What is the meaning of polyelectrolyte?
Definition of polyelectrolyte : a substance of high molecular weight (such as a protein) that is an electrolyte.
What is the polyelectrolyte effect?
Early in the 1940s Fuoss [5] defined a phenomenon called “polyelectrolyte effect”, i.e. reduced viscosity of polyelectrolyte solutions increases as the solution is diluted, which is totally different from that of neutral polymers.
What is polyelectrolyte flocculation?
Polyelectrolyte flocculants are polymers that are either branched or linear, but carrying ionic charge along their chain. They are accordingly classified as cationic, anionic or non-ionic polymers. These flocculants neutralise surface charges on cells and bind particles together by physical or chemical forces.
What is polyelectrolyte dosing?
Polyelectrolyte dosing pump consists of solution preparation tank along with dosing tank. This polyelectrolyte dosing system is designed under the strict vigilance of experts. It is tested by using the latest techniques to ensure that it is free from all kinds of defects.
What is polyelectrolyte in wastewater treatment?
Polyelectrolytes are chemical flocculants used in water treatment; they act mainly in the coagulation-flocculation stage and in the conditioning/thickening of the sludge line.
What is the use of polyelectrolyte in water treatment?
What are the different formations and arrangement of Pec?
Structural models of PECs. The three different types of structures can result, while in solution, from polycation–polyanion interactions, namely (i) water soluble, (ii) colloidally stable, and (iii) two phase systems (Koetz and Kosmella 2007. 2007.
How do you make a polyelectrolyte solution?
The preparation process is based on three stages: dissolution, maturation and transfer.
- Dissolution. The polymer is humidified and dossolved by slow agitation, favouring the homogenization of the solution.
- Maturation. The solution is kept in continuous and slow agitation.
- Transfer.
Why is polyelectrolyte used in water treatment?
What is polyelectrolyte adsorption?
Polyelectrolyte adsorption. Adsorption of polyelectrolytes on solid substrates is a surface phenomenon where long-chained polymer molecules with charged groups (dubbed polyelectrolytes) bind to a surface that is charged in the opposite polarity.
How do polyelectrolytes affect the conformation of polymers?
The interactions between a polyelectrolyte and the solvent it is placed in have a large effect on the conformation of the polymer both in solution and upon deposition onto the substrate.
Why do polyelectrolyte solvents reduce the electrostatic repulsion?
This is due to the screening the solvent molecules perform between the charged repeat units of the polyelectrolyte, decreasing the electrostatic repulsion the polymer chain experiences.
Why do Polyelectrolytes have a large surface area?
Because the polymer molecules are so long, they have a large amount of surface area with which to contact the surface and thus do not desorb as small molecules are likely to do. This means that adsorbed layers of polyelectrolytes form a very durable coating.