Search results for: REJECT WATER.

• Investigation of oleophilic nature of straw sorbent conditioned in water.

  Publication

  • E. Witka-Jeżewska
  • J. Hupka
  • P. A. Pieniążek

  - SPILL SCIENCE & TECHNOLOGY BULLETIN - Year 2003

  Przedyskutowany został potencjał absorpcyjny słomy jęczmiennej kondycjonowanej w wodzie. W odniesieniu do właściwości powierzchni zewnętrznej oraz wewnętrznej łodygi i liści zostały zmierzone kąty zwilżania dla wody i dekanu zarówno dla słomy suchej, jak i mokrej.

• Desalination of thermally softened water by membrane distillation process

  Publication

  • M. M. Gryta

  - DESALINATION - Year 2010

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• Membrane Distillation of Saline Water Contaminated with Oil and Surfactants

  Publication

  • W. Tomczak
  • M. M. Gryta

  - Membranes - Year 2021

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• A new magnetic-hybrid photoreactor for photocatalytic water disinfection

  Publication

  • O. Paszkiewicz
  • K. Wang
  • M. Kordas
  • R. Rakoczy
  • E. Kowalska
  • A. B. Markowska-Szczupak

  - Chemical and Process Engineering - Year 2023

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• Application of membrane distillation process for tap water purification

  Publication

  • M. M. Gryta

  - Membrane Water Treatment - Year 2010

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• Demineralization of water using a combination of MD and NF(RO)

  Publication

  • M. M. Gryta
  • K. Karakulski
  • M. Tomaszewska
  • W. Morawski

  - DESALINATION - Year 2006

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• Membrane processes used for potable water quality improvement

  Publication

  • K. Karakulski
  • M. M. Gryta
  • A. Morawski

  - DESALINATION - Year 2002

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• Production of process water using integrated membrane processes

  Publication

  • K. Karakulski
  • M. Gryta
  • M. Sasim
  • M. Gryta

  - Chemical Papers - Year 2006

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• The application of membrane distillation for the concentration of oil-water emulsions

  Publication

  • M. Gryta
  • K. Karakulski
  • M. Gryta

  - DESALINATION - Year 1999

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• The influence of the local pipeline leak on water hammer properties

  Publication

  • A. Kodura
  • K. Weinerowska-Bords

  - Year 2007

  Przedstawiono wyniki eksperymentalnej i numerycznej analizy zjawiska uderzenia hydraulicznego. Pomiary przeprowadzono dla przewodu MDPE o długości 36 m, w którym zamodelowano lokalną nieszczelność. W tym celu, w pewnej odległości od zaworu umieszczonego na końcu przewodu zainstalowano kształtki imitujące lokalny wyciek. Przeprowadzono analizę otrzymanych charakterystyk ciśnienia i wyznaczono parametry: okres oscylacji, amplitudę...

• Research work on water lubricated polymer hydrodynamic bearings.

  Publication

  • W. Litwin

  - Year 2004

  W pierwszej części artykułu w skrócie omówiono stanowisko badawcze na którym przeprowadzono eksperyment. W drugiej części opisano symulowane warunki pracy łożyska i zaprezentowano wyniki badań. Z przeprowadzonej analizy rezultatów wynika, że jest możliwe uzyskania tarcia płynnego w okrętowym łożysku wału śrubowego z polimerową panwią smarowanym wodą.

• Monitoring and diagnosis of quality and quantity in drinking water systems.

  Publication

  • M. Szpilewski
  • M. Brdyś

  - Year 2004

  Artykuł przedstawia nowe podejście do inteligentnego monitorowania oraz diagnostyki Systemu Wodnego (WS) jako problem statusu, warunków operacyjnych oraz rozpoznawania zdarzeń. Oprogramowanie komputerowego systemu monitorowania i diagnostyki zawiera narzędzia dla identyfikacji modeli dyskretnych statusów oraz określenia parametrów ilości i jakości wody dla każdego statusu. Dla każdego stanu decyzje podejmowane są przy użyciu metody...

• Open water experiments with two pod propulsor models.

  Publication

  • M. Grygorowicz
  • J. Szantyr

  - Year 2004

  Referat przedstawia obszerne eksperymenty hydromechaniczne z dwoma modelami pędników podowych. Jeden z nich jest pędnikiem pchającym o średnicy 0,32 m, drugi pędnikiem ciągnącym o średnicy 0,25 m. W trakcie pomiarów ustalono przebieg sześciu składowych siły i momentu hydrodynamicznego dla szerokiego zakresu zmian współczynnika posuwu i kąta dryfu.

• Densimetric and ultrasonic characterization of urea and its derivatives in water

  Publication

  • J. Krakowiak
  • J. Wawer
  • A. Panuszko

  - JOURNAL OF CHEMICAL THERMODYNAMICS - Year 2012

  W oparciu o pomiary gęstości dla serii roztworów jak i rozpuszczalnika wykonanych w temperaturach 15, 20, 25, 30 i 35oC wyznaczono pozorne molowe objętości mocznika, N-metylomocznika, N,N'-dimetylomocznika, N,N,N',N'-tetrametylomocznika, N-etylomocznika, N,N'-dietylomocznika jak i N-butylomocznika w wodzie. Dodatkowe pomiary szybkości dźwięku przeprowadzone w temperaturze 25oC pozwoliły obliczyć ściśliwości adiabatyczne, pozorne...

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• Enhancement of the Brayton cycle efficiency by water or steam utilization

  Publication

  • K. Jesionek
  • A. Chrzczonowski
  • P. Ziółkowski
  • J. Badur

  - Transactions of the Institute of Fluid-Flow Machinery - Year 2013

  In the paper, thermodynamic analysis of two modifications of a Brayton cycle into enhancement cycles with water/steam injection are discussed. The first one deals with a STIG modified system with both interstage compressed air cooling and air heating (heat regeneration) before combustion chamber. The second one, mainly devoted to higher steam/air ratio, is connected with separate steam production in a HRSG. The analysis has been...

• Detection of Water on Road Surface with Acoustic Vector Sensor

  Publication

  • J. Kotus
  • G. Szwoch

  - SENSORS - Year 2023

  This paper presents a new approach to detecting the presence of water on a road surface, employing an acoustic vector sensor. The proposed method is based on sound intensity analysis in the frequency domain. Acoustic events, representing road vehicles, are detected in the sound intensity signals. The direction of the incoming sound is calculated for the individual spectral components of the intensity signal, and the components...

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• Peroxymonosulfate-assisted photocatalytic degradation of artificial sweeteners in water

  Publication

  • J. Smoliński
  • A. F. Borzyszkowska
  • P. Kubica
  • A. Zielińska-Jurek

  - Chemical and Process Engineering : New Frontiers - Year 2023

  In the present study, peroxymonosulfate (PMS) activation was proposed for efficient photocatalytic degradation of aspartame, acesulfame, saccharin, and cyclamate - artificial sweeteners frequently present in wastewaters and surface waters worldwide. The TiO2 nanosheets with exposed {0 0 1} facets were synthesised using the fluorine-free lyophilisation technique as a green concept for the synthesis and used for the photodegradation...

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• Elastic scattering of electrons by water: An ab initio study

  Publication

  • F. Triggiani
  • T. Morresi
  • S. Taioli
  • S. Simonucci

  - Frontiers in Materials - Year 2023

  In this work we devise a theoretical and computational method to compute the elastic scattering of electrons from a non-spherical potential, such as in the case of molecules and molecular aggregates. Its main feature is represented by the ability of calculating accurate wave functions for continuum states of polycentric systems via the solution of the Lippmann-Schwinger equation, including both the correlation effects and multi-scattering...

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• A tool for designing water tanks for measuring hydroacoustic transducers

  Publication

  • R. Salamon
  • J. Marszal
  • I. Kochańska

  - Vibrations in Physical Systems - Year 2024

  Special water tanks are commonly used to measure the parameters of underwater acoustic systems. They must meet specific requirements, the fulfilment of which ensures very small but acceptable measurement errors. These requirements define the size of the tank and its shape as well as the strong attenuation of reflected waves. At the design stage, it is necessary to determine the impact of the tank structure on the measurement errors...

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• Research on causes of corrosion in the municipal water supply system

  Publication

  • J. Orlikowski
  • A. Zieliński
  • K. Darowicki
  • S. Krakowiak
  • K. Żakowski
  • P. Ślepski
  • A. Jażdżewska
  • M. Gruszka
  • J. Banas

  - Case Studies in Construction Materials - Year 2016

  This paper presents results of failure analysis study to characterize the corrosion damage that occurred in the water supply system in Krakow. This analysis includes: electrochemical noise, linear polarization and resistometric measurements. Water aggressiveness of four water intakes was defined using Langelier and Ryznar indices. Results from this indices did not reveal the causes of considerable corrosion losses in water systems....

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• Review of the determination of modern used pesticides in water samples

  Publication

  • M. Tankiewicz
  • J. Fenik
  • M. Biziuk

  - Year 2011

  The increasingly widespread application of pesticides causes that larger amounts of them are entering the environment. Their presence in sources of drinking water, essential to life, is a particular danger. For these reasons it is important to monitor and analyse pesticide residues in the environment. The analysis of environmental samples for the presence of pesticides is very difficult. Firstly, the processes involved in sample...

• POLDER AND CITY: SUSTAINING WATER LANDSCAPES ON AN URBAN EDGE

  Publication

  • L. Nyka

  - Year 2016

  The question investigated in this paper is how to maintain the environmental quality of the polder landscape encompassing the city in the condition of urban pressure on this landscape. On the basis of theoretical approaches, historical surveys and introductory study models new ideas are tested on the case study of Gdansk, a city located in the Vistula River delta in northern Poland. Research shows that the city was created as a...

• Simplified method of water cooled exhaust system design.

  Publication

  • C. Dymarski
  • M. Narewski

  - Journal of Polish CIMEEAC - Year 2016

  The water cooled exhaust systems are not often used onboard ships. Prime goal is to lower temperature of exhaust gas from main propulsion and auxiliary engines to the defined limit. The design of such systems require detailed analysis of propulsion system operational parameters to meet designer expectations. The paper outlines the cooled exhaust system design problems in specific application. The simplified method of evaluation...

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• Contamination of water in Oliwski Stream after the flood in 2016

  Publication

  • K. Matej-Łukowicz
  • E. Wojciechowska

  - Year 2017

  In the article pollution of stream waters with surface runoff from an urbanized area caused by an extremely high rainfall is discussed. The analyzes were carried out after the rainfall of the depth 152 mm which took place in Gdańsk on 14th and 15th July 2016. This extreme rainfall caused urban flooding, damage of several retention ponds and pollution of surface waters. In the article the results of physical and chemical analyzes...

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• An Experimental and Numerical Analysis of Water Hammer Phenomenon in Slurries

  Publication

  • A. Kodura
  • P. Stefanek
  • K. Weinerowska-Bords

  - JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME - Year 2017

  The analysis of slurry transportation in pressure pipelines is important both from practical and theoretical point of view. Due to the nature of the medium, the number of problems arising in the course of design, operation, measurements and mathematical modeling is much higher compared to the cases where the flowing liquid is homogeneous. The equations describing the flow are more complex, and higher number of the parameters is...

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• Theoretical Model of Acoustic Wave Propagation in Shallow Water

  Publication

  • E. Kozaczka
  • G. Grelowska

  - Polish Maritime Research - Year 2017

  The work is devoted to the propagation of low frequency waves in a shallow sea. As a source of acoustic waves, underwater disturbances generated by ships were adopted. A specific feature of the propagation of acoustic waves in shallow water is the proximity of boundaries of the limiting media characterised by different impedance properties, which affects the acoustic field coming from a source situated in the water layer “ deformed”...

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• Implementation of Hierarchical Control of Drinking Water Supply System

  Publication

  • T. A. Rutkowski
  • J. Tarnawski
  • A. Cimiński

  - Year 2017

  The paper presents the outline of the didactical project of a complex computer controlled system realized by the first degree students of the Automatics and Robotics on the Faculty of Electrical and Control Engineering (FoEaCE) in Gdansk University of Technology (GUT). The synthesis, implementation and analysis of a multilayer hierarchical control system for drinking water supply system (DWSS) are main topics of that project. The...

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• Computer simulation of detonation of shaped charge in sea water

  Publication

  • L. Rowiński
  • K. Jach
  • B. Porala
  • R. Świerczyński

  - Year 2012

  Artykuł zawiera opis systemu przeciwnimowego Głuptak, koncentrując się na opisie działania ładunku kumulacyjnego do niszczenia min morskich. Opisano sposób formowania wiązki plazmy uderzającej w obudowę miny po zdetonowaniu opisywanego ładunku kształtowego. Zaprezentowano obraz symulacyjny i zdjęcia poklatkowe penetracji plazmy w obiekcie niszczonym.

• Water sorption and blistering of GFRP laminates with varying structures

  Publication

  • M. Landowski
  • M. Budzik
  • K. Imielińska

  - Advances in Materials Science - Year 2012

  The microstructures, water absorption as well as blistering was studied for bi- and tri- axial glass fibre vinyl ester and polyester -matrix laminates coated with gel coat layer and uncoated. The effect of manufacturing technique on water sorption characteristics was considered. It was found that water sorption characteristics of GFRP depend on manufacturing methods. The least water intake was found for specimens having perfect...

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• Sampling Procedures in Studies of Cloud Water Composition: A Review

  Publication

  • P. Roman
  • Ż. Polkowska
  • J. Namieśnik

  - CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY - Year 2013

  The authors set out and classify the principles of operation of known types of cloud water collectors, and critically review their advantages and drawbacks. Analysis of the literature has yielded information on the parameters of various type of collectors—sampling time, the type of cloud from which the water sample was taken, droplet diameter collected with 50% efficiency (cut off), sample analytes/ parameters determined, types...

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• The Effect of Water and Frost on Fatigue Life of Asphalt Concrete

  Publication

  • P. Jaskuła
  • J. Judycki

  - Year 2014

  This paper presents testing of fatigue life of asphalt concrete that has been subjected to action of water and frost. Simulation of water and frost action was based on the original AASHTO T283 method and its modification. The original method was modified in such a way that instead of a single freeze-thaw cycle, 50 and 150 cycles were applied. Fatigue life was measured in the indirect tensile fatigue test in the Nottingham asphalt...

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• Cullet As Filter Medium For Swimming Pool Water Treatment

  Publication

  • A. Grabowiec
  • A. Małachowska
  • A. Hänel
  • M. Niewiadomski
  • J. Hupka

  - Physicochemical Problems of Mineral Processing - Year 2012

  Kontrola jakości wody w basenach kąpielowych może być prowadzona poprzez oczyszczanie wody z uwzględnieniem filtracji i dodawaniemśrodków dezynfekcyjnych. Zanieczyszczenia wody nie zawsze mogą byćskutecznie usuwane przy stosowaniu konwencjonalnych metod uzdatnianiawody. W doświadczeniu zbadano osady powstałe na złożu piaskowym,stwierdzono nieefektywną pracę filtrów piaskowych. Porównano dwazłoża filtracyjne: piasek kwarcowy i...

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• Water uptake analysis of acceptor-doped lanthanum orthoniobates

  Publication

  • A. D. Mielewczyk-Gryń
  • S. L. Wachowski
  • M. Prześniak-Welenc
  • K. Dzierzgowski
  • A. Regoutz
  • D. J. Payne
  • M. Gazda

  - JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY - Year 2019

  In this work, lanthanum orthoniobates doped with either antimony, calcium, or both have been synthesized and studied. The water uptake of the investigated materials has been analyzed by means of thermogravimetric studies. The results show the difference between the thermodynamics of hydration between the lanthanum orthoniobate system and other proton conducting ceramics. The relation between the water uptake and effective acceptor...

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• Hydro Lubricants: Water-based lubricants for hydropower applications

  Publication

  • W. Litwin
  • V. Balasubramaniam
  • E. von Hoersten
  • S. Martin
  • K. Marius

  - Year 2018

  Several different base oil types exist in the market including mineral and synthetic oils (e.g. polyalphaolefins, ester, polyglycol, etc.) and are currently widely in use. Although synthetic oils have drawn great attention over the past few decades in terms of their tribological benefits, mineral oils are still widely used in hydropower applications due primarily to their low cost and easy miscibility with other oils. However,...

• COLD CRACKING OF S460N STEEL WELDED IN WATER ENVIRONMENT

  Publication

  • J. Tomków
  • J. Łabanowski
  • D. Fydrych
  • G. Rogalski

  - Polish Maritime Research - Year 2018

  This paper shows results of weldability testing of fine-grained high -strength low- alloy S460N steel welded in water environment by covered electrodes. The tests were carried out by using the CTS test specimens with fillet welds. Four specimens were welded under water and one specimen in air. Welded joints were subjected to non-destructive visual and penetration tests. The accepted joints were then subjected to macroscopic and...

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• Origin and fate of nanoparticles in marine water – Preliminary results

  Publication

  • B. Graca
  • A. Zgrundo
  • D. Zakrzewska
  • M. Rzodkiewicz
  • J. Karczewski

  - CHEMOSPHERE - Year 2018

  The number, morphology and elemental composition of nanoparticles (<100 nm) in marine water was investigated using Variable Pressure Scanning Electron Microscopy (VP-SEM) and Energy-dispersive X-ray spectroscopy (EDS). Preliminary research conducted in the Baltic Sea showed that the number of nanoparticles in seawater varied from undetectable to 380 (x102) cm-3. Wind mixing and density barriers (thermocline) had a significant impact...

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• The role of water in deep eutectic solvent-base extraction

  Publication

  • M. Vilková
  • J. Płotka-Wasylka
  • V. Andruch

  - JOURNAL OF MOLECULAR LIQUIDS - Year 2020

  Deep eutectic solvents (DESs) are currently being used in different sectors, such as electrochemistry, electrodeposition, organic synthesis, nanoparticle preparation, bioactive compound separation, etc. Their use in analytical chemistry has only recently begun to expand. Despite the publication of a sufficient number of DES-based analytical extraction procedures, some details, such as interaction of DESwith the sample and target...

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• Shallow Water Experiment of OFDM Underwater Acoustic Communications

  Publication

  • I. Kochańska
  • J. Schmidt
  • J. Marszal

  - Archives of Acoustics - Year 2020

  The large variability of communication properties of underwater acoustic channels, and especially the strongly varying instantaneous conditions in shallow waters, is a challenge for the designers of underwater acoustic communication (UAC) systems. The use of phase modulated signals does not allow reliable data transmission through such a tough communication channel. However, orthogonal frequency-division multiplexing (OFDM), being...

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• RECENT PROGRESS IN HORMONE RESEARCH

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