Determination of adsorption isotherms by means of HPLC: Adsorption mechanism elucidation and separation optimization

2009 ◽  
pp. NA-NA ◽  
Author(s):  
Nicola Marchetti ◽  
Alberto Cavazzini ◽  
Luisa Pasti ◽  
Francesco Dondi
Keyword(s):  
Adsorption Isotherms ◽  
Adsorption Mechanism

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.

Determination of the degree of adsorption and the heat of adsorption for 1-butylamine and ammonia on NaHY zeolites

1984 ◽  
Vol 49 (12) ◽  
pp. 2739-2743 ◽  
Author(s):  
Miloslav Křivánek ◽  
Pavel Jírů
Keyword(s):  
Lewis Acid ◽  
Adsorption Isotherms ◽  
Heat Of Adsorption ◽  
Brønsted And Lewis Acid

The degree and heat of adsorption of 1-butylamine and ammonia were measured on samples of NaHY zeolites activated at 400-600°C. The adsorption isotherms and calorimetric curves were compared for the two bases, and the amount of Bronsted and Lewis acid centres was determined from the calorimetric curves.

LINURON ADSORPTION AND THE DEGREE OF DECOMPOSITION OF PEATS AS MEASURED BY RUBBED FIBRE CONTENT AND PYROPHOSPHATE INDEX

1976 ◽  
Vol 56 (2) ◽  
pp. 105-109 ◽  
Author(s):  
H. MORITA
Keyword(s):  
Adsorption Isotherms ◽  
Fibre Content ◽  
Extraction Technique ◽  
Adsorption Coefficient ◽  
Column Extraction

Determination of the Freundlich adsorption isotherms for linuron with some peats showed that the adsorption coefficient, K, is closely related to the degree of decomposition as measured by the rubbed fibre content and the pyrophosphate index. The K values indicate that adsorption increases with decomposition. The analyses required for the determination of K were facilitated by the use of a column extraction technique.

Kinetic Study of Methyl Orange Adsorption from Solution by IOCZ

2013 ◽  
Vol 684 ◽  
pp. 194-197
Author(s):  
Yi Ke Li ◽  
Bing Lu Zhao ◽  
Wei Xiao ◽  
Run Ping Han ◽  
Yan Qiang Li
Keyword(s):  
Methyl Orange ◽  
Contact Time ◽  
Adsorption Mechanism ◽  
Order Model ◽  
Initial Concentration ◽  
Pseudo Second Order ◽  
Adsorption From Solution ◽  
Adsorption Quantity ◽  
Regressive Analysis

The effect of contact time and the determination of the kinetic parameters of adsorption of methyl orange (MO) from aqueous solution onto Iron-Oxide-Coated-Zeolite (IOCZ) powder are important in understanding the adsorption mechanism. The effect of contact time on adsorption quantity was studied at different initial concentration and temperature, respectively. The pseudo-second-order model was adopted to fit the experimental data using non-linear regressive analysis and it was used to predict the adsorption behavior. The results showed that the process of adsorption MO was endothermic and chemisorption. The pore diffusion was not significant.

Determination of adsorption isotherms and solute activities from spreading pressure-surface charge data

1977 ◽  
Vol 62 (3) ◽  
pp. 454-460 ◽  
Author(s):  
Sherril D Christian ◽  
Glenn Dryhurst ◽  
Viktor Brabec ◽  
James G Baker
Keyword(s):  
Surface Charge ◽  
Adsorption Isotherms ◽  
Spreading Pressure ◽  
Pressure Surface

scholarly journals DFT Study on Adsorption of Acetone and Toluene on Silicene

2020 ◽  
Vol 36 (1) ◽  
Author(s):  
Pham Trong Lam ◽  
Ta Thi Luong ◽  
Vo Van On ◽  
An Dinh Van
Keyword(s):  
Charge Transfer ◽  
Potential Energy ◽  
Potential Energy Surfaces ◽  
Adsorption Mechanism ◽  
Simulation Method ◽  
Dft Study ◽  
Gap Opening ◽  
Energy Surfaces ◽  
And Diffusion

In this work, we investigated the adsorption mechanism of acetone and toluene on the surface of silicene by the quantum simulation method. The images of the potential energy surfaces for different positions of the adsorbate on the silicene surface were explored by Computational DFT-based Nanoscope tool for determination of the most stable configurations and diffusion possibilities. The charge transfer in order of 0.2 – 0.3 electrons and the tunneling gap opening of 18 – 23 meV due to acetone and toluene, respectively, suggest that silicene is considerably sensitive with these VOCs and can be used as the material in the fabrication of reusable VOC sensors.

Sign in / Sign up

Export Citation Format

Share Document