Question

what is the role of alum in the process of sedimentation​

Answer 1

Answer:

For water and wastewater treatment, the coagulants used more frequently are the inorganic salts of aluminum. When added to water, Al ions hydrolyze rapidly and form a range of metal hydrolysis species (Jiang 2015). These cationic species adsorb onto the negatively charged particles and neutralize the charge

Answer 2

Answer:

Loading is a process in which heavy particles settle down at the bottom of the container and water comes up .

Alum is a substance which is used to fast the process of loading.. when alum is dropped in solution then the heavy particles of that solution becomes more heavy due to alum's chemical reacts with them and made them more heavier than before.and after becoming more heavier the particles settle depending fastly..