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701
Studies on the Use of Oyster, Snail and Periwinkle Shells as Adsorbents for the Removalof Pb2+ Aqueous Solution
Published 2009-01-01“…The effects of contact time and concentration on adsorption, thermodynamics of sorption and distribution coefficients of the adsorbents were examined to optimize the conditions to be utilized for decontamination of effluents containing Pb2+. …”
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702
Kinetics and equilibrium studies of phosphate removal from aqueous solution by calcium silicate hydrate synthesized from electrolytic manganese residue
Published 2019-10-01“…Meanwhile, the kinetic data confirmed that the sorption of phosphorus onto electrolytic manganese residue–calcium silicate hydrate can be best described by the pseudo-second-order kinetic model, suggesting that the adsorption process might be chemical sorption. Furthermore, thermodynamic studies illustrated that the adsorption process was endothermic and spontaneous in nature.…”
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703
Prediction of Tetraoxygen Reaction Mechanism with Sulfur Atom on the Singlet Potential Energy Surface
Published 2014-01-01“…For the title reaction, we obtained four kinds of products at the B3LYP level, which have enough thermodynamic stability. The results reveal that the product P3 is spontaneous and exothermic with −188.042 and −179.147 kcal/mol in Gibbs free energy and enthalpy of reaction, respectively. …”
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704
Removal of 2-naphthalenesulfonic acid using novel dual functional weakly basic anion exchange resins from aqueous solution
Published 2019-05-01“…The experimental data revealed that the adsorption process on the four resins fitted well with the pseudo-second-order kinetics equation and the equilibrium isotherms were in good agreement with the Langmuir model. Thermodynamic analyses illustrated that 2-naphthalenesulfonic acid adsorption onto resins was an endothermic and spontaneous process. …”
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705
Thermo-Hydromechanical Coupling Responses Driven by a Central Heat Source in Unsaturated Soils
Published 2022-01-01“…Based on the thermodynamic and thermoelastic theory, the coupled governing equations of deformation, heat transfer, and moisture migration in unsaturated soils were given. …”
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706
Dynamic Electromechanical Response of a Viscoelastic Dielectric Elastomer under Cycle Electric Loads
Published 2018-01-01“…In the current study, a thermodynamic model is set up to characterize the influence of viscoelasticity on the electromechanical and dynamic response of a viscoelastic DE. …”
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707
Ultrasonic Investigations of Molecular Interaction in Binary Mixtures of Benzyl Benzoate with Acetonitrile and Benzonitrile
Published 2011-01-01“…From the experimental data, thermodynamic parameters like adiabatic compressibility, internal pressure, enthalpy, activation energy etc., were computed and the molecular interactions were predicted based on the variation of excess parameters in the mixture. …”
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708
Heating and Cooling Studies of Relativistic Accretion Disks Around the Non-Rotating Black with A Simple Model
Published 2021-03-01“…We use the simple model of heat flux, in which the heat flux is proportional to temperature. Then the thermodynamic quantities are derived. We use the radial form for the radial component of four velocity in the locally non rotating frame and Keplerian angular momentum. …”
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709
Energy Analysis in Combined Reforming of Propane
Published 2013-01-01“…An energy requirement analysis of steam reforming to dry reforming with intermediate steps of steam reduction and equivalent CO2 addition to the feed fuel for syngas generation has been done to identify condition for optimum process operation. Thermodynamic equilibrium data for combined reforming was generated for temperature range of 400–1000°C at 1 bar pressure and combined oxidant (CO2 + H2O) stream to propane (fuel) ratio of 3, 6, and 9 by employing the Gibbs free energy minimization algorithm of HSC Chemistry software 5.1. …”
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710
Adsorption Properties of O2 onCr5 Nanostructures: A DFT Study
Published 2011-01-01“…Geometry optimizations and vibrational frequencies of them were carried out at B3LYP level of theory with LANL2DZ and 6-31G* basis sets using Gaussian 98 suites of program. Their thermodynamic properties were estimated. We have also investigated the total electronic properties, HOMO, LUMO and energy gap for Cr5 nanostructures with O2. …”
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711
Sorption Behavior of Cu(II) From Acidic SolutionUsing Weathered Basalt Andesite Products
Published 2007-01-01“…The sorptionpattern of Cu ions onto WBAP followed Langmuir, Freundlich, and Dubinin-Kaganer-Radushkevich isotherms. The thermodynamic parameters (∆H0, ∆S0,and ∆G0) for Cu sorption onto WBAP were also determined.…”
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712
A High Order Theory for Linear Thermoelastic Shells: Comparison with Classical Theories
Published 2013-01-01“…The first physical quantities that describe thermodynamic state have been expanded into Fourier series in terms of Legendre polynomials with respect to a thickness coordinate. …”
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713
Study of the Structure of a Surface-porous Adsorbent using the Gas Chromatographic Version of the Molecular Probe method
Published 1993-03-01“…This is based on a comparison of the thermodynamic properties for the adsorption of substances of known molecular size on the surface-porous adsorbent with those characteristic for the adsorption of the same substances on to a non-porous adsorbent of a similar chemical nature.…”
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714
Experimental investigation on the formation mechanism of the TiFe alloy by the molten-salt electrolytic titanium concentrate
Published 2011-01-01“…Different product and structure can be obtained by changing temperature. According to thermodynamic calculation, the principal electroreduction products are Ti and TiFe2 and then Ti and TiFe2 are formed by interdiffusion which is governed by temperature.…”
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715
Adsorption of Alizarin Red S onto Nano-Sized Silica Modified with γ-Aminopropyltriethoxysilane
Published 2011-03-01“…It was shown that the sorption processes were better fitted by the pseudo-second-order equation. From thermodynamic studies, the values of the Gibbs' free energy (ΔG 0 ), standard enthalpy change (ΔH 0 ) and standard entropy change (ΔS 0 ) were calculated as −3.78 kJ/mol, −90.05 kJ/mol and −289.34 J/(mol K), respectively, thereby indicating that the adsorption process was spontaneous and exothermic.…”
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716
Surface Potential of Polycrystalline Hematite in Aqueous Medium
Published 2011-01-01“…The theoretical interpretation of the equilibrium data was performed by applying the surface complexation model and the thermodynamic equilibrium constants for the first and the second step of surface protonation was obtained as logK1∘=11.3;logK2∘=2.8.…”
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717
One-Dimensional Nonequilibrium Radiation-Transport Equation under Diffusion Approximation and Its Discrete Scheme
Published 2014-01-01“…Based on the nonlocal thermodynamic equilibrium state and large optical thickness of plasma, we establish one-dimensional nonequilibrium radiation-transport equation from diffusion approximation. …”
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718
Investigation of Citrus aurantiifolia Leaves Extract as Corrosion Inhibitor for Mild Steel in 1 M HCL
Published 2009-01-01“…Theoretical fitting of different isotherms, Langmuir, Temkin, Freundlich, Frumkin, Flory-Huggins and the kinetic thermodynamic model, were tested to clarify the nature of adsorption. …”
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719
Preparation and Analytical Properties of Amphoteric Chelating Resin
Published 2008-01-01“…The identification of resin structure was performed by elemental and FTIR analysis. The thermodynamic parameters such as activation energy (Ea), entropy (S*), enthalpy (H*) and free energy (G*) for thermal decomposition were calculated from thermal data. …”
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720
Geometric Curvatures of Plane Symmetry Black Hole
Published 2013-01-01“…We study the properties and thermodynamic stability of the plane symmetry black hole from the viewpoint of geometry. …”
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