Dissolved solids can be removed by filtration.

Dissolved solids can be removed by filtration.

• A. True
• B. Not always
• C. Only with chemical treatment
• D. False

Answer: (D)

Filtration is a physical separation that removes particles by trapping them in a filter media based on size. Dissolved solids, like salts and minerals, are ions and molecules dispersed uniformly in the water at the molecular level, so they aren’t particles that get caught by a pore-sized filter. They pass right through with the water. To remove dissolved solids, you need other treatment methods such as ion exchange, precipitation and solids removal, distillation, or membrane processes like reverse osmosis or nanofiltration. Activated carbon can remove some dissolved organics and tastes/odors, but it doesn’t effectively remove dissolved salts. So, because dissolved solids are not typically removed by standard filtration, the statement is not true.

Filtration is a physical separation that removes particles by trapping them in a filter media based on size. Dissolved solids, like salts and minerals, are ions and molecules dispersed uniformly in the water at the molecular level, so they aren’t particles that get caught by a pore-sized filter. They pass right through with the water.

To remove dissolved solids, you need other treatment methods such as ion exchange, precipitation and solids removal, distillation, or membrane processes like reverse osmosis or nanofiltration. Activated carbon can remove some dissolved organics and tastes/odors, but it doesn’t effectively remove dissolved salts.

So, because dissolved solids are not typically removed by standard filtration, the statement is not true.