Wszystkie pola: adsorption - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Adsorption effectiveness and adsorption efficiency of chosen surfactants
Autorzy:: Rekiel, Edyta Ada
Powiązania:: https://bibliotekanauki.pl/articles/2079921.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:: surfactants
biosurfactants
adsorption
adsorption effectiveness
adsorption efficiency
Opis:: Surfactants are various types of chemical compounds that are present in almost every aspect of our life. They are used in many branches of industry, especially in food, cosmetics, pharmaceuticals and even in confectionery. They are considered one of the best solutions for oil residues, soil bioremediation and dealing with PAHs contaminations. Their versatility comes from their amphiphilic build – one part of the compound has hydrophilic properties (head), the other has hydrophobic properties (tail). This fact causes surfactants affinity both to polar and nonpolar compounds. Some of the classical surfactants still can affect fauna and flora by accumulating in ground waters or simply by causing allergies. In that case, many companies decide to limit their surfactant usage and reach for substances present in nature which have very similar, if not better, properties. Biosurfactants are surface active agents produced mainly by microorganisms such as bacteria, fungi and yeasts. There are many papers related to different properties (CMC, aggregation number, surface excess concentration) of various types of surfactants. However, it is difficult to find papers describing the same properties for different surfactants. In this study, adsorption effectiveness and adsorption efficiency at the water-air interface of chosen surfactants: sodium dodecylsulfate (SDDS), cationic: cetyltrimetylammonium bromide (CTAB), nonionic: Triton X-100 (TX-100) and biosurfactants: surfactin (SF) and monorhamnolipid (RL) has been compared. Both efficiency and effectivenes decide about the practical surfactants application.
Źródło:: Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2019, 74, 2; 25-39
2083-358X
Pojawia się w:: Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Adsorption Potential Theory for Description of n-Butane Adsorption on Activated Carbon
Autorzy:: Bałys, Mieczysław
Szczurowski, Jakub
Czepirski, Leszek A.
Kochel, Marek
Powiązania:: https://bibliotekanauki.pl/articles/764132.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:: adsorption
activated carbon
butane adsorption, adsorption potential therory
heat of adsorption
Opis:: Potential theory of adsorption was used for description of adsorption isotherms of n-butane on microporous active carbon. It was shown that characteristic curve of adsorption can be treated as specific form of thermal equation of adsorption giving the possibility to calculate and predict both equilibrium and thermodynamic characteristics of adsorption in wide range of temperature and relative pressure. The results can be used for the design of adsorption systems and for predicting adsorption equilibrium behavior of binary and/or multicomponent gaseous mixtures on active carbon under wide range of conditions, without time consuming and expensive experimental determination.
Źródło:: Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2016, 71, 2
2083-358X
Pojawia się w:: Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Removal of quinoline using various particle sizes anthracite: adsorption kinetics and adsorption isotherms
Autorzy:: Xu, Hongxiang
Sun, Xianfeng
Yu, Yuexian
Liu, Guowei
Ma, Liqiang
Huang, Gen
Powiązania:: https://bibliotekanauki.pl/articles/109567.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: adsorption isotherm
anthracite
particle size
quinoline adsorption kinetics
Opis:: This work provided an adsorption method of the removal of quinoline by using anthracite of various particle sizes. The characteristics of the adsorbents were analyzed by Camsizer XT for particle size analysis, FT-IR for functional groups, X-ray diffusion for mineralogical composition, Brunauer-Emmett-Teller for specific surface area and Barrett-Joyner-Halenda for pore size distribution. The average particle size of AC1-AC4 were 0.0342 mm, 0.1015 mm, 0.2103 mm and 0.3815 mm, respectively. The specific surface of the AC1-AC4 were 3.5 m2·g-1, 1.5 m2·g-1, 0.7 m2·g-1 and 0.1 m2·g-1 respectively. The adsorption capacity present a linear increase with the specific surface area increasing. To reveal the process of the adsorption, the adsorption kinetics and isotherms were performed. The kinetics data were analyzed by pseudo-first-order, pseudo-second-order and intra-particle diffusion equation using linearized correlation coefficient. Pseudo-second-order was found to best represent the kinetics data, which indicated that the adsorption of quinoline onto anthracite belongs to chemisorption. The equilibrium isotherms data were analyzed by Langmuir model and Freundlich model, the results indicated that the Freundlich model fit well for all the adsorption processes, which showed that the adsorption of quinoline onto anthracite belongs to endothermic reaction.
Źródło:: Physicochemical Problems of Mineral Processing; 2019, 55, 1; 196-207
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Kinetics of marine surfactant adsorption at an air-water interface. Baltic Sea studies
Autorzy:: Pogorzelski, S.J.
Kogut, A.D.
Powiązania:: https://bibliotekanauki.pl/articles/48394.pdf
Data publikacji:: 2001
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: coastal water
water interface
surface adsorption
marine film
kinetics
Baltic Sea
adsorption barrier
adsorption
Opis:: The paper contains the results of studies of natural surface film adsorption kinetics carried out in inland waters and in shallow offshore regions of the Baltic Sea during 2000–01 under calm sea conditions. The novel approach presented here for the adsorption dynamics is based on the mixed kinetic-diffusion model and analyses of the surface pressure-time plots at short (t → 0) and long (t→∞) adsorption time intervals. Values of the effective relative diffusion coefficient Deff/D (= 0.008 − 0.607) and energy barrier for adsorption Ea/RT (= 0.49 − 7.10) agree well with the data reported for model non-ionic surfactant solutions of pre-cmc concentrations. Wind speed is one of the factors affecting the adsorption barrier via the increased surface pressure of the natural film exposed to wind shear stress (∼ U10 2),a nd enters the relation Ea/RT = 1.70U10 1/3.
Źródło:: Oceanologia; 2001, 43, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Experimental study on the adsorption refrigeration device built on a water-silica gel working pair
Autorzy:: Szelągowski, Adam
Trzcinkowski, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/132051.pdf
Data publikacji:: 2019
Wydawca:: Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:: adsorption refrigeration
adsorption
water-silicagel
Opis:: Due to increasing restriction put on compressor based cooling, adsorption cooling has been increasing its popularity. Abovementioned restrictions forces usage of ecological refrigerants, such as water. Additional advantage of adsorption devices is possibility to use low-grade waste heat source or solar energy as the main driving energy instead of electricity. This trend has lead to significant development of adsorption based branch in cooling industry over past 30 years. The paper presents the results of experimental research for an adsorption refrigeration device built of two deposits. Water-silica gel was chosen as the working pair, because this solution allows to work at the lowest drive temperatures. As a result of the experiment, EER coefficients were obtained at the level of 0.57-0.82 and SCP coefficients in the range from 8 to 21 W/kg. The results allow to conclude that adsorption devices can, in many cases compete with compressor solutions.
Źródło:: Modern Engineering; 2019, 1; 42-54
2450-5501
Pojawia się w:: Modern Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Analiza uproszczonych równań dynamiki adsorpcji
Analysis of simplified equations of adsorption dynamics
Autorzy:: Piekarski, J.
Dąbrowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/400993.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: adsorpcja
uproszczone równania adsorpcji
adsorption
simplified adsorption equations
Opis:: W zależności od układu, w jakim realizowany jest proces adsorpcji, do jego matematycznego opisu można zastosować równania kinetyki, statyki oraz dynamiki adsorpcji. Najbardziej ogólnym modelem do opisu przebiegu procesu adsorpcji w układzie porcjowym jest model oparty o równanie pola stężeń adsorbatu w wewnętrznej strukturze absorbentu. Dynamika adsorpcji rozpatruje czasowo-przestrzenny rozkład adsorbatu w złożu adsorpcyjnym. W niniejszej publikacji przedstawiono analizę oraz praktyczne wykorzystanie wybranych równań dynamiki procesu adsorpcji do obliczania czasu pracy złoża sorbentu w układzie przepływowym.
Depending on the system, in which the adsorption process is implemented, equations of kinetics, statics and dynamics of adsorption can be applied for its mathematical description. The most general model used for description of adsorption process in the batch system is a model based on field equation of adsorbate concentration in the internal structure of the absorbent. Dynamics of adsorption examines the time-spatial distribution of adsorbate in the adsorbent bed. This publication presents analysis and practical use of selected dynamics equations of adsorption process for calculation of working time of sorbent deposits of in a flow system.
Źródło:: Inżynieria Ekologiczna; 2011, 24; 164-173
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Synthesis, Characterization and Cr(VI) Adsorption Properties of Modified Magnetite Nanoparticles
Autorzy:: Çıftçı, H.
Ersoy, B.
Evcın, A.
Powiązania:: https://bibliotekanauki.pl/articles/1031143.pdf
Data publikacji:: 2017-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: nanomagnetite
adsorption
Cr(VI)
Langmuir
Freundlich
adsorption kinetics
Opis:: In this study, magnetite (Fe₃O₄) nanoparticles were synthesized by chemical co-precipitation method, coated with silica, and then the surface of silica coated magnetite (Fe₃O₄@SiO₂) nanoparticles was modified with (3-aminopropyl)triethoxysilane (APTES) at first. Secondly, attained nanoparticles were characterized by the Fourier transform infrared, X-ray diffraction, transmission electron microscopy, the Brunauer-Emmett-Teller, vibrating sample magnetometer, and zeta-sizer devices/methods. Finally, detailed adsorption experiments were performed to remove hexavalent chromium (Cr(VI)) from aqueous media by synthesized nanoparticles. Mean size and specific surface area of synthesized nanoparticles were about 15 nm and 89.5 m²/g, respectively. The highest adsorption capacity among used adsorbents (Fe₃O₄, Fe₃O₄@SiO₂, Fe₃O₄@SiO₂@L) was attained by Fe₃O₄ nanoparticles and it was determined that adsorption capacity of the other two adsorbents was too low when compared to the Fe₃O₄ nanoparticles. Optimum conditions for Cr(VI) adsorption by Fe₃O₄ nanoparticles were: pH, 3; temperature, 55°C; contact time, 90 min; adsorbent concentration, 0.5 g/l and initial Cr(VI) concentration 10 mg/l. Under these conditions, adsorption capacity and removal percentage of Cr(VI) were found to be 33.45 mg/g and 88%, respectively.
Źródło:: Acta Physica Polonica A; 2017, 132, 3; 564-569
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Adsorpcja wody na silikażelu w adsorpcyjnych urządzeniach chłodniczych
Water adsorption on silica gel in adsorption chillers
Autorzy:: Gwadera, M.
Powiązania:: https://bibliotekanauki.pl/articles/2072477.pdf
Data publikacji:: 2013
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: chłodzenie adsorpcyjne
silikażel
adsorption cooling
silica gel
Opis:: Sprawność chłodziarek adsorpcyjnych wykorzystujących układ silikażel- woda można zwiększyć m.in. zmniejszając opór cieplny na granicy złoże adsorbentu/rurki wymiennika ciepła. W pracy przedstawiono wyniki pomiarów podstawowych wielkości wpływających na zdolność adsorpcyjną silikażelu w stanie ziarnistym i po naniesieniu na powierzchnię metalu. Nie stwierdzono istotnego pogorszenia zdolności adsorpcyjnej w wyniku naniesienia ziaren przy użyciu spoiw opartych na alkoholu poliwinylowym.
Efficiency of silica gel-water adsorption chillers can be increased by the reduction of thermal resistance between an adsorbent bed and heat exchanger tubes. Measurement results of quantities influencing the adsorption capacity of silica gel in a granular form and after consolidation with a metal surface were presented. Significant deterioration of adsorption capacity resulting from pellets’ consolidation with a metal surface with the use of polyvinyl alcohol solutions was not noticed.
Źródło:: Inżynieria i Aparatura Chemiczna; 2013, 4; 317--318
0368-0827
Pojawia się w:: Inżynieria i Aparatura Chemiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Removal of quinoline from aqueous solutions by lignite, coking coal and anthracite. Adsorption kinetics
Autorzy:: Xu, H.
Wang, Y.
Huagn, G.
Fan, G.
Gao, L.
Li, X.
Powiązania:: https://bibliotekanauki.pl/articles/110664.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: quinoline adsorption
coking coal
kinetics
adsorption activation energy
coal adsorption
Opis:: Basing on the concept of circular economy, a novel method of industrial organic wastewater treatment by using adsorption on coal is introduced. Coal is used to adsorb organic pollutants from coking wastewaters. After adsorption, the coal would be used in its original purpose, as its value was not reduced and the pollutant was reused. Through the systemic circulation of coking wastewater zero emissions can be achieved. Lignite, coking coal and anthracite were used as adsorbents in batch experiments. The quinoline removal efficiency of coal adsorption was investigated. Both the coking coal and anthracite exhibited properties well-suited for quinoline adsorption removal. The experimental data were fitted to the pseudo-first- order and pseudo-second-order kinetic equations as well as intraparticle diffusion and Bangham models. An attempt was made to find the rate-limiting step involved in the adsorption processes. Both boundary-layer diffusion and intraparticle diffusion are likely involved in the rate-limiting mechanisms. Effect of pH on coal adsorptions by coking coal was investigated. The process of quinoline adsorption on coal was researched. The coal adsorption method for removing refractory organic pollutants is a great hope for achieving wastewater zero emission for coking plants.
Źródło:: Physicochemical Problems of Mineral Processing; 2016, 52, 1; 397-408
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Studies of gentamycin adsorption on chitosan
Autorzy:: Meler, Jan
Grimling, Bożena
Pluta, Janusz
Powiązania:: https://bibliotekanauki.pl/articles/1035211.pdf
Data publikacji:: 2013
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: Gentamycin
adsorption
chitosan
Opis:: Chitosan as a dietary supplement has been used in the treatment of obesity due to its capability of binding bioactive compounds. A molecule of a cationic polymer, such as chitosan, may bind gentamycin. The aim of the study was to determine the binding capability of Gentamycin by chitosan’s contained in weight-loss supplements. The Gentamycin absorption was investigated by means of a dynamic method in a biopharmaceutical model imitating in vitro conditions including the required level of nutrients. Mean absorption of gentamycin by chitosan ranged from 2,1% to 34,1% depending on the environmental pH. The highest absorption rate was observed at above pH 6,8. Concluding, the studies confirmed that the investigated gentamycin interact with chitosan, what leads to decrease in their amount and affects the bioavailability of the drugs.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2013, 18, 18; 175-179
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

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