Comparison between Alum, Poly Aluminum Chloride , Ferric Chloride with Aloe vera as a Coagulants

Abstract

Coagulants of all kind are very important in the process of purifying water from turbidity and pollutants, so comparisons are made between  four types of a coagulants used during the chlorinated drinking water purification process are alum, iron chloride, aluminum chloride polymer and a mixture of alum (5mg/l) with three concentrations of aloe vera, solution which is (5%,10%,20%) .The results showed that the 20% concentrated aleo vera with 5mg/l alum gives a high removal of the turbidity by up to 90% compared to other coagulants.