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Related Concept Videos

Colloids03:22

Colloids

19.8K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
19.8K
Coagulation01:06

Coagulation

830
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
830
Colloidal precipitates01:09

Colloidal precipitates

3.4K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
3.4K
Colloids and Suspensions01:17

Colloids and Suspensions

2.8K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
2.8K
Factors Affecting Solubility04:01

Factors Affecting Solubility

36.0K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
36.0K
Solubility03:00

Solubility

20.4K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
20.4K

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Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts
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Cellulose-based dispersants and flocculants.

Roya Koshani1, Mandana Tavakolian2, Theo G M van de Ven1

  • 1Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, QC H3A 0B8, Canada. theo.vandeven@mcgill.ca and Quebec Centre for Advanced Materials (QCAM) and Pulp and Paper Research Center, McGill University, 3420 University Street, Montréal, QC H3A 2A7, Canada. roya.koshani@mcgill.ca mandana.tavakolian@mail.mcgill.ca.

Journal of Materials Chemistry. B
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Summary
This summary is machine-generated.

Green cellulose derivatives are emerging as sustainable alternatives to synthetic dispersants and flocculants in bioprocessing. These natural compounds offer eco-friendly solutions for biomedicine and environmental remediation.

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Area of Science:

  • Biotechnology and Green Chemistry
  • Materials Science

Background:

  • Synthetic dispersants and flocculants, like polyacrylamide, pose environmental and safety concerns.
  • There is a growing need for sustainable, biocompatible, and cost-effective alternatives in bioprocessing.

Purpose of the Study:

  • To review the engineering pathways, structural frameworks, and surface chemistry of cellulose-based dispersants and flocculants.
  • To summarize the efficiency and controlling parameters of these natural agents.
  • To highlight recent advances in their applications.

Main Methods:

  • Categorization of cellulose derivatives into "polymeric" and "nanoscale" functional compounds.
  • Analysis of engineering pathways and structural properties.
  • Review of application-specific efficiencies and parameters.

Main Results:

  • Cellulose derivatives show significant promise as effective natural dispersants and flocculants.
  • Both polymeric and nanoscale cellulose compounds exhibit tailored properties for specific applications.
  • Recent advancements demonstrate their utility in biomedicine and environmental remediation.

Conclusions:

  • Cellulose-based agents represent a sustainable and green alternative to synthetic dispersants and flocculants.
  • Their development is expanding the possibilities of green technology in various industrial sectors.
  • Further research into cellulose derivatives will drive innovation in eco-friendly bioprocessing.