Log in

Relevant bibliographies by topics / Desorption kinetic / Journal articles

To see the other types of publications on this topic, follow the link: Desorption kinetic.

Journal articles on the topic 'Desorption kinetic'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Desorption kinetic.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Fouad, Mohamed R., Ahmed F. El-Aswad, and Maher I. Aly. "Mathematical models of the adsorption-desorption kinetics of fenitrothion in clay soil and sandy clay loam soil." Current Chemistry Letters 13, no. 4 (2024): 641–54. http://dx.doi.org/10.5267/j.ccl.2024.6.002.

Full text

Abstract:

Batch adsorption and desorption kinetic experiments of fenitrothion on clay soil and sandy clay loam soil indicated that the equilibration time was approximately 30 hours. The kinetics of adsorption and desorption exhibited two distinct stages: a rapid process in the initial stages followed by a slow process. The pseudo-first-order model followed by the Elovich kinetic model fit the experimental adsorption and desorption data quite well, with high values of R2 and low values of ∆qe% and SSE. Accordingly, the pseudo-first-order model is most suitable for describing the adsorption and desorption

APA, Harvard, Vancouver, ISO, and other styles

2

Li, Zhe, Suwei Xu, Ying Li, and Yuji Arai. "Novel Application of Hybrid Anion Exchange Resin for Phosphate Desorption Kinetics in Soils: Minimizing Re-Adsorption of Desorbed Ions." Soil Systems 4, no. 2 (2020): 36. http://dx.doi.org/10.3390/soilsystems4020036.

Full text

Abstract:

The process of phosphate desorption from soils is difficult to measure using stirred batch techniques because of the accumulation of desorbed ions in a bathing solution. To accurately measure the apparent rate coefficient of phosphate desorption from soils, it is necessary to remove the desorbed ions. In this study, a novel hybrid (i.e., iron oxide coated) anion exchange resin was used as a sink to study long-term (seven days) P desorption kinetics in intensively managed agricultural soils in the Midwestern U.S. (total phosphorus (TP): 196–419 mg/kg). The phosphate desorption kinetics in the h

APA, Harvard, Vancouver, ISO, and other styles

3

Rojas, Raquel, Guillermo Repetto, José Morillo, and José Usero. "Sorption/Desorption and Kinetics of Atrazine, Chlorfenvinphos, Endosulfan Sulfate and Trifluralin on Agro-Industrial and Composted Organic Wastes." Toxics 10, no. 2 (2022): 85. http://dx.doi.org/10.3390/toxics10020085.

Full text

Abstract:

The use of pesticides presents a risk to terrestrial and aquatic ecosystems. For this reason, the development of strategies to prevent and restore pollution is of the greatest interest, including the adsorption to organic matter. The aim of the present study was to investigate the sorption/desorption and kinetics of atrazine, chlorfenvinphos, endosulfan sulfate, and trifluralin onto several raw organic wastes by batch experiments. Three kinetic models were used to fit the obtained sorption kinetics data and two to fit the obtained adsorption isotherm data; both the Freundlich and pseudo-second

APA, Harvard, Vancouver, ISO, and other styles

4

Bozbag, Selmi Erim, Deniz Şanlı, Barkın Özener, Gökhan Hisar, and Can Erkey. "An Aging Model of NH3 Storage Sites for Predicting Kinetics of NH3 Adsorption, Desorption and Oxidation over Hydrothermally Aged Cu-Chabazite." Catalysts 10, no. 4 (2020): 411. http://dx.doi.org/10.3390/catal10040411.

Full text

Abstract:

A unified transient kinetic model which can predict the adsorption, desorption and oxidation kinetics of NH3 over hydrothermally aged Cu-chabazite was developed. The model takes into account the variation of fractional coverages of NH3 storage sites due to hydrothermal aging. In order to determine the fractional coverage of these sites, the catalyst was aged for various times at a certain temperature followed by NH3 adsorption, desorption and temperature-programmed desorption (TPD) experiments. TPD profiles were deconvoluted mainly into three peaks with centres at 317, 456 and 526 °C, respecti

APA, Harvard, Vancouver, ISO, and other styles

5

Eze, Kenneth Afamefuna, A. O. Eze, and J. C. Iyidobi. "SORPTION AND DESORPTION KINETICS OF CADMIUM IMMOBILIZATION IN LATERITE SOIL USING ANIMAL BONES." FUDMA JOURNAL OF SCIENCES 9, no. 2 (2025): 49–55. https://doi.org/10.33003/fjs-2025-0902-3103.

Full text

Abstract:

The sorption and desorption kinetics of cadmium immobilization in laterite soil using animal bones were investigated by subjecting the experimental data to various kinetic models. Sorption kinetic was studied with Pseudo first order, pseudo second order and parabolic diffusion while desorption kinetics was investigated with first order, Second order, and Simple Elovich Models. These models were chosen for their significance to understanding and optimizing the kinetics of immobilization processes, since they provide insights into the mechanisms driving sorption and desorption, allowing for the

APA, Harvard, Vancouver, ISO, and other styles

6

Ugrina, Marin, Nediljka Vukojević Medvidović, Jelena Perić, and Marina Trgo. "A study of kinetics and successive sorption/desorption of Zn and Cd uptake onto iron-modified zeolite." Clay Minerals 50, no. 1 (2015): 117–32. http://dx.doi.org/10.1180/claymin.2015.050.1.11.

Full text

Abstract:

AbstractThe sorption properties of iron-modified zeolite (IMZ) and the kinetics of zinc and cadmium uptake by the IMZ were investigated by the batch method. Two kinetic stages were observed, fast uptake up to 240 min, followed by slow uptake up to equilibrium. Kinetic results were fitted to the reaction and diffusion kinetic models, which indicated that intra-particle diffusion was the rate-limiting step. The Vermeulen’s approximation model was used to predict the quantity of Zn and Cd ions removed per gram of IMZ. The results of the successive sorption and desorption of Zn and Cd ions, with d

APA, Harvard, Vancouver, ISO, and other styles

7

Sinčić Modrić, Gordana, Mirna Petković Didović, Igor Dubrović, Paula Žurga, and Dalibor Broznić. "Those That Remain: Sorption/Desorption Behaviour and Kinetics of the Neonicotinoids Still in Use." International Journal of Molecular Sciences 24, no. 7 (2023): 6548. http://dx.doi.org/10.3390/ijms24076548.

Full text

Abstract:

In January 2023, the derogation loophole was closed on “emergency authorisations” for the use of three out of five neonicotinoids in all EU states. In this study, we analysed the sorption/desorption behaviour and kinetic parameters of acetamiprid and thiacloprid, the two neonicotinoids that are still approved for use, either regularly or under emergency authorisations in the EU, and widely used worldwide. Sorption and desorption curves in four soils with different organic matter content were analysed using four kinetic models, namely, Lagergren’s pseudo first-order model, two-site model (TSM),

APA, Harvard, Vancouver, ISO, and other styles

8

Nurul Aini, Olyvia Putri Wardhani та Iriany. "DESORPSI β-KAROTEN MINYAK KELAPA SAWIT (CRUDE PALM OIL) DARI KARBON AKTIF MENGGUNAKAN ISOPROPANOL". Jurnal Teknik Kimia USU 5, № 4 (2017): 1–7. http://dx.doi.org/10.32734/jtk.v5i4.1547.

Full text

Abstract:

The aim of the research is to study the ability of isopropyl alcohol in the desorption of β-carotene and to obtain kinetic model and desorption isoterm which is suitable in β-carotene desorption. The main material used were isopropyl alcohol and activated carbon containing β-carotene. The variabels used in this research are desorption temperature, activated carbon concentration and parameter observed is concentration of β-carotene in isopropyl alcohol. In the desorption process, activated carbon which adsorp β-carotene was soaked in isopropyl alcohol. To review the desorption kinetics, this re

APA, Harvard, Vancouver, ISO, and other styles

9

Elbana, Tamer A., and H. Magdi Selim. "Multireaction Modeling of Lead (Pb) and Copper (Cu) Sorption/Desorption Kinetics in Different Soils." Soil Systems 3, no. 2 (2019): 38. http://dx.doi.org/10.3390/soilsystems3020038.

Full text

Abstract:

Batch kinetic experiments were carried out to quantify and describe the sorption/desorption of Cu and Pb in ten soils that exhibited a wide range of properties. Sorption isotherms were quantified using the Langmuir equation, whereas modeling of sorption/desorption kinetics was described using multireaction model (MRM). Results revealed the nonlinear sorption behavior of Cu and Pb in all soils. The ten soils exhibited higher affinity to Pb (6.4 to 36.5 mmol kg−1) in comparison to Cu (3.6 to 22.4 mmol kg−1). Simulation of Cu and Pb kinetic data indicated that the rate of sorption reaction was tw

APA, Harvard, Vancouver, ISO, and other styles

10

Berez, A., F. Ayari, N. Abidi, G. Schäfer, and M. Trabelsi-Ayadi. "Adsorption-desorption processes of azo dye on natural bentonite: batch experiments and modelling." Clay Minerals 49, no. 5 (2014): 747–63. http://dx.doi.org/10.1180/claymin.2014.049.5.10.

Full text

Abstract:

AbstractThe purpose of this study was to determine whether a bentonite from the Gafsa deposit (western Tunisia) could be used to remove the Foron Blue 291 (FB) azo dye from wastewater. Batch adsorption and desorption experiments were conducted using untreated and purified bentonite and the influence of contact time, pH, adsorbent mass and temperature of the dye solution on the adsorption of FB was evaluated. Kinetic and isotherm data were fitted using two non-linear kinetic and two non-linear isotherm equations. In addition, the fits were evaluated using the coefficient of determination (R2) a

APA, Harvard, Vancouver, ISO, and other styles

11

Rahmah, Nur Lailatul, Siti Mazlina Mustapa Kamal, Alifdalino Sulaiman, Farah Saleena Taip, and Shamsul Izhar Siajam. "Kinetic Study of Total Phenolic Content from Piper betle Linn. Leaves Extract Using Subcritical Water." Sains Malaysiana 52, no. 6 (2023): 1737–47. http://dx.doi.org/10.17576/jsm-2023-5206-10.

Full text

Abstract:

The green plant-based extraction of phenolic compounds is still challenging and attractive due to their benefit. The mechanism controlling of desorption rate of phenolic compounds, measured as total phenolic content (TPC), from Piper betle Linn. (PBL) leaves using subcritical water, and a one-site kinetic desorption model (first order) was studied. One-site kinetic desorption model has well explained the extraction mechanism of phenolic compounds from PBL leaves using subcritical water through desorption and diffusion mechanism. This model fits with the experimental data and presents a good de

APA, Harvard, Vancouver, ISO, and other styles

12

Selim, H. M., and H. Zhu. "Atrazine Sorption–Desorption Hysteresis by Sugarcane Mulch Residue." Journal of Environmental Quality 34, no. 1 (2005): 325–35. http://dx.doi.org/10.2134/jeq2005.0325a.

Full text

Abstract:

ABSTRACTSorption and desorption kinetics are essential components for modeling the movement and retention of applied agricultural chemicals in soils and the fraction of chemicals susceptible to runoff. In this study, we investigated the retention characteristics of sugarcane (Saccharum spp. hybrid) mulch residue for atrazine (2‐chloro‐4‐ethylamino‐6‐isopropylamino‐1,3,5‐triazine) based on studies of sorption–desorption kinetics. A sorption kinetic batch method was used to quantify retention of the mulch residue for a wide range of atrazine concentrations and reaction times. Desorption was perf

APA, Harvard, Vancouver, ISO, and other styles

13

Korovin, Vadym, Oleksandr Valiaiev, Oleksandr Zontov, Larysa Zontova, Volodymyr Pilchyk, and Borys Pysmennyi. "Uranium (VI) sorption from sulphuric solutions by AM-p-2 anionite." E3S Web of Conferences 109 (2019): 00039. http://dx.doi.org/10.1051/e3sconf/201910900039.

Full text

Abstract:

Research results were presented for equilibrium and kinetics of uranium sorption by AM-p-2 strong-base anionite from model sulphuric solution. Kinetic experimental data agreed with the pseudo second-order model while equilibrium ones – with the modified Langmuir-Freundlich equation. Testing of the anionite including sorption-desorption process operations used at uranium-mining industrial facilities showed that the resin had high sorption-desorption characteristics.

APA, Harvard, Vancouver, ISO, and other styles

14

Wahba, Monier M., and Alaa M. Zaghloul. "Effect of soil properties on phosphate desorption from some cultivated soils in arid region." SAINS TANAH - Journal of Soil Science and Agroclimatology 21, no. 1 (2024): 32. http://dx.doi.org/10.20961/stjssa.v21i1.79310.

Full text

Abstract:

<p><span lang="EN-US">Kinetics of soil chemical processes is one of the most important areas in environmental chemistry for metals availability in soils and mechanisms of desorption. Phosphorus (P) is one of the most important macronutrients that control plant growth and crop production. The present study aims to evaluate the influences of soil properties of Alluvial (<em>Typic torrerets</em>) and calcareous (<em>Typic calcids</em>) on the Kinetics of P desorption using batch and anion exchange resin techniques used for P adsorption, which is highly correlat

APA, Harvard, Vancouver, ISO, and other styles

15

Cruz-Tirado, JP, Arnold Cabanillas, Raúl Siche, J. Espina, Leonardo Díaz-Sánchez, and Albert Ibarz. "Bleaching of sugar cane juice using a food-grade adsorber resin and explained by a kinetic model describing the variation in time of the content of adsorbate." Food Science and Technology International 24, no. 3 (2017): 264–74. http://dx.doi.org/10.1177/1082013217747711.

Full text

Abstract:

This work studies the adsorption of colored compounds in cane juice using a food-grade macroporous adsorber resin without functional groups. The adsorption equilibrium was studied through the adsorption isotherms at 30, 40, and 50 ℃. The absorbance at 420 nm was used to measure the concentration of colored compounds, which enables correlation of the residual concentration with the adsorbed concentration. Furthermore, the efficiency of the adsorption process was studied, from which it was observed that there was an improvement in efficiency with increasing resin content, while the increase in t

APA, Harvard, Vancouver, ISO, and other styles

16

Irigoyen, R. Martin Torrez. "Modeling of Freeze-drying Kinetics for Apple, Banana, and Strawberry." Nutrition and Food Processing 07, no. 13 (2024): 01–12. https://doi.org/10.31579/2637-8914/267.

Full text

Abstract:

Fresh apple, banana, and strawberry slices were frozen at -20°C and freeze-dried using a shelf temperature of 40°C. Theoretical expressions were developed to predict vapor transfer kinetics during both sublimation and desorption periods. For sublimation, a model that accounts for the increasing dried layer thickness was employed to predict the sublimation rate as a function of time. This model significantly improves upon the time equation found in literature without adding substantial complexity. For desorption period, an analytical solution of the unsteady-state diffusion equation was applied

APA, Harvard, Vancouver, ISO, and other styles

17

M.F. Ledoh, Sherlly, Hermania Em Wogo, and Siti Arianti S.A. "LAJU ADSORPSI DAN DESORPSI PARAQUAT PADA TANAH PERTANIAN DESA OESAO KECAMATAN KUPANG TIMUR." Molekul 5, no. 1 (2010): 1. http://dx.doi.org/10.20884/1.jm.2010.5.1.70.

Full text

Abstract:

The research about determination of kinetic adsorption and desorption rate of paraquat on agriculture area Oesao-east Kupang has been done. The aim of this research was to determine the kinetic of paraquat adsorption before and after saturated and to model the desorption. The research consisted of evaluation of the analitycal procedure for paraquat, pattern of soil kinetic adsorption and paraquat desorption. The result of procedure evaluation showed that reduced paraquat absorbed at λ maximum 606 nm and relative stability at 0-150 minutes. Constant of paraquat kinetic adsorption at natural sta

APA, Harvard, Vancouver, ISO, and other styles

18

S., N. Saha, C. Debnath N., and K. Sanyal S. "Phosphate adsorption-desorption kinetics in some acidic soils." Journal of Indian Chemical Society Vol. 78, Feb 2001 (2001): 86–88. https://doi.org/10.5281/zenodo.5849229.

Full text

Abstract:

Department of Agricultural Chemistry and Soil Science Bidhan Chandra Krishi Viswavidyalaya, Mohanpur-741 252, India <em>Manuscript received 23 September 1999, revised 22 September 2000. accepted 16 October 2000</em> The kinetics of phosphate (P) sorption/desorption processes belonging to Taxonomic classifications of Aerie Haplaquept, Typic Haplumbrept, Typic Haplustalf and Typic Paleustalf, have been studied. The data are fitted to a modified Freundlich type of kinetic equation and modified Elovich equation to yield P sorption rate coefficients, obtained during sorption and desorption run

APA, Harvard, Vancouver, ISO, and other styles

19

Reddy, Krishna N., and Martin A. Locke. "Sulfentrazone sorption, desorption, and mineralization in soils from two tillage systems." Weed Science 46, no. 4 (1998): 494–500. http://dx.doi.org/10.1017/s0043174500090950.

Full text

Abstract:

Sulfentrazone sorption kinetics, desorption, and mineralization were evaluated in surface 7.5 cm of soils collected from long-term conventional-till (CT) and no-till (NT) plots. The soils used were Miami silt loam and Drummer silty clay loam from Illinois and Dundee silt loam from Mississippi. Sulfentrazone sorption kinetics in Dundee silt loam CT and NT soils were adequately described by a simple two-site equilibrium/kinetic model. Rapid initial sorption (within 1 h) was followed by a slower sorption and equilibrium, largely achieved by 72 h of shaking, with a negligible increase in sorption

APA, Harvard, Vancouver, ISO, and other styles

20

Simon, Jean-Marc, and Guilherme Carneiro Queiroz da Silva. "Adsorption Kinetics Model of Hydrogen on Graphite." Entropy 27, no. 3 (2025): 229. https://doi.org/10.3390/e27030229.

Full text

Abstract:

A new kinetic equation for the adsorption and desorption of H2 on graphite is derived based on the adsorption and desorption equilibrium rates obtained from the molecular dynamics. These rates are proportional to the activity in the gas and the adsorbed phase and thus do not obey Langmuir kinetics. The new equation offers a new route for understanding experimental results. It is used to simulate the kinetics under different thermodynamic conditions, both isothermal and non-isothermal. The characteristic times of adsorption and desorption are in good agreement with the data from the literature.

APA, Harvard, Vancouver, ISO, and other styles

21

Liu, Yongfeng, Jianjiang Hu, Zhitao Xiong, Guotao Wu, and Ping Chen. "Improvement of the hydrogen-storage performances of Li–Mg–N–H system." Journal of Materials Research 22, no. 5 (2007): 1339–45. http://dx.doi.org/10.1557/jmr.2007.0165.

Full text

Abstract:

Li2MgN2H2 can reversibly store more than 5.5 wt% hydrogen. However, the high activation energy of hydrogen desorption poses a kinetic barrier for low-temperature operation. In this work, the composition of the Li–Mg–N–H system has been modified by the partial substitution of Mg or Li by Na. The changes in structure and hydrogen absorption/desorption kinetics have been investigated. It was found that the peak temperature for hydrogen desorption was decreased by ∼10 °C, and that the hydrogen absorption/desorption isotherms were also significantly changed. Furthermore, the activation energy calcu

APA, Harvard, Vancouver, ISO, and other styles

22

SMITH, R. SCOTT, and BRUCE D. KAY. "MOLECULAR BEAM STUDIES OF KINETIC PROCESSES IN NANOSCALE WATER FILMS." Surface Review and Letters 04, no. 04 (1997): 781–97. http://dx.doi.org/10.1142/s0218625x97000766.

Full text

Abstract:

Studies of the properties of crystalline ice and amorphous solid water are the focus of considerable diverse and interdisciplinary research. The reasons include understanding heterogeneous atmospheric processes, interstellar and cometary astrophysics, cryobiology, and the physics and chemistry of liquids. In this review we summarize our recent work using nanoscale ice films to characterize the kinetic behavior of crystalline ice and amorphous solid water. The adsorption, desorption, crystallization and diffusion kinetics of the nanoscale films are studies using molecular beam and programmed de

APA, Harvard, Vancouver, ISO, and other styles

23

Seyedvakili, Farnaz, and Mohammad Samipoorgiri. "Thermo-kinetic investigation of heavy metal ions adsorption onto lignin considering coupled adsorption–desorption mechanisms: Modeling and experimental validation." International Journal of Modeling, Simulation, and Scientific Computing 09, no. 02 (2018): 1850014. http://dx.doi.org/10.1142/s1793962318500149.

Full text

Abstract:

A coupled adsorption–desorption thermo-kinetic model is developed incorporating both adsorption and desorption reactions. A local pseudo-equilibrium condition at the interface of adsorbent and adsorbate bulk phases was used as isotherm equation which can even be applied for multi-pollutants scenarios. The developed model is then validated using collected experimental data of heavy metal ions (Pb, Cu, Cd, Zn, and Ni). Comparisons were made for a number of isotherm and kinetic models to examine the performance of the proposed model. The developed model revealed desirable accuracy and superiority

APA, Harvard, Vancouver, ISO, and other styles

24

Wehrung, Quentin, Enrico Destefanis, Caterina Caviglia, et al. "Experimental Modeling of CO2 Sorption/Desorption Cycle with MDEA/PZ Blend: Kinetics and Regeneration Temperature." Sustainability 15, no. 13 (2023): 10334. http://dx.doi.org/10.3390/su151310334.

Full text

Abstract:

CO2 sorption–desorption cycles with a methyldiethanolamine (MDEA)/piperazine (PZ) blend have been performed with a rotoevaporator. Similar to other CO2 separation technologies, the heating involved in MDEA/PZ solvent regeneration is the most energy-intensive step in the overall CO2 separation process. Thus, this study investigated the desorption kinetics under low-pressure (<200 mbar) and low-temperature conditions in the range from 308 to 363 K with the aim of reducing costs. The CO2 desorption time to unload the samples from ~2.35 mol/kg to below the threshold of 1 mol/kg was reduced from

APA, Harvard, Vancouver, ISO, and other styles

25

Al-Ameri, Baydaa H. A. "Boron Desorption Kinetic in Calcareous Soils." Journal of Agricultural Science 11, no. 5 (2019): 525. http://dx.doi.org/10.5539/jas.v11n5p525.

Full text

Abstract:

Boron release (desorption) is one of the important factors use in estimating fertilizers use efficiency and management of boron in agricultural soils and correlation soil properties with it availability to plant. Chemical kinetics for boron desorption experiment was carried out of boric acid (source for boron fertilizer) under controlled conditions in three calcareous soils (clay, loamy and sandy loam) from central Iraq at three temperatures (278, 298 and 308 Kelvin), by using six mathematical and empirical equations viz. Zero order, First order, Second order, Parabolic diffusion, Power functi

APA, Harvard, Vancouver, ISO, and other styles

26

Yu, Caoming, Fang Wang, Yunlei Zhang, et al. "H2 Thermal Desorption Spectra on Pt(111): A Density Functional Theory and Kinetic Monte Carlo Simulation Study." Catalysts 8, no. 10 (2018): 450. http://dx.doi.org/10.3390/catal8100450.

Full text

Abstract:

Theoretical investigation of the static and kinetic behaviors of H and H2 on metal surface plays a key role in the development of hydrogenation catalysts and new materials with high H2 storage capacity. Based on the density functional theory (DFT) calculation of H and H2 adsorption on Pt(111), H(a) adatom strongly interacts with surface Pt; while H2 weakly adsorbs on Pt(111). H(a) adatoms stably occupy the face-centered cubic sites on Pt(111) which agrees with the experimental LERS observations. By using kinetic Monte Carlo (kMC) simulation, the qualitative effects of the kinetic parameters on

APA, Harvard, Vancouver, ISO, and other styles

27

Carotenuto, Gianfranco. "How 'Hydrophilic Sites' Work in Water Adsorption/Desorption by Natural Clinoptilolite." European Journal of Engineering Research and Science 4, no. 3 (2019): 183–89. http://dx.doi.org/10.24018/ejers.2019.4.3.1197.

Full text

Abstract:

The kinetic mechanism of water adsorption/desorption on samples of natural clinoptilolite-K has been investigated by using an electrical method based on measurements of variation of AC current intensity during the time. In particular, a high-frequency sinusoidal voltage (5kHz) was applied to the sample (high frequency was required to avoid sample/electrode interface polarization phenomena) and the resulting AC micro-current intensity was monitored during the time. The sample was hydrated by exposition to a 75% humidity atmosphere, while dehydration was achieved by exposing the sample to activa

APA, Harvard, Vancouver, ISO, and other styles

28

Carotenuto, Gianfranco. "How 'Hydrophilic Sites' Work in Water Adsorption/Desorption by Natural Clinoptilolite." European Journal of Engineering and Technology Research 4, no. 3 (2019): 183–89. http://dx.doi.org/10.24018/ejeng.2019.4.3.1197.

Full text

Abstract:

The kinetic mechanism of water adsorption/desorption on samples of natural clinoptilolite-K has been investigated by using an electrical method based on measurements of variation of AC current intensity during the time. In particular, a high-frequency sinusoidal voltage (5kHz) was applied to the sample (high frequency was required to avoid sample/electrode interface polarization phenomena) and the resulting AC micro-current intensity was monitored during the time. The sample was hydrated by exposition to a 75% humidity atmosphere, while dehydration was achieved by exposing the sample to activa

APA, Harvard, Vancouver, ISO, and other styles

29

Spinicci, R. "Desorption kinetic parameters as deduced from temperature programmed desorption curves." Journal of Thermal Analysis 30, no. 1 (1985): 293. http://dx.doi.org/10.1007/bf02128137.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Brar, B. S., and A. C. Vig. "Kinetics of phosphate release from soil and its uptake by wheat." Journal of Agricultural Science 110, no. 3 (1988): 505–13. http://dx.doi.org/10.1017/s0021859600082071.

Full text

Abstract:

SummaryLaboratory and glasshouse experiments were conducted to study P release kinetics and uptake of P by wheat (Trilicum, aestivum L.) in ten benchmark soils of Punjab (India). Phosphorus desorption, determined by successive extraction with 0·01 m-CaCl2 solution, was lower in calcareous soils (group I) than in non-calcareous soils (group II). Desorption of surface P in soils followed pseudo-first-order kinetics. The values of the kinetic constant of desorption and the radial diffusion coefficient of P increased with the amount of added P in soils.A significant linear relationship between cum

APA, Harvard, Vancouver, ISO, and other styles

31

Filippova, Nadezhda L. "Kinetic-Diffusion-Controlled Adsorption and Desorption Kinetics on Planar Surfaces." Journal of Colloid and Interface Science 206, no. 2 (1998): 592–602. http://dx.doi.org/10.1006/jcis.1998.5771.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Barbero, Giovanni, Antonio M. Scarfone, and Luiz R. Evangelista. "The Kinetics of Sorption–Desorption Phenomena: Local and Non-Local Kinetic Equations." Molecules 27, no. 21 (2022): 7601. http://dx.doi.org/10.3390/molecules27217601.

Full text

Abstract:

The kinetics of adsorption phenomena are investigated in terms of local and non-local kinetic equations of the Langmuir type. The sample is assumed in the shape of a slab, limited by two homogeneous planar-parallel surfaces, in such a manner that the problem can be considered one-dimensional. The local kinetic equations in time are analyzed when both saturation and non-saturation regimes are considered. These effects result from an extra dependence of the adsorption coefficient on the density of adsorbed particles, which implies the consideration of nonlinear balance equations. Non-local kinet

APA, Harvard, Vancouver, ISO, and other styles

33

Zhang, Zhen Yu, Jun Meng, Shu Dang, Ming Chao Gao, and Wen Fu Che. "Research on Cadmium Adsorption-Desorption Dynamics of Biochar." Advanced Materials Research 726-731 (August 2013): 179–83. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.179.

Full text

Abstract:

This research studies the effect of cadmium adsorption-desorption kinetics with different pyrolysis temperature biochar. The biochar which derived from rice husk at 300°C, 400°C, 500°C temperature for 30 minutes were added into Cd2+ solutions of 0.5 mg/L, 2.5 mg/L and 5 mg/L respectively. The optimal model of cadmium adsorption desorption kinetic behavior is the Level 1 dynamic equation. Indicates the increasing Cd2+ adsorption ability of biochar with pyrolysis temperature rising. Biochar also shortens adsorption process at relatively low Cd2+ initical concentrations.

APA, Harvard, Vancouver, ISO, and other styles

34

Ермоченков and Mihail Ermochenkov. "Kinetics of drying and moistering of wood." Forestry Engineering Journal 6, no. 4 (2017): 161–67. http://dx.doi.org/10.12737/23451.

Full text

Abstract:

The article presents the results of experimental and computational studies of the kinetics of drying of different types of wood in a helium environment. Wood is considered as a multi-component composite, one component of which is free and bound moisture. A model describing the removal of bound moisture, as a set of direct (desorption) and reverse (sorption) processes is described. The experimental-computational method for determining the kinetic parameters of sorption is suggested. They are determined from the condition that the rate of sorption and desorption is equal with equilibrium moistur

APA, Harvard, Vancouver, ISO, and other styles

35

Ren, Jie, Yin Shan Lou, Hai Kuan Yuan, and Lian Shen. "Relationships Between Acidity and Catalytic Performance of Solid Acid in Synthesis of Linear Alkyl Benzene (LAB)." Advanced Materials Research 233-235 (May 2011): 1447–50. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.1447.

Full text

Abstract:

Through the benzene alkylation experiments with long chain olefin over solid acid catalysts activated at different temperature in the fixed-bed reactor, the kinetics of alkylation reaction and the deactivation kinetics of catalyst were established. The results showed that the activity and stability of catalyst decreased with increasing the activation temperature of catalysts. The reaction rate constant (k) and the deactivation rate constant (kd) of catalyst in kinetic models were also estimated through the optimization method, respectively. The acidity of catalyst was characterized by ammonia

APA, Harvard, Vancouver, ISO, and other styles

36

Luo, Li Jun, Ping Bao Ban, Xue Jiao Huang, and Jun Hong Li. "Functionalized Mesporous Silica with Ethylenediamine for Removal of Pb(II)." Applied Mechanics and Materials 395-396 (September 2013): 610–14. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.610.

Full text

Abstract:

Amine-functionalized mesporous silicas ((referred as NH2MS)) were synthesized by grafting with ethylenediamine. The obtained materials have been characterized by N2 adsorption desorption measurement (BET). Adsorption behaviors of the adsorbent for lead (containing effects factors, kinetics, isotherms, thermodynamics) were investigated. The result indicated that the obtained particles possessed mesoporous structrure. The Pb (II) adsorption isotherm and kinetic data fit Freundlich model and the pseudo second-order kinetic model respectively. the adsorption of Pb (II) onto NH2-MS was an enothermi

APA, Harvard, Vancouver, ISO, and other styles

37

Jansson, Mats, Mats Jonsson, and Joel Mohlén. "Kinetic evaluation of sorption and desorption." Adsorption 16, no. 3 (2010): 155–59. http://dx.doi.org/10.1007/s10450-010-9208-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Kanervo, J. M., K. M. Reinikainen, and A. O. I. Krause. "Kinetic analysis of temperature-programmed desorption." Applied Catalysis A: General 258, no. 2 (2004): 135–44. http://dx.doi.org/10.1016/j.apcata.2003.08.019.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Dedov, A. V., N. V. Chernousova, and V. A. Zakharova. "Modeling of kinetics of drug desorption from tablet based on polymer matrix." All the Materials. Encyclopedic Reference Book., no. 1 (January 2024): 26–30. http://dx.doi.org/10.31044/1994-6260-2024-0-1-26-30.

Full text

Abstract:

Using the literature data, a model has been developed to predict the kinetics of desorption of a drug from a tablet based on hydroxypropyl methylcellulose at different water mixing rates. Upon contact of the tablet with gastric juice, the polymer swelled with the formation of a gel-like shell, which prevents the transfer of gastric juice into the tablet and determines the release rate of the drug into the human body. An equation was used that describes the kinetic dependences of the desorption of a drug in the coordinate system of a conditional time equal to the square root of the observation

APA, Harvard, Vancouver, ISO, and other styles

40

Liu, Ting Yue, Su Shuang Nie, Tiao Yin, Xiao Ling Xu, and Chao Ying Shao. "Studies on Dynamic Adsorption and Desorption of Total Flavonoids with Ion-Exchange Fiber." Advanced Materials Research 415-417 (December 2011): 2016–23. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.2016.

Full text

Abstract:

The adsorption and desorption property of total flavonoids with ion-exchange fiber were studied. The kinetic study on dynamic adsorption and desorption indicates that the adsorption and desorption property of fiber is function of the concentration、pH value and flow velocity of column liquid. Flavonoids can be effectively desorbed by ethanol.

APA, Harvard, Vancouver, ISO, and other styles

41

Kim, Yanghwa, Ocktaeck Lim, and Hongsuk Kim. "Determination of Chemical Kinetic Parameters for Adsorption and Desorption of NH3 in Cu-Zeolite Used as a DeNOx SCR Catalyst of Diesel Engines." Catalysts 12, no. 8 (2022): 917. http://dx.doi.org/10.3390/catal12080917.

Full text

Abstract:

Ammonia-based selective catalytic reduction is one of the most effective NOx reduction technologies for diesel engines, but its low NOx reduction efficiency under low-temperature conditions needs further improvement. Previous studies have broadened our understanding of the NH3 adsorption and desorption that occurs in an SCR catalyst of Cu ion-exchanged zeolite. However, many studies conducted to data on the control of the NH3 adsorption and desorption in SCR catalysts have considered a simple chemical reaction related to a single acid site. This study demonstrates a detailed process for determ

APA, Harvard, Vancouver, ISO, and other styles

42

Ibarz, A., S. Garza, A. Garvín, and J. Pagan. "Kinetics of Peach Clarified Juice Discoloration Process with an Adsorbent Resin." Food Science and Technology International 14, no. 5_suppl (2008): 57–62. http://dx.doi.org/10.1177/1082013208095327.

Full text

Abstract:

This paper deals with the effects of adsorbent resin upon kinetic process of peach juice adsorption de-coloration at different temperatures ranged from 10 °C to 50 °C. The adsorption equilibrium was quantified by means of adsorption isotherms in the range from 10 °C to 50 °C. Absorbance data at 420 nm were used to plot all the isotherms, which correlated reasonable well with the Freundlich and Langmuir isotherms. Also, the efficiency of the adsorption process was studied for different resin/juice ratios at different temperatures, from which it was observed that there was a notable improvement

APA, Harvard, Vancouver, ISO, and other styles

43

Hu, Qili, Nan Chen, Chuanping Feng, Jing Zhang, Weiwu Hu, and Long Lv. "Kinetic studies of nitrate removal from aqueous solution using granular chitosan-Fe(III) complex." Water Science and Technology 73, no. 5 (2015): 1211–20. http://dx.doi.org/10.2166/wst.2015.596.

Full text

Abstract:

In the present study, a granular chitosan-Fe(III) complex was prepared as a feasible adsorbent for the removal of nitrate from an aqueous solution. There was no significant change in terms of nitrate removal efficiency over a wide pH range of 3–11. Nitrate adsorption on the chitosan-Fe(III) complex followed the Langmuir–Freundlich isotherm model. In order to more accurately reflect adsorption and desorption behaviors at the solid/solution interface, kinetic model I and kinetic model II were proposed to simulate the interfacial process in a batch system. Nitrate adsorption on the chitosan-Fe(II

APA, Harvard, Vancouver, ISO, and other styles

44

Elkhatib, E. A., A. M. Mahdy, and N. H. Barakat. "Thermodynamics of copper desorption from soils as affected by citrate and succinate." Soil and Water Research 2, No. 4 (2008): 135–40. http://dx.doi.org/10.17221/2110-swr.

Full text

Abstract:

Desorption of Cu and low molecular weight dissolved organics are the primary factors that impact fate and transport of Cu in soils. To improve predictions of the toxicity and threat from Cu contaminated soil, it is critical that time-dependent desorption behaviour be understood. In this paper, the effect of organic ligands citrate and succinate on the kinetics of Cu desorption from contaminated soils varying widely in soil characteristics was investigated at three different temperatures. The results showed that the first order equation adequately described the kinetics of Cu desorption from cl

APA, Harvard, Vancouver, ISO, and other styles

45

G., Gizer, Puszkiel Julián, Victoria C. astro Riglos Maria, et al. "Improved kinetic behaviour of Mg(NH2)2-2LiH doped with nanostructured K-modified-LixTiyOz for hydrogen storage." Nature Scientific Reports 10 (January 7, 2020): 8. https://doi.org/10.1038/s41598-019-55770-y.

Full text

Abstract:

The system Mg(NH2)2 + 2LiH is considered as an interesting solid-state hydrogen storage material owing to its low thermodynamic stability of ca. 40 kJ/mol H2 and high gravimetric hydrogen capacity of 5.6 wt.%. However, high kinetic barriers lead to slow absorption/desorption rates even at relatively high temperatures (>180 °C). In this work, we investigate the effects of the addition of K-modified LixTiyOz on the absorption/ desorption behaviour of the Mg(NH2)2 + 2LiH system. In comparison with the pristine Mg(NH2)2 + 2LiH, the system containing a tiny amount of nanostructured K-modifie

APA, Harvard, Vancouver, ISO, and other styles

46

Mejías, Carmen, Juan Luis Santos, Julia Martín, Irene Aparicio, and Esteban Alonso. "Thermodynamic and Kinetic Investigation of the Adsorption and Desorption of Trimethoprim and Its Main Metabolites in Mediterranean Crop Soils." Molecules 28, no. 1 (2023): 437. http://dx.doi.org/10.3390/molecules28010437.

Full text

Abstract:

The adsorption–desorption processes of organic pollutants into the soil are one of the main factors influencing their potential environmental risks and distribution in the environment. In the present work, the adsorption–desorption behavior of an antibiotic, trimethoprim (TMP), and two of its main metabolites, 3-desmethyltrimethoprim (DM-TMP) and 4-hydroxytrimethoprim (OH-TMP), were assessed in three Mediterranean agricultural soils with different physicochemical characteristics. Results showed that the adsorption kinetic is performed in two steps: external sorption and intraparticle diffusion

APA, Harvard, Vancouver, ISO, and other styles

47

Wang, Zhihong, Zhigang She, Mijun Peng, Qiuling Yang, and Tao Huang. "Determining the adsorption and desorption properties of flavonoids found in Eucommia ulmoides Oliv. leaves using macroporous resin and acetylcholinesterase inhibitor screening." BioResources 16, no. 1 (2020): 470–91. http://dx.doi.org/10.15376/biores.16.1.470-491.

Full text

Abstract:

The adsorption and desorption properties of 12 resins containing flavonoid compounds found in Eucommia ulmoides Oliv. leaves (EUOL) extracts were investigated. The static adsorption and desorption, kinetic, adsorption, and thermodynamic properties of the adsorption of the flavonoids onto macroporous resins were determined. The HPD-300, NKA-9, and AB-8 resins exhibited a greater adsorption capacity and desorption characteristics. A pseudo-second-order kinetic model was suitable to characterize the kinetics of the adsorption of flavonoids onto the resins selected, and the diffusion of flavonoids

APA, Harvard, Vancouver, ISO, and other styles

48

Dickbreder, Tobias, Ralf Bechstein, and Angelika Kühnle. "Crucial impact of exchange between layers on temperature programmed desorption." Physical Chemistry Chemical Physics 23, no. 34 (2021): 18314–21. http://dx.doi.org/10.1039/d1cp01924d.

Full text

Abstract:

Kinetic modelling shows that layer exchange between the 1st and 2nd adsorbate layer on a surface alters the appearance of desorption spectra considerably. Especially, a rapid layer exchange causes a broader desorption peak and a flatter leading edge.

APA, Harvard, Vancouver, ISO, and other styles

49

Moshfegh, A. Z., and K. H. Zakeri. "The Kinetic Study of H2S Formation and Desorption on the S/Pt(111) Surface by Computer Simulation." Surface Review and Letters 10, no. 05 (2003): 745–50. http://dx.doi.org/10.1142/s0218625x03005542.

Full text

Abstract:

In this investigation, we have studied the kinetics and mechanism of formation and desorption of H 2 S on the Pt (111) surface using a kinetic random walk model. The effect of temperature on the H 2 S formation was studied in the range of 85–150 K. It was observed that a maximum amount of H 2 S is formed at 90 K and the amount is reduced at higher temperatures. H 2 S production yield as a function of time at different initial sulfur coverage ranging from 0.02 to 0.33 ML (1 ML ≃ 1 × 1015 atoms/cm 2) was also examined. It was obvious that as the initial S coverage increases, the rate of H 2 S fo

APA, Harvard, Vancouver, ISO, and other styles

50

Xu, Jun, Songtao Liu, and Chuanmin Chen. "A Comparative Study of Microwave and Resistance Heating for the Efficient Thermal Desorption of Mineral Oil from Contaminated Soils." Sustainability 16, no. 18 (2024): 8222. http://dx.doi.org/10.3390/su16188222.

Full text

Abstract:

The contamination of soils by mineral oils presents a significant environmental challenge, particularly due to the widespread use of petroleum products in various industrial sectors. This study investigates the efficiency of microwave heating compared to conventional resistance heating for the thermal desorption of mineral oil from contaminated soils. The experimental results demonstrated that microwave heating offers superior performance in terms of pollutant removal efficiency, energy consumption, and the preservation of soil’s physical and chemical properties. This study further conducted a

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!