desorption

Thân thiện

A scientist observes desorption in a laboratory experiment.

Definition

1. Noun:
   • The process of releasing a substance from a surface: Desorption is the physical process where atoms, ions, or molecules are released from a surface they were previously attached to (adsorbed onto), transitioning into a gaseous or liquid state.

Usage Examples

• Noun:
  • The desorption of carbon dioxide from the activated carbon was studied.
  • Temperature is a key factor controlling the rate of desorption.
  • The experiment measured the desorption of water vapor from the silica gel.

Advanced Usage

• Thermal desorption: A technique where heat is applied to drive adsorbed substances off a surface for analysis or cleaning.
  • Thermal desorption is commonly used in environmental testing to analyze soil contaminants.
• Description in scientific contexts: The term is primarily used in chemistry, physics, materials science, and environmental engineering to describe the reverse of adsorption.
  • The adsorption-desorption cycle is fundamental to the operation of many industrial filters and catalysts.

Variants and Related Words

• Desorb (verb): To release or be released from a surface in this manner.
  • The molecules will desorb when the pressure is lowered.
• Adsorption (noun): The complementary process of accumulating substances on a surface.
  • Adsorption and desorption are opposing processes in surface chemistry.

Synonyms

• Release (from a surface)
• Emission (in specific technical contexts)

Related Phrases

• Desorption isotherm: A graph showing how much of a substance desorbs under varying conditions like pressure or concentration.
  • The desorption isotherm revealed hysteresis in the process.
• Description energy: The energy required to initiate the desorption process.
  • The desorption energy for that compound on the metal surface is relatively high.

Học thuật

Noun

1. changing from an adsorbed state on a surface to a gaseous or liquid state