How to plot Freundlich adsorption isotherm in Excel?
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14 Citations | The simulation results indicate that the adsorption isotherm in adsorption processes is divided into four regions in a log-log plot, being in agreement with experimental observations. |
| Freundlich isotherm model best fitted the data with good correlation coefficient, suggesting heterogenous distribution of adsorption sites. | |
24 Citations | The Freundlich isotherm was found to well represent the measured adsorption data based on the higher coefficient of determination ( r 2 ). |
45 Citations | Prior to employing an adsorption isotherm, its coefficients should be adjusted using experimental data of a considered adsorption system. |
| The Freundlich adsorption isotherm model provides a better fit to the adsorption isotherm data. | |
29 Citations | The linear regression (R2) values for the Freundlich isotherm for all tested parameters are close to unity, suggesting the model to be well suited for gold glycinate adsorption onto activated carbon. |
111 Citations | The Langmuir-Freundlich isotherm model can better describe the adsorption isotherm data. |
72 Citations | Langmuir equation can be well used to describe the adsorption isotherm data. |
61 Citations | The equilibrium adsorption isotherm gives a satisfactory fit of the adsorption data. |
Open access•Journal Article 46 Citations | The results indicate that the adsorption isotherm can be satisfactorily described using the Freundlich and Langmuir models. |
Related Questions
What is Isotherm adsorption?4 answersIsotherm adsorption refers to the equilibrium relationship between the amount of adsorbate molecules accumulated on a solid surface and the concentration of the adsorbate in the liquid phase. It plays a crucial role in understanding the adsorption mechanism and catalytic processes. Various theoretical adsorption isotherms, such as Langmuir, Freundlich, Radlich-Peterson, Temkin, and Dubinin-Radushkevic, are commonly used to model experimental equilibrium data and optimize the adsorbent mass. These isotherms provide insights into adsorption affinity, mean free energy, and the nature of adsorption (physisorption or chemisorption). The process of adsorption kinetics, which describes the rate of adsorbate uptake and the interaction between the adsorbate and adsorbent, is also essential in determining the optimal adsorption capacity of the adsorbent.
How does isotherm modelling help in deciding best adsorbents for fluoride removal?5 answersIsotherm modeling is a useful tool for determining the best adsorbents for fluoride removal. It helps in understanding the adsorption capacity and efficiency of different adsorbents by fitting experimental data to isotherm models such as Langmuir and Freundlich. The Langmuir model describes the adsorption process on a monolayer surface, while the Freundlich model represents adsorption on a heterogeneous surface. The isotherm models provide information about the maximum adsorption capacity, equilibrium concentration, and the nature of the adsorption process. By comparing the correlation coefficients and chi-square test values of different models, the best-fitting model can be identified, which indicates the mechanism of fluoride adsorption. Additionally, isotherm modeling allows for the prediction of adsorption capacities at different concentrations and temperatures, aiding in the selection of the most effective adsorbent for fluoride removal.
What is adsorption isotherm?4 answersAn adsorption isotherm describes the equilibrium of adsorption of a substance on a surface at a constant temperature. It represents the amount of material bound to the surface as a function of the material present in the solution. Adsorption isotherms are mathematical equations that describe the relationship between the amount of adsorbate adsorbed on an adsorbent and the concentration of adsorbate in solution when equilibrium has been reached at constant temperature. These isotherms are used to model experimental equilibrium data and optimize the adsorbent mass. They provide essential information about adsorption affinity, mean free energy, and whether the adsorption is physisorption or chemisorption. Recent modeling of adsorption isotherms has focused on the use of statistical physics, considering steric, energetic, and thermodynamic parameters.
What is the characteristics of freundlich adsorption isothermal?5 answersThe Freundlich adsorption isotherm is a classic model used to analyze the equilibrium of solution-phase adsorption. It is derived from the Gibbs equation and provides theoretical definitions for model parameters. The inverse of the Freundlich power is linearly correlated with the molecular weight of an adsorbate for congeners with similar chemical structures, indicating a dependence of adsorption capacity on the molecular size of the adsorbate. The shape of the sorption isotherm adopted also influences the concentration profiles of the reactant in the catalyst pellet, causing damping of concentration oscillations. The adsorption of Cr(III) onto ettringite follows Langmuir's isothermal model, while the adsorption of Cr(VI) follows Freundlich's isothermal model. The thermodynamic approach to the Freundlich isotherm provides more general equations and does not contradict the molecular statistical theory. The Freundlich adsorption isotherm is used to describe adsorbate behavior on adsorbent surfaces and is influenced by various factors such as concentration, temperature, pH, and physical and chemical structures.
When does chemical adsorption occur?3 answersChemical adsorption occurs when molecules or atoms bind to a surface through chemical bonds. It involves the formation of new chemical species on the surface. Chemical adsorption is influenced by factors such as thermodynamics, energetics, and surface phenomena. It is an important process in various fields, including environmental technology and soil contamination. Understanding and handling chemical adsorption is crucial in these areas. Adsorption models and studies provide insights into diverse phenomena, such as oxygen binding to hemoglobin and vapor-liquid phase coexistence. The coexistence of different pollutants, such as cadmium and arsenate, can affect the adsorption behavior of heavy metals and anions in biochar-engineered environments. Overall, chemical adsorption plays a significant role in various natural and technological processes, and its study helps in developing effective separation methods and understanding environmental contamination.
How to plot adsorption isotherm in Excel?10 answers