Test of removal of metallic cations in waters by using derived compounds of benzimidazole fixed on an inert resin

Within the framework of studies of possible interferences between micro-pollutants of the environment, this research thesis more particularly addresses the study of molecules derived from benzimidazole able to precipitate mercury from residual waters rich in mercury, and also addresses the case of different metallic ions such as silver, cadmium, copper, lead and zinc. The objective is to develop a purification cartridge which fixes active molecules on an inert support, regenerative if possible, to capture these metals without releasing organic products at concentrations which might create new problems. After a bibliographical study on the various studied elements and compounds, the author reports an experimental study with a presentation of analytical methods, of the used and prepared compounds, of the formation of complexes of the different benzimidazole compounds and metals. This experimental study comprises tests of removal of metallic ions by various organic reactants, the study of the formation of complexing resins (fixation of active molecules on an inert mineral support and on an insoluble polymer like epoxy resins, polystyrene-based resins, vinyl and acrylic polymer resins).