desorption
Very Low / C2Highly Technical / Scientific
Definition
Meaning
The process in which a substance (typically an adsorbed gas, liquid, or dissolved ion) is released from the surface of a solid or liquid material.
In a broader sense, it can refer to the detachment or removal of molecules or atoms bound to an interface. It is the reverse of adsorption or absorption.
Linguistics
Semantic Notes
The term is almost exclusively used in chemistry, physics, materials science, and engineering. It is a process-oriented noun. The opposite process is 'adsorption' or 'absorption', which are distinct phenomena.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences.
Connotations
Purely technical, identical connotations in both variants.
Frequency
Equally rare and specialized in both AmE and BrE.
Vocabulary
Collocations
Grammar
Valency Patterns
[material] undergoes desorption of [substance][substance] desorption from [material]desorption of [substance] by/using [method]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Virtually never used.
Academic
Core term in surface chemistry, catalysis, environmental engineering, and gas storage research.
Everyday
Unheard of in general conversation.
Technical
Essential term for describing processes in vacuum technology, semiconductor manufacturing, sensor operation, and pollutant remediation.
Examples
By Part of Speech
verb
British English
- The filter will desorb the trapped gases when heated.
- The material was found to desorb moisture slowly.
American English
- The catalyst needs to be regenerated to desorb the reaction byproducts.
- Heating the sample caused it to desorb the solvent.
adverb
British English
- The compound was desorbed thermally.
- The gas was released desorptively from the matrix.
American English
- The contaminants were removed desorptively via steam.
- The molecules bind adsorptively but release desorptively.
adjective
British English
- The desorption characteristics of the new polymer were analysed.
- A high desorption temperature indicates strong surface bonding.
American English
- They studied the desorption properties of the alloy.
- The desorption phase of the cycle was complete.
Examples
By CEFR Level
- The cleaning process relies on the desorption of dirt particles.
- Scientists are studying how to improve the desorption of hydrogen from storage tanks.
- Temperature-programmed desorption (TPD) revealed two distinct binding sites on the catalyst surface.
- The efficiency of the air scrubber depends on the adsorption-desorption equilibrium of volatile organic compounds.
Learning
Memory Aids
Mnemonic
Think 'DE-tach' + 'SORPtion' (like absorption). 'Desorption' is the DE-taching or RE-leasing part of a sorption cycle.
Conceptual Metaphor
A 'sticky note' falling off a surface; a 'sponge' releasing the liquid it holds.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- May be confused with 'десорбция', which is a direct cognate and correct. However, learners might incorrectly associate it with 'описание' (description) due to phonetic similarity in the second syllable.
Common Mistakes
- Spelling it as 'desorbtion' (incorrect). Confusing it with 'description'. Using it as a verb (the verb is 'to desorb').
Practice
Quiz
Desorption is the opposite process of:
FAQ
Frequently Asked Questions
Absorption involves a substance being taken in throughout the bulk of a material (like water into a sponge). Desorption is the release of a substance from a surface or interface, and is specifically the reverse of *adsorption* (surface attachment).
No, it is a highly specialized scientific term. You will only encounter it in technical literature related to chemistry, physics, engineering, or environmental science.
No, 'desorption' is a noun. The corresponding verb is 'to desorb' (e.g., 'The heat caused the gas to desorb').
Key industries include: chemical manufacturing (catalyst regeneration), semiconductor fabrication (vacuum processes), environmental cleanup (soil and air purification), hydrogen fuel storage, and analytical chemistry (chromatography).