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AdsorptionSurface PropertiesBentoniteSilicon DioxideSurface TensionAluminum SilicatesPolystyrenesCharcoalSurface-Active AgentsHydroxyapatitesGlassMembranes, ArtificialBacteriophagesBiofoulingHydrogen-Ion ConcentrationAirWaterSolutionsSerum Albumin, BovineHydrophobic and Hydrophilic InteractionsKineticsPorosityColloidsPolymersWater PurificationTemperatureZeolitesGoldThermodynamicsKaolinCoated Materials, BiocompatibleCelluloseModels, ChemicalMicroscopy, Atomic ForceQuartz Crystal Microbalance TechniquesSilica GelChitosanCetrimonium CompoundsPhotoelectron SpectroscopyEnzymes, ImmobilizedDurapatiteQuartzReceptors, VirusActinomycesPulmonary SurfactantsPolyethylene GlycolsAluminum HydroxideElectrochemistryMicropore FiltersStatic ElectricityTetraphenylborateSilanesGraphiteBiocompatible MaterialsViral Plaque AssayMuramidaseAcrylic ResinsSpectroscopy, Fourier Transform InfraredLipid BilayersBuffersWater Pollutants, ChemicalSewageResins, SyntheticHemofiltrationIonsPhosphatidylcholinesDiatomaceous Earth
IsothermLangmuirIsothermsKineticsIndicated the adsorption process was exothermicMechanismThermodynamicsDesorptionParametersSuggest that the adsorptionAdsorbentSorptionIons from Aqueous SolutionsExothermicMoleculesEntropySpontaneousStudiesTemperatureMethylene BluePorousZeoliteSurfactantsProcessFavorableGeochemicalInhibitionExperimental dataDataInteractionsStudyCapacityFeasiblePredictionEfficiencyExperimentsHazardousPropertiesTemperatures
Isotherm15
  • Isotherm, kinetic and thermodynamic study of tetracycline adsorption were investigated. (researchsquare.com)
  • also the adsorption isotherm is described by the bulk micro-pore filling theory (BFM) equations. (e3s-conferences.org)
  • Adsorption isotherms of boron on Fe(OH)3 were determined and correlated with isotherm equations such as Langmuir, Freundlich and D-R models. (csircentral.net)
  • The adsorption of boron preferably fits with Langmuir adsorption isotherm suggesting monolayer coverage of adsorbed molecules. (csircentral.net)
  • Irving Langmuir was the first to derive a scientifically based adsorption isotherm in 1918. (wikipedia.org)
  • It is the most common isotherm equation to use due to its simplicity and its ability to fit a variety of adsorption data. (wikipedia.org)
  • The adsorption behavior of 8QSC on copper metal in acid medium obeyed the Langmuir isotherm. (amrita.edu)
  • The equilibrium of adsorption was modeled by using the Langmuir and Freundlich isotherm models. (journalcra.com)
  • Three models were employed to describe experimental adsorption isotherm data: Langmuir, Freundlich and Temkin equations. (dpublication.com)
  • Studies of adsorption on biologically derived materials typically include direct measurement of either the adsorption isotherm or the heat of adsorption, but not both. (cdc.gov)
  • The adsorption of Cu$^{2+}$ on nanocomposites followed the Langmuir isotherm model well. (tubitak.gov.tr)
  • Additionally, the fitting of isotherm data by the Dubinin-Radushkevich model showed that the adsorption process occurred by physisorption mechanism. (tubitak.gov.tr)
  • Thermodynamic studies indicated that the adsorption is physical, which is consistent with the results of the isotherm models. (scialert.net)
  • The adsorption of inhibitor on the iron surface obeyed the Langmuir adsorption isotherm equation. (emerald.com)
  • Adsorption data were well described by the Langmuir isotherm and subsequently optimised using a second-order regression model by implementing face-centred CCD of Response Surface Methodology (RSM). (intechopen.com)
Langmuir1
  • Adsorption isotherms (Langmuir, Freundlich and Dubinin-Radushkevich (D-R)) and thermodynamic parameters were calculated and obtained data were evaluated. (scialert.net)
Isotherms3
  • Kinetics and Isotherms of Dazomet Adsorption on Natural Adsorbents"" J. Braz. (ijser.org)
  • The adsorption of gases and solutes is usually described through isotherms, that is, the amount of adsorbate on the adsorbent as a function of its pressure (if gas) or concentration (for liquid phase solutes) at constant temperature. (wikipedia.org)
  • The sorption isotherms are useful to determine and compare thermodynamic properties of passion fruit pulp powder processed by different drying methods. (scielo.br)
Kinetics5
Indicated the adsorption process was exothermic2
  • These indicated the adsorption process was exothermic, feasible and spontaneous in the removal of the Pb (II) ion. (azjournalbar.com)
  • Thermodynamic parameters indicated the adsorption process was exothermic reaction. (scirp.org)
Mechanism7
  • The correlation between adsorption-energy characteristics is found, and the molecular mechanism of ammonia adsorption in Na 2,87 ZSM-5 and Li 3,37 ZSM-5 zeolites in the whole filling region is revealed. (e3s-conferences.org)
  • Guo L., Qi C., Zheng X., Zhang R., Shen X., Kaya S., Toward understanding the adsorption mechanism of large size organic corrosion inhibitors on an Fe (110) surface using the DFTB method. (e3s-conferences.org)
  • Alaneme K.K., Olusegun S.J., Adelowo O.T., Corrosion inhibition and adsorption mechanism studies of Hunteria umbellata seed husk extracts on mild steel immersed in acidic solutions. (e3s-conferences.org)
  • The adsorption behavior and the mechanism of a CO 2 /CH 4 mixture in shale organic matter play significant roles to predict the carbon dioxide sequestration with enhanced gas recovery (CS-EGR) in shale reservoirs. (mdpi.com)
  • In the present work, the adsorption performance and the mechanism of a CO 2 /CH 4 binary mixture in realistic shale kerogen were explored by employing grand canonical Monte Carlo (GCMC) and molecular dynamics (MD) simulations. (mdpi.com)
  • The mechanism of adsorption is also highly complex and difficult to model and simulate using conventional mathematical modelling due to the interaction of more number of adsorption process variables 11 . (scialert.net)
  • A three site adsorption mechanism, with S1, S2 and S3 representing the adsorption sites with an increasing order of strength, was assumed to develop a transient kinetic model for the SO 2 storage/release over Al 2 O 3 and Pt/Al 2 O 3 . (confex.com)
Thermodynamics1
  • Thermodynamics of adsorption of three pesticides using a kinetic approach was investigated. (ijser.org)
Desorption6
  • [4] The term sorption encompasses both adsorption and absorption, and desorption is the reverse of sorption. (wikipedia.org)
  • Geochemical processes such as adsorption/desorption, precipitation/dissolution, and chemical transformations control V concentrations in groundwater. (usgs.gov)
  • The concentration of radium in natural water is usually controlled by adsorption-desorption reactions with minerals and rocks and by the solubility of radium-containing minerals. (cdc.gov)
  • It works with solar radiation and the cooling is achieved by means of a thermodynamic adsorption-desorption cycle lasting 24 hours. (phys.org)
  • We are developing methods that take into account thermodynamic and kinetic factors to tailor the physical and structural properties of the surface, helping us understand the mechanisms behind biological material adsorption and desorption. (csbsju.edu)
  • This research requires a high level of surface characterization to fully examine the mechanisms behind biological material adsorption/desorption, therefore it will provide much needed information for the use and development of biosensors, biomedical implants, and other biotechnologies. (csbsju.edu)
Parameters10
  • The full geometry optimization, electric field gradient, NBO analysis, thermodynamic properties, electronical parameters, and IR spectrum were carried out by the density functional theory (DFT) with three parameter hybrid functionals of Becke B3LYP and the 6-311++g(2d,2p) basis set. (nanochemres.org)
  • Thermodynamic parameters, such as standard Gibb's free energy (G◦), standard enthalpy (H◦) and standard entropy (S◦), were also evaluated by Van't Hoff equation. (csircentral.net)
  • Herein, a semi-analytical thermodynamic model is applied to determine the conditions required for NGA, including their sensitivity towards various system-specific parameters, and investigate the correlation with pressure-induced breathing. (ugent.be)
  • In addition, thermodynamic parameters consisting of enthalpy, entropy, and activation energy were calculated too. (ac.ir)
  • The thermodynamic parameters of the adsorption processes were calculated and discussed. (amrita.edu)
  • The thermodynamic parameters such as ΔG°, ΔH° and ΔS° were determined for the adsorption of MB. (dpublication.com)
  • The removal efficiency of the adsorbent is to be considered an output layer and the adsorption parameters such as pH, time, initial concentration, temperature etc., are to be considered an input layer of the ANN model. (scialert.net)
  • The effect of the temperature on the corrosion behavior of iron in 1 M HCl without and with inhibitor is studied in the temperature range (298‐333 K). This work also attempts to correlate thermodynamic and kinetic parameters with the inhibition effect. (emerald.com)
  • The inhibition effect was satisfactorily explained by both thermodynamic and kinetic parameters. (emerald.com)
  • Thermodynamic parameters suggest that the adsorption is a typical physical process, spontaneous, enthalpy driven and exothermic in nature. (intechopen.com)
Suggest that the adsorption1
  • Δ G and Δ H being negative suggest that the adsorption was thermodynamically favorable and spontaneous. (iwaponline.com)
Adsorbent6
  • Consequently, it is highly desirable that Fe 3 O 4 @MC/APTMS magnetic nano-biocomposite could be used as a promising adsorbent for TC adsorption from aqueous solutions. (researchsquare.com)
  • Citrus limetta peel powder is cheap, effective and potential adsorbent for Congo red adsorption from wastewater. (iwaponline.com)
  • [3] While adsorption does often precede absorption, which involves the transfer of the absorbate into the volume of the absorbent material, alternatively, adsorption is distinctly a surface phenomenon, wherein the adsorbate does not penetrate through the material surface and into the bulk of the adsorbent. (wikipedia.org)
  • The various factors affecting adsorption, such as initial metal ion concentration, contact time, adsorbent dose and effect of temperature, were evaluated. (journalcra.com)
  • The batch equilibrium technique was employed to study the effect of initial concentration (800 mg/L), contact time (90 min) and temperature (313 K) on the adsorption capacity of the prepared adsorbent. (azjournalbar.com)
  • Adsorption experiments were conducted as a function of adsorbent dosage, contact time, pH and reaction temperature. (scirp.org)
Sorption2
  • Adsorption, ion exchange and chromatography are sorption processes in which certain adsorbates are selectively transferred from the fluid phase to the surface of insoluble, rigid particles suspended in a vessel or packed in a column. (wikipedia.org)
  • Thermodynamic analysis suggests that the sigmoidal water sorption is induced by the affinity alternation of the pore surface from hydrophobic to hydrophilic. (nature.com)
Ions from Aqueous Solutions1
  • This study aimed to investigate and explore the possibility of using eggshell powder (ES) and natural hydroxyapatite (HAp) derived from chicken bone for adsorption of Sr(II) ions from aqueous solutions. (scialert.net)
Exothermic1
  • It was noticed that the adsorption of SY on MgO was exothermic and spontaneous at low temperatures. (ac.ir)
Molecules6
  • It was determined that the average molar entropy of ammonia adsorption on NaZSM-5 and LiZSM-5 zeolites indicates that the mobility of ammonia molecules in the zeolite is below the liquid phase and close to the mobility of the solid phase, indicating a strong limitation of mobility of ammonia adsorbed on the cations. (e3s-conferences.org)
  • The protonated part of hydroxyl and carboxyl group of CLPP combine with negative part of Congo red dye for adsorption of dye molecules. (iwaponline.com)
  • Adsorption is the adhesion [1] of atoms , ions or molecules from a gas, liquid or dissolved solid to a surface . (wikipedia.org)
  • Brunauer, Emmett and Teller's model of multilayer adsorption is a random distribution of molecules on the material surface. (wikipedia.org)
  • Adsorption of dye molecules on different positions of the B3O3 nanosheet leads to the. (researchgate.net)
  • The porous architecture allows adsorption of guest molecules with high efficiency, which is advantageous for rapid detection of the guest molecules. (nature.com)
Entropy1
  • Based on the values of entropy changes (ΔS) (50.04 J/mol k), the enthalpy changes (ΔH) (9.26 kJ/mol), and the negative Gibbs free energy changes (ΔG), the adsorption process was endothermic, random, and spontaneous. (researchsquare.com)
Spontaneous1
Studies4
  • However, studies regarding the coupled effect of hard ions and surfactant adsorption are very limited. (asme.org)
  • The studies of thermodynamic behaviour revealed negative values for ∆Go (-26.7036 to -28.1252 kJ/mol), and negative values for ∆Ho (-15.5796 kJ/mol) and ∆So (0.03554 kJ/mol/k) respectively. (azjournalbar.com)
  • These studies are limited in the literature although there is no study about the artificial neural networks was used for modeling of adsorption of Sr(II) from aqueous solutions by eggshell and bone ash. (scialert.net)
  • Based on thermodynamic data and laboratory studies, V concentrations are expected to be highest in samples collected from oxic and alkaline groundwater. (usgs.gov)
Temperature4
  • Thus, we observed that in the presence of hard ions, surfactant adsorption increases with the increase in temperature, which is due to the surge in kinetic energy. (asme.org)
  • Specifically, the effects of shale organic type and maturity, temperature, pressure, and moisture content on pure CH 4 and the competitive adsorption performance of a CO 2 /CH 4 mixture were investigated. (mdpi.com)
  • It was found that pressure and temperature have a significant influence on both the adsorption capacity and the selectivity of CO 2 /CH 4 . (mdpi.com)
  • The effects of contact time, initial concentration of Cu$^{2+}$, initial pH of Cu$^{2+}$ solutions, and temperature on adsorption process were investigated. (tubitak.gov.tr)
Methylene Blue1
  • The adsorption capacity of shells of apricot kernels (SAK) of N'gaous -Algeria, a low-cost and locally available biomaterial, for methylene blue (MB) removal from aqueous solutions was examined using a batch process. (dpublication.com)
Porous1
  • Soft porous crystals (SPCs) are widely known for their intriguing properties and various counterintuitive phenomena such as negative linear compression, negative thermal expansion and negative gas adsorption (NGA). (ugent.be)
Zeolite2
  • From the adsorption thermokinetics, it was determined that Li + cations are located in the screened positions of the ZSM-5 zeolite crystal lattice. (e3s-conferences.org)
  • The adsorption of ammonia molecule results in Li + cations migration from the zeolite lattice into junctions formed by the intersection of straight and zigzag channels and the formation of ion/molecular complexes of various multiplicity in them. (e3s-conferences.org)
Surfactants2
  • We also observed that a reduction in hardness reduces the adsorption of surfactants. (asme.org)
  • The adsorption of surfactants in the metal surface can markedly change the corrosion resisting property of the metal. (emerald.com)
Process9
  • The exact nature of the bonding depends on the details of the species involved, but the adsorption process is generally classified as physisorption (characteristic of weak van der Waals forces ) or chemisorption (characteristic of covalent bonding). (wikipedia.org)
  • Adsorption is present in many natural, physical, biological and chemical systems and is widely used in industrial applications such as heterogeneous catalysts , [8] [9] activated charcoal , capturing and using waste heat to provide cold water for air conditioning and other process requirements ( adsorption chillers ), synthetic resins , increasing storage capacity of carbide-derived carbons and water purification . (wikipedia.org)
  • Pseudo-second-order model was found to define the adsorption process better than the pseudo-first-order equation. (dpublication.com)
  • In addition, ANN model is an effective technique in modeling, estimation and prediction of adsorption process for Sr(II) ions onto ES and BA-HAp. (scialert.net)
  • Among various treatment methods adsorption process is one of the most effective and economically feasible alternative methods used to remove metal ions from waste solutions. (scialert.net)
  • The ANN is one of the data based non-traditional tools for modeling of the adsorption process. (scialert.net)
  • The adsorption process followed the pseudo-second-order kinetic model. (intechopen.com)
  • Overnight, the cooling process is achieved, and the adsorption and evaporation period occurs. (phys.org)
  • The adsorption process continues all night until morning. (phys.org)
Favorable1
Geochemical1
  • The developed thermodynamic-based geochemical model is compared and validated with recent core-flooding data. (asme.org)
Inhibition1
  • So the study of the relation between the adsorption and corrosion inhibition is of a great importance. (emerald.com)
Experimental data1
  • Experimental data were analyzed using four kinetic models: pseudo-first-order, pseudo-secondorder, intra-particle diffusion and Elovich models and it was found that the pseudo-second-order model fitted the adsorption data most with the highest correlation (R2 = 0.9875). (azjournalbar.com)
Data3
  • Asorption, Separation, and Thermodynamic Data on Herbicide Picloram Anshored on Silica Gel and its Cation Interaction Behavior. (ijser.org)
  • However, the extent to which thermodynamic data and laboratory results apply to the actual distribution of V in groundwater is not well understood. (usgs.gov)
  • High V concentrations in groundwater samples analyzed in this study were almost always associated with oxic and alkaline groundwater conditions, which is consistent with predictions based on thermodynamic data. (usgs.gov)
Interactions1
  • Through accurate ab initio calculations, included van der Waals interactions, we were able to map the thermodynamic profile and demonstrate a very small free energy transition barrier between the phases. (nist.gov)
Study3
  • Simultaneous measurement of adsorption and heat of adsorption should provide a more reliable description of the material under study. (cdc.gov)
  • Tewari, N., Guha, B.K. and Asudevan, P.V. (2005) Adsorption Study of Hexavalent Chromium by Bentonite Clay. (scirp.org)
  • The objectives of this DFT study are to consider the adsorption properties of the 4-[2-[4-(dimethylamino) phenyl] diazenyl]-benzoic acid (p-methyl red) dye molecule on the pristine B3O3 semiconducting layer for potential application in dye-sensitized solar cells. (researchgate.net)
Capacity4
  • The spray dryer provides a dry product with higher adsorption capacity than that of the other methods. (scielo.br)
  • The vibro-fluidized bed drying showed higher adsorption capacity than that of vacuum and freeze drying. (scielo.br)
  • The vacuum and freeze drying presented the same adsorption capacity. (scielo.br)
  • By introducing magnetic laponite RD the adsorption capacity of nanocomposites for Cu$^{2+}$ was significantly improved. (tubitak.gov.tr)
Feasible1
Prediction1
  • The artificial neural networks (ANN) are carried out for prediction of adsorption efficiency for the removal of Sr(II) ions from aqueous solution by eggshell (ES) and bone ash-hydroxyapatite (BA-HAp). (scialert.net)
Efficiency1
Experiments1
  • Adsorption experiments were carried out in a batch mode with varying pHs, MgO concentrations, initial dye concentrations, contact times, and temperatures. (ac.ir)
Hazardous1
  • The adsorption of hazardous lead from an aqueous medium using a Modified Doum Palm (MDP) shell was investigated. (azjournalbar.com)
Properties2
  • The adsorption and storage properties of the chalcogenide H 2 S gas by pentagonal B 2 C nanosheet (penta‐B 2 C) have been explored utilizing periodic density functional theory. (researchgate.net)
  • Many mechanisms of protein function contribute to amyloidogenesis, including "nonphysiologic proteolysis, defective or absent physiologic proteolysis, mutations involving changes in thermodynamic or kinetic properties, and pathways that are yet to be defined. (medscape.com)
Temperatures1