Cobalt removal from waste‐water by means of supported liquid membranes

Abstract

BACKGROUND: Supported liquid membranes (SLM) are an alternative technique to remove and recover metals from diluted process solutions and waste-water. In the present work, the removal of Co(II) from a synthetic CoSO 4 solution containing initial amounts of cobalt(II) in the range 100-200 ppm (0.1-0.2 g dm −3 ) has been studied on a pilot scale. By performing batch equilibrium experiments, the optimal settings, i.e. the composition of the organic phase, the pH of the feed, the type and concentration of the stripping agent were determined.

Evaluation of process condition impact on copper and lead ions removal from water using goethite incorporated nanocomposite ultrafiltration adsorptive membranes

“…Therefore, membrane-based ion removal technics experienced a highly noticeable growth toward resolving or diminishing problems associated with metal ions present in water streams and wastewaters. Numerous metal ions were targeted for these endeavours, such as copper (Cu 2þ ) (Ghaemi 2016;Hossaini Zahed et al 2019), mercury (Hg 2þ ), zinc (Zn 2þ ) (Borbély & Nagy 2009), lead (Pb 2þ ) (Rahimi et al 2015), cadmium (Cd 2þ ) (Choi & Kim 2003), nickel (Ni 2þ ) (Ho et al 2014), and cobalt (Co 2þ ) (Verbeken et al 2009) ion which are detected in industrial effluents.…”

High Flux Recovery of Copper(II) from Ammoniacal Solution with Stable Sandwich Supported Liquid Membrane

“…Although solvent extraction is an attractive approach and successfully used to recover Cu­(II), , the recovery of low-concentration copper­(II) in ammoniacal solutions inevitably required a large inventory of equipment and solvent. Alternatively, membrane separation, usually including bulk liquid membrane (BLM), emulsion liquid membrane (ELM), supported liquid membrane (SLM) and polymer inclusion membrane (PIM), etc., is a promising technology for the recovery of various low-concentration metal values. − Among them, SLMs are typically used and have been studied for the recovery of metal ions. − By combining extraction and stripping into a single step, membrane separation presents several attractive advantages in comparison with solvent extraction, such as a great potential to reduce costs and energy consumption, high selectivity and enrichment ratio, easy scaleup, and the possible usage of an expensive carrier, etc . However, the low membrane stability and flux are still the great hindrance for the large-scale application of SLMs.…”

Gas permeation behavior of CTA polymer inclusion membrane (PIM) containing an acidic carrier for metal recovery (DEHPA)

“…D2EHPA is a commercial carrier specially suited for metal cations recovery like Pb(II), Cd(II), Zn(II), Ni(II) Co(II) and Cr(III) [29][30][31][32][33][34][35]. It is also used in complexation reactions for several organics such as amino acids, polyamines and cationic dyes [36][37][38][39][40][41].…”