外文翻译---利用冶金渣副产物去除酸性矿山废水中的污染物.docx

Removal of pollutants from acid mine wastewaterusing metallurgical by-product slagsD. Fenga,?, J.S.J. van Deventer a, C. Aldrich baDepartment of Chemical and Biomolecular Engineering, The University of Melbourne, Melbourne, Vic., 3010, Australiab Department of Chemical Engineering, University of Stellenbosch, Private Bag X1, Matieland, 7602, Stellenbosch, South AfricaReceived in revised form 8 January 2004; accepted 12 January 2004AbstractTheremoval of pollutants from acid mine drainage using metallurgicalby-product slags was studied in laboratory scale. Metallurgicalby-product furnace slags were used as sorbents for metal ions and dispersed air column flotation was employed for the solid/liquid separationof the loaded slags. Batch sorption/pH/kinetic studies were conducted using simulated Cu and Pb bearing wastewater. The calcium glasstype of slags had high surface area and porosity. Promising result was succeeded from the combined process of slag sorption/flotation on thetreatment of an acid mine drainage from a South African gold mine.? 2004 Elsevier B.V. All rights reserved.Keywords: Furnace slag; Sorption; Flotation; Wastewater treatment; Acid mine drainage1. IntroductionVarious methods exist for the removal of toxic metalions from aqueous solution, viz. ion exchange, reverse osmosis,precipitation and adsorption, among others. Adsorptionis by far the most versatile and widely used process.Activated carbon has been the standard adsorbent for thereclamation of municipal and industrial wastewaters. Owingto the high-cost of activated carbon, production of itslow-cost alternatives has been the focus of research in thisarea for years. These sorbents for the heavy metals sorptionranged from natural materials to industrial and agriculturalby-products, such as fly ash, carbonaceous material, metaloxides, zeolites, moss, hydroxides, lignin, clays, biomass,peanut hulls, pyrite fines, goethite and coral sand.Furnace slags as metallurgical by-products are beingused as fille