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Related Concept Videos

Adhesion01:14

Adhesion

Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecules in the silica than to the oxygen in neighboring water molecules.
Capillary action is a result of water’s adhesive tendencies. When a narrow glass...
Adsorption of Gases on Solids01:28

Adsorption of Gases on Solids

Adsorption is a process where molecules, known as the adsorbates, accumulate on a surface, which is referred to as the adsorbent or substrate. Occurring at the solid-gas interface, this phenomenon is crucial in various scientific and industrial contexts. The reverse of adsorption is desorption.Two types of adsorptions exist: physical (physisorption) and chemical (chemisorption). Physisorption involves gas molecules held to the solid's surface by relatively weak intermolecular van der Waals...
Cohesion01:07

Cohesion

Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a surface,...
Hydration of Cement01:24

Hydration of Cement

Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
Carbonation Shrinkage01:24

Carbonation Shrinkage

Atmospheric CO2 penetrates the concrete's pores and, in the presence of moisture, forms carbonic acid, which then reacts with calcium hydroxide in the hydrated cement, forming calcium carbonate. This process reduces the concrete's volume and is termed carbonation shrinkage.
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction facilitates the...
Carbon-dioxide Fixation01:28

Carbon-dioxide Fixation

Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...

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In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
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CO2 adhesion on hydrated mineral surfaces.

Shibo Wang1, Zhiyuan Tao, Sara M Persily

  • 1Civil and Environmental Engineering, Thornton Hall, University of Virginia , 351 McCormick Road, Charlottesville, Virginia 22904, United States.

Environmental Science & Technology
|September 18, 2013
PubMed
Summary

Mineral surfaces can unexpectedly adhere carbon dioxide (CO2), altering their wettability. This CO2 adhesion is influenced by surface roughness, aqueous chemistry, ionic strength, and CO2 partial pressure.

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Area of Science:

  • Geochemistry
  • Environmental Science
  • Materials Science

Background:

  • Mineral surfaces are typically hydrophilic but can exhibit adhesion to nonpolar fluids like carbon dioxide (CO2).
  • This adhesion impacts multiphase flow processes in porous media, affecting wettability and trapping mechanisms.

Purpose of the Study:

  • To investigate the conditions governing the adhesion of CO2 to homogeneous mineral surfaces.
  • To understand how surface properties and aqueous chemistry influence CO2-mineral interactions.

Main Methods:

  • Static pendant contact angle measurements.
  • Captive advancing/receding contact angle tests.
  • Analysis of mineral surface roughness and aqueous solution chemistry.

Main Results:

  • CO2 adhesion was observed on rough surfaces (~10 nm) of phlogopite mica, silica, and calcite.
  • Adhesion prevalence increased with ionic strength and CO2 partial pressure.
  • Adhesion was minimal in acidic or basic brines, and contact angles could increase threefold.

Conclusions:

  • CO2 adhesion to mineral surfaces is sensitive to surface roughness and aqueous chemistry.
  • Electrical double layer properties and surface functional groups play a role in nonpolar fluid adhesion.
  • Understanding these interactions is crucial for predicting multiphase flow in geological systems.