Question
Asked 7th Feb, 2016

What is the difference between sorption and adsorption?

In some of articles, we used different terminologies which make us confuse.
Please help us with any comments, documents.
Thank you in advance.

Most recent answer

8th Nov, 2022
Fardad Koohyar
Sorption is used for both adsorption and absorption processes. In adsorption, atoms, ions, or molecules (named adsorbate) from gas and liquid phases attach to a surface, while in absorption, atoms, ions, or molecules enter into a bulk of liquid or solid materials.

Popular answers (1)

13th Feb, 2016
Nizar Matar
An-Najah National University
Sorption includes both adsorption (which means accumulation of a substance at the surface of a solid or a liquid) & absorption (which means assimilation of a substance within the bulk of a solid or liquid).
Adsorption is usually a physical operation. If the adsorbed material interacts with the surface, then chemisorption occurs "which is a chemical process of temporary nature". Chemisorption ends up by a physical operation called desorption.
Note: In industrial chemistry & chemical engineering, a process & an operation are NOT synonems. A process denotes a chemical change while an operation refers to a physical change.
21 Recommendations

All Answers (34)

7th Feb, 2016
Marcel M. Lambrechts
Centre d'Ecologie Fonctionnelle et Evolutive
Yes, I am confused about this!?
Cheers
3 Recommendations
7th Feb, 2016
Reza Tahery
Islamic Azad University
Sorption is a physical and chemical process by which one substance becomes attached to another. Specific cases of sorption are treated in the following articles:
Absorption – "the incorporation of a substance in one state into another of a different state"(e.g., liquids being absorbed by a solid or gases being absorbed by a liquid);
Adsorption – the physical adherence or bonding of ions and molecules onto the surface of another phase (e.g., reagents adsorbed to a solid catalyst surface);
Ion exchange – an exchange of ions between two electrolytes or between an electrolyte solution and a complex.
5 Recommendations
7th Feb, 2016
Nelson Elias
Vila Velha Hospital
Dear Hanin
Sorption is a concomitant phenomenon of adsorption and absorption.
Adsorption describes the phenomenon in which molecules that are present in a fluid (liquid or gas), concentrated spontaneously on a solid surface by a finite time.
14 Recommendations
7th Feb, 2016
Nelson Elias
Vila Velha Hospital
Dear Hanin
Sorption is a concomitant phenomenon of adsorption and absorption.
Adsorption describes the phenomenon in which molecules that are present in a fluid (liquid or gas), concentrated spontaneously on a solid surface by a finite time.
5 Recommendations
7th Feb, 2016
Nelson Elias
Vila Velha Hospital
Dear Hanin
Sorption is a concomitant phenomenon of adsorption and absorption.
Adsorption describes the phenomenon in which molecules that are present in a fluid (liquid or gas), concentrated spontaneously on a solid surface by a finite time.
4 Recommendations
7th Feb, 2016
Hanin Al-Shahrani
Imam Abdul Rahman bin Faisal University
Thank you
2 Recommendations
8th Feb, 2016
Fateh Mebarek-Oudina
Université 20 août 1955-Skikda
Absorption is the process in which a fluid is dissolved by a liquid or a solid (absorbent). Adsorption is the process in which atoms, ions or molecules from a substance (it could be gas, liquid or dissolved solid) adhere to a surface of the adsorbent. Adsorption is a surface-based process where a film of adsorbate is created on the surface while absorption involves the entire volume of the absorbing substance.
Comparison chart
Absorption versus Adsorption comparison chart
Absorption/Adsorption
Definition
Assimilation of molecular species throughout the bulk of the solid or liquid is termed as absorption./Accumulation of the molecular species at the surface rather than in the bulk of the solid or liquid is termed as adsorption.
Phenomenon
It is a bulk phenomenon. / It is a surface phenomenon.
Heat exchange
Endothermic process / Exothermic process
Temperature
It is not affected by temperature / It is favoured by low temperature
Rate of reaction
It occurs at a uniform rate. / It steadily increases and reach to equilibrium
Concentration
It is same throughout the material. /Concentration on the surface of adsorbent is different from that in the bulk
12 Recommendations
8th Feb, 2016
Krishnan Umachandran
NELCAST
Sorption isotherms can be generated from an adsorption process or a desorption process; the difference between these curves is defined as hysteresis
5 Recommendations
8th Feb, 2016
Hazim Hashim Tahir
Ministry of Science and Technology, Iraq
Dear Colleagues,
Good Day,
"Sorption is a see also of adsorption.
As nouns the difference between sorption and adsorption is that sorption is (sciences) either of the processes of absorption and adsorption while adsorption is the adhesion of a liquid or gas on the surface of a solid material, forming a thin film on the surface not to be confused with the process of absorption. "
See link, please...
4 Recommendations
8th Feb, 2016
Hazim Hashim Tahir
Ministry of Science and Technology, Iraq
Dear Colleagues,
Good Day,
Please, watch this interesting Youtube about "Absorption And Adsorption":
PS  Sorption is a see also of adsorption
4 Recommendations
8th Feb, 2016
Jeanan Shafiq
Applied Science Private University
Absorption is the process in which a fluid is dissolved by a liquid or a solid (absorbent). Adsorption is the process in which atoms, ions or molecules from a substance (it could be gas, liquid or dissolved solid) adhere to a surface of the adsorbent. Adsorption is a surface-based process where a film of adsorbate is created on the surface while absorption involves the entire volume of the absorbing substance.
4 Recommendations
8th Feb, 2016
Mohamed Dallel
University of Tunis El Manar
Adsorption is the process in which atoms, ions or molecules from a substance  adhere to a surface of the adsorbent.
2 Recommendations
9th Feb, 2016
Yazid Boudjadja
University of Jijel
Sorption : the process in which one substance takes up or holds another (by either absorption or adsorption)
Absorption: a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid.
Adsorption : surface assimilation - the accumulation of molecules of a gas to form a thin film on the surface of a solid.
5 Recommendations
9th Feb, 2016
Hazim Hashim Tahir
Ministry of Science and Technology, Iraq
Dear Colleagues,
Good Day,
"The terms absorption and adsorption are used freely to indicate the same process of taking moisture from the air using desiccants, mostly because we don’t want to complicate the explanation of what our product does. But there is a difference.
Absorption generally refers to two phenomena which are largely unrelated. In one case, it refers to when atoms, molecules, or ions enter some bulk phase – gas, liquid or solid material. For instance, a sponge absorbs water when it is dry.
Absorption also refers to the the process by which the energy of a photon is taken up by another entity, for example, by an atom whose valence electrons make transition between two electronic energy levels. The photon is destroyed in the process. The absorbed energy may be re-emitted as radiant energy or transformed intoheat energy. The absorption of light during wave propagation is often called attenuation. The tools of spectroscopy in chemistry are based on the absorption of photonsby atoms and molecules.
Adsorption is similar, but refers to a surface rather than a volume: adsorption is a process that occurs when a gas or liquid solute accumulates on the surface of a solid or, more rarely, a liquid (adsorbent), forming a molecular or atomic film (the adsorbate). It is different from absorption, in which a substance diffuses into a liquid or solid to form a solution.  This is what happens to calcium chloride desiccants in container shipments.
Sorption encompasses both processes, while desorption is the reverse process."
Please, see the link...
3 Recommendations
10th Feb, 2016
Kamran Hameed
Imam Abdul Rahman bin Faisal University
..
3 Recommendations
10th Feb, 2016
Basheer A. Alshammari
King Abdulaziz City for Science and Technology
the process itself. absorption and adsorption are kind of the Sorption 
2 Recommendations
10th Feb, 2016
Tharanga Bandara
La Trobe University
Sorption is the term used for both absorption and adsorption. Adsorption is the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to a surface.
4 Recommendations
10th Feb, 2016
Luisa Isabel Rodríguez-Bello
Universidad Pedagógica Experimental Libertador
It is a question about terminology, which can be solved consulting a glossary. Look at:
Introduction to the Sorption of Chemical Constituents in Soils by Aaron Thompson  & Keith W. Goyne:
2 Recommendations
11th Feb, 2016
Zarko Vladimir
National Academy of Sciences of Ukraine
Sorption is a physical and chemical process by which one substance becomes attached to another. 
Absorption – "the incorporation of a substance in one state into another of a different state" (e.g., liquids being absorbed by a solid or gases being absorbed by a liquid);
Adsorption – the physical adherence or bonding of ions and molecules onto the surface of another phase (e.g., reagents adsorbed to a solid catalyst  surface).
3 Recommendations
13th Feb, 2016
Nizar Matar
An-Najah National University
Sorption includes both adsorption (which means accumulation of a substance at the surface of a solid or a liquid) & absorption (which means assimilation of a substance within the bulk of a solid or liquid).
Adsorption is usually a physical operation. If the adsorbed material interacts with the surface, then chemisorption occurs "which is a chemical process of temporary nature". Chemisorption ends up by a physical operation called desorption.
Note: In industrial chemistry & chemical engineering, a process & an operation are NOT synonems. A process denotes a chemical change while an operation refers to a physical change.
21 Recommendations
14th Feb, 2016
Akram Mobaraki
Payame Noor University
Papers like about the book is self-centered and content-driven content for college books as PNU ????
1 Recommendation
4th Jan, 2017
Fatima Mohammed Hussen
An-Najah National University
Adsorption describes the  molecules of a fluid (liquid or gas) that concentrated spontaneously on a solid surface by a finite time.
1 Recommendation
13th Sep, 2017
Eslam Salama
City Of Scientific Research And Technological Applications
Sorption describes the actions of absorption and adsorption - desorption is the opposite of sorption. Adsorption and absorption are important processes that occur in chemistry and biology.
The major difference between adsorption and absorption is that one is a surface process and the other a bulk process.
Adsorption — takes place on the surface of a substrate
Absorption — one substance enters the bulk, or volume, of another substance e.g. a gas absorbed by a liquid
3 Recommendations
19th Oct, 2017
Biniyam Amdebrhan
Addis Ababa Institute of Technology
Adsorption is a surface-based process where a film of adsorbate is created on the surface while absorption involves the entire volume of the absorbing substance
1 Recommendation
17th Jun, 2018
Meng Zhang
Zhejiang University
Adsorption seems to share the same meaning with sorption.
2 Recommendations
9th Oct, 2018
Amir Behravan
Virginia Tech (Virginia Polytechnic Institute and State University)
Watching this video will help you to understand the difference between these two concepts:
1 Recommendation
20th Jan, 2019
Broder Merkel
Technische Universität Bergakademie Freiberg
Adsorption is a poorly defined term. It is recommeded to use the term sorption. Sorption describes for example the binding of chemical compounds at the surface of solids. Models to descripe sorption on solids in more detail are ion exchange and surface complexation.
4 Recommendations
21st Jan, 2019
Terkel Christian Christensen
Veolia Water
I think mr. Matar is right. Sorption is both adsorption and absorption. Using the term adsorption we are talking on sorption on something. In my article I use the term adsorption of metals on surface of either FeOOH or MnO2. (adsorption can be on many other surface)
30th Jan, 2019
Jehad Yousef Al-Zou'by
Al-Balqa' Applied University
adsorption is a surface phenomina, matter adsorbed onto surface
absorbtion is into body phenomina
11th Oct, 2020
Saja Mohsen
University of Technology, Iraq
1st Nov, 2020
Monir Rahnamabaghy
University of Guilan
Thanks a lot to @Eslam Salama, @Amir Behravan, and @Saja Mohsen
24th Apr, 2021
Rashidul Islam
The University of Newcastle, Australia
Sorption cover adsorption and absorption (surface and body phenomena, chemical and physical interaction) but adsorption represent only the surface phenomena.
8th Nov, 2022
Fardad Koohyar
Sorption is used for both adsorption and absorption processes. In adsorption, atoms, ions, or molecules (named adsorbate) from gas and liquid phases attach to a surface, while in absorption, atoms, ions, or molecules enter into a bulk of liquid or solid materials.

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