Tytuł: Folic Acid/Methotrexate Functionalized Mesoporous Silica Nanoflakes from Different Supports: Comparative Study

Autor/Autorzy: Martyna Trukawka, Krzysztof Cendrowski, Wojciech Konicki, Ewa Mijowska

Miejsce publikacji: Applied Sciences-Basel

Rok: 2020

Słowa kluczowe: anticancer drugs, drug carrier, folic acid/methotrexate, multifunctional drugs, silica flakes, targeted therapy

Abstrakt: Herein, we present a facile synthesis route for the mesoporous silica nanoflakes on two types of templates and evaluate their potential as potential drug delivery systems. Silica materials are attractive due to their biocompatibility, low cytotoxicity, high surface area, and tunable pores. In addition, they can be multifunctionalized. These properties were used to create multifunctional drug delivery systems combining folic acid as a target molecule and methotrexate (MTX) as an anticancer drug. The silica nanoflakes were formed using graphene oxide and double-layered hydroxide as templates, respectively. After the removal of matrices, the silica flakes were functionalized by folic acid and loaded with methotrexate. The differences in drug release performance and structural stability were analyzed with respect to the detailed physicochemical characterization of the produced silica nanoflakes.

Adres strony internetowej (link) do pełnego tekstu publikacji: https://www.mdpi.com/2076-3417/10/18/6465

Tytuł: Multi-criterial analysis of oversize cargo transport through the city, using the AHP method

Autor/Autorzy: Anna Wolnowska, Wojciech Konicki

Miejsce publikacji: Transportation Research Procedia

Rok: 2019

Słowa kluczowe: Analytic Hierarchy Process AHP, cities, oversize cargo

Abstrakt: The aim of the underlying paper is to evaluate the transport route variants to be used for the transport of oversize cargo through the city of Szczecin using the AHP method together with the selection of the best one. Three route variants have been compared using the Analytic Hierarchy Process method, for the case of simulated steel structure transport. The work presents rational premises for the planning of urban transport of oversize cargoes in accordance with the Green City concept.

Adres strony internetowej (link) do pełnego tekstu publikacji: http://authors.elsevier.com/sd/article/S2352146519301516

Tytuł: Removing Cationic Dye from Aqueous Solutions Using as-grown and Modified Multi-Walled Carbon Nanotubes

Autor/Autorzy: Wojciech Konicki, Iwona Pełech

Miejsce publikacji: POLISH JOURNAL OF ENVIRONMENTAL STUDIES

Rok: 2019

Słowa kluczowe: adsorption, carbon nanotubes, cationic dye, Kinetics, Thermodynamics

Abstrakt: In this research we studied the adsorption process of Basic Red 46 (BR46) cationic dye onto as-grown (MWCNTs) and modified multi-walled carbon nanotubes (MWCNTs-MOD). MWCNTs were synthesized by the chemical vapor deposition method using ethylene as a carbon source and nanocrystalline iron as catalyst, and oxidized by concentrated nitric acid to give MWCNTs-MOD. The adsorbents were characterized by XRD, TGA, HRTEM, FTIR, BET, and zeta potential measurements. The effects of initial dye concentration (5 to 40 mg L-1), pH (4.0 to 11.5), and temperature (20, 40, and 60°C) on BR46 adsorption onto MWCNTs and MWCNTs-MOD were studied. The isotherm data were analyzed using Langmuir and Freundlich equations. The equilibrium data fit well the Langmuir isotherm for both MWCNTs and MWCNTs-MOD. The maximum adsorption capacities of BR46 onto MWCNTs and MWCNTs-MOD were 19.5 and 51.8 mg g-1, respectively. The pseudo first-order and pseudo second-order kinetic models and the intraparticle diffusion model were used to describe the kinetic data. Kinetic studies showed that the kinetic data were well described by the pseudo second-order kinetic model. The experimental results indicated that the maximum BR46 removal could be attained at a solution pH of 11.5 and the adsorption capacity obtained was 23.5 and 57.2 mg g-1 for MWCNTs and MWCNTs-MOD, respectively. Thermodynamic parameters (ΔGO, ΔHO, ΔSO) were obtained and it was found that the adsorption of BR46 onto MWCNTs and MWCNTs-MOD was an endothermic and spontaneous process

Adres strony internetowej (link) do pełnego tekstu publikacji: http://www.pjoes.com/Removing-Cationic-Dye-from-Aqueous-Solutions-nUsing-as-grown-and-Modified-Multi-Walled,85069,0,2.html

Tytuł: Adsorptive removal of cationic dye from aqueous solutions by ZnO/ZnMn2O4 nanocomposite

Autor/Autorzy: Wojciech Konicki, Daniel Sibera, Urszula Narkiewicz

Miejsce publikacji: SEPARATION SCIENCE AND TECHNOLOGY

Rok: 2018

Słowa kluczowe: adsorption, cationic dye, Kinetics, Thermodynamics, ZnMn2O4

Abstrakt: The ZnO/ZnMn2O4 nanocomposite (ZnMn) was used as adsorbent for the removal of cationic dye Basic Yellow 28 (BY28) from aqueous solutions. The adsorbent was characterized by X-ray diffraction, scanning electron microscope, TEM, Fourier transform infrared ray, BET, particle size distribution and zeta potential measurements. The adsorption parameters, such as temperature, pH and initial dye concentration, were studied. Kinetic adsorption data were analyzed using the pseudo-first-order, pseudo-second-order and intraparticle diffusion kinetic models. The Langmuir and Freundlich isotherm models were applied to fit the equilibrium data. The maximum adsorption capacity of BY28 was 48.8 mg g−1. Various thermodynamic parameters, such as ΔG°, ΔH° and ΔS°, were calculated.

Adres strony internetowej (link) do pełnego tekstu publikacji: https://www.tandfonline.com/doi/full/10.1080/01496395.2018.1444054

Tytuł: Analysis of the environmental impacts of unloading bays based on cellular automata simulation

Autor/Autorzy: Stanisław Iwan, Kinga Kijewska, B.G Johansen O. Eidhammer, Krzysztof Małecki,WojciechKonicki,

R. G.Thompsond

Miejsce publikacji: TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT

Rok: 2018

Słowa kluczowe: Urban freight transport, Environmentally friendly transport, Unloading bays, Bicycle freight, Cellular automata, Pollution models

Abstrakt: Urban freight transport contributes to a number of environmental problems, such as poor air quality, noise and greenhouse gas emissions. Analysing the impact of UFT measures is particularly important, since improving the situation for freight deliveries more often than not will be at the expense of the citizens. Unloading bays are one of the most popular and simple solutions to implement to support the development of a sustainable urban freight transport system. This measure is aimed at reducing the congestion in busy city streets, which is often caused by delivery vehicles parking directly on traffic lanes to perform their (un)loading operations. The analysis, presented in this paper, is aimed at emphasising the advantages of unloading bays for the public, and thus enhancing the arguments in favour of popularisation of unloading bays. We simulate the traffic in areas of Szczecin and Oslo, and compare the situation without unloading bays to the situation with unloading bays. This is used to predict the benefits of unloading bays in terms of traffic flow and emissions. The basis of the analysis is utilization of a scenario-based approach and cellular automata simulation.

Adres strony internetowej (link) do pełnego tekstu publikacji: https://www.sciencedirect.com/science/article/pii/S1361920916303881

Tytuł: Adsorption of cationic dyes onto Fe@graphite core-shell magnetic nanocomposite: Equilibrium, kinetics and thermodynamics

Autor/Autorzy: Wojciech Konicki, Agnieszka Hełminiak, Walerian Arabczyk, Ewa Mijowska

Miejsce publikacji: CHEMICAL ENGINEERING RESEARCH & DESIGN

Rok: 2018

Słowa kluczowe: adsorption, Cationic dyes, Kinetics, Nanocomposite, Thermodynamics

Abstrakt: Magnetically separable Fe@graphite core-shell nanocomposite particles (Fe@G) were synthesized by chemical vapor deposition CVD process and characterized by XRD, HRTEM, HAADF-STEM, FTIR, Raman spectroscopy, BET and zeta potential measurements. Nanocomposite was used to adsorb two cationic dyes, Basic Yellow 28 (BY28) and Basic Red 46 (BR46), from aqueous solutions. Adsorption process was investigated under different experimental conditions of pH (3-11), initial dye concentration (10–50 mg L−1) and temperature (20–60 °C). The adsorption kinetics were examined using pseudo-first-order, pseudo-second-order and intraparticle diffusion model. The equilibrium adsorption data were analyzed by Langmuir, Freundlich and Temkin isotherm models. The results revealed that the pseudo-second-order model and Langmuir isotherm fit the kinetics and equilibrium data, respectively. In addition, various thermodynamic parameters, such as change in free energy (ΔGoo), enthalpy (ΔHoo) and entropy (ΔSoo), were also calculated. The thermodynamic analysis showed that the adsorption of BY28 and BR46 was spontaneous and endothermic.

Adres strony internetowej (link) do pełnego tekstu publikacji: http://www.sciencedirect.com/science/article/pii/S026387621730607X

Tytuł: Removal of Rhodamine B from aqueous solution by ZnFe2O4 nanocomposite with magnetic separation performance

Autor/Autorzy: Wojciech Konicki, Daniel Siber, Urszula Narkiewicz

Miejsce publikacji: Polish Journal of Chemical Technology

Rok: 2017

Słowa kluczowe: adsorption, Kinetics, Rhodamine B, Thermodynamics, ZnFe2O4

Abstrakt: Magnetic ZnFe2O4 nanocomposite (ZnFe-NC) was used as an adsorbent for the removal of Rhodamine B (RB) from aqueous solution. The synthesized nanocomposite was characterized by XRD, SEM, HRTEM, BET and FTIR. The effects of various parameters such as initial RB concentration (5–25 mg L–1), pH (3.4–11.1) and temperature (20–60oC) were investigated. The adsorption capacity at equilibrium increased from 5.02 to 9.83 mg g–1, with the increase in the initial concentration of RB from 5 to 25 mg L–1 at pH 7.0 and at 20oC. The experimental results indicated that the maximum RB removal could be attained at a solution pH of 4.4 and the adsorption capacity obtained was 6.02 mg g–1. Kinetic adsorption data were analyzed using the pseudo-first-order kinetic model, the pseudo-second-order model and the intraparticle diffusion model. The adsorption kinetics well fitted using a pseudo-second-order kinetic model. The experimental isotherm data were analyzed using two isotherm models, namely, Langmuir and Freundlich. The results revealed that the adsorption behavior of the RB onto ZnFe-NC fitted well with the Langmuir isotherm model. In addition, various thermodynamic parameters, such as standard Gibbs free energy (ΔGo), enthalpy (ΔHo) and entropy (ΔSo) have been calculated.

Adres strony internetowej (link) do pełnego tekstu publikacji: https://sciendo.com/article/10.1515/pjct-2017-0069

Tytuł: Adsorption of Acid Red 88 Anionic Dye from Aqueous Solution onto ZnO/ZnMn2O4 Nanocomposite: Equilibrium, Kinetics, and Thermodynamics

Autor/Autorzy: Wojciech Konicki, Daniel Sibera, Urszula Narkiewicz

Miejsce publikacji: POLISH JOURNAL OF ENVIRONMENTAL STUDIES

Rok: 2017

Słowa kluczowe: adsorption, anionic dye, Kinetics, Thermodynamics, ZnMn2O4

Abstrakt: The adsorption of acid red 88 (AR88) anionic dye onto ZnO/ZnMn2O4 nanocomposite (ZnMn-NC) prepared by the hydrothermal method was carried out. The adsorbent was characterized by means of XRD, SEM, HRTEM, Raman spectroscopy, FTIR, BET, and zeta potential measurements. We investigated the influence of dye initial concentration, temperature, and pH on AR88 adsorption onto ZnMn-NC. Equilibrium data were analyzed by model equations such as Langmuir and Freundlich isotherms and were best represented by the Freundlich isotherm model. The experimental kinetic data were analyzed using pseudo first-order, pseudo second-order, and intraparticle diffusion kinetic models. The adsorption kinetics was best fitted to the pseudo second-order kinetic model. Thermodynamic parameters, change in free energy ΔGº, enthalpy ΔHº, and entropy ΔSº were also evaluated, indicating the spontaneous and exothermic character of the adsorption of AR88 onto ZnMn-NC.

Adres strony internetowej (link) do pełnego tekstu publikacji: http://www.pjoes.com/Adsorption-of-Acid-Red-88-Anionic-Dye-from-Aqueous-Solution-onto-ZnO-ZnMn2O4-Nanocomposite,70003,0,2.html

Tytuł monografii: Grafen 2D

Tytuł rozdziału monografii:Badanie adsorpcji barwników przemysłowych na nanomateriałach węglowych

Autor/Autorzy: Wojciech Konicki

Rok: 2017

Słowa kluczowe: absorpcja, barwniki przemysłowe, nanomateriały węglowe

Abstrakt: Jednym z głównych problemów związanych z ochroną środowiska jest usuwanie toksycznych zanieczyszczeń pochodzących ze ścieków przemysłowych w postaci barwników. Potencjalnym źródłem tych zanieczyszczeń jest głównie przemysł tekstylny, farbiarski, papierniczy, skórzany, tworzyw sztucznych oraz spożywczy. Obecność nawet bardzo niskich stężeń barwników w wodzie prowadzi do redukcji przenikania światła, hamując tym samym proces fotosyntezy flory wodnej.Jednocześnie, część barwników przemysłowych charakteryzuje się działaniem rakotwórczym, mutagennym i teratogennym, a także toksycznością w stosunku do ludzi, mikroorganizmów i ryb. Mając na uwadze powyższe fakty przeprowadzono badania związane z usuwaniem przemysłowych barwników anionowych i kationowych za pomocą nanomateriałów węglowych w formie nanosfer, wielościennych nanorurek oraz tlenku grafenu. Materiały zostały scharakteryzowane za pomocą analizy FTIR, TGA, AFM, SEM, HRTEM, BET, Ramana oraz zeta potencjału. Badania prowadzono z uwzględnieniem początkowego stężenia barwnika w roztworze (5-58mg L-1), początkowego pH roztworu (3-11.7) oraz wpływu temperatury (20-60OC) na proces adsorpcji. W celu zbadania mechanizmu oraz określenia szybkości procesu kontrolującego etap adsorpcji zastosowano model kinetyczny pseudo-pierwszego rzędu, pseudo-drugiego rzędu oraz model dyfuzji wewnątrz cząstkowej Webera-Morrisa. Badania równowagi adsorpcyjnej dla układu ciecz-ciało stałe z jednoczesnym wyznaczeniem parametrów charakteryzujących zdolność adsorpcyjną nanomateriału zostały przeprowadzone z wykorzystaniem modelu adsorpcji Langmuira oraz Freundlicha. Wyznaczone zostały także parametry termodynamiczne procesu jak entalpia (HO), entropia (SO) oraz energia swobodna Gibbsa (GO). Otrzymane wyniki badań wskazują na wysoki potencjał aplikacyjny nanomateriałów węglowych, jako adsorbentów zanieczyszczeń w postaci barwników przemysłowych z fazy ciekłej.

ISBN: 978-83-7663-240-7

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Tytuł: Assessment of freight transport flows in the city centre based on the Szczecin example – methodological approach and results

Autor/Autorzy: Stanisław Iwan, Kinga Kijewska, Wojciech Konicki, Dawid Kijewski

Miejsce publikacji: Research in Transportation Business & Management

Rok: 2017

Słowa kluczowe: City logistics, Transport pollution, Transport environmental impact, Data collection Methodology, Urban freight transport

Abstrakt: The dynamic development of transport in recent years constitutes an important factor in the economic development of the world, but it is also a source of problems, which can be observed especially in urban areas. A growing number of city users results in increased demand for freight distribution, the large part of which is generated by industrial, retail and service entities. The distribution function initiated by these entities causes an increase in the logistics flows within a limited area. The main problem arising in the process of analysing the functioning of transport and distribution of goods in cities is lack of data regarding classification of vehicles, their routes, demand for transport, etc. The objective of the paper is to present the methodology and results of research done in Szczecin (Poland). It fills the information gap in the functioning of UFT in the analysed area.

Adres strony internetowej (link) do pełnego tekstu publikacji: http://www.sciencedirect.com/science/article/pii/S2210539516301560

Tytuł: Equilibrium and kinetics studies for the adsorption of Ni2+ and Fe3+ ions from aqueous solution by graphene oxide

Autor/Autorzy: Wojciech Konicki, Małgorzata Aleksandrzak, Ewa Mijowska

Miejsce publikacji: Polish Journal of Chemical Technology

Rok: 2017

Słowa kluczowe: adsorption, Graphene oxide, iron, Kinetics, nickel

Abstrakt: In this study, the adsorption of Ni2+ and Fe3+ metal ions from aqueous solutions onto graphene oxide (GO) have been explored. The effects of various experimental factors such as pH of the solution, initial metal ion concentration and temperature were evaluated. The kinetic, equilibrium and thermodynamic studies were also investigated. The adsorption rate data were analyzed using the pseudo-first-order kinetic model, the pseudo-second-order kinetic model and the intraparticle diffusion model. Kinetic studies indicate that the adsorption of both ions follows the pseudo-second-order kinetics. The isotherms of adsorption data were analyzed by adsorption isotherm models such as Langmuir and Freundlich. Equilibrium data fitted well with the Langmuir model. The maximum adsorption capacities of Ni2+ and Fe3+ onto GO were 35.6 and 27.3 mg g−1, respectively. In addition, various thermodynamic parameters, such as enthalpy (ΔHO), entropy (ΔSO) and Gibbs free energy (ΔGO), were calculated.

Adres strony internetowej (link) do pełnego tekstu publikacji: https://www.readcube.com/articles/10.1515%2Fpjct-2017-0058

Tytuł: Removal of anionic dyes using magnetic Fe@graphite core-shell nanocomposite as an adsorbent from aqueous solutions

Autor/Autorzy: Wojciech Konicki, Agnieszka Hełminiak, Walerian Arabczyk, Ewa Mijowska

Miejsce publikacji: JOURNAL OF COLLOID AND INTERFACE SCIENCE

Rok: 2017

Słowa kluczowe: adsorption, Anionic dyes, Kinetics, magnetic nanocomposite, Thermodynamics

Abstrakt: In this study, magnetic Fe@graphite nanocomposite (Fe@G-N) with a core-shell structure was prepared by chemical vapor deposition CVD process for the adsorptive removal of anionic dyes from aqueous solutions. Fe@G-N was characterized by XRD, HRTEM, HAADF-STEM, FTIR, Raman spectroscopy, BET and zeta potential measurements, and then applied in adsorption of two kinds of anionic dyes, Acid Red 88 (AR88) and Direct Orange 26 (DO26). The effect of parameters like initial dye concentration (5–40 mg L−1), pH solution (4–10) and temperature (20–60 °C) on the adsorption process was studied. The pseudo-first-order, pseudo-second-order kinetic models and the intraparticle diffusion model were used to describe the kinetic data. A kinetic study indicated that a pseudo-second-order model agreed well with the experimental data. The experimental data were analyzed by the Langmuir and Freundlich adsorption models. Adsorption equilibrium studies showed that adsorption of AR88 and DO26 followed the Langmuir model. Thermodynamic parameters such as Gibbs free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) were also obtained and analyzed.

Adres strony internetowej (link) do pełnego tekstu publikacji http://www.sciencedirect.com/science/article/pii/S0021979717302485:

Tytuł: Adsorption of anionic azo-dyes from aqueous solutions onto graphene oxide: Equilibrium, kinetic and thermodynamic studies

Autor/Autorzy: Wojciech Konicki, Małgorzata Aleksandrzak, Dariusz Moszyński, Ewa Mijowska

Miejsce publikacji: JOURNAL OF COLLOID AND INTERFACE SCIENCE

Rok: 2017

Słowa kluczowe: adsorption, Anionic dyes, Graphene oxide, Kinetics, Thermodynamics

Abstrakt: In the present study, graphene oxide (GO) was used for the adsorption of anionic azo-dyes such as Acid Orange 8 (AO8) and Direct Red 23 (DR23) from aqueous solutions. GO was characterized by Fourier Transform-Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), Thermogravimetric Analysis (TGA), Atomic Force Microscopy (AFM), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), High-Resolution Transmission Electron Microscopy (HRTEM) and zeta potential measurements. The influence of dye initial concentration, temperature and pH on AO8 and DR23 adsorption onto GO was investigated. Equilibrium data were analyzed by model equations such as Langmuir Freundlich, Temkin, Dubinin-Radushkevich and Redlich-Peterson isotherms and were best represented by Langmuir and Redlich-Peterson isotherm model. Kinetic adsorption data were analyzed using the pseudo-first-order kinetic model, the pseudo-second-order kinetic model and the intraparticle diffusion model. The adsorption kinetics well fitted using a pseudo-second-order kinetic model. Thermodynamics parameters, ΔG°, ΔH° and ΔS°, were calculated, indicating that the adsorption of AO8 and DR23 onto GO was spontaneous process. The adsorption process of AO8 onto GO was exothermic, while the adsorption of DR23 onto GO was endothermic in nature.

Adres strony internetowej (link) do pełnego tekstu publikacji: http://www.sciencedirect.com/science/article/pii/S0021979717301947

Tytuł: Equilibrium, kinetic and thermodynamic studieson adsorption of cationic dyes from aqueoussolutions using graphene oxide

Autor/Autorzy: Wojciech Konicki, Małgorzata Aleksandrzak, Ewa Mijowska

Miejsce publikacji: CHEMICAL ENGINEERING RESEARCH & DESIGN

Rok: 2017

Słowa kluczowe: adsorption, Cationic dyes, Graphene oxide, Kinetics, Thermodynamics

Abstrakt: The adsorption of cationic dyes Basic Yellow 28 (BY28) and Basic Red 46 (BR46) from an aqueous solution by graphene oxide (GO) as adsorbent is presented. Graphene oxide is prepared using a modified Hummers’ method and characterized by Fourier Transform-Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Atomic Force Microscopy (AFM), Raman spectroscopy, Transmission Electron Microscopy (TEM) and zeta potential measurements. Adsorption properties of cationic dyes using GO were studied in different dye concentrations (10–50 mg L−1), pH of the solutions (3.0–11.0), and temperature range of 20–60 °C. The Langmuir and Freundlich isotherm models were applied to fit the adsorption data. Equilibrium data fitted very well with the Langmuir isotherm model. The maximum monolayer adsorption capacity of BY28 and BR46 onto GO was 68.5 and 76.9 mg g−1, respectively. The experimental kinetics data were analyzed using pseudo-first-order, pseudo-second-order and intraparticle diffusion kinetic models. The kinetic studies showed that the adsorption data followed the pseudo-second-order kinetics model. In addition, various thermodynamic parameters, such as the Gibbs free energy (ΔG°), enthalpy (ΔH°), and entropy (ΔS°) were calculated and it was revealed that the adsorption of BY28 and BR46 was spontaneous and endothermic.

Adres strony internetowej (link) do pełnego tekstu publikacji: http://www.sciencedirect.com/science/article/pii/S026387621730179X