title: Copper and zinc removal from aqueous solution by mixed mineral systems II. The role of solution composition and aging.
abstract: This study investigates Cu and Zn removal onto binary mixed mineral sorbents from simulated wastewater, relevant to streams impacted by acid mine drainage and effluents. Mixed suspensions of kaolinite/montmorillonite and kaolinite/goethite exhibited different sorption behavior from the single mineral components, reducing Cu and Zn removal (except Cu sorbed on montmorillonite/goethite) over the range of pH investigated. Cu and Zn removal by the electrolyzed systems showed a complex response to increased ionic strength, which increased solid concentration, leading to lower Cu and Zn sorption. Enhanced Cu sorption on the montmorillonite/goethite as age increased may be attributed to increased hydroxylation of the mineral surface resulting in the formation of new reactive sites.
authors: School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom. eenonidavidson@hotmail.com
authors: D E
authors: DE
authors: Egirani
authors: A R
authors: AR
authors: Baker
authors: J E
authors: JE
authors: Andrews