EFFET DE LA COAGULATION-FLOCULATION / POSTCHLORATION SUR LA REACTIVITE DE L’ACIDE PYROMELLITIQUE ET L’ACIDE SALICYLIQUE EN EAU DISTILLEE
Journal Title: Larhyss Journal - Year 2015, Vol 23, Issue 23
Abstract
The objective of this study is to demonstrate the reactivity of simple organic compounds such as pyromellitic acid and salicylic acid towards chlorine on the one hand and the other hand of aluminium sulphate. It is also to test the impact of a combined treatment flocculation / chlorination on the removal of these organic compounds. The results of the coagulation-flocculation trials of salicylic acid and pyromellitic acid with aluminum sulfate in distilled water showed that their removal to a pH = 7 is performed with variable yields according to the organic compound structure. It also showed the complexity of the mechanisms involved and their close dependence on the nature and number of acid groups substituting the aromatic ring. Formation in significant amounts of aluminum hydroxide may be made and then promote a physical adsorption phenomenon or a ligand exchange with the OH- ions to the surface of this hydroxide. Experimental chlorination tests highlighted that chlorine consumption potentials are significant. When the solutions of the organic acids may have undergone a coagulationflocculation followed by a post-chlorination, the products formed are, according to the dosage of chlorine, largely, complex aromatic structures and still absorb in the UV.
Authors and Affiliations
KHELILI H. | Laboratoire en hydraulique souterraine et de surface (LARHYSS) Faculté des Sciences et de Technologie, Université de Biskra, ACHOUR S. | Laboratoire en hydraulique souterraine et de surface (LARHYSS) Faculté des Sciences et de Technologie, Université de Biskra
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