Measurement and modelling of adsorption equilibrium, adsorption kinetics and breakthrough curve of toluene at very low concentrations on to activated carbon

2011 ◽  
Vol 32 (7) ◽  
pp. 757-766 ◽  
Author(s):  
Anne Réguer ◽  
Sabine Sochard ◽  
Cécile Hort ◽  
Vincent Platel
Keyword(s):  
Activated Carbon ◽  
Adsorption Kinetics ◽  
Breakthrough Curve ◽  
Adsorption Equilibrium ◽  
Equilibrium Adsorption ◽  
Low Concentrations

scholarly journals Application of Graphene Oxide for Adsorption Removal of Geosmin and 2-Methylisoborneol in the Presence of Natural Organic Matter

2019 ◽  
Vol 16 (11) ◽  
pp. 1907
Author(s):  
Akira Hafuka ◽  
Takahiro Nagasato ◽  
Hiroshi Yamamura
Keyword(s):  
Organic Matter ◽  
Graphene Oxide ◽  
Activated Carbon ◽  
Natural Organic Matter ◽  
Adsorption Kinetics ◽  
Layered Structure ◽  
Adsorption Equilibrium ◽  
Adsorption Sites ◽  
Adsorption Removal ◽  
The Difference

We investigated the adsorption characteristics of geosmin and 2-methylisoborneol (MIB) on graphene oxide (GO) in the absence and presence of natural organic matter (NOM). The graphene oxide had fast adsorption kinetics for both compounds because of its open-layered structure, with adsorption equilibrium being achieved within 15 min of contact. Although NOM did not affect the adsorption of geosmin on GO, it delayed that of MIB, probably because of competition for adsorption sites. The adsorption isotherms show that GO had a greater capacity for geosmin adsorption than for MIB because geosmin was more hydrophobic. Moreover, NOM interfered with the adsorption of MIB onto the GO, but increased the amount of adsorbed geosmin, which likely occurred because NOM increased the dispersibility of GO, which then increased the number of GO adsorption sites. The difference in the effects of NOM on GO adsorption of geosmin and MIB may be explained by their hydrophobicity. Although the adsorption of geosmin and MIB by GO was fast, its capacity to adsorb both compounds was substantially lower than that of activated carbon because of its higher hydrophilicity.

The Adsorption Characteristics of Phytochemical on Supporters

2013 ◽  
Vol 781-784 ◽  
pp. 919-922
Author(s):  
Thararat Mankit ◽  
Anurak Petiraksakul ◽  
Pijit Jiemvarangkul
Keyword(s):  
Activated Carbon ◽  
Adsorption Isotherm ◽  
Adsorption Mechanism ◽  
Adsorption Equilibrium ◽  
Liquid Product ◽  
Equilibrium Adsorption ◽  
Equilibrium Time ◽  
Company Limited ◽  
Langmuir Constants ◽  
Langmuir And Freundlich Models

The objective of this research is to study equilibrium adsorption, adsorption isotherm and the amount of the phytochemical called Micronice Bio MEX 3, which is adsorbed on various supporters. Micronice is a biodegradable chemical liquid product collected from Technogreen Company Limited. The supporters in this work are activated carbon, zeolite and brick which are used as adsorbents. The supporters were immersed in the Micronice with various periods to find out their adsorption equilibrium time. The results show that the adsorption equilibrium time for all supporters is 60 minutes and the mass adsorption percentages of activated carbon, zeolite and brick are 14.05%, 1.58% and 2.24%, respectively. An adsorption isotherm can be described by the Langmuir and Freundlich models. The Freundlich constants of activated carbon, zeolite and brick are KF= 4.76 x10-8(mg/g)(L/mg)1/n, 7.15x10-8(mg/g)(L/mg)1/nand 1.10x10-4(mg/g)(L/mg)1/n, n = 0.772, 0.619 and 0.922, respectively. The Langmuir constants of activated carbon, zeolite and brick are KL= 756.62 L/mg, 12,924 L/mg and 3,918.60 L/mg, qo= 1,428.57 mg/g, 44.25 mg/g and 303.030 mg/g. The results present that the adsorption mechanism of all supporters can be well described by both Langmuir and Freundilch models and the best supporter is activated carbon.

The elimination of siloxanes from the biogas of a wastewater treatment plant by means of an adsorption process

2016 ◽  
Vol 74 (12) ◽  
pp. 2927-2934 ◽  
Author(s):  
Arturo Trapote ◽  
Mariano García ◽  
Daniel Prats
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Breakthrough Curve ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Eddy Diffusion ◽  
Transfer Constant ◽  
Heat Engines

Siloxanes present in the biogas produced during anaerobic digestion in wastewater treatment plants (WWTPs) can damage the mechanism of cogeneration heat engines and obstruct the process of energy valorization. The objective of this research is to detect the presence of siloxanes in the biogas and evaluate a procedure for their elimination. A breakthrough curve of a synthetic decamethylcyclopentasiloxane on an experimental bed of activated carbon was modeled and the theoretical mathematical model of the adsorption process was adjusted. As a result, the constants of the model were obtained: the mass transfer constant, Henry's equilibrium constant, and the Eddy diffusion. The procedure developed allows the adsorption equilibrium of siloxanes on activated carbon to be predicted, and makes it possible to lay the basis for the design of an appropriate activated carbon module for the elimination of siloxanes in a WWTP.

Adsorption Equilibrium and Kinetics of CO2 and H2O on Activated Carbon

2012 ◽  
Vol 27 (2) ◽  
pp. 139-145 ◽  
Author(s):  
Dong XU ◽  
Jun ZHANG ◽  
Gang LI ◽  
Penny XIAO ◽  
Paul WEBLEY ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Equilibrium ◽  
Equilibrium And Kinetics ◽  
Adsorption Equilibrium And Kinetics ◽  
Kinetics Of

A multi-component model for granular activated carbon filters combining biofilm and adsorption kinetics

2021 ◽  
Vol 197 ◽  
pp. 117079
Author(s):  
Vanessa Acevedo Alonso ◽  
Tobias Kaiser ◽  
Roman Babist ◽  
Thomas Fundneider ◽  
Susanne Lackner
Keyword(s):  
Activated Carbon ◽  
Adsorption Kinetics ◽  
Granular Activated Carbon ◽  
Component Model

Supercritical CO2 regeneration of activated carbon loaded with organic adsorbates

1997 ◽  
Vol 35 (7) ◽  
pp. 261-268 ◽  
Author(s):  
Kazuyuki Chihara ◽  
Kanji Oomori ◽  
Takao Oono ◽  
Yosuke Mochizuki
Keyword(s):  
Activated Carbon ◽  
Cost Estimation ◽  
Supercritical Co2 ◽  
Adsorption Equilibrium ◽  
Equilibrium Constants ◽  
Adsorption Dynamics ◽  
Boiling Points ◽  
Organic Adsorbates ◽  
Carbon Regeneration ◽  
Co2 Density

Supercritical CO2 regeneration is one of the possibilities for spent carbon regeneration loaded with some organics. Here, adsorption equilibrium and adsorption dynamics were evaluated for some typical organic pollutants under some supercritical CO2 conditions. A supercritical CO2 chromatograph packed with activated carbon (F-400, CAL) was used to detect the pulse responses of organics, which were analyzed by moment analysis. Adsorption equilibrium constants of some organics varied with CO2 density and their boiling points. Possibility of regeneration of each substance was discussed. Cost estimation was necessary and was the key point of this technique.

Sign in / Sign up

Export Citation Format

Share Document