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Number of results: 9
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Abstract

This work determined the solid-water distribution coefficient Kd, the Freundlich constant KF and the organic carbon normalized coefficient K0c of ibuprofen in natural, aquifer sediments. They are characterized as silt sediments with different clay and sand fraction contents varied in specific surface areas. Content of organic carbon and pH are on the same level. For determining sorption coefficients values of ibuprofen in sediments, its concentration was measured in the aqueous and calculated in the solid phase. Batch tests were conducted following OECD Guideline 106. The resulting Kd values ranged between 1.14 and 2.29 L/kg, ~ between 0.25 and 5.48 and Koc between 1.22 and 2.53 for ibuprofen in sediments SI and S2, respectively. These experiments proved that the presence of clay minerals beside organic carbon and pH might be relevant in sorption of ibuprofen in sediments. A comparison of experimentally determined Koc with modelled Koc calculated on the base of octanol-water partitioning coefficient K0w shows that the prediction of sorption behaviour cannot be based only on Kow· This is probably due to the fact that these approaches well describe hydrophobic interactions, but fail to predict sorption of polar and ionic compounds.
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Authors and Affiliations

Katarzyna Styszko
Katarzyna Sosonowska
Piotr Wojtanowicz
Janusz Gołaś
Jerzy Górecki
Mariusz Macherzyński
ORCID: ORCID
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Abstract

The paper deals with examination of financial profitability of the introduction of rainwater utilization system (RWUS) in multi-family residential buildings. The aim of the work was to build a simulation model of such system and mak_e an LCC analysis of some options of rainwater utilization system. The proposed conception of a new method of selecting the most cost-effective option of RWUS includes: building of simulation model of such system, making the LCC analysis and using a scenario analysis for supporting decision making process with uncertainty. This new method has been applied to a dwelling house in Poland. The results obtained from the analysis demonstrate the unprofitabiliry of the introduction o fRWUS in multi-family residential buildings for the adopted location in Poland. The presented method can be used by individual designers and managers to decide on the selection of the most appropriate water supplying option for a specific location.
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Authors and Affiliations

Daniel Słyś
Tadeusz Bewszko
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Abstract

All multifunctional units combine flocculation and sedimentation to improve efficiency of treatment process. The characteristic feature of the unit is a contact of raw water with previously generated floes which enhances flocculation by increasing interparticle collisions and sorption ability offloes. On the basis of the authors' experience it was stated that in spite of significant differences between the procedure of conventional treatment and treatment in multifunctional units, an optimum coagulant dose is determined in jar testing which is commonly used for conventional treatment. The influence of sludge recirculation is not taken into consideration resulting in reagent overdosing. In this paper the results of the research on coagulation with postcoagulation sludge recirculation in aspect of sludge age are presented. It was stated that for the tested water, sludge recirculation may result in significant lowering of optimum alum doses provided that a proper degree of fresh sludge recirculation is applied.
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Authors and Affiliations

Barbara Gumińska
Marcin Kłos
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Abstract

Research on the occurrence of polyporus fungi in Czaplinek were conducted in 2004 and 2005 in 6 designated regions, using the route method (area search). 363 sites containing polyporus fungi belonging to 24 species and 4 families - Coriolaceae, Ganodermataceae, Hymenochaeteceae and Polyporaceae - have been found. The most numerous among the species were Bjerkandera ac/us/a (Wills. Fr.) P. Karst. (87 sites) and Ganoderma applanat um (Pers.) Pat. (66 sites). Three species listed on the Red List of makrofungi in Poland tDotroma mol/is (Sommer. Fr.) Dank, l110110/11s hispidus (Bull. Fr.) P. Karst. and Ganoderma l ucidum (W. Curt. Fr.) P. Karst.) have been identified. It should be noted that C. lucidum is one of the fungi under strict legal protection.
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Authors and Affiliations

Magdalena Kaczorkiewicz
Edward Ratuszniak
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Abstract

Polycyclic aromatic hydrocarbons (PAHs) belong to the group of recalcitrants that on reaching wastewater can irreversibly inhibit some sensitive biological processes in activated sludge such as nitrification. This situation leads to wastewater treatment failure due to the influence of these substances on bacteria responsible for important biochemical processes. Observation of the changes in bacterial diversity using molecular tools, such as denaturing gradient gel electrophoresis (DGGE), could be the first step in finding a way of preventing wastewater treatment failure. The aim of this experiment was to monitor bacterial biodiversity in a membrane bioreactor (MBR) dealing with synthetic wastewater contaminated with high concentration of petroleum organic compounds (POCs) and to study the influence of POCs contamination on bacterial changeability in activated sludge. COD removal in investigated membrane bioreactors was at a level of 93%. The organics removal efficiency was not affected by the maximal tested dose of petroleum contamination ( l OOO μl POCs/l of wastewater) and the MBRs wastewater treatment performance was undisturbed. DGGE analysis revealed that the biodiversity fluctuated slightly in control MBR, while in experimental MBR the biodiversity index decreased drastically after adding the highest experimental concentration of POCs. These results suggest that concentrations of POCs at levels from 50 μl/l to 500 μl/l stimulate biodiversity growth, while the concentration I OOO μI POCs/1 of wastewater seems to inhibit the most sensitive processes in wastewater treatment by influencing the bacterial biocenosis.
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Authors and Affiliations

Aleksandra Ziembińska
Sławomir Ciesielski
Jarosław Wiszniowski
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Abstract

The paper presents investigations of dust fractional composition concerning combustion of hard coal in circulating fluidized bed boilers (CFBs). Experimentally determined emission factors for such boilers, and also typical pulverized-fuel furnaces, furnaces with mechanical stoker and domestic furnaces arc presented. They all have been obtained for Upper Silcsian type of coal. Total dust and characteristic fractions: PM2.5 and PM 10 are covered.
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Authors and Affiliations

Jan Konieczyński

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