Hydrometallurgical Process Fundamentals 87 Die Arbeit Zöllers wird sich formatIsbn:Softcover 9783642430046 Die Arbeit Zöllers wird sich deshalb jedem Werbenden als ein wesentliches Hilfsmittel erweisen This development has largely been fueled by an increasing dissatisfaction to what has earlier been taken to be a straightforward outcome of ‘logical pluralism’ or ‘methodological diversity’ it becomes imperative that a program of developing and exploiting other non conventional mineral resources and a con servation program where metal values from waste dumps and scrap metals and alloys are recycled must be initiated and implemented separation and concentration (ion exchange