"Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface."
The process in which a substance adheres to the surface of another substance.
Introduction to Adsorption: This topic introduces the concept of adsorption, its importance and applications in various fields.
Types of Adsorption: It discusses physical and chemical adsorption and their differences.
Adsorption Isotherm: This topic covers the relationship between the adsorbate concentration and the amount of adsorbent needed to reach equilibrium.
Adsorbent Materials: It discusses various materials that can be used as adsorbents like activated carbon, silica gel, zeolite, etc.
Adsorption Kinetics: This topic covers the rate at which adsorption occurs and how it is influenced by various factors.
Surface Area and Pore Structure: It discusses the surface area of the adsorbent and pore structure and how they affect adsorption.
BET Equation: This equation is used to measure the surface area of the adsorbent.
Langmuir and Freundlich Isotherms: These are two models used to describe the adsorption behavior.
Adsorption Thermodynamics: This topic explains the thermodynamics of adsorption, including enthalpy, entropy, and Gibbs free energy.
Factors Affecting Adsorption: This topic lists the factors that affect adsorption, including temperature, pressure, surface area, and pH.
Adsorption in Liquid Phase: This topic discusses the different ways adsorption occurs in the liquid phase.
Applications of Adsorption: This topic discusses the applications of adsorption in various fields like water purification, gas separation, and drug delivery.
Adsorption Techniques: This topic covers various techniques used to study adsorption like isothermal titration calorimetry, adsorption chromatography, and surface area measurements.
Characterization of Adsorbents: It discusses the different methods for characterizing the adsorbents like X-ray diffraction, Scanning Electron Microscopy, and Fourier Transform InfraRed Spectroscopy.
Adsorption in Biological Systems: This topic covers the role of adsorption in biological systems like cell membranes and proteins.
Physical Adsorption: It is a type of adsorption that occurs due to weak forces of attraction such as Van der Waals forces between the surface of the adsorbent and the adsorbate molecules.
Chemical Adsorption: This type of adsorption involves the formation of a chemical bond between the adsorbent and the adsorbate molecules, leading to strong adsorption.
Physisorption: It is the physical adsorption of a gas or a vapor onto the surface of a solid, in which the gas molecules are held by weak van der Waals forces.
Chemisorption: It is a chemical adsorption process where the adsorbate forms a chemical bond with the adsorbent, resulting in stronger adhesion.
Exclusion Adsorption: This type of adsorption occurs when adsorbate molecules are repelled from the surface of the adsorbent, leading to exclusion of certain molecules.
Surface complexation Adsorption: It is a type of adsorption in which the adsorbate forms a complex with the surface functional groups of the adsorbent, leading to strong adsorption.
Ion Exchange Adsorption: It is the adsorption of ions onto the surface of the adsorbent through the exchange of equivalent ions.
Chelation Adsorption: This type of adsorption occurs when the adsorbate forms a complex with a chelating agent on the surface of the adsorbent.
Van der Waals Adsorption: It is a physical adsorption process that occurs due to the presence of weak van der Waals forces between the adsorbent and the adsorbate.
Electrostatic Adsorption: It is the adsorption of ions onto the surface of the adsorbent due to the presence of electrostatic forces.
Absorption Adsorption: It is a type of adsorption in which the adsorbate is taken up by the adsorbent through a process of absorption, leading to strong adsorption.
Catalytic Adsorption: It is a type of adsorption in which the adsorbate molecules are activated by the adsorbent, leading to a catalytic reaction.
Molecular Sieve Adsorption: It is a type of physical adsorption in which the adsorbate molecules are trapped within the pores of the adsorbent due to size exclusion.
Entropic Adsorption: It is the adsorption of molecules onto the surface of the adsorbent due to the effect of the entropy of the system.
"This process differs from absorption, in which a fluid (the absorbate) is dissolved by or permeates a liquid or solid (the absorbent)."
"Yes, adsorption is a surface phenomenon and the adsorbate does not penetrate through the surface and into the bulk of the adsorbent."
"The adsorption process is generally classified as physisorption (characteristic of weak van der Waals forces) or chemisorption (characteristic of covalent bonding)."
"Yes, adsorption can occur due to electrostatic attraction."
"For example, polymer physisorption from solution can result in squashed structures on a surface."
"Heterogeneous catalysts, activated charcoal, capturing and using waste heat, adsorption chillers, synthetic resins, increasing storage capacity of carbide-derived carbons, and water purification."
"Adsorption, ion exchange, and chromatography are sorption processes in which certain adsorbates are selectively transferred from the fluid phase to the surface of insoluble, rigid particles suspended in a vessel or packed in a column."
"The word 'adsorption' was coined in 1881 by German physicist Heinrich Kayser (1853–1940)."
"Like surface tension, adsorption is a consequence of surface energy."
"Although adsorption does often precede absorption."
"In a bulk material, all the bonding requirements (be they ionic, covalent, or metallic) of the constituent atoms of the material are fulfilled by other atoms in the material."
"Physisorption is characteristic of weak van der Waals forces."
"Chemisorption is characteristic of covalent bonding."
"Adsorption is present in many natural, physical, biological, and chemical systems."
"The term 'sorption' encompasses both adsorption and absorption."
"Pharmaceutical industry applications use adsorption as a means to prolong neurological exposure to specific drugs or parts thereof."
"Activated charcoal is widely used in industrial applications."
"Adsorption is widely used in...water purification."
"Heterogeneous catalysts are used in industrial applications."