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Tytuł:
A Novel Bio-Waste Incorporated Alginate Sorbent for De-Fluoridation of Water
Autorzy:
Ayyappan, C. S.
Sreeja, S.
Bhalambaal, V. M.
Powiązania:
https://bibliotekanauki.pl/articles/124891.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
tamarind seeds
defluoridation
sodium alginate
column study
water purification
Opis:
This study evaluates the feasibility of using tamarind (Tamarindus indica) seed powder for de-fluoridation of fluoride contaminated water. Batch study confirmed that tamarind seeds in dry powder form could remove 87% of fluoride from water. This bio-sorbent can be used effectively in areas where fluoride concentrations are above the permissible limits of 1.5 mg·l-1 as per WHO Standard, 1984. Tamarind seed powder was incorporated in a matrix of sodium alginate and made into gel-beads. The beads were tested for de-fluoridation efficiency by conducting column studies. The effect of various factors, such as flow rate, retention time, and the number of runs on the efficacy of fluoride removal was also studied. The results revealed that flow rate did not seem to have much effect on the percentage fluoride removal but the fluoride concentration decreased drastically upon greater retention time and multiple runs.
Źródło:
Journal of Ecological Engineering; 2015, 16, 4; 8-13
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Annual cycle of phytoplankton community through the water column: Study applied to the implementation of bivalve offshore aquaculture in the Southeastern Bay of Biscay
Autorzy:
Muniz, O.
Revilla, M.
Rodriguez, J.G.
Laza-Martinez, A.
Fontan, A.
Powiązania:
https://bibliotekanauki.pl/articles/47941.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
phytoplankton community
water column
open water
bivalve
biomass
chlorophyll a
nutrient
hydrographic condition
environmental variability
Biscay Bay
Źródło:
Oceanologia; 2019, 61, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of the effect of operating parameters in column flotation using experimental design
Autorzy:
Bedekovic, G.
Powiązania:
https://bibliotekanauki.pl/articles/110943.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
froth flotation
column flotation
coal
experimental design
operating parameters
Opis:
The effect of air flow rate, pulp density and particle size was studied using central composite design for coal samples from the Lazy mine. Evaluation of column flotation tests was based on two dependant variables such as ash content and combustible matter recovery in the concentrate. The ash content in the concentrate was from 4.61 to 9.62% with the recovery of combustible matter from 17.43 to 81.98%. The ANOVA statistical analysis showed that the main effect of air flow rate has a significant impact on the combustible matter recovery and ash content in the concentrate. The main effect of pulp density on the combustible matter recovery is significant, whereas for the ash content it is not seen. There is a strong effect of the particle size on the ash content and combustible matter recovery in the concentrate. The interaction of the effect of the pulp density and particle size has a significant impact on the ash content in the concentrate.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 2; 523-535
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stress-strain model study of ferrous tailing concrete short column restraint by hooping
Autorzy:
Li, Sujuan
Kang, Hongzhen
Powiązania:
https://bibliotekanauki.pl/articles/972321.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
ferrous tailing
restraint concrete
short column
stress-strain model
Opis:
This study analyzed the stress–strain curve of stirrup restraint ferrous tailing concrete by test and theoretical analysis. Twenty short column in strength grade 5 are used in the test with WC30, WC35, WC40, WC45 and WC50. The stress–strain data is achieved after the axial compression behavior test. It is found from the stress–strain curve that the stress–strain relationship is similar with natural sand concrete. Moreover, the whole stress–strain curve equation of stirrup restraint ferrous tailing concrete is put forward. The calculation results show that the data calculating by the equation are in good agreement with the experimental data.
Źródło:
Mining Science; 2019, 26; 241-248
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The experimental study of glass multilayer columns using digital image correlation
Autorzy:
Demchyna, B.
Surmai, M.
Tkach, R.
Powiązania:
https://bibliotekanauki.pl/articles/378961.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
laminated glass column/glass multilayer column
digital image correlation
triplex
layer glass
glass column
korelacja obrazu cyfrowego
szkło warstwowe
kolumna szklana
Opis:
Purpose: The purpose of the research is to study the deformability of glass multilayer columns at the central compression using digital image correlation. It becomes possible to use the method of digital image correlation for the experimental study of load bearing building structures of glass. Design/methodology/approach: The approach which has been used to solve the above problems is to conduct an experimental study of glass columns on central compression, in which deformations were measured using digital image correlation. Findings: The possibility of using load bearing building structures of glass triplex has been discovered. A program of experimental studies was developed. It included the testing of prototype samples on central compression with rigid fastening. On the basis of the obtained results, a graph of dependence of relative deformations on normal tension, graphs of the dependence of the bending of columns on load in different planes, and a modulus of elasticity of triplex glass have been determined. Research limitations/implications: The lack of a calculation methodology and regulatory documents for designing load bearing building structures of triplex glass increases their cost, since each project is individual and requires the experimental research. Practical implications: Using the approaches developed in the paper, the method of digital image correlation, which is to measure deformations when testing glass structures on central compression can be applied. Originality/value: The experimental study is probably the first one in which deformations of glass columns are determined using the method of digital image correlation, so it is new and original. The lack of a calculation methodology and regulatory documents for designing load bearing building structures of triplex glass, increases their cost, since each project is individual and requires the experimental research.
Źródło:
Archives of Materials Science and Engineering; 2019, 96, 1; 32-41
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on gas holdup characteristics of micro-bubble countercurrent contacting flotation column
Autorzy:
Han, Jikang
Wang, Weizhi
Li, Ran
Powiązania:
https://bibliotekanauki.pl/articles/1449071.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
column flotation
conductance method
pressure drop method
gas holdup
GE-609
Opis:
In order to explore the gas holdup distribution of the microbubble countercurrent contact flotation column in the hematite column cationic reverse flotation process, respectively using conductance method and pressure drop method for air and water as experimental medium characteristics research of flotation column, the research group carries on the gas holdup, examines the aeration quantity, the fill medium and cation collector alkyl polyamine ether (An amine collector―GE609 which consists of four elements: carbon, hydrogen, oxygen and nitrogen)within the column on the influence of the axial and radial gas holdup. The results show that the axial gas holdup from the bottom of the column to the top of the column increases with the increase of height in the range of 0.050.07dm3/s. The radial distribution of gas holdup generally shows the distribution law of “intermediate high, low on both sides”. After the filling medium is added into the column, the radial gas holdup is evenly distributed compared with the empty column, and the gas holdup is increased. Due to the high foaming performance of GE-609, the gas holdup in the column can be increased by changing the amount of aeration and the concentration of the reagent, which can exceed 60% at the maximum. Like other alcohol foaming agents, as time passes, the effect of GE-609 weakens and the gas holdup in the column gradually decreases. The addition of quantitative HCl can improve the foaming performance of GE-609, and the gas holdup in the column is significantly improved and the stability is enhanced.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 4; 665-675
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on bubble characteristics of flotation column in hematite reverse cationic flotation process
Autorzy:
Wang, Weizhi
Han, Jikang
Powiązania:
https://bibliotekanauki.pl/articles/1450070.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
column flotation
bubble generator
GE-609
circularity
bubble diameter
bubble Sauter diameter
Opis:
In the self-designed flotation column simulation system, the foaming characteristics of the micro-bubble countercurrent contact flotation column used in the hematite cation column flotation process are systematically studied. The objective of this study is to investigate the bubble generation by a bubble generator in the flotation column. The bubble image was obtained by the high-speed camera recorder, and the bubble diameter was calculated and analyzed by image processing software. The distribution characteristics of the bubble size under different aeration conditions and with different reagent concentrations were investigated. The results show that as the aeration increases, the average diameter bubbles increases, the bubble size distribution changes from narrow to wide, and the number of small bubbles decreases. The cationic collector GE-609 can change the bubble shape. As the concentration increases, the bubble shape gradually changes from an irregular shape to a standard spherical shape. When the concentration of GE-609 exceeds 2.5 mg/dm3, the average circularity C of the bubbles in the bubble group stabilizes at 1, and the increase in concentration no longer changes the bubble shape. GE-609 also has an efficient foaming effect, as the concentration increases, the bubble diameter distribution changes significantly, the proportion of small bubbles increases, and the proportion of large bubbles decreases significantly. When the critical concentration is exceeded, the bubble diameter distribution probability density peak width no longer changes significantly. Compared with the two types of alcohol foaming agents, GE-609 produces a bubble Sauter diameter close to that of 2-octanol and slightly lower than terpineol.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 1; 64-75
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of bubble-particle interactions in a column flotation process
Autorzy:
Cheng, G.
Shi, C.
Yan, X.
Zhang, Z.
Xu, H.
Lu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/109635.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
particle
bubble
column flotation
collision
attachment
detachment
Opis:
Bubble-particle interactions play an important role in flotation. This study examines the behaviour of bubble clusters in a turbulent flotation cell. Particularly, the bubble-particle interaction characteristics in flotation are investigated. The bubble size in a flotation column was measured using an Olympus i-SPEED 3 high-speed camera. Relationships between the circulating volume, bubble size and bubble terminal velocity were discussed. Probabilities of collision, attachment, detachment and acquisition between bubbles and particles in different circulating volumes were calculated based on the flotation kinetic theory. Using the extended Derjaguin–Landau–Verwey–Overbeek (EDLVO) theory, the relationship between the potential energy and distance in bubble-particle interaction was analysed. The results demonstrated that as the circulating volume increased, the bubble size and velocity decreased. When the circulating volume increased from 0.253 to 0.495 m3/h, the bubble diameter decreased from 511 to 462 μm, and the corresponding bubble velocity decreased from 43.1 to 37.5 mm/s. When the circulating volume remained constant as the particle size increased, probabilities of collision, attachment, detachment and acquisition increased. When the particle size remained constant as the circulating volume increased, these probabilities also increased. At a constant circulating volume as the particle size increased, the absolute value of the total potential energy between the particle and bubble increased. When the distance between the bubble and particle was 30 nm, the energy barrier appeared.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 1; 17-33
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and numerical study on the classification of a cyclonic field in a flotation column
Autorzy:
Li, Xiaoheng
Li, Xiao
Yan, Xiaokang
Wang, Lijun
Zhang, Haijun
Powiązania:
https://bibliotekanauki.pl/articles/109487.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
computational fluid dynamics
cyclonic flow field
cyclonic-static micro-bubble flotation column
particle size distribution
Opis:
The cyclonic-static micro-bubble flotation column (FCSMC) performs well in fine mineral flotation. Compared to traditional flotation columns, its design innovatively introduces a cyclonic structure. The separation of middling and tailing occurs in the cyclonic flow field induced by a cyclonic reversal cone. In this study, the particle size distribution analysis and computational fluid dynamics (CFD) simulations were conducted to reveal the particle distribution law and the classification mechanism in cyclonic flow fields under different circulation pressures. The results showed that particle size showed the same distribution tendency as tangential velocity in the radial direction: both increase from the center and decrease around the wall. As circulation flux increased, the tangential velocity increased, and the particle size differences in the radial direction also increased. The position of the largest particles will move to outside as the largest value of tangential velocity migrates the outward in the radial direction. According to the particle size distribution of the feed, it can be adjusted to the flow field to change the particle distribution, thereby improving the efficiency of separation. This study has an important guiding significance for column design and adjustment of the operating parameters of the flotation process.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 3; 421-431
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical study on the dynamic response of a concrete filled steel tubular long column under axial impact by a rigid-body
Autorzy:
Qi, Han
Chen, Shuohui
Zou, Jianlei
Zhang, Huidi
Liu, Mengsha
Ju, Jinsan
Sang, Xiuxing
Powiązania:
https://bibliotekanauki.pl/articles/2055059.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
concrete filled steel tubular long column
rigid body
impact load
dynamic response
Opis:
In this study, refined finite element models of concrete filled steel tubular long columns with length diameter ratio (L/D) of 50 were established, and their dynamic responses under a rigid-body impact were explored. It is found that the form of impact load is only related to and can be predicted from the impact velocity of the rigid-body. The change of axial stress and strain with time is synchronous with that of the impact load. Furthermore, the variation characteristics of axial stress and strain with time are mainly related to the initial velocity of the rigid-body.
Źródło:
Journal of Theoretical and Applied Mechanics; 2021, 59, 4; 551--563
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the cohesive soil stiffness in a modified resonant column
Badanie sztywności gruntu spoistego w zmodyfikowanej kolumnie rezonansowej
Autorzy:
Sas, W.
Soból, E.
Gabryś, K.
Markowska-Lech, K.
Powiązania:
https://bibliotekanauki.pl/articles/394989.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
kolumna rezonansowa
grunt spoisty
moduł ścinania
ścinanie skrętne
piezoelementy rodzaju bender
resonant column
cohesive soil
shear modulus
torsional shear
bender elements
Opis:
The expansion of cities encourages designers and engineers to build increasingly sophisticated skyscrapers and underground structures. Such complicated projects require more reliable soils parameters. Dynamic parameters of the soils are commonly used for the purposes of civil engineering design. The resonant column is one of the most reliable devices allowing the above-mentioned soil properties to be obtained. In this article, the authors studied a dynamic parameter shear modulus G of the cohesive soil clayey sand. Researchers conducted their own examination, using a modified resonant column, which is equipped with bender elements and a torsional shear device. The studied material was an undisturbed cylindrical sample of the cohesive soil clayey sand (clSa) from a depth of 6 m from the village of Kociszew. In order to calculate the maximum shear modulus, the authors have employed two types of time-domain techniques to measure shear wave velocities, namely the first peak to peak and start-to-start methods. In bender elements test authors investigate shear wave velocity in a range of period from 0.01 to 0.1 ms and 14 V amplitude, which gave a wave length from about 0.1 to 3.5 cm. In the case of torsional shear tests, researchers examined ten cycles of sinusoidal torsional excitation with 1 Hz frequencies and amplitude from 0.004 to 1 V. The research performed indicated that the results obtained by using the torsional shear and first peak to peak methods are in very good agreement, while the overestimation of the results obtained by using the start-to-start method reached up to 27%.
Rozwój miast wymusza na projektantach i wykonawcach budowanie coraz wyższych wieżowców, a także coraz bardziej skomplikowanych konstrukcji podziemnych. Dla tak wyrafinowanych projektów potrzebne są jak najbardziej wiarygodne parametry gruntowe. W dzisiejszych czasach inżynierowie powszechnie korzystają z dynamicznych parametrów gruntu. Jednym z najpopularniejszych i jednocześnie najbardziej wiarygodnych aparatów do uzyskiwania wspomnianych wyżej właściwości jest kolumna rezonansowa. W tym artykule autorzy zbadali dynamiczny parametr jakim jest moduł ścinania. Badania zostały przeprowadzone na nienaruszonej cylindrycznej próbce piasku ilastego (clSa), która pochodziła z 6 m głębokości z miejscowości Kociszew. Autorzy prowadzili badania w zmodyfikowanej kolumnie rezonansowej, która wyposażona jest zarówno w piezoelementy rodzaju bender jak i urządzenie do ścinania skrętnego. Użyto dwóch metod do interpretacji sygnału w odbiorniku w testach piezoelementami rodzaju bender, mianowicie technikę „pierwszego szczytu” i metodę „od startu do startu”. W testach elementami bender przebadano fale porzeczne o okresie około 0,01 do 0,1 ms i amplitudzie 14 V, co przełożyło się na długość fal od około 0,1 do 3,5 cm. W badaniu ścinania skrętnego użyto 10 cykli sinusoidalnego wzbudzania o częstotliwości 1 Hz i amplitudzie od 0,004 do 1 V. Z prze- prowadzonych badań wynika, ze wyniki uzyskane metodą „pierwszego szczytu” pokrywały się z tymi uzyskanymi za pomocą ścinania skrętnego, natomiast metoda „od startu do startu” zawyżała wyniki nawet do 27%.
Źródło:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN; 2016, 93; 21-33
2080-0819
Pojawia się w:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of deuteron motion in a filamentary Plasma-Focus pinch column for different configurations of filaments
Autorzy:
Pasternak, A.
Sadowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/146934.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
deuterons
filamentary pinch
ion trajectories
numerical modeling
plasma focus
Opis:
The motion of deuterons in dynamical filamentary configurations of a PF pinch column has been studied with a three-dimensional numerical model. Apart from magnetic fields, the motion-induced electrical fields as well as ion-ion and ion-electron collisions have been included in the equations of deuteron motion. Calculations were performed for different numbers of filaments and its spatial distributions under different initial conditions. Energy of ions was assumed to be from 10 keV up to 200 keV. The results obtained have shown many possible modes of ion motion and have demonstrated that the current filaments can cause peculiarities observed in the angular distribution of deuterons emitted from the PF pinch column.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 29-32
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study on heavy metals mobility from zinc plant residues in Iran
Autorzy:
Moradkhani, D.
Eskandari, S.
Sedaghat, B.
Najafabadi, M. R.
Powiązania:
https://bibliotekanauki.pl/articles/110826.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
heavy metals
zinc leaching plant
leaching filter cake
column leaching
Opis:
The transport of heavy metals from mining disposal site to groundwater and surface water is one of the most serious environmental problems in the world. The transport of heavy metals such as Zn, Cd and Mn from leaching filter cake in RECo, Zanjan, Iran was examined by using column leaching. Parameters studied included: flow rate, pH of input solution and leaching time. In this study, the maximum dissolution percents of Zn, Cd and Mn in input solution pH of 5 were 45.50 %, 53.97% and 19.94%, respectively. To statistically analysis the experimental results, SPSS14 software was employed. The results of SPSS 14 indicated that for the Zn, Cd and Mn dissolution, time and flow rate were found respectively, the effective parameters for the pollution in zinc leach residues.
Źródło:
Physicochemical Problems of Mineral Processing; 2013, 49, 2; 567-574
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza czynnikowa zdolności do obrotu użebrowanego połączenia doczołowego belki do słupa
Autorzy:
Ostrowski, K.
Kozłowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/390760.pdf
Data publikacji:
2014
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
zdolność do obrotu
analiza czynnikowa
analiza MES
plan eksperymentu numerycznego
parametric study on the rotation capacity of stiffened end-plate beam-to-column connection
rotation capacity
parametric study
FEM analysis
experiment design
Opis:
Zdolność do obrotu węzłów konstrukcji stalowych jest jedną z cech podatnościowych węzła, niezbędną do uwzględnienia rzeczywistego zachowania się węzła w analizie konstrukcji. Ma to szczególne znaczenie nie tylko w odniesieniu do konstrukcji analizowanych metodami teorii plastyczności, ze względu na możliwość tworzenia się przegubów plastycznych w węzłach, ale także przy projektowaniu w zakresie sprężystym, aby określić bezpieczny zakres odkształcalności węzłów. W artykule przedstawiono wyniki analizy czynnikowej zdolności do obrotu przeprowadzonej na przykładzie doczołowego, nieużebrowanego połączenia śrubowego rygla do słupa. Ocenie poddano wpływ podstawowych czynników zmiennych wpływających na zdolność do obrotu, jakimi są: grubość blachy czołowej węzła „tp”, poziomy rozstaw śrub „w” oraz odległość śrub od górnej powierzchni półki „cg1”. Analizę wykonano przy zastosowaniu metody elementów skończonych, w oparciu o plan eksperymentu numerycznego.
Rotation capacity is one of the joint parameters needed to be taken into account of the real joint behaviour in a global analysis. It has a special influence on the plastic design of steel frames. The results of the parametric study of the stiffened bolted end-plate beam-to-column connection have been presented in the paper. The main investigated parameters are: thickness of end plate “tp”, horizontal bolt spacing “w” and distance of the bolt to plate edge “cg1”. The analysis was performed with the use of finite element method, based on the numerical experiment plan.
Źródło:
Budownictwo i Architektura; 2014, 13, 3; 267-274
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Packed bed column adsorption of oil and grease from refinery desalter effluent, using rice husks derived carbon as the adsorbent: Influence of process parameters and Bohart–Adams kinetics study
Autorzy:
Umembamalu, Chinedu Josiah
Igwegbe, Chinenye Adaobi
Osuagwu, Emmanuel Ugochukwu
Nwabanne, Joseph Tagbo
Powiązania:
https://bibliotekanauki.pl/articles/1031584.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Adsorption
Bohart–Adams kinetics
Crude oil
Oil and grease
Packed bed column
desalter effluent
Opis:
Oil and grease (O&G) adsorption in a packed bed column, using adsorbent prepared from rice husks wastes, was investigated. The effects of adsorbent particle size (150, 300, and 600 µm), initial adsorbate concentration (200, 300, and 400 mg/L), and bed height (100, 200, and 300 mm) on the performance of column adsorption for O&G removal and breakthrough time were investigated in the packed column experiments at a constant flow rate of 10.5 mL/min. The kinetic behavior of the column adsorption process was analyzed using the Bohart–Adams model. The kinetic data fitted the model very well. The rate constant (mass transfer coefficient) for Bohart–Adams model (KAB) increased with the decrease in adsorbent particle size and initial ion concentration but was higher at the bed height of 200 mm. The maximum adsorption capacity (No) increased with a decrease in particle size and initial ion concentration but increased with an increase in the bed height. The rate constant for Bohart–Adams model decreased with an increase in adsorbent size and initial concentration, and was higher at the bed height of 200 mm. The time required for 90% breakthrough decreased with increase in the flow rate, bed height, and initial ion concentration. The model results of the O&G breakthrough curve concentration have shown a fairly good agreement with experimental results. This analysis, considering the adsorbent’s particle size, feed concentration, and bed heights indicated that the packed bed unit could be used for the treatment of O&G effluent to reduce the difficulties of oil refineries in Nigeria and other countries.
Źródło:
World News of Natural Sciences; 2020, 31; 155-174
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 29

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