Learn flocculated suspension definition, characteristics, importance. Learn how to control and stability of flocculated suspensions.
In chemistry and material science suspensions play a vital role. They are commonly used in various industries, from pharmaceuticals to ceramics. Flocculated suspension is a type of suspension.
What is a flocculated suspension?
This is a heterogeneous mixture in which solid particles are dispersed in a liquid medium. This dispersion forms loose and bulky aggregates known as flocs.
These flocs bound together by weak physical forces, such as Vander Waals forces or polymer bridging. A flocculated suspension sticks together and settle down quickly, forming a clear layer than a well-dispersed suspension.
How are flocs formed in flocculated suspension?
The formation of flocs in a suspension occurs through a process called flocculation. Here are few basic steps of formation of flocs,
- Particles come close together.
- Oppositely charged particles attract and form clusters.
- Charges on particles get neutralized.
- Particles are linked together and create larger floc structures.
- It increased collisions which result in larger flocs.
- Flocs settle more rapidly due to increased size.
- Then water separates from settled flocs.
Characteristics of flocs
Here are some ideal properties flocs in flocculated suspension,
- Flocculated suspensions have visibly larger aggregates.
- Flocs in suspensions settle more quickly.
- Are less stable than well-dispersed suspensions.
- Flocs improve the efficiency of sedimentation.
- Increased interparticle interactions.
- Can exhibit altered flow behavior.
Applications
- Used to clean water by removing impurities.
- It gives shape to materials for better quality.
- Enables the development of new materials.
- Used in wastewater treatment and soil stabilization.
- Saves money in solid-liquid separation processes.
How to control and stability of flocculated suspension?
Controlling the flocculation process and maintaining suspension stability is important for various industry. The addition of flocculating agents, such as polymers or coagulants, can help to regulate the flocculation rate and enhance floc formation.
And adjusting the pH, temperature or ionic strength of the suspension can influence the stability and size of the flocs. To get desired flocculation characteristics requires careful optimization and understanding of the suspension system.