The pollutants like phenol and mercury can be removed from water by:

The correct answer is Filtration.By the Filtration process, The pollutants like phenol and mercury can be removed from the water.Coagulation/filtration is a common treatment that uses AlSO4 that reacts with the mercury to form a solid which can precipitate out of the water.The sludge then must be disposed of in a hazardous waste landfill.This process is beneficial because it costs very little and is reliable.The PHENOLIC compounds removal from water involves absorption and photocatalytic process, USING synthetic or natural particles, such as carbon materials and clays.Activated carbon (AC) is the most used in industry as an adsorbent.Sedimentation is the process of allowing particles in suspension in water to settle out of the suspension under the effect of gravity.The particles that settle out from the suspension become sediment, and in water treatment is known as sludge.When a thick layer of sediment continues to settle, this is known as consolidation.Electro Dialysis (ED) is a membrane process, during which ions are transported through a semi-permeable membrane, under the influence of an electric potential.The membranes are cation or anion-selective, which basically means that either positive ions or negative ions will FLOW through.This technique can be applied to remove ions from water. Particles that do not CARRY an electrical charge are not removed.Biological oxidation is the mechanism where microorganisms degrade ORGANIC matter contaminants of wastewater.They feed on organic matter in the presence of oxygen and nutrients.