Algerian Journal of Engineering Research
Volume 5, Numéro 2, Pages 35-39
2022-03-15
Experimental Study Of The Elimination Of Catechol By Coagulation Flocculation With Aluminum Sulfates
Authors : Hecini Lynda . Boukarker Hassen . Mellah Abdelkarim . Bacha Naima . Kherifi Wahida .
Abstract
Catechol, pyrocatechol, or o-hydroxyphenol, is used as a topical antiseptic, and in photography, polymerization inhibitors as well as a chemical intermediate, and antioxidant in many industries. It is also used in chemistry laboratories for the detection and determination of many ions. Indeed, this compound therefore frequently contaminates the wastewater generated by several industries. Catechol, like other phenols, is of particular interest from a health point of view because of its toxicity and deleterious effect on the quality of water supplies. The International Agency for Research on Cancer (IARC) has classified catechol in group 2B, a possible carcinogen to humans. To protect human health and ecosystems from the high toxicity of these products, effective treatment of water laden with catechol must be carried out. In conventional water treatment systems, coagulation-flocculation can significantly reduce these organic substances despite their dissolved state. The objective of this study is to assess the elimination of catechol during the process of coagulation-flocculation by aluminum sulphate. Jar-Test tests were performed on this compound dissolved in distilled water without pH adjustment. The results obtained indicate that the low concentrations are better eliminated than the high concentrations. In addition, no stoichiometric law could clearly be demonstrated. The main mechanisms would be phenomena of adsorption and complexation or exchange of ligands with insoluble or soluble aluminum species.
Keywords
Aluminium sulphate ; Coagulation-flocculation ; Jar-Test ; Mechanisms
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