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1

Tests on the Application of Various Types of Biomass for Activated Carbon Production

Skoczko Iwona, Guminski Remigiusz

Journal of Ecological Engineering

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2024

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Vol. 25, nr 1

285--302

EN

Activated carbon (AC) is one of the best adsorbents for removing trace contaminants from air, soil and water due to its adsorption properties. It is produced from carbon-rich materials, mainly fossil raw materials. However, the price of hard coals has increased significantly in recent years due to the COVID-19 pandemic and the war in Ukraine. The existing eastern markets became blocked for carbon-raw-material sourcing. It is therefore important to find alternative materials or plant-based products. This study investigated the possibility of manufacturing activated carbon from waste biomass such as sugar beet fibers (SBSF), mixed vegetable processing waste (mainly corn) (MVW) and cherry stones (ChS). The raw material was subjected to pyrolysis, milling, granulation, carbonisation and activation at different times and temperatures. However, of the biomass materials tested, only SBSF in the form of marc can be processed into valuable activated carbon in further production steps. MVW and ChS as carbon substrates showed, in addition to high moisture and ash, low efficiency in decolourising molasses and methylene blue MB and also had a lower specific surface area.

2

Rola rzeki w ożywianiu miasta. Przykład Poznania na tle europejskich osiągnięć w kształtowaniu waterfrontów

Kędzierska Kalina, Kaźmierczak Bartosz

Zeszyty Naukowe Politechniki Poznańskiej. Architektura, Urbanistyka, Architektura Wnętrz

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2023

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Z. 15

295--310

PL

Przekształcanie miast i rewitalizacja utraconej przestrzeni wpisują się w główne cele zrównoważonego rozwoju miast polskich oraz zagranicznych. Poznań, jako miasto historyczne podzielone rzeką Wartą w samym swym centrum, od lat boryka się z problemem niezagospodarowanych terenów nadrzecznych. Celem artykułu jest przedstawienie wybranych procesów rewitalizacji terenów nadwodnych oraz wskazanie, czym powinna charakteryzować się udana rewitalizacja na przykładzie rzeki Mark w Bredzie oraz starego koryta rzeki Turia w Walencji w porównaniu z terenem rzeki Warty w Poznaniu.

EN

Transformation of cities and revitalization of lost space is in line with main goals of sustainable development of cities in Poland and abroad. Poznan, as a historic city divided by river Warta in its very center, has been struggling with the problem of undeveloped water-front areas for many years. The aim of this article is to show selected waterfront revitalization processes and what should characterize successful revitalization based on examples of rivers Mark in Breda and Turia in Valencia in comparison to river Warta in Poznan.

3

Efficient solidification of Pb2+ by activated tungsten tailings and cement

Cheng Hao, Kuang Jingzhong, Zhu Luping, Yuan Weiquan, Huang Zheyu, Yang Yiqiang

Physicochemical Problems of Mineral Processing

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2023

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Vol. 59, iss. 2

art. no. 162618

EN

The preparation of cementing admixture from tailings and co-solidification of Pb2+ with cement is a green way to realize the resource utilization of tailings and treatment of the lead-containing wastewater. In this paper, the tungsten tailings were activated in different ways, and the mechanical properties of the tungsten tailings-cement solidified body with different activation systems and the solidification behavior of Pb2+ were studied. The phase and microstructure of the hydrated product were characterized by XRD, FT-IR, SEM and EDS. The results showed that the curing effect of Pb2+ was obviously different of different activation systems, and the curing effect of the solidified body of the ternary composite activation system (TCAS) was the best, second only to the pure cement system (PCS). Different activation methods have a significant impact on the mechanical properties of the solidified body. With the increase of the Pb2+ content, the compressive strength of the solidified body gradually decreased, the Pb2+ leaching concentration gradually increased; with the extension of the curing age, the compressive strength gradually increased, and the Pb2+ leaching concentration gradually decreased. In particular, the compressive strength of the 28d solidified body was 31.43 MPa and the leaching concentration of Pb2+ was only 0.38 mg/L when the Pb2+ content was 5%. The phase, microstructure and EDS results of the hydration products showed that Pb2+ was mainly solidified in the C-S-H gel.

4

Removal of Amoxicillin from an Aqueous Solution by Activated Carbon Prepared from Biomass

Touijer Abdellah, Yahia El Habib, Saidi Mohamed, Taouil Hamid, Allaoui Mohamed, Ahmed Saïd Ibn

Journal of Ecological Engineering

|

2023

|

Vol. 24, nr 9

63--79

EN

Amoxicillin type Amox-500 is a β-lactam antibiotic belonging to the penicillin family, used to treat infections caused by bacteria. This drug has been, purified by the slow recrystallization method and characterized by RAMAN. The treatment of antibiotic-laden effluent is of interest for environmental protection, which is why the field of wastewater treatment is essential for the protection of our environment. In our research, we studied the elimination of amoxicillin as a trace pollutant in untreated wastewater discharges in an aqueous solution prepared in the laboratory, using activated carbon made from banana peel. We also showed the presence of these pharmaceutical pollutants (amoxicillin and paracetamol) in wastewater from the Dradeb area of the city of Tangier in Morocco. In this research, we took advantage of the use of activated carbon, which has been, previously treated in our laboratory for a study, which is, published [Abdellah Touijer et al, 2023]. The amount of amoxicillin adsorption is influenced by various operating parameters, and with the help of a parametric study, we have deduced the best conditions from these parameters to promote good amoxicillin adsorption yield. The amount adsorbed at equilibrium increases proportionally with amoxicillin concentration, and equilibrium is reached after the first 20 min. The maximum equilibrium amoxicillin adsorption capacity (qe) is 35 mg/g for PBC600 (banana peel carbonized at 600°C for 60 min) and PBC700 (banana peel carbonized at 700 °C for 60 min), and 25 mg/g for PBC500 (banana peel carbonized at 500 °C for 60 min). Under the following operating conditions: C0 = 20 mg/l, temperature 20±5 °C, pH=6 lower than pHpzc, adsorbent/adsorbat ratio 0.5 mg/ml, stirring time 45 min. The best adsorption efficiency was 85.2% for PBC700, 79.31% for PBC600 and 12.47% for PBC500, indicating that the amount of amoxicillin adsorbed at equilibrium is proportional to the carbonization temperature. The theoretical study of the adsorption isotherm of amoxicillin on activated carbon prepared from banana peel shows that the Langmuir, Freundlich and Temkin models describe this adsorption phenomenon well, similar to the experimental results. Adsorption of amoxicillin follows a pseudo-second-order kinetic model. Thermodynamic analysis has shown that standard enthalpy (ΔH°), standard free enthalpy (ΔG°), and free entropy (ΔS°) are negative values, allowing us to say that this adsorption process is spontaneous and favorable, meaning the decrease in disorder.

5

Influence of polymers on the grinding and rheology of ultrafine Egyptian calcium carbonate suspension

Mourad Sabreen H, Khalil Mostafa M. H., Abdel-Khalek N. A., Abdel-Khalek M. A., Selim K. A., Hassan El-Sayed R. E.

Physicochemical Problems of Mineral Processing

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2022

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Vol. 58, iss. 6

art. no. 152163

EN

The investigation of surface modification of Egyptian calcium carbonate via polymers was achieved with simultaneous ultra-fine grinding. Attrition mill and planetary mill were used for wet and dry grinding, respectively. The parameters affecting the grinding were studied such as ball number, speed and grinding time. The rheological characteristics of the aqueous calcium carbonate suspensions were studied in the presence of different types of polymers. The results indicated that the mechanical force could clearly affect the modification characteristics of calcium carbonate due to its mechanochemical effects. The viscosity of calcium carbonate suspension depends on the volume percentage or weight percentage. The dispersing agent increases the solid concentration for a given particle fineness.

6

Enhancement of xanthate adsorption on chrysocolla surface via sodium diethyldithiocarbamate (DDTC) modification

Liu Dan, Wang Daqian, Xian Yongjun, Tian Xiaosong, Wen Shuming

Physicochemical Problems of Mineral Processing

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2022

|

Vol. 58, iss. 6

art. no. 152599

EN

Chrysocolla is a kind of copper oxide mineral which was difficult to float. In this study, Diethyldithiocarbamate (DDTC) was employed to modify the surface of chrysocolla to improve its xanthate adsorption and floatability. Flotation experiments showed that the DDTC exhibited ability to activate rather than acting as a collector for chrysocolla flotation. After DDTC activation, chrysocolla can be effectively recovered by xanthate. The activation mechanism of DDTC was investigated via Fourier transform infrared (FT-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS). During the activation, DDTC bonded to the surface copper atoms of chrysocolla, and more Cu(II) species on the mineral surface were reduced to Cu(I) species, which caused the formation of larger amounts of Cu active sites as –N–C(=S)S–Cu(II)– and Cu(I) species. The results of the adsorption tests and zeta potential measurements revealed that the DDTC-modified mineral surface reinforced adsorption of xanthate ions, thereby improving the chrysocolla floatability. Therefore, the Cu ions double interaction of DDTC and xanthate on the chrysocolla surfaces enhanced the strength and stability of the hydrophobic layer, resulting in an enhanced hydrophobization of the chrysocolla for its flotation.

7

Wpływ procesu aktywacji na właściwości bentonitów

Ryłko Kinga, Skorupa Natalia, Sobczyk Natalia, Lenar Nikola

Analit

|

2022

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Nr 12

36--48

PL

Bentonit, pod względem geologicznym, zaliczany od jest do skał pochodzenia wulkanicznego. Jest to ił wykazujący silne pęcznienie oraz cechujący się unikalnymi właściwościami fizycznymi. Parametry te wynikają z wysokiej zawartości montmorylonitu (minerał ilasty należący do grupy smektytu). Podczas aktywacji zachodzi proces kontrolowanej wymiany jonów. Wspomniane jony wapnia, znajdujące się początkowo w międzypakietowej przestrzeni montmorylonitu, zastępowane są jonami sodu, które wprowadza się z aktywatorem. Proces aktywacji bentonitu powoduje polepszenie jego właściwości - zwiększoną zdolność pęcznienia czy też podwyższoną zdolność wiązania. W niniejszym artykule skupiono się na zbadaniu podstawowych właściwości bentonitów oraz ich zmiany pod wpływem procesu aktywacji. Badania pH, przeprowadzone przy użyciu elektrody szklanej, wykazały, że stężenia jonów wodorowych były znacznie wyższe i stabilniejsze w czasie w przypadku bentonitu aktywowanego. Na podstawie otrzymanych wyników przewodnictwa mierzonego metodą konduktometrii można zaobserwować wzrost jego wartości wraz z upływem czasu. Tendencja ta była obserwowalna w przypadkach obu bentonitów, z tą różnicą, że wartości przewodnictwa bentonitu aktywowanego przyjmowały kilkukrotnie wyższe wartości w porównaniu z tym niepoddanym aktywacji. Analiza otrzymanych wartości wykazała, że bentonit aktywowany pęczniał 4-krotnie bardziej niż ten nieaktywowany. Zarówno współczynnik pęcznienia, jak i zawartość wody wyznaczone zostały eksperymentalnie. Po usunięciu, w procesie suszenia, wody adsorpcyjnej oraz międzypakietowej, bentonit aktywowany zawierał dwa razy mniej wody niż ten niepoddany aktywacji węglanem sodu.

EN

Bentonite is classified as a rock of volcanic origin. It is a clay that shows strong swelling and has unique physical properties. These parameters are caused by the high content of montmorillonite (a clay mineral belonging to the smectite group). During activation, a process of controlled ion exchange takes place. The calcium ions, initially located in the inter-pack space of montmorillonite, are replaced by sodium ions with activator. The activation process of bentonite results in an improvement of its properties - increased swelling capacity or binding capacity. This article focuses on the examination of the basic properties of bentonites and their changes under the effect of the activation process. Studies of pH, conducted using a glass electrode, showed that the concentration of hydrogen ions was much higher and more stable over time for the activated bentonite. The results obtained after conductometric measurements show the incensement of conductivity with time. This trend was visible in the cases of both bentonites, with the difference that the conductivity values of the activated bentonite assumed significantly higher compared to values obtained to inactivated one. Analysis of the obtained values showed that the activated bentonite swelled 4 times more the inactivated one. Values of swelling coefficient and water content were determined experimentally. After removal of adsorption and inter-pack water (during the drying process), the activated bentonite contained twice less water than the one not activated by adding sodium carbonate.

8

The issue of activation of cognitive activity of undergraduates

Starokon Yevhen, Dziubchuk Roman, Korniichuk Yurii

Nowoczesne Systemy Zarządzania

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2021

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T. 16, nr 2

13--22

EN

The article analyzes the place and role of the teacher in activating the cognitive activity of higher education students. It is stated that the teacher is a key figure in activating the cognitive activity of higher education students. The emphasis of his work should shift not to the transfer of accumulated knowledge at the moment, but to the formation of learning motivation. The analysis shows that most researchers in their work focus on cognitive and didactic and methodological areas of activation of cognitive activity. Issues directly related to the transformation of cognitive needs of higher education students through the optimization of pedagogical interaction have been little studied. The authors consider the task of intensifying educational activities through the use in pedagogical communication of didactic and psychological patterns and principles of educational interaction. The emphasis in such subject-subject interaction should be on, in particular, the formation of a hierarchy of personal needs necessary for higher education students. The article presents in graphical form the structure of the need-motivational sphere of higher education seekers with different strengths of learning motivation. Only positive emotion can restructure the hierarchy of needs of a person with low learning motivation. This thesis is confirmed by the result of the study of the correlation between the average score of higher education students for 5 years and the level of satisfaction of their basic needs (according to A. Maslow). It is proposed to use, first of all, the technology of creating a situation of success in learning, active teaching methods, in particular, the method of projects, for the formation of internal motives for learning. The basis of the process of activating the cognitive activity of higher education teachers is his communicative repertoire: a set of communicative techniques, methods and technologies that provide him with the opportunity to form cognitive needs. The article presents such communicative skills that provide an opportunity to intensify the educational activities of higher education students during classes. In general, the article reveals the technological and motivational levels of the teacher’s teaching activity, taking into account which he can more effectively manage the cognitive activity of higher education students.

PL

W artykule przeanalizowano miejsce i rolę nauczyciela w aktywizacji aktywności poznawczej studentów. Stwierdzono, że nauczyciel jest kluczową postacią w aktywizacji aktywności poznawczej studentów szkół wyższych. Akcent w jego pracy powinien zostać przesunięty nie na transfer wiedzy zgromadzonej w danym momencie, lecz na kształtowanie motywacji do nauki. Z analizy wynika, że większość badaczy w swojej pracy koncentruje się na poznawczych i dydaktyczno-metodologicznych obszarach aktywacji aktywności poznawczej. Zagadnienia bezpośrednio związane z przekształcaniem potrzeb poznawczych studentów poprzez optymalizację interakcji pedagogicznej zostały zbadane w niewielkim stopniu. Autorzy rozważają zadanie intensyfikacji działań edukacyjnych z wykorzystaniem w komunikacji pedagogicznej wzorców dydaktycznych i psychologicznych oraz zasad interakcji wychowawczej. W takiej interakcji przedmiot‒przedmiot należy w szczególności położyć nacisk na ukształtowanie hierarchii potrzeb osobistych, niezbędnych dla studentów szkół wyższych. Publikacja przedstawia w formie graficznej strukturę sfery potrzebowo-motywacyjnej osób ubiegających się o wykształcenie wyższe o różnej sile motywacji do nauki. Tylko pozytywne emocje mogą zmienić hierarchię potrzeb osoby o niskiej motywacji do nauki. Tezę tę potwierdza wynik badania korelacji między średnim wynikiem studentów szkół wyższych za 5 lat a poziomem zaspokojenia ich podstawowych potrzeb (według A. Maslowa). Sugeruje się przede wszystkim wykorzystanie technologii tworzenia sytuacji sukcesu w nauce, aktywnych metod nauczania, w szczególności metody projektów, do kształtowania wewnętrznych motywów uczenia się. Podstawą procesu aktywizacji aktywności poznawczej nauczycieli szkół wyższych jest ich repertuar komunikacyjny: zbiór technik, metod i technologii komunikacyjnych, które dają możliwość kształtowania potrzeb poznawczych. W artykule przedstawiono takie umiejętności komunikacyjne, które umożliwiają zintensyfikowanie działań edukacyjnych studentów na zajęciach. Ogólnie artykuł ukazuje poziom technologiczny i motywacyjny działalności dydaktycznej nauczyciela. Bierze się pod uwagę to, że może on skuteczniej zarządzać aktywnością poznawczą studentów.

9

Obliczanie temperatury optymalnej oraz energii aktywacji i dezaktywacji dla reakcji hydrolizy oleju z oliwek przez lipazę z trzustki wieprzowej

Miłek Justyna

Przemysł Chemiczny

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2020

|

T. 99, nr 4

585--587

PL

Wyznaczono termodynamiczne parametry lipazy z trzustki wieprzowej, wykorzystując dane doświadczalne z badania zmiany aktywności lipazy w zależności od temperatury. Model matematyczny opisujący wpływ temperatury na aktywność lipazy z trzustki wieprzowej wyprowadzono przy założeniu, że reakcja hydrolizy oleju z oliwek przez lipazę przebiega zgodnie z kinetyką pierwszego rzędu ze względu na stężenie enzymu. Wyznaczono wartości temperatury optymalnej Tₒₚₜ, energii aktywacji Eₐ i energii dezaktywacji Ed, które wynosiły odpowiednio: 306,78 ± 0,54 K, 86,75 ± 11,47 kJ/mol, 122,12 ± 7,26 kJ/mol.

EN

Exptl. data on the temp. relationship of porcine pancreas lipase activity published by K. Bagi et al., 1997, were used to calc. the optimal temp., activation energy and deactivation energy of the olive oil hydrolysis rate according a resp. math. model of the reaction. The calc. values were 306.78 ± 0.54 K, 86.75 ± 11.47 kJ/mol, 122.12 ± 7.26 kJ/mol, resp.

10

Raman spectroscopy characterization of some Cu, Fe and Zn sulfides and their relevant surface chemical species for flotation

Vázquez-Sánchez Emmanuel E., Robledo-Cabrera Aurora, Tong Xiong, López-Valdivieso Alejandro

Physicochemical Problems of Mineral Processing

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2020

|

Vol. 56, iss. 3

483--492

EN

Raman spectroscopy as a high-resolution characterization technique was used to analyze various pure metal sulfides immersed in water, namely pyrite (FeS2), chalcopyrite (CuFeS2), sphalerite (ZnS), marmatite (Zn1-XFeXS) and galena (PbS). The Raman characterization was undertaken in situ with the minerals immersed in water. Characteristic Raman spectrum that shows the vibrational modes of the atomic bonds in the mineral crystal structure is reported. This spectroscopic technique revealed that marmatite particles are composed of micro-size, perhaps nano-size, zones with different Fe and Zn content. With the intensity of the Fe-S and Zn-S Raman signals, the iron content of the zones was quantified. The copper ion up-take by marmatite particles was studied through this technique. It was found that the up-take of copper ions on the marmatite zones depended on their Fe content. Copper ion up-take occurred more preferentially on the zones of low Fe content than on those of high Fe content. The adsorption of the collector propyl xanthate on pyrite and chalcopyrite was also assessed by Raman spectroscopy. The Raman spectrum revealed that dixanthogen formed on the surface of these sulfides.

11

Insights into the interaction between octyl hydroxamic acid and the rutile surface activated by lead ion

Cao Qinbo, Chen Xiumin, Zou Heng, Yu Xingcai

Physicochemical Problems of Mineral Processing

|

2020

|

Vol. 56, iss. 5

928--938

EN

The flotation of rutile can be enhanced using lead ion as an activator. However, the binding behavior of collector on the activated rutile surface is still not fully understood. In this work, flotation and theoretical calculation approaches were employed to evaluate the activation behavior of lead ion in the flotation of rutile with octyl hydroxamic acid (OHA). Flotation results indicated that the activation flotation with lead ion should be conducted at pH 6.5. The binding features of OHA molecule on the inactivated and Pb-activated rutile surfaces were both investigated by density functional theory (DFT) studies. The OHA molecule may dissociate into OHA− anion on the inactivated rutile surface, generating a new Ti–O bond. Differently, the chelate complex of Pb-OHA anion was generated on the activated rutile surface, producing two Pb–O bonds. The adsorption of OHA onto the activated rutile surface was more stable than that on the inactivated rutile surface, due to the formation of more chemical bonds on the activated rutile surface. The DFT calculation results delineated the role of Pb2+ in the rutile flotation with OHA.

12

Brain stem - from general view to computational model based on switchboard rules of operation

Duch Włodzisław, Mikołajewski Dariusz

Bio-Algorithms and Med-Systems

|

2020

|

Vol. 16, no. 1

art. no. 20190059

EN

Despite great progress in understanding the functions and structures of the central nervous system (CNS) the brain stem remains one of the least understood systems. We know that the brain stem acts as a decision station preparing the organism to act in a specific way, but such functions are rather difficult to model with sufficient precision to replicate experimental data due to the scarcity of data and complexity of large-scale simulations of brain stem structures. The approach proposed in this article retains some ideas of previous models, and provides more precise computational realization that enables qualitative interpretation of the functions played by different network states. Simulations are aimed primarily at the investigation of general switching mechanisms which may be executed in brain stem neural networks, as far as studying how the aforementioned mechanisms depend on basic neural network features: basic ionic channels, accommodation, and the influence of noise.

13

Revalorization of mineral coal, to obtain carbonaceous materials with high added value

Vidal-Lombas Juan-José, Álvarez-Fernández Martina-Inmaculada, Casado-Sulé María-Concepción, Prendes-Gero Maria-Belen, Suárez-Domínguez Francisco-José

Archives of Mining Sciences

|

2020

|

Vol. 65, no. 2

225--239

EN

This paper shows the possibility that the mineral coal existing in the mining basins of northern Spain have a high added value. This would facilitate its future use in different fields such as new materials, nanotechnology, energy use in situ, coal bed methane, enhanced coal bed methane and coalmine methane.An analytical study of mineral coal samples is carried out. The samples come from two deposits loca-ted in coal basins of the Cantabrian Mountains. The duly prepared samples are subjected to an activation process. Within this transformation, different treatments are applied to different sub-samples. Some of the sub-samples suffer a previous demineralization by successive attacks with acids, followed by oxidation and pyrolysis. Finally, all of them are activated with CO2 and H2O(steam).The carbonaceous products resulting from each treatment are characterised. The results show that all the pre-treatments used were positive for the textural development of the materials. Likewise, proper management of the processes and of the different operating variables allows the procurement of carbo-naceous materials with a “tailor-made” structural development of the coal type. This material receives the name “activated” and can be employed in specific processes.

14

Inhibiting effect of citric acid on the floatability of serpentine activated by Cu(II) and Ni(II) ions

Huang Jun-wei, Zhang Cheng-qiang

Physicochemical Problems of Mineral Processing

|

2019

|

Vol. 55, iss. 4

960--968

EN

The laboratory researches about the inhibiting effect of citric acid on the flotation performance of serpentine activated by Cu2+ and Ni2+ were carried out through micro flotation tests, zeta potential measurements, collector adsorption capacity measurements and solution chemistry analysis. The flotation results showed that Cu2+ and Ni2+ could remarkably activate the flotation of serpentine when the pH value was more than 6, however, this activation could be effectively weakened by adding citric acid. Zeta potential measurement and adsorption capacity measurement indicated that the presence of citric acid could prevent the adsorption of Cu2+ and Ni2+, and therefore reduce the adsorption amount of potassium butyl xanthate on serpentine surface. Furthermore, solution chemical analysis of the flotation system showed that copper hydroxide Cu(OH)2(s) and the nickel hydroxide Ni(OH)2(s) were the main component in the pH range of 9 to 10, which adsorbed onto serpentine surface and made it activated; while the citric acid could effectively prohibit the formation of these metal hydroxide in slurry so as to inhibit the activation impact.

15

Improving the carbon dioxide uptake efficiency of activated carbons using a secondary activation with potassium hydroxide

Zgrzebnicki M., Michalczyszyn E., Wrobel R. J.

Polish Journal of Chemical Technology

|

2018

|

Vol. 20, nr 3

87--94

EN

Secondary activation of commercial activated carbon (AC) ORGANOSORB 10-CO was carried out at 600, 700 and 800°C with mass ratios of potassium to AC (K/AC) in range 1–3. Crucial samples have shown following CO2 uptakes and SSA – 3.90 mmol/g and 1225 m2/g, 4.54 mmol/g and 1546 m2/g, 4.28 and 1717 m2/g for pristine material and samples obtained at 700°C with K/AC = 2 and at 800°C with K/AC = 3 respectively. Last sample also indicated significant mesopore volume increase in diameter range 2–5 nm, from 0.11 to 0.24 cm3/g. CO2 uptake increase was explained by formation of micropores up to diameter of 0.8 nm, which distribution was established from CO2 sorption using DFT. Surface chemistry of all samples has not changed during modification, what was proven by XPS. Moreover, deeper incorporation of potassium ions into graphite at higher temperatures was observed as confirmed with EDS, XPS and XRD.

16

The surface features of activated stibnite surface with copper or lead ion

Cao Q., Huang Y., Zou H., Wen S.

Physicochemical Problems of Mineral Processing

|

2018

|

Vol. 54, iss. 3

763--770

EN

Cu2+ and Pb2+ are widely used as activators for the flotation of stibnite. In this work, by the treatment of Cu2+ or Pb2+, the activation product and the thickness of activation layer on the stibnite surface were both investigated. Based on the flotation results, zeta potential analysis and X-ray photoelectron spectroscopy (XPS) study, it was found that Cu2+ was reduced to Cu+ at the stibnite surface and a layer of Cu2S was formed at the surface. While, a PbS layer presenting at the stibnite surface is responsible for the activation flotation of stibnite with Pb2+. Time of flight secondary ion mass spectrometry (TOF-SIMS) analysis further implies that, when stibnite was activated with 5×10-5 mol/dm3 of CuSO4 or Pb(NO3)2, the thickness of Cu2S layer on the Cu-activated surface was close to 2.7 nm, while the thickness of PbS layer was about 1.8 nm on the Pb-activated surface.

17

An innovative method of activating lime waste. Waste – sorbent - product

Knaś K.

Acta Innovations

|

2018

|

no. 29

27--35

EN

The paper presents the production technology of sorbents for flue gas desulphurization with the wet limestone method, produced on the basis of limestone waste. The waste was subjected to comprehensive physicochemical tests and the following were studied: size distribution, chemical composition, morphology and reactivity. The analysed waste was subjected to electromagnetic activation to improve the sorption properties lost in the original process. The effect of the activation process was determined by comparing physicochemical properties of the waste before and after its activation. Based on the experience gained, an industrial installation was designed and manufactured industrial.

18

Social, Economic, Spatial and Construction-related Problems of Zwierzyniec. The Four Seasons

Jagiełło-Kowalczyk M.

Technical Transactions

|

2017

|

Vol. 12(114)

15--23

EN

The publication presents the social, economic, spatial and construction-related problems that are being faced by the commune of Zwierzyniec. It discusses the effects of the cooperation of the commune with the Faculty of Architecture of the Cracow University of Technology. These effects, expressed in the form of diploma engineer's design theses of the students of the Faculty of Architecture, are to promote Zwierzyniec and its activation during all of the seasons of the year. One of the important, identified problems of the area of Roztocze in question is that all activity “freezes” there during the autumn and winter seasons.

PL

Publikacja przedstawia problemy społeczne, gospodarcze i przestrzenno-inwestycyjne, z jakimi boryka się gmina Zwierzyniec. Omawia efekty współpracy gminy z Wydziałem Architektury Politechniki Krakowskiej. Efekty te, wyrażone w postaci projektów dyplomowych inżynierskich studentów Wydziału Architektury, mają służyć promocji Zwierzyńca i jego aktywizacji we wszystkich porach roku. Jednym bowiem z istotnych, zidentyfikowanych problemów omawianego terenu Roztocza jest jego „zamieranie” w sezonie jesienno-zimowym.

19

Rola współpracy uczelnia–samorząd w aktywizacji przestrzeni miejskich

Jagiełło-Kowalczyk M.

PUA Przestrzeń Urbanistyka Architektura

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2017

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Vol. 2

45--56

PL

W artykule przedstawiono efekty współpracy samorządu gminy Zwierzyniec z uczelnią – Wydziałem Architektury Politechniki Krakowskiej. Efekty tej współpracy stanowią projekty dyplomowe inżynierskie studentów Wydziału Architektury. W publikacji omówiono problemy społeczne, gospodarcze i przestrzenno-inwestycyjne, z jakimi boryka się gmina Zwierzyniec. Jednym z podstawowych problemów omawianego terenu Roztocza jest jego „zamieranie” w sezonie jesienno-zimowym. Studenckie analizy, spostrzeżenia oraz finalne projekty mają służyć promocji Zwierzyńca i jego aktywizacji we wszystkich porach roku.

EN

The paper presents the results of the cooperation of the administration of the borough of Zwierzyniec with the shool – the Faculty of Architecture of the Cracow University of Technology. The effects of this cooperation are engineer-level diploma design theses developed by students of the Faculty of Architecture. Social, economic, spatial and construction-related problems that the borough of Zwierzyniec is facing have been discussed within the publication. One of the fundamental problems that the area in question is dealing with is the “freezing” of activity in it during the autumn-winter period. The students’ analyses, observations and final designs are to serve as a means of promoting Zwierzyniec and its activation throughout all the seasons of the year.

20

Idea Slow City jako metoda rewitalizacji i aktywizacji obszarów małych miast

Szymczak H., Kmiecik G.

Przegląd Budowlany

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2017

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R. 88, nr 9

70--71

PL

Obecnie nadal żyjemy w cieniu neoliberalnej doktryny, która upadła w 2008 roku, pozostawiając po sobie dużą skalę społecznych nierówności, głównie dzięki polityce wielkich banków i korporacji. Niestety globalny charakter gospodarki pociąga nas do współodpowiedzialności, często wbrew własnym przekonaniom przyczynialiśmy się do spekulacji cen żywności, inwestując w niewłaściwy fundusz emerytalny. Czy w globalnym świecie jest miejsce na autentyczność i świadome wybory? I czy ta postawa może być na przekór dotychczasowym tendencjom motorem do rozwoju obszarów zurbanizowanych?

EN

We are still living in the shadow of the neo-liberal doctrine which failed down in 2008, leaving behind a large scale of social inequality imposed by politic of large banks and corporations. Unfortunately, the global nature of the economy drives us to share responsibility, often, against our own convictions, we have contributed to the speculation of food prices by investing in the wrong pension fund. Is there a place for authenticity and conscious choices in global economy? Does this attitude can motivate spatial development in spite of the current tendency?