinate-linked provitamin D3 at sn-2 position of glycerol backbone, have been synthesized from dihydroxyacetone (DHA) and sn-glycerophosphocholine (GPC), respectively. Three-step synthesis of 1,3-dipalmitoyl-2-(7-dehydrocholesterylsuccinoyl)glycerol involved esterification of DHA w...
Citation: Stegenta-Dąbrowska, S.; Korendał, M.; Kochanowicz, M.; Bondos, M.; Wiercik, P.; Medyńska-Juraszek, A.; Zafiu, C. The Abstract: This work examines the influence of the degradation behaviors of biotic and abiotic conditions on three types of biodegradable products: cups from PLA and from cellulose, and plates from sugarcane. The main object...
Humic substances (HSs) present in water and wastewater cause fouling of anion exchange resins (AERs), which mainly results in reducing the ion exchange capacity (IEC). In this paper, an attempt was made to investigate fouling of two polystyrene and one polyacrylic AER using water from the Oder River, treated wastewater after the ultrafiltration pro...
A rapid and inexpensive method, Fourier transform infrared spectroscopy (FTIR), can be used to identify impurities and determine the functional groups responsible for the sorption of specific ions. The FTIR method has already been used in research. However, there is a lack of research on constructed wetland (CW) infill materials used to treat landf...
Fourier transform infrared (FTIR) spectroscopy and laser diffraction are commonly applied methods to assess the quality of activated and digested sludge. However, the effect of particle size on FTIR data has never been thoroughly explored. There is also scarce literature on the application of FTIR spectroscopy in conjunction with laser diffraction...
Process baths used for electropolishing and pickling of stainless steel have become increasingly contaminated with heavy metal ions over time. There is still lack of research on the neutralization of this type of technological wastewater with high concentrations of metal ions and containing complexing compounds, which significantly hinders their ef...
The presented study concerns the efficiency of removing nutrients, organic compounds and metal cations from municipal sewage by using a cylindrical photobioreactor (PBR) with biomass of microalgae growing on pine bark. The study was conducted in two cylindrical PBRs fed with municipal wastewater for 42 days. PBRs were internally illuminated with re...
Organic fouling of an anion exchange resin results from the adsorption of the organics on its surface which block the diffusion of mobile ions inside the resin beads. As a result a decrease in a total capacity is observed. Generally the performance of anion exchangers is determined based on the breakthrough curves and studies of the adsorption kine...
Fouling of the anion exchangers with organic compounds is a very common phenomenon. These compounds adsorb on the anion exchangers surfaces causing a decrease in the ion-exchange capacity. In practice, the performance of ion exchanger is generally assessed based on the breakthrough curves and the studies of the adsorption kinetics. There is little...
Often within literature can be found descriptions of research using the technique of laser diffraction to characterize the composition of sewage and water, measurements of the number and volume of particle
size distribution and fractal dimension of activated sludge flocs. This study focuses on the potential
of the application of laser granulometric...
Due fast biomass production, high affinity for N and P and possibilities to CO2 sequestration microalgae are currently in the spotlight, especially in renewable energy technologies sector. The majority of studies focus their attention on microalgae cultivation with respect to biomass production. Fuel produced from algal biomass can contribute to re...
The analysis of particle size in suspensions carried out with use of the laser diffraction method enables us to obtain not only information about the size of particles, but also about their properties, shape and spatial structure, determined basing on fractal dimension. The fractal dimension permits the evaluation of the interior of aggregates, at...
Jednym z problemów występujących na oczyszczalniach ścieków jest wytrącanie się struwitu. Kontrola procesu wytrącania się struwitu stwarza możliwości ochrony instalacji technologicznych przed jego negatywnymi skutkami, a powstały struwit może być wykorzystany jako nawóz mineralny. W pracy omówiono przyczyny tworzenia się struwitu w przewodach do tr...
The study presents the results of measurement of particle size distribution in suspensions contained in spent filter backwash water obtained from the water treatment plant in Golȩdzinów. Spent filter backwash water samples were collected in three test series during the backwashing of iron and manganese removal filters, during the period from 20 Aug...
In Poland, water supply for villages and small towns is provided mainly from groundwater resources. In spite of good physicochemical and bacteriological properties for groundwater, in most cases it is required to remove iron and manganese, which influences the applied treatment technologies. The processes of potable water treatment result in the em...
Coagulation is the- common process used mainly to remove colloids from water. Colloids aire responsible i. a. for color and turbidity, Among many factors affect ins; coagulation very important are size and structure of the flocks produced during this process. The knowledge of the spatial structure of the lines enables one to predict their settle an...
The interest in green roof technologies is increasing due to the many tangible benefits that allow to provide. One of them is the ability to improve stormwater management in urban areas, because construction of green roofs can retain and delay in runoff . Due to the fact that the market of green roofs in Poland is relatively young, there is still a...
Granulometric composition of suspensions contained in filter backwash water affects filter treatment technology selection. The paper describes results of granulometric composition studies on filter backwash water suspensions collected from 46 groundwater treatment plants. An original, modified Avrami equation was proposed to interpret the results o...
The aeration process involved compressed air and was aimed at improving the sedimentation of the suspended solids that form in the course of groundwater treatment. The experiments have revealed that the aeration of the backwash water from the filters used for iron and manganese removal from the groundwater being treated not only accelerated the pre...