Question

EXPLAIN THE WORD - SEDIMENTATION

Answer 1

Answer:

the tendency for particles in suspension to settle out of the fluid in which they are entrained and come to rest against a barrier

Explanation:

in other words, the process in which heavier particles of an insoluble solid in a liquid settle down.

Answer 2

Sedimentation:

• Sedimentation is the decomposition of sediments. It takes place when particles in suspension settle out of the fluid in which they are entrained and come to rest against a barrier.
• This is due to their motion through the fluid in responses to the forces acting on them: these forces can due to gravity, centrifugal acceleration, or electromagnetism.
• Sedimentation has been used to measure the size of large molecules when the force of gravity is augmented with centrifugal force in an ultracentrifuge.
• When particles settle from a suspension reach a hard boundary, the concentration of the particles at the boundary is opposed by the diffusion of the particles.

Classification of sedimentation:

• Type 1 sedimentation
• Type 2 sedimentation
• Type 3 sedimentation

       It is characterized by particles that settle discretely at constant settling velocity, or by the deposition of Iron-rich minerals to streamline down to the point source. Eg: Sand and grit.

        It is characterized by particles that flocculate during sedimentation and because their size is constantly changing and settling velocity is changing. Eg: alum or iron coagulation.

        In the process, the particles are at a high concentration such that the particles tend to settle as a mass and a distinct clear zone and sludge zone are present. It is also known as zone sedimentation.