Beata Czarczyńska-Goślińska, Agnieszka Zgoła‐Grześkowiak, Magdalena Jeszka‐Skowron, Robert Frankowski, Tomasz Grześkowiak,
Amounts of bisphenol A (BPA), 4-cumylphenol (CP) and 5 parabens – methylparaben (MP), ethylparaben (EP), propylparaben (PP), butylparaben (BP) and benzylparaben (BzP) in Greater Poland Voivodeship's surface waters are reported. The water samples were collected from selected 15 locations in 2015–2016 at seven different time points: in March, June, August, and October 2015 and March, June, and September 2016. MP was found in every tested sample with typical concentration at several dozen nanograms per liter ...
Tópico(s): Microplastics and Plastic Pollution
2017 - Elsevier BV | Journal of Environmental Management
Barbara Szymanik, Paweł Karol Frankowski, Tomasz Chady, Cyril Robinson Azariah John Chelliah,
The purpose of this paper is to present a multi-sensor approach to the detection and inspection of steel bars in reinforced concrete structures. In connection with our past experience related to non-destructive testing of different materials, we propose using two potentially effective methods: active infrared thermography with microwave excitation and the eddy current technique. In this article active infrared thermography with microwave excitation is analyzed both by numerical modeling and experiments. ...
Tópico(s): Structural Health Monitoring Techniques
2016 - Multidisciplinary Digital Publishing Institute | Sensors
Łukasz Wolski, Kalina Grzelak, Malwina Muńko, Marcin Frankowski, Tomasz Grzyb, Grzegorz Nowaczyk,
The aim of this study was to provide deep insight into photocatalytic degradation of ciprofloxacin (CIP) over CeO2/ZnO nanocomposites. Catalysts used in this work were synthesized by a simple co-precipitation method and fully characterized by means of XRD, nitrogen physisorption, TEM, UV–vis, PL and XPS. Degradation of CIP was tracked by UV–vis and LC-MS techniques and the mineralization efficiency was determined by TOC analyses. It was documented that CeO2/ZnO nanocomposites were ca. twice more ...
Tópico(s): Nanomaterials for catalytic reactions
2021 - Elsevier BV | Applied Surface Science
Tadeusz Gajda, Łukasz Janczewski, Anna Gajda, Sebastian Frankowski, Tomasz M. Goszczyński,
A number of alkyl, aryl and bifunctional isothiocyanates are obtained in moderate to high yields (41–94%) in a two-step, one-pot reaction of the parent primary amines or their salts with carbon disulfide, followed by reaction of the thus formed dithiocarbamates with T3P® (propane phosphonic acid anhydride) as a new and efficient desulfurating agent.
Tópico(s): Chemical Synthesis and Reactions
2017 - Thieme Medical Publishers (Germany) | Synthesis
Robert Frankowski, Tomasz Grześkowiak, Beata Czarczyńska-Goślińska, Agnieszka Zgoła‐Grześkowiak,
Raw cow's milk collected from farmers and processed cow's milk purchased from local grocery stores were analysed for the presence of six bisphenols (bisphenol A, bisphenol S, bisphenol F, bisphenol AF, bisphenol B, and bisphenol E) and five parabens (methylparaben, ethylparaben, propylparaben, butylparaben, and benzylparaben). The analytes were determined in their unconjugated form and (after enzymatic deconjugation) as the sum of conjugated and unconjugated compounds. The results show the presence ...
Tópico(s): Microplastics and Plastic Pollution
2021 - Taylor & Francis | Food Additives & Contaminants Part A
Paweł Karol Frankowski, Tomasz Chady, A. Zieliński,
This paper aims to introduce a new nondestructive method dedicated to rebar concrete debonding detection (which may be caused by corrosion). The Magnetic Force Induced Vibration Evaluation (M5) method is designed to reduce damping (one of the biggest problems of currently known modal analysis methods) and enables evaluating elements inaccessible to traditional methods. The method's concept is to directly induce rebars' vibrations (not a whole structure), measure them, and analyze the frequency spectrum ...
Tópico(s): Structural Health Monitoring Techniques
2021 - Elsevier BV | Measurement
Justyna Werner, Robert Frankowski, Tomasz Grześkowiak, Agnieszka Zgoła‐Grześkowiak,
For years, scientists have been trying to develop sustainable, environmentally friendly methods of extraction and determination of trace environmental pollutants that take into account the principles of Green Analytical Chemistry (GAC). It is important to save energy and time, minimize and automate individual stages of sample preparation for determination, and significantly reduce or completely eliminate harmful wastes and solvents from the analytical procedure. Therefore, there is continuous development ...
Tópico(s): Advanced Chemical Sensor Technologies
2024 - Elsevier BV | TrAC Trends in Analytical Chemistry
Justyna Werner, Tomasz Rębiś, Robert Frankowski, Tomasz Grześkowiak, Agnieszka Zgoła‐Grześkowiak,
Parabens are widely used as antimicrobial preservatives in cosmetic products and pharmaceuticals. Therefore, their presence in the environment is considered to be serious and their determination is important. This paper reports the development and validation of a new method based on solid-phase microextraction (SPME) and high-performance liquid chromatography – tandem mass spectrometry (HPLC-MS/MS) for the simultaneous determination of five parabens (methylparaben (MP), ethylparaben (EP), propylparaben ( ...
Tópico(s): Advanced Chemical Sensor Technologies
2021 - Taylor & Francis | Analytical Letters
Justyna Werner, Robert Frankowski, Tomasz Grześkowiak, Agnieszka Zgoła‐Grześkowiak,
Recent studies show that the weight loss process may be supported by compounds isolated from plants. Capsaicinoids, primarily capsaicin and dihydrocapsaicin, are the active alkaloids from chili peppers, which have been classified into this group of compounds and are widely used in dietary supplements. Due to the mild legal regulations being in force in the European Union regarding dietary supplements, concentrations of capsaicin and dihydrocapsaicin have been tested in six local products. The optimization ...
Tópico(s): Phytochemicals and Antioxidant Activities
2021 - Taylor & Francis | Analytical Letters
Paweł Karol Frankowski, Tomasz Chady,
The magnetic method is the most promising method that can be used to inspect large areas of reinforced concrete (RC) structures. Magnetization is a crucial process in this method. The paper aims to present the impact of the magnetization method on the results in the detection of reinforced bars (rebars) and the evaluation of concrete cover thickness in reinforced concrete (RC) structures. Three cases (without magnetization, same pole magnetization, and opposite pole magnetization) were considered in ...
Tópico(s): Geophysical and Geoelectrical Methods
2022 - Multidisciplinary Digital Publishing Institute | Materials
Paweł Karol Frankowski, Tomasz Chady,
The magnetic method is one of the very few nondestructive testing (NDT) techniques that provide the possibility to conduct area tests of reinforced concrete (RC) structures in a fast, cheap, and straightforward way. This paper aims to present a new approach to the simultaneous identification of rebars’ diameter, alloy class, and thickness of the concrete cover tested with this method. Since rebars from different manufacturers may have different electromagnetic properties (standardization only for mechanical ...
Tópico(s): Ultrasonics and Acoustic Wave Propagation
2023 - Multidisciplinary Digital Publishing Institute | Materials
Julia Płatkiewicz, Robert Frankowski, Tomasz Grześkowiak, Ewa Stanisz, Agnieszka Zgoła‐Grześkowiak,
Many impurities, due to their incomplete biodegradation in wastewater treatment plants, are often detected in surface waters. Bisphenol A, bisphenol S, and fluconazole are the examples used in the present study to show an alternative approach to degradation using UV-activated persulfate, allowing for fast removal of the tested compounds within minutes with no significant reduction in efficiency in a wide pH range. Although the first steps of the process led to degradation products of similar toxicity, ...
Tópico(s): Wastewater Treatment and Reuse
2023 - Elsevier BV | Journal of environmental chemical engineering
Paweł Karol Frankowski, R. Sikora, Tomasz Chady,
The aim of this paper is to present an expert system for identification of the basic reinforcement concrete structures parameters like: rebars diameter, thickness of a concrete cover and a kind of rebar's alloy (class). The results of measurement carried out by the eddy current transducers were utilized for the designed system. Measured waveforms are represented by two kinds of attributes, the d-factors represent a waveform shape, and a maximal amplitude. In order to extract an association rules ...
Tópico(s): Infrastructure Maintenance and Monitoring
2016 - American Institute of Physics | AIP conference proceedings
Magdalena Jeszka‐Skowron, Agnieszka Zgoła‐Grześkowiak, Robert Frankowski, Tomasz Grześkowiak, Anna Maria Jeszka,
Nettle is a common plant that offers many health benefits and is grown all over the world. The content of active compounds in roots, stems, and leaves was determined based on the extraction procedure optimized using the Central Composite Design. Flavonols, phenolic acids, trigonelline, nicotinamide, nicotinic acids, and short-chain organic acids were determined with the use of LC-MS/MS and capillary isotachophoresis. Trigonelline, which was not previously reported in the roots and stems of nettle, ...
Tópico(s): Botany and Plant Ecology Studies
2022 - Multidisciplinary Digital Publishing Institute | Molecules
Robert Frankowski, Agnieszka Zgoła‐Grześkowiak, Tomasz Grześkowiak, Krzysztof Sójka,
Bisphenol A (BPA) is used as a color developer in a thermal paper that after a heating process reacts with a leuco dye and changes it to a colored form. Receipts from cash registers are considered as the main source of consumer exposure to bisphenols together with polycarbonates and epoxy resins. Levels of BPA and its possible alternatives were determined in thermal paper samples collected between May 2018 and May 2019 in 22 European and 17 non-European countries on all inhabited continents (220 samples ...
Tópico(s): Recycling and Waste Management Techniques
2020 - Elsevier BV | Environmental Pollution
Robert Frankowski, Julia Płatkiewicz, Ewa Stanisz, Tomasz Grześkowiak, Agnieszka Zgoła‐Grześkowiak,
Bisphenol A, bisphenol S, and fluconazole are ubiquitous environmental pollutants and their removal from water is of utmost importance. As the biodegradation of these compounds is usually not enough effective, often other degradation methods are required. The study presents the difference between biodegradation and photo-Fenton degradation with a much higher efficiency obtained in the latter process. Levels of biodegradation and chemical degradation were assessed based on high-performance liquid ...
Tópico(s): Microplastics and Plastic Pollution
2021 - Elsevier BV | Environmental Pollution
Paweł Karol Frankowski, Tomasz Chady, R. Sikora,
The purpose of this paper is to present knowledge extraction algorithms, dedicated for new electromagnetic system used to evaluate steel bars in reinforced concrete structures. All stages of the rebar identification process have been presented. At the first step, relations between parameters of the tested structure and measured waveform are extracted. For this purpose, a dedicated association rules learning algorithm is proposed. In the next stage, the collected data are filtered and smoothed. Finally, ...
Tópico(s): Ultrasonics and Acoustic Wave Propagation
2014 - American Institute of Physics | AIP conference proceedings
Robert Frankowski, Tomasz Rębiś, Justyna Werner, Tomasz Grześkowiak, Agnieszka Zgoła‐Grześkowiak,
A new procedure using poly(3,4-ethylenedioxythiophene)/lignosulfonate electropolymerized sorbent solid-phase microextraction (PEDOT/LS-SPME) combined with LC-MS/MS for determination of bisphenols in environmental water samples was developed.
Tópico(s): Pharmaceutical and Antibiotic Environmental Impacts
2020 - Royal Society of Chemistry | Analytical Methods
Piotr Szyczewski, Marcin Frankowski, Anetta Zioła-Frankowska, J. Siepak, Tomasz Szyczewski, P. Piotrowski,
Abstract Vegetable oils belong to a large group of substances consumed on a daily basis. World vegetable oil production is soaring, reducing the popularity of animal fats. Heavy metals pose a threat to human health. It is estimated that about 80% of the daily dose of heavy metals enters the human body through the consumption of food. Hence, it is necessary to monitor their concentrations in food products. Besides, the presence of heavy metals is thought to have possible negative influence on the ...
Tópico(s): Biodiesel Production and Applications
2016 - De Gruyter Open | Archives of Environmental Protection
Robert Frankowski, Agnieszka Zgoła‐Grześkowiak, Wojciech Smułek, Tomasz Grześkowiak,
Abstract The possibility of removing bisphenol A and its five potential substitutes (bisphenols S, F, AF, E, and B) was tested using microorganism consortia from river water and activated sludge from municipal and rural wastewater treatment plants. For most bisphenols, biodegradation with activated sludge was faster than with river water and a greater extent of biodegradation was also achieved. However, only bisphenol A and bisphenol F underwent 100% primary biodegradation while other bisphenols ...
Tópico(s): Chemistry and Chemical Engineering
2020 - Springer Science+Business Media | Applied Biochemistry and Biotechnology
Justyna Werner, Agnieszka Zgoła‐Grześkowiak, Tomasz Grześkowiak, Robert Frankowski,
The main direction of the development of analytical chemistry is the constant pursuit of simplification, shortening and the introduction of ecological solutions to each stage of analytical procedures. For years, extractants/sorbents based on natural compounds have been very popular, which is in line with the recent trend of using green analytical chemistry. This review will discuss the usage of biopolymers such as chitosan, agarose, alginate, cellulose, starch and cyclodextrin in various solid-phase ( ...
Tópico(s): Extraction and Separation Processes
2024 - Elsevier BV | TrAC Trends in Analytical Chemistry
Beata Czarczyńska-Goślińska, Tomasz Grześkowiak, Robert Frankowski, Janina Lulek, Jan Pieczak, Agnieszka Zgoła‐Grześkowiak,
A liquid chromatography-tandem mass spectrometry analytical method was developed for the simultaneous determination of five parabens and four bisphenols in human breast milk samples in both free forms and as the total concentration, which included also conjugated compounds. The samples for the determination of free forms were extracted directly using the QuEChERS method, while the determination of the total content included a preliminary enzymatic hydrolysis step. Breast milk was sampled 3-6 weeks ...
Tópico(s): Toxic Organic Pollutants Impact
2021 - Elsevier BV | Journal of Food Composition and Analysis
Paweł Karol Frankowski, Tomasz Chady,
This work presents how significantly the proper selection of the magnetization method can improve almost all parameters of the magnetic method and affect the effectiveness of the evaluation of reinforced concrete (RC) structures. Three magnetization methods are considered in this paper: opposite pole magnetization (typical solution), same pole magnetization, and (as a reference point) no magnetization. The experiments are carried out in a three-dimensional (XYZ) space. Measurements along each of the ...
Tópico(s): Geophysical and Geoelectrical Methods
2023 - Multidisciplinary Digital Publishing Institute | Materials
Tomasz Chady, Paweł Karol Frankowski,
The purpose of this paper is to present the new electromagnetic system for detection and evaluation of steel bars in reinforced concrete structures. A differential eddy current transducers and system with lock-in amplifier are proposed for this purpose. Studies show that, the shape of output voltage module signal provides information about main parameters of reinforcement. Selected Data Mining algorithms are used to search associations between output waveform and diameter, location and steel class ...
Tópico(s): Ultrasonics and Acoustic Wave Propagation
2013 - American Institute of Physics | AIP conference proceedings
Robert Frankowski, Agnieszka Zgoła‐Grześkowiak, Tomasz Grześkowiak, Ewa Stanisz, Justyna Werner, Julia Płatkiewicz,
Bisphenol A, bisphenol S, and fluconazole are environmental contaminants widely found in surface waters because of their extensive usage and low biodegradability. Therefore, other methods are often considered for the removal of these compounds. The present study aims at their photodegradation with the use of UV light and three different catalysts, ZnO, TiO2, and Ag-TiO2. The results obtained show that photocatalytic removal of these compounds is also problematic and the use of catalysts, such as ...
Tópico(s): Chemistry and Chemical Engineering
2022 - Multidisciplinary Digital Publishing Institute | Processes
Barbara Szymanik, Tomasz Chady, Paweł Karol Frankowski,
In this article the reinforced concrete non-destructive evaluation using active thermography is discussed. There are several aspects of possible non-destructive testing of mentioned structures. One of them is the detection and assessment of the reinforcement itself. In case of active thermography, the external energy source has to be used to induce the thermal response of the inspected specimen. Here, authors propose two different techniques: microwave heating and induction heating. In this article ...
Tópico(s): Fire effects on concrete materials
2017 - American Institute of Physics | AIP conference proceedings
Frankowski Gerard, Jerzak Marcin, M. Sc. Smolarczyk Maciej, Tomasz Nowak, Pawłowski Marek,
Protection of infrastructures for e-science, including grid environments and NREN facilities, requires the use of novel techniques for anomaly detection and network monitoring. The aim is to raise situational awareness and provide early warning capabilities. The main operational problem that most network operators face is integrating and processing data from multiple sensors and systems placed at critical points of the infrastructure. From a scientific point of view, there is a need for the efficient ...
Tópico(s): Anomaly Detection Techniques and Applications
2015 - Wydawnictwa AGH | Computer Science
Rafał Krakowiak, Robert Frankowski, Kinga Mylkie, Michał Kotkowiak, Dariusz T. Mlynarczyk, Alina Dudkowiak, Beata Stanisz, Agnieszka Zgoła‐Grześkowiak, Marta Ziegler-Borowska, Tomasz Gośliński,
Hybrid materials based on nanometric size bare anatase titanium(IV) oxide and meso-functionalized porphyrins were obtained and subsequently characterized in terms of surface morphology with SEM, HR-TEM, nanoparticle size with NTA, crystallinity with XRD and chemical composition with UV-DRS, ATR-FTIR, TGA and Raman spectroscopy. Prepared nanoparticles were studied in photocatalytic degradation of ibuprofen which is an example of an emerging contaminant from the area of pharmaceuticals. During photocatalytic ...
Tópico(s): TiO2 Photocatalysis and Solar Cells
2022 - Elsevier BV | Journal of environmental chemical engineering
Joanna Musiał, Rafał Krakowiak, Robert Frankowski, Marcin Spychała, Jolanta Długaszewska, Bernadeta Dobosz, Wioletta Bendzińska‐Berus, Ryszard Krzyminiewski, Ewa Tykarska, Agnieszka Zgoła‐Grześkowiak, Tomasz Gośliński, Dariusz T. Mlynarczyk, Beata Stanisz,
Titanium dioxide is extensively researched due to its interesting photoactive properties. One of such is photocatalysis and potential use in photoremediation. New photocatalysts based on titania and metallated phthalocyanines potentially suitable for photodecomposition of environmental pollutants were developed in the presented work. The obtained materials were characterized using various techniques, such as thermogravimetric analysis, X-ray powder diffraction, particle size analysis, electron spin ...
Tópico(s): Advanced oxidation water treatment
2021 - Elsevier BV | Materials Science and Engineering B
Piotr Szyczewski, Marcin Frankowski, Anetta Zioła-Frankowska, J. Siepak, Tomasz Szyczewski, Paweł Piotrowski,
Vegetable oils belong to a large group of substances obtained from plants.They can be extracted from corn, olives, rape, or sunflower.The procedures of sample preparation applied at present are based on the ICP-AES and ETAAS techniques, which comply with the heavy metal determination norm, are time-consuming, and require large amounts of chemical reagents -including organic solvents.The stage of preparation of vegetable oil samples for chemical analysis causes difficulties related to the extraction ...
Tópico(s): Heavy Metals in Plants
2015 - HARD Publishing Company | Polish Journal of Environmental Studies