Application of diffusion dialysis for reduction of acidity of real pregnant leach solutions containing Ni and Co ions. Issue 12 (12th August 2020)

• Record Type: Journal Article
• Authors: Janiszewska, Małgorzata; Arguillarena, Andrea; Wajs, Magdalena; Staszak, Katarzyna; Regel-Rosocka, Magdalena
• Is Part Of: Separation science and technology. Volume 55:Issue 12(2020)
• Page Start: 2227
• Page End: 2237
• Publication Date: 2020-08-12
• Subjects: Diffusion dialysis -- pregnant leach solutions -- sulfate/chloride -- Cobalt(II) -- Nickel(II) -- recovery; Separation (Technology) -- Periodicals; 660.284205
• DOI: 10.1080/01496395.2019.1634102
• Languages: English
• ISSNs: 0149-6395

Abstract

ABSTRACT: Diffusion dialysis (DD) was proposed as a pretreatment step to reduce the acidity of real sulfate/chloride pregnant leach solutions containing cobalt(II) and nickel(II). Optimum DD conditions that enable reduction of acidity in the feed while maintaining a high rejection level of metal ions present in PLS were proposed, e.g . for 0.06 dm 3 /min flow of both aqueous phases H + concentration in the dialysate reached 3.8 and 2.99 M for PLS1 and PLS2, respectively. Acid diffusion coefficients varied from 0.32∙10 −6 to 3.15∙10 −6 m/s and decreased with increasing phase flow rates. Moreover, dialysate neutralization was beneficial for the H + reduction in the feed.