Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Adsorption Isotherms I

Adsorption Isotherms I

Adsorption isotherms are mathematical models that describe how molecules in a gas or liquid phase interact with surfaces. Two of the most common isotherm models are the Langmuir and Freundlich isotherms, which relate to Type I monolayer chemisorption. The Langmuir model is based on four key assumptions:• Adsorption cannot exceed monolayer coverage.• All surface sites are equivalent.• Molecules adsorb only at vacant sites.• There are no interactions between adsorbed molecules.Consider the...

Adsorption Isotherms II

Adsorption Isotherms II

Brunauer, Emmett, and Teller (BET) introduced a theory in 1938 that modified Langmuir's assumptions to explain multilayer physical adsorption. This theory is applicable to Type II isotherms and provides a more realistic picture of adsorption processes. The BET theory assumes a uniform solid surface with localized adsorption sites, where adsorption at one site doesn't affect adsorption at neighboring sites. This theory also allows for the possibility of additional molecules being adsorbed on top...

Adsorption of Gases on Solids

Adsorption of Gases on Solids

Adsorption is a process where molecules, known as the adsorbates, accumulate on a surface, which is referred to as the adsorbent or substrate. Occurring at the solid-gas interface, this phenomenon is crucial in various scientific and industrial contexts. The reverse of adsorption is desorption.Two types of adsorptions exist: physical (physisorption) and chemical (chemisorption). Physisorption involves gas molecules held to the solid's surface by relatively weak intermolecular van der Waals...

Analyte Adsorption and Distribution

Analyte Adsorption and Distribution

In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and solvents...

Gas Chromatography: Types of Columns and Stationary Phases

Gas Chromatography: Types of Columns and Stationary Phases

Gas chromatography (GC) relies on stationary phases to separate and analyze components in a sample. There are two main types of stationary phases: liquid and solid. Liquid stationary phases are non-volatile, thermally stable, and chemically inert liquids coated onto the column. Solid stationary phases are particles of adsorbent material, such as silica gel or molecular sieves.
For an analyte to remain on the column for a sufficient amount of time, it must exhibit some level of compatibility (or...

High-Performance Liquid Chromatography: Elution Process

High-Performance Liquid Chromatography: Elution Process

In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Preparation of novel activated carbons from H2SO4-pretreated corncob hulls with KOH activation for quick adsorption of dye and 4-chlorophenol.

Journal of environmental management·2010

Same author

Kinetic studies on the adsorption of phenol, 4-chlorophenol, and 2,4-dichlorophenol from water using activated carbons.

Journal of environmental management·2010

Same author

Preparation of activated carbons from unburnt coal in bottom ash with KOH activation for liquid-phase adsorption.

Journal of environmental management·2010

Same author

A review and experimental verification of using chitosan and its derivatives as adsorbents for selected heavy metals.

Journal of environmental management·2009

Same author

Analyzing a liquid-solid phase countercurrent two- and three-stage adsorption process with the Freundlich equation.

Journal of hazardous materials·2008

Same author

Inferring the favorable adsorption level and the concurrent multi-stage process with the Freundlich constant.

Journal of hazardous materials·2008

Search research articles

Related Experiment Video

Updated: Jul 8, 2026

Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5

Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5

Published on: August 25, 2016

Liquid-solid phase countercurrent multi-stage adsorption process for using the Langmuir equation.

Feng-Chin Wu¹, Ru-Ling Tseng

¹Department of Chemical Engineering, National United University, Miao-Li 360, Taiwan.

Journal of Hazardous Materials

|January 9, 2008

Summary

This study optimized multi-stage adsorption using pistachio shell activated carbon, significantly reducing adsorbent usage by 66-87%. A two-stage system design offers practical engineering solutions for efficient adsorption processes.

More Related Videos

Monitoring Protein Adsorption with Solid-state Nanopores

Monitoring Protein Adsorption with Solid-state Nanopores

Published on: December 2, 2011

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Published on: February 21, 2017

Related Experiment Videos

Last Updated: Jul 8, 2026

Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5

Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5

Published on: August 25, 2016

Monitoring Protein Adsorption with Solid-state Nanopores

Monitoring Protein Adsorption with Solid-state Nanopores

Published on: December 2, 2011

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Published on: February 21, 2017

Area of Science:

Materials Science
Chemical Engineering
Environmental Science

Background:

Adsorption processes are crucial for separation and purification.
Optimizing adsorbent usage and stage design is key for economic viability.
Pistachio shell activated carbon presents a sustainable adsorbent material.

Purpose of the Study:

To determine the optimal number of stages for countercurrent adsorption.
To quantify adsorbent reduction in multi-stage systems.
To design a practical countercurrent two-stage adsorption system.

Main Methods:

Utilized mass balance and the Langmuir isotherm equation.
Synthesized activated carbon from pistachio shells via KOH activation and CO2 gasification.
Investigated adsorption isotherms for four different adsorbates.

Main Results:

Developed relationships between Langmuir parameters and adsorbent requirements for various stages.
Achieved significant adsorbent savings (66-87%) in a two-stage countercurrent system.
Demonstrated excellent adsorption performance of pistachio shell activated carbons.

Conclusions:

Pistachio shell activated carbons exhibit high adsorption capacity.
Countercurrent multi-stage adsorption significantly reduces adsorbent consumption.
A simple two-stage system is feasible for engineering applications.