Optimum isotherm equation and thermodynamic interpretation for aqueous 1,1,2-trichloroethene adsorption isotherms on three adsorbents

Adsorption ◽  
1995 ◽  
Vol 1 (2) ◽  
pp. 113-132 ◽  
Author(s):  
Garth R. Parker
Keyword(s):  
Adsorption Isotherms ◽  
Isotherm Equation ◽  
Thermodynamic Interpretation

scholarly journals Determination Of Adsorption Performance Of Hydrothermally Synthesized Nanocomposite

2019 ◽  
Vol 2 (3) ◽  
pp. 1218-1223
Author(s):  
Hasan Sayğılı
Keyword(s):  
Adsorption Isotherms ◽  
Adsorption Mechanism ◽  
Organic Dyes ◽  
Hydrothermal Process ◽  
Freundlich Isotherm ◽  
One Pot ◽  
Isotherm Equation ◽  
Adsorption Capacities ◽  
Langmuir Isotherm Equation

In this study, a novel nanocomposite was synthesized by a simple one-pot hydrothermal process and used as an adsorbent for the removal of methylene blue (MB) and methyl orange (MO) dyes from the aqueous medium. Overall findings from batch experiments demonstrated that the prepared nanocomposite material (Fe/GBHC) had good adsorption capacity for MB and MO. The maximum adsorption capacities of the Fe/GBHC were observed to be 11 mg/g for MB and 8.9 mg/g for MO at neutral pH of the solutions and at 303 K. To obtain the adsorption mechanism of the Fe/GBHC, the experiments of adsorption isotherms were researched. The adsorption isotherms of both dyes could be described by the Langmuir isotherm equation rather than the Freundlich isotherm equation, with a high correlation coefficient values. The results showed that the prepared Fe/GBHC material by the hydrothermal method could have potential application in the removal of organic dyes from waste water.

Preparation of Novel Nanocarbon Spheres and Study on Adsorption Isotherms

2020 ◽  
Author(s):  
Aili Ma ◽  
Chengqian Li ◽  
Wuqing Du ◽  
Jie Chang
Keyword(s):  
Adsorption Isotherms

Analysis of some adsorption isotherms on calcium silicate hydrates

1977 ◽  
Vol 27 (1) ◽  
pp. 48-54
Author(s):  
Gerald C. Bye ◽  
Gilbert O. Chigbo
Keyword(s):  
Adsorption Isotherms ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrates

Adsorption of metal cations on wool carbonising waste. Part 1. Adsorption isotherms

1981 ◽  
Vol 31 (1) ◽  
pp. 597-601 ◽  
Author(s):  
Karim Farag ◽  
Francis Perineau ◽  
Antoine Gaset ◽  
Jacques Molinier
Keyword(s):  
Adsorption Isotherms ◽  
Metal Cations

Adsorption isotherms of insulin onto various materials

Diabetes ◽  
1984 ◽  
Vol 33 (7) ◽  
pp. 674-680 ◽  
Author(s):  
M. V. Sefton ◽  
G. M. Antonacci
Keyword(s):  
Adsorption Isotherms

General Cluster Sorption Isotherm

2020 ◽  
Author(s):  
Christoph Buttersack
Keyword(s):  
Density Functional ◽  
Capillary Condensation ◽  
Cluster Formation ◽  
Full Range ◽  
Full Description ◽  
Cross Sectional ◽  
Macroporous Silica ◽  
Isotherm Equation ◽  
Type Iv ◽  
Classical Thermodynamics

<p>Adsorption isotherms are an essential tool in chemical physics of surfaces. However, several approaches based on a different theoretical basis exist and for isotherms including capillary condensation existing approaches can fail. Here, a general isotherm equation is derived and applied to literature data both concerning type IV isotherms of argon and nitrogen in ordered mesoporous silica, and type II isotherms of disordered macroporous silica. The new isotherm covers the full range of partial pressure (10<sup>-6</sup> - 0.7). It relies firstly on the classical thermodynamics of cluster formation, secondly on a relationship defining the free energy during the increase of the cluster size. That equation replaces the Lennard-Jones potentials used in the classical density functional theory. The determination of surface areas is not possible by this isotherm because the cross-sectional area of a cluster is unknown. Based on the full description of type IV isotherms, most known isotherms are accessible by respective simplifications. </p>

Kinetic and thermodynamic study of the adsorption of calcium onto sugar beet pulp

2016 ◽  
pp. 565-570
Author(s):  
Huang Qin ◽  
Zhu Si-ming ◽  
Zeng Di ◽  
Yu Shu-juan
Keyword(s):  
Sugar Beet ◽  
Adsorption Equilibrium ◽  
Ph Value ◽  
Hard Water ◽  
Sugar Beet Pulp ◽  
Order Kinetic ◽  
Factors Affecting ◽  
Isotherm Equation ◽  
Equilibrium Data ◽  
Beet Pulp

Sugar beet pulp (SBP) was used as low value adsorbent for the removal of calcium from hard water. Batch experiments were conducted to determine the factors affecting adsorption of the process such as pH value and Ca concentration. The adsorption equilibrium of Ca2+ by the SBP is reached after 100min and a pseudo second-order kinetic model can describe the adsorption process. The initial concentrations of Ca varied from 927 to 1127mgCa2+/L. A dose of 30g/L sugar beet pulp was sufficient for the optimum removal of calcium. The overall uptake of Ca ions by sugar beet pulp has its maximum at pH=8. The adsorption equilibrium data fitted well with the Langmuir adsorption isotherm equation.

Predicting Boron Adsorption Isotherms by Midwestern Soils using the Constant Capacitance Model

2004 ◽  
Vol 68 (3) ◽  
pp. 795 ◽  
Author(s):  
Sabine Goldberg ◽  
Donald L. Suarez ◽  
Nicholas T. Basta ◽  
Scott M. Lesch
Keyword(s):  
Adsorption Isotherms ◽  
Capacitance Model ◽  
Boron Adsorption

Adsorption of organics on thermally treated solids obtained from colloidal silica

1987 ◽  
Vol 52 (3) ◽  
pp. 572-581 ◽  
Author(s):  
Miroslav M. Kopečni ◽  
Slobodan K. Milonjic ◽  
Wladyslaw Rudzinski ◽  
Jacek Jagiello
Keyword(s):  
Gas Chromatography ◽  
Thermodynamic Parameters ◽  
Adsorption Isotherms ◽  
Colloidal Silica ◽  
Adsorption Properties ◽  
Thermal Pretreatment ◽  
Lateral Interactions ◽  
Adsorbed Molecules ◽  
Temperature Range ◽  
Thermally Treated

Adsorption isotherms of three adsorbates on the solid beads obtained from colloidal silica were determined by means of gas chromatography at low surface coverages, when lateral interactions between the adsorbed molecules are negligible. The influence of thermal pretreatment on the adsorption properties of the solids was investigated in the temperature range from 343 to 423 K, while the solids were heated between 523 K and 1 223 K. The thermodynamic parameters of adsorption have been determined and used to discuss the adsorbate-adsorbent interactions.

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