Thermodynamic Parameter Research Papers - Academia.edu (original) (raw)

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- Sea surface temperature, Atmospheric sciences, Numerical Simulation, Weather Forecasting
- by Ramazan Donat
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- Thermodynamics, Analytical Chemistry, Inorganic Chemistry, Gibbs Free Energy
- by Luiz Pinto and +1
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- Thermodynamics, Nanoparticles, Multidisciplinary, Adsorption

The bagasse fly ash, an industrial solid waste of sugar industry, was used for the removal of cadmium and nickel from wastewater. As much as 90% removal of cadmium and nickel is possible in about 60 and 80 min, respectively, under the... more

- by Imran Ali
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- Chemistry, Water, Medicine, Multidisciplinary
- by KULAMANI PARIDA
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- Engineering, Water Purification, Entropy, Colloid and Interface Chemistry
- by Soumen Ghosh
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- Engineering, Adsorption, Micelles, Fatty acids
- by Hanaa El-Desoky
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- Cyclic Voltammetry, Transition-Metal Oxides, Metal Complexes, CHEMICAL SCIENCES
- by Deodato Radic
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- Materials Engineering, Thermodynamic Parameter

Dielectric relaxation studies of propan-1-ol with alkyl benzoates (methyl benzoate and ethyl benzoate) have been carried out, for various mole fractions, at different temperatures using a LF impedance analyzer, Plunger method, and an Abbe’s refractometer in the radio, microwave and optical frequency regions, respectively. Kirkwood’s effective correlation factor, the corrective Kirkwood correlation factor, Bruggeman parameter, relaxation time, excess inverse relaxation

- by Madhu Mohan
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- Thermodynamics, Solution Chemistry, Dielectric Relaxation, Hydrogen Bond
- by Devrim Balkose
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- Engineering, Thermodynamics, Kinetics, Water Purification
- by Richard Owusu-Apenten
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- Thermodynamics, Analytical Chemistry, Protein Stability, Gibbs Free Energy
- by Priya Sharma
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- Network Security, Scientific, Aqueous Solution, Thermodynamic Parameter
- by Hari Panicker
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- Analytical Chemistry, Quantum Chemistry, Raman Spectroscopy, Molecular

In this work, the adsorption of chromium(VI) was studied on activated carbon prepared from Tamarind wood with zinc chloride activation. Adsorption studies were conducted in the range of 10–50mg/l initial chromium(VI) concentration and at temperature in the range of 10–50°C. The experimental data were analyzed by the Freundlich isotherm and the Langmuir isotherm. Equilibrium data fitted well with the Langmuir

- by Jyotikusum Acharya
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- Chemical Engineering, Mass Transfer, Kinetics, Wastewater Treatment
- by Douglas Turner
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- Biochemistry, Thermodynamics, RNA, Linear models
- by Emilia Bramanti
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- Engineering, Biomass, Environmental Monitoring, Fungi

Using an original microcalorimetric method, the existence of the Mg2ATP ternary chelate has been studied. The thermodynamic parameters of this complex are ΔH=7.2±0.5 kJ mole−1 andK=49±9 M−1. These values are compared with those previously... more

- by Jean Sari
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- Thermodynamics, Bioenergetics, Magnesium, Calorimetry
- by Javier Gomez
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- Thermodynamics, Molecular Biology, Kinetics, Molecular Recognition
- by Saviour Umoren and +1
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- Engineering, Kinetics, Desalination, Weight Loss
- by Sudipta Chatterjee
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- Engineering, Thermodynamics, Kinetics, Water Purification
- by nurul widiastuti
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- Engineering, Thermodynamics, Kinetics, Adsorption
- by Pathik Shah
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- Morphology, Synthesis, Heavy Metal, Activation Energy
- by Engineer Shamim Khan
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- Water, Kinetics, Multidisciplinary, Copper
- by Thi Vo Hong
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- Chemical Engineering, Thermodynamics, Analytical Chemistry, Kinetics
- by Paul P Conway
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- Materials Engineering, Thermodynamics, Kinetics, Scientific Computing
- by Jane Coimbra
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- Chemical Engineering, Kinetics, Gibbs Free Energy, Second Order

Fluorescence spectroscopy and circular dichroism (CD) spectroscopy were used to investigate the interaction of coumarin-3-carboxylic acid with human serum albumin (HSA) and bovine serum albumin (BSA) under physiological conditions in a buffer solution of pH 7.4. Quenching constants were determined using the Lineweaver-Burk equation to provide a measure of the binding affinity of coumarin-3-carboxylic acid to HSA/BSA. Binding studies concerning

- by Shinsuke Shigeto
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- Technology, Gibbs Free Energy, Physical sciences, CHEMICAL SCIENCES
- by wael Khalil
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- Inorganic Chemistry, Transition metal chemistry, Metal ion, Ionic Strength
- by Karine Ballerat
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- Geology, Geochemistry, Arsenic, Gibbs Free Energy
- by Sonu Sankhla
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- Activation Energy, Free Energy, Hydrogen Bond, Temperature Dependence
- by Mohammad Irani
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- Chemical Engineering, Thermodynamics, Adsorption, Lead

Tribenzyl tin(IV) chloride complexes of morpholine N-thiohydrazide (L1), aniline-N-thiohydrazide (L2),N-(morpholine-N-thio)-1,3-propanediamine (L3) and (aniline-N-thio)-1,3-propanediamine (L4) of the type (C6H5CH2)3Sn(L)Cl (where L=L1, L2, L3 and L4) have been synthesised in dioxane and in H2O and acetone mixture. These were characterized by C,H,N-analysis, UV, IR and 1HNMR spectral studies. In both the complexes ligands act as bidentate, coordinating through sulphur and terminal nitrogen. The complexes are 1:1 metal ligand complexes. Various thermodynamic parameters have been calculated for the decomposition steps using TG/DTA curves in air as well as nitrogen atmosphere.

- by namita gandhi
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- Pyrolysis, Nitrogen, Thermogravimetry, Thermal Analysis
- by Şenol Sert
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- Chemical Engineering, Experimental Design, Sol Gel Process, Surface Area
- by Nito A Debacher
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- Engineering, Kinetics, Wastewater Treatment, Adsorption
- by Vaibhav Goud
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- Thermodynamics, Chemistry, Catalysis, Kinetics
- by Ankur Jain
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- Engineering, Thermodynamics, Hydrogen, Hydrogen Storage

Boltwoodite and uranophane are uranyl silicates common in oxidized zones of uranium ore deposits. An understanding of processes that impact uranium transport in the environment, especially pertaining to the distribution of uranium between solid phases and aqueous solutions, ultimately requires determination of thermodynamic parameters for such crystalline materials. We measured formation enthalpies of synthetic boltwoodites, K(UO2)(HSiO4)·H2O and Na(UO2)(HSiO4)·H2O, and uranophane,

- by Peter Burns
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- Geology, Geochemistry, Thermodynamics, Gibbs Free Energy
- by Tomasz Bajda
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- Geology, Geochemistry, Thermodynamics, Water Treatment
- by G. Perlovich and +1
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- Thermodynamics, Polymorphism, Vapor Pressure, Phase transition

The interfacial and thermodynamic properties of a non-ionic surfactant, poly[oxyethylene(10)] lauryl ether, [C12H25(OCH2CH2)10OH], in aqueous solution in the presence of amino acids have been investigated. Critical micelle concentrations (cmcs) were determined by surface tension measurements at different additive concentrations and temperatures using a du Nouy tensiometer. From the surface tension data, the surface excess concentration (τ), the minimum area per molecule (Amin), and the surface pressure at the cmc(πcmc) were evaluated. Thermodynamic parameters of adsorption and micellization were evaluated and discussed. The other solution properties of this surfactant like the cloud point viscosity, and foaming have been determined in the presence of different concentrations of alanine and glycine.

- by Bhaskar Sharma
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- Materials Engineering, Surface Tension, Point Cloud, Amino Acid Profile

A re-assessment of the thermodynamic parameters of the binary Cr–Ti system and a first assessment of the ternary Al–Cr–Ti system were performed. The new Cr–Ti description contains all three modifications of the Laves phases (α-TiCr2, β-TiCr2, γ-TiCr2) and the calculated binary phase diagram is in very good agreement with the experimental data. For a first assessment of the Al–Cr–Ti system,

- by Olga Fabrichnaya and +1
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- Materials Engineering, Thermodynamics, Intermetallics, Experimental Data

Ion-exchange is an alternative process for uptake of heavy metals from aqueous solutions. In the present study, the sorption of nickel(II) ions from aqueous solution was investigated by using Lewatit MonoPlus SP 112 (strongly acidic, macroporous cation-exchange resin) in a batch adsorption system as a function of pH (2.0-8.0), initial nickel concentration (50-200 mg/L), resin dosage (0.5-2.0 g/L), contact time (0.5-3h), and temperatures (298-318K). The data were analyzed on the basis of Lagergren pseudo-first order, pseudo-second order (Types 1-5), Elovich and external, Weber-Morris intraparticle, pore-surface mass diffusion models. The experimental data showed that the maximum pH for efficient sorption of nickel(II) was 6.0. At the optimal conditions, nickel(II) ions sorption on the resin was decreased when the initial metal concentration increased. The results indicated that the resin dosage strongly affected the amount of nickel(II) ions removed from aqueous solution. The adsorption process was very fast due to 80% of nickel(II) sorption was occurred within 30 min and equilibrium was reached at about 90 min. Freundlich and Langmuir adsorption isotherm models were used for sorption equilibrium data and the maximum adsorption capacity (171 mg/g) of Lewatit MonoPlus SP 112 was obtained from Langmuir isotherm. The thermodynamic parameters (DeltaG degrees, free energy change; DeltaS degrees, enthalpy change; and DeltaH degrees, entropy change) for sorption of nickel(II) ions were evaluated. The rise in temperature caused a partly increase in the value of the equilibrium constant (K(c)) for the sorption of nickel(II) ions. Moreover, column flow adsorption study was also studied. Breakthrough curves were obtained from column flow studies by using both synthetic solution and rinsing bath water of filter industry. The column regeneration was carried out for two sorption-desorption cycles. The eluant used for regeneration of the cation-exchange resin was 7% (w/w) HCl. The experimental results demonstrated that Lewatit MonoPlus SP 112 cation-exchange resin could be used effectively for the removal of nickel(II) ions from aqueous medium.

- by Bülent Keskinler
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- Engineering, Thermodynamics, Kinetics, Water Purification
- by Seyed Hashemi
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- Materials Engineering, Mechanical Engineering, Civil Engineering, Corrosion Science
- by Muhammad Iqbal
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- Engineering, Thermodynamics, Kinetics, Adsorption
- by Jitendra Mata
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- Analytical Chemistry, Models, Viscosity, Group Size