geadsorbeerd

Geadsorbeerd is the past participle form of the Dutch verb adsorberen, used in Dutch-language literature to indicate that a substance has adsorbed onto a surface. In surface science, adsorption refers to the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved phase to an interface, resulting in a concentrated layer at the surface. Adsorbed species are distinguished from those that are absorbed into the bulk of a material.

Adsorption occurs via physical forces (physisorption) or chemical bonds (chemisorption). Physisorption involves van der Waals interactions and is usually reversible and weaker; chemisorption involves stronger chemical bonds and may alter the surface.

Common adsorbents include activated carbon, silica, alumina, zeolites, and metal surfaces; adsorbates include gases such as CO and H2, liquids, dyes, or biomolecules.

Characterization often uses adsorption isotherms (Langmuir, Freundlich) and models such as BET to estimate surface area and capacity. Techniques such as infrared spectroscopy, X-ray photoelectron spectroscopy, and quartz crystal microbalance detect and quantify geadsorbeerde species.

Applications include catalysis, environmental remediation, gas storage, and sensors. Examples include CO on platinum, dyes on activated carbon, and water contaminants on zeolites.

Geadsorbeerd remains a central concept in surface chemistry, linking fundamental interfacial interactions with practical material design.