FLOTATION REMOVAL OF AS(V) ONTO GOETHITE

Arsenic oxyanions, considered as priority pollutants, were removed fro m dilute aqueous solutions by sorption onto synthetic goethite, a typi cal inorganic adsorbent. Flotation was subsequently applied as an effe ctive solid/liquid separation method. The combined process produced a foam concentrate, containing the arsenic-loaded goethite particles. Th e dispersed-air flotation technique was used for the generation of fin e gas bubbles. The main parameters affecting the process were studied and promising results, in terms of arsenic removal and of goethite sep aration, were obtained. (C) 1997 Elsevier Science Ltd.