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Publications Repository
Gdańsk University of Technology

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Publications from the year 2014

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  • Application of Diagnostic Ratios of PAHs to Characterize the Pollution Emission Sources
    • Marek Tobiszewski
    2014

    The paper summarizes the potential of application of parent polycyclic aromatic hydrocarbons (PAHs) to identify their emission sources. Four parent PAHs diagnostic ratios are used for this purpose: anthracene/(anthracene + phenanthrene), fluoranthene/(fluoranthene + pyrene), benzo[a]pyrene/(benzo[a]pyrene + chryzene) and indeno[1,2,3-c,d]pyrene/(indeno[1,2,3-c,d]pyrene + benzo[g,h,i]perylene). The compounds of each ratio have the same molar mass and similar physicochemical parameters, so they are characterized by similar environmental fate. Thus, the ratios ideally remain constant from the moment of emission to sample collection and analysis. The ratios allow to identify PAHs emissions from unburned petroleum, petroleum combustion and biomass burning. The example of application to surface water samples is presented.

  • Application of dynamic impedance spectroscopy to scanning probe microscopy.
    • Mateusz Tobiszewski
    • Anna Arutunow
    • Kazimierz Darowicki
    2014 MICROSCOPY AND MICROANALYSIS

    Dynamic impedance spectroscopy, designed for measuring nonstationary systems, was used in combination with scanning probe microscopy. Using this approach, impedance mapping could be carried-out simultaneously with topography scanning. Therefore, correlation of electrical properties with particular phases of an examined sample was possible. The sample used in this study was spheroidal graphite cast iron with clearly defined phases having significantly different properties. Additionally, impedance-force curves were made at graphite precipitation and ferrite matrix to illustrate the relation between impedance and the force applied to a probe.

  • Application of ferric chloride for arsenic removal in the integrated process: coagulation/microfiltration
    • Rafał Bray
    • Karolina Fitobór
    2014

    The study presents results of using iron coagulation integrated with microfiltration to remove arsenic from water. Tested samples of natural groundwater contained approximately 32 μg/L of arsenic, 0.13 mg/L of iron and 0.085 mg/L of manganese. As a coagulant the aqueous solution of ferric chloride was dosed in portions from 1.0 to 10.5 mg/L. In the research microfiltration membranes with 400 kDa MWCO were used. Tests indicated that even at low iron coagulant doses (1.5 mg/L) reduction of arsenic concentration below acceptable level for drinking water (10 μg/L) was obtained and arsenic retention factor reached 74%. Increasing dosage of coagulant resulted in further improvement on the arsenic removal. Additionally iron concentration in the permeate was in trace amounts over the entire dose range. Reduction of such parameters as color, UV absorbance and permanganate value was also obtained. However method was inefficient in removing manganese from groundwater.

  • Application of gamma densitometry and statistical signal analysis to gas phase velocity measurements in pipeline hydrotransport
    • Marcin Zych
    • Robert Hanus
    • Leszek Petryka
    • Dariusz Świsulski
    • Anna Strzępowicz
    • Piotr Zych
    2014

    The work presents selected methods of signal analysis used in the processing of data obtained from radiometric probes. The used data came from an exemplary study of a two-phase liquid-gas flow at the laboratory installation. In such rigs many possible transport types may be observed, i.e. slug, plug and bubble flow, and each of them gives different signal-to-noise ratio of recorded data. Therefore, available radiometric methods of gas phase velocity measurements give diverse accuracies. Authors consider several improvements of data acquisition and processing which increase possibility of the flow type recognition and higher accuracy of the gas phase velocity estimation.

  • Application of guided wave propagation in diagnostics of steel bridge components
    • Magdalena Rucka
    • Beata Zima
    • Rafał Kędra
    2014 Full text Archives of Civil Engineering

    Early detection of potential defects and identification of their location are necessary to ensure safe, reliable and long-term use of engineering structures. Non-destructive diagnostic tests based on guided wave propagation are becoming more popular because of the possibility to inspect large areas during a single measurement with a small number of sensors. The aim of this study is the application of guided wave propagation in non-destructive diagnostics of steel bridges. The paper contains results of numerical analyses for a typical railway bridge. The ability of damage detection using guided Lamb waves was demonstrated on the example of a part of a plate girder as well as a bolted connection. In addition, laboratory tests were performed to investigate the practical application of wave propagation for a steel plate and a prestressed bolted joint.

  • Application of Headspace Solid-phase Microextraction with Poly(1-vinyl-3- Hexylimidazolium Chloride) Polymeric Ionic Liquid Coating using GC - MS to Determine Volatile Fatty Acids in Dairy Wastewater
    • Marta Wasielewska
    • Bogdan Zygmunt
    • Jared Anderson
    2014 CHROMATOGRAPHIA

    Volatile fatty acids were determined in this study using headspace solid-phase microextraction (HS-SPME) with a poly(1-vinyl-3-hexylimidazolium chloride) polymeric ionic liquid coated fiber followed by gas chromatography - mass spectrometry. Experimental parameters such as extraction time and temperature, sample volume as well as desorption time and temperature were optimized. Detection limits of the method were in the range of 0.13- 0.26 mg/L. The coefficient of variation ranged from 0.12% to 6.9%. The method was applied to determine volatile fatty acids in dairy wastewater from different operations and in bulk wastewater.

  • Application of inserts for suppression of coupled dynamic-acoustic effects during confined granular flow in silos
    • Maciej Niedostatkiewicz
    • Michał Wójcik
    • Andrzej Tejchman-Konarzewski
    2014 ADVANCED POWDER TECHNOLOGY

    Artykuł omawia sposoby redukcji efektów dynamiczno-akustycznych w silosach. Do redukcji zastosowano różne wkładki. Zbadano wpływ kształtu i liczby wkładek w doświadczeniach. Na podstawie wyników doświadczalnych opracowano metodę redukcji efektów dynamiczno-akustycznych w dużych stalowych silosach.

  • Application of ionic liquids in chromatographic techniques
    • Patrycja Makoś
    • Grzegorz Boczkaj
    2014 Camera Separatoria

    Ciecze jonowe (ang. Ionic Liquids, ILs) z uwagi na swoje unikalne właściwości fizyko – chemiczne oraz możliwość prostej modyfikacji budowy, w znacznym stopniu przyczyniły się do rozwoju technik rozdzielania. W chromatografii gazowej fazy stacjonarne w postaci cieczy jonowych stanowią istotne uzupełnienie istniejących faz stacjonarnych na bazie polisiloksanów i glikolu polietylenowego. Ze względu na wysoką stabilność termiczną oraz wysoką polarność umożliwiają selektywne rozdzielenie szerokiej gamy związków. W chromatografii cieczowej, wykorzystywane są do modyfikacji faz ruchomych w celu tłumienia szkodliwych oddziaływań silanolowych, jak również do pokrywania krzemionkowych faz stacjonarnych dla zapewnienia wysokiej rozdzielczości badanych związków. W technikach elektroforetycznych ciecze jonowe stosuje się głównie jako dodatki do buforu podstawowego dla zwiększenia selektywności związków hydrofobowych.

  • Application of IT tools in Educational Project Dissemination – Example of the INNOCASE Project
    • Małgorzata Zięba
    2014

    The chapter presents innovative approaches (based on IT) to educational project dissemination. The appearance of the Internet and various tools based on it allowed using new methods and channels of getting to target groups and project beneficiaries. The chapter describes a great deal of dissemination means based on IT tools that are available to contemporary project manager of an educational project. These tools might be applied for the dissemination of a wide range of educational projects and better access to dissemination addressee. In the chapter, there are also presented the applications of selected IT tools for the purpose of the INNOCASE project dissemination. On this basis, conclusions and suggestions for other educational projects might be drawn.

  • Application of magnetic nanoparticles for magnetic solid-phase extraction in preparing biological, environmental and food samples
    • Marta Wierucka
    • Marek Biziuk
    2014 TRAC-TRENDS IN ANALYTICAL CHEMISTRY

    The need to obtain meaningful results as the basis for determining the content of trace amounts of analytes has become the driving force behind the development of modern analytical techniques, including sample-preparation techniques, such as solid-phase extraction (SPE). Recently, great interest was aroused in the use of magnetic nanoparticles (MNPs) in SPE. These materials exhibit high selectivity, and, in small amounts, can provide high recovery of analytes, even from large-volume samples. MNPs allow easy, rapid isolation of analytes using an external magnetic field. Simplicity in use, ease of surface modification and the versatility of MNPs mean that they are now widely used in many fields, including biotechnology, medicine and analytical chemistry. In magnetic SPE, these materials provide effective isolation and/or enrichment of the analytes, from samples with complex matrices (e.g. biological, environmental and food samples).

  • Application of Majority Voting Protocols to Supporting Trading Decisions
    • Artur Opaliński
    2014 Rynek Energii

    A broad spectrum of analysis and prediction indicators and methods exists to support trading decisions, but no hard knowledge exist to tell in advance which of them will fit best in a given timeframe. To support trading decisions, a multi-agent self-organizing system has been proposed. The system is based on history based dynamic weight voting and selects the right indicators based on their past performance. The formal analysis is given and verification is described, which proved the system to possess the desired features.

  • APPLICATION OF MAJORITY VOTING PROTOCOLS TO SUPPORTING TRADING DECISIONS
    • Artur Opaliński
    2014

    A broad spectrum of analysis and prediction indicators and methods exists to support trading decisions, but no hard knowledge exist to tell in advance which of them will fit best in a given timeframe. To support trading decisions, a multi-agent self-organizing system has been proposed. The system is based on history based dynamic weight voting and selects the right indicators based on their past performance. The formal analysis is given and verification is described, which proved the system to possess the desired features

  • Application of modern sample-preparation techniques to the determination of chloropropanols in food samples
    • Renata Marcinkowska
    • Agnieszka Głowacz-Różyńska
    • Magdalena Kupska
    • Justyna Gromadzka
    • Jacek Namieśnik
    2014 TRAC-TRENDS IN ANALYTICAL CHEMISTRY

    Chloropropanols are heat-induced food toxicants that recently caused concern among industrial and scientific experts. World and European organizations related to food safety asked researchers to investigate mitigation strategies regarding these contaminants. The essential objective of this project was development of fast analytical methods enabling reliable determination and quantification of 3-monochloropropane-1,2-diol, 2-monochloropropane-1,3-diol and 1,3-dichloropropanol. There are now several widely applied methods, which meet the requirements to some extent, but they involve a multi-step sample-preparation process, rather undesirable in routine analysis. The solution seems to be application of modern extraction techniques, especially combined with derivatization, which may lead to shortening and simplifying the whole procedure. We present the advantages of possible options for determination chloropropanols by summarizing methods already developed involving techniques such as solid-phase microextraction, magnetic solid-phase extraction, pressurized liquid extraction or dispersive liquid-liquid microextraction.

  • Application of multistage treatment wetlands as a buffer for effluent from Anammox treatment for reject water from centrifugation
    • Hanna Obarska-Pempkowiak
    • Magdalena Gajewska
    • Ewa Wojciechowska
    2014

    According to the newest knowledge concerning TW technology multistage treatment wetland could be easily applied for ensuring stable and low concentration of biogenic compounds form the effluent of SBR reactor (with nitritation/annamox process) for treatment of digested sludge dewatering in side stream. The working condition and optimising of such MTW will be the issue of carried out investigation.

  • Application of passive sampling technique in monitoring research on quality of atmospheric air in the area of Tczew, Poland.
    • Mariusz Marć
    • Bożena Zabiegała
    • Jacek Namieśnik
    2014 INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY

    This paper presents the results of atmospheric air quality research in Tczew (adjacent to the Vistula River) on the content of BTEX compounds. Analytical procedure applied during the sampling of the analytes from the air used the passive sampling technique (diffusive passive sampler, Radiello®). For determination of BTEX compounds in atmospheric air, two-stage thermal desorption technique combined with gas chromatography (TD-GC-FID) was applied. Research was conducted from March to December 2011. The annual average concentration of benzene, toluene, ethylbenzene and total xylenes determined in atmospheric air for the monitoring period were: 0.87 μg•m-3, 2.9 μg∙m-3, 1.3 μg∙m-3 and 5.9 μg∙m-3, respectively. In order to pre-identify potential sources of emissions of BTEX compounds, statistical analysis was carried out. This determined interactions between specified concentration levels of BTEX compounds in atmospheric air for the monitored area.

  • Application of PL-Grid Platform for Modeling of the Selected Acoustic Phenomena
    • Maciej Szczodrak
    • Józef Kotus
    • Andrzej Czyżewski
    • Bożena Kostek
    2014

    Domain grids are specific computational environments, developed within the PLGrid Plus project. For the Acoustic domain grid two supercomputer grid based services were prepared. Dedicated software consists of the outdoor sound propagation module and psychoacoustical noise dosimeter. The results are presented in a form of maps of sound level and Temporary Threshold Shift (TTS) values, therefore the services may play an informative role in the field of noise harmfulness.

  • APPLICATION OF QUANTITATIVE RISK ASSESSMENT TO SHIPS IN EMERGENCY CONDITIONS
    • Mirosław Gerigk
    • Piotr Szulczewski
    2014 Full text Journal of Polish CIMEEAC

    The paper is devoted to safety of ships in emergency conditions. The currently valid prescriptive method of safety assessment of ships in damage conditions is included in the SOLAS 2009 Part B-2 Ch.II-1 regulations. It is devoted to the design stage and difficult to apply in operation. A possible alternative described in this paper is a method based on assessment of performance of ships and risk assessment. Type of risk evaluation is the quantitive risk assessment. The matrix type risk model has beedn applied for estimation of risk and the measure of safety of ships level is based on the risk acceptance criteria from the risk matrix. After the risk assessment the method may be used for the safety management purposes using the risk control options.

  • Application of spatial neural simulators of turbine blade rows to fluid flow diagnostics
    • Anna Butterweck
    • Jerzy Głuch
    2014

    This chapter presents the results of neural modelling of fluid flow in steam turbine row. In modelling working conditions of the flow channel varied, thus the aim of the work was to reconstruct the reference state - distributions of velocity, pressure, and losses in flow channel - with high accuracy for fluid flow diagnostics.

  • Application of the Bodner-Partom constitutive equations for modelling of the technical fabric Valmex used for the hanging roof of the Forest Opera in Sopot
    • Krzysztof Żerdzicki
    • Paweł Kłosowski
    • Krzysztof Woźnica
    2014

    The study of an inelastic properties of the technical fabric Valmex used for 20 years as the roof structure of the Forest Opera in Sopot (Poland) is presented. The uniaxial tensile laboratory tests with constant strain rate have been conducted and analysed. Parameters of the Bodner-Partom constitutive model have been identified and verified by numerical simulations. Two approaches of the parameters identification have been proposed: one (simplified) for laboratory analysis and the other (extended) for numerical calculations of the shell structures covered with the technical fabrics. Both approaches have proved their correctness in the FEM analysis.

  • Application of the discrete Green's function-based antenna simulations for excitation of the total-field/scattered-field interface in the FDTD method
    • Tomasz Stefański
    2014 MICROWAVE AND OPTICAL TECHNOLOGY LETTERS

    In this article, the discrete Green's function formulation of the finite-difference time-domain (DGF-FDTD) method is proposed for simulation of wire antennas irradiating inhomogeneous dielectric scatterers. Surface equivalence theorem in the discrete domain is used to separate the problem into an inhomogeneous domain and a wire antenna that are simulated with the use of FDTD and DGF-FDTD, respectively. Then, the excitation of the total-field/scattered-field (TFSF) interface within the FDTD domain is computed as a convolution of antenna currents with DGF. Such a radiation is compatible with the grid and can excite the FDTD domain without the erroneous field leakage across the TFSF interface. The developed method is illustrated by canonical problems involving wire antennas that irradiate scatterers. If the DGF length is equal to the number of iterations in a simulation, the developed method perfectly introduces irradiation from wire antennas into the TFSF FDTD domain (assuming infinite numerical precision of computations).