Coagulation D'une Eau de Surface et des Solutions D'un Acide Fulvique Par Le Sulfate d'Aluminium: Influence du Charbon Actif En Poudre Coagulation of Surface Water and Some Solutions of a Fulvic Acid by Aluminium Sulfate: The Effects of a Powdered Activated Carbon

Abstract

The aim of this study is to show the effects of a powdered activated carbon (PAC) on the efficiency of organic matter removal upon surface water coagulation with aluminium sulfate. The results show that powdered activated carbon increases the efficiency of organic matter removal (70% in the presence and 45% in the absence of PAC) and reduces the optimal dose of the coagulant in the case of high levels of organic matter concentrations (50 mg l−1 in the presence and 75 mg l−1 in the absence of PAC). The optimal pH is not changed in the presence of PAC. In addition, the results show that pre-chlorination increases the efficiency of organic matter removal. It also shown that the efficiency of phenol removal is slightly reduced in the presence of high doses of aluminium sulfate.