Solvent Extraction, Membranes, and Ion Exchange in Hydrometallurgical Dilute Metals Separation

Tavlarides, Lawrence L.; Bae, Ji‐Hong; Lee, C. K.

doi:10.1080/01496398708068970

Cited by 176 publications

(65 citation statements)

References 48 publications

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“…A higher solvent loss during the process of extraction reduces not only transport efficiency considerably, but also more number of stages for the separation of pure products. [5,6] Emulsion liquid membranes (ELM) on the other hand exhibit greater potential, particularly in processing dilute feed streams for the separation and removal or recovery of metal ions. [7] ELMs proved to be an effective and inexpensive method in a variety of fields such as the recovery of various metal ions, [8 -14] removal of acetic acid, [15] removal of phenolic compounds and lactic acid [16,17] and recovery of pharmaceutical substances.…”

Section: Introductionmentioning

confidence: 99%

Removal of copper and zinc from aqueous solutions and industrial effluents using emulsion liquid membrane technique

Venkatesan

Begum

2008

Asia-Pacific J Chem Eng

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Copper and zinc were removed from dilute aqueous solutions together with recovery of copper from electroplating wastewater containing copper ions by emulsion liquid membrane (ELM) technique. The effects of surfactant concentration, carrier concentration, emulsification speed, emulsification time, internal phase stripping agent concentration, and aqueous-to-organic phase (A/O) volume ratio on the emulsion stability and breakup have been studied in detail and reported. A mixture of kerosene as diluent, span 80 as surfactant, di-(2-ethylhexyl) phosphate as carrier was used. An experimental study was performed to optimize the pH of the aqueous external phase based on distribution coefficient of solute between aqueous external phase and organic (membrane) phase. The batch extraction was carried out under various experimental conditions such as agitation time, agitation speed, membrane-to-external phase (M /E ) ratio, solute concentration in the feed phase and carrier concentration in membrane phase on the percentage recovery of zinc and copper ions in their respective feed streams and the operating parameters have been optimized for maximum recovery. It was found that 84% of copper and 86% of zinc were removed from aqueous solution with a concentration factor of 5. It was also found that ELM extraction of copper from wastewater was around 8-17% less than that of the synthetic solution. 

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Section: Introductionmentioning

confidence: 99%

Removal of copper and zinc from aqueous solutions and industrial effluents using emulsion liquid membrane technique

Venkatesan

Begum

2008

Asia-Pacific J Chem Eng

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“…They also combine the fast mass transfer rates, high distribution and selectivity factors characteristic of the extractants dissolved in a liquid organic phase, with the simplicity of equipment and operation distinctive to ion exchange technology (Cortina et al, 1994). Consequently, these resins are very suitable for metal separation and recovery (Warshawsky, 1981;Tavlarides et al 1987) …”

Section: Organic Extractant Impregnated Resinsmentioning

confidence: 99%

Removal of zinc from a base‐metal solution using ion exchange at Rustenburg Base Metal Refiners

Taute¹,

Sole²,

Hardwick³

2014

J of Chemical Tech & Biotech

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Anglo American Platinum's expansion project, which aimed at increasing platinum production to 3.5 million oz per annum, necessitated an expansion in the Rustenburg Base Metal Refinery (RBMR) to accommodate the associated increase in the production of base metals (Cu, Ni, and Co). RBMR's name plate capacity increased from 21 000 to 33 000 tonnes of nickel per annum.The expansion project involved various brownfield and greenfield installations and was completed in 2011.The new circuit and various process additions posed a significant risk to the nickel cathode quality with regard to zinc contamination. Mass balancing of the pre-expansion circuit showed that as much as 50% of the zinc entering the plant would exit through the nickel cathode, thus making it the major bleed for zinc from the circuit. The expansion circuit mass balance showed that although a portion of the zinc would exit through the pressure iron removal residue, this small bleed stream would not be sufficient to ensure that the nickel cathode does not exceed 50 ppm (LME specification). Another factor contributing to the zinc problem was the fact that more Platreef ore, with higher zinc levels, was being mined. These factors indicated that a dedicated zinc removal section was required to ensure a sustainable nickel cathode production containing less than 50 ppm zinc.The objective of this research project was to find an ion-exchange resin that effectively removed

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“…As metal ores in the world are becoming lean and increasingly complex, hydrometallurgical techniques are used extensively and widely in metal extraction from low-grade resources [1]. Nowadays, some metals are produced to a large extent or completely by hydrometallurgy, e.g., zinc [2], gold [3,4], aluminum [5], uranium [6], and rare earth elements (REEs) [7].…”

Section: Introductionmentioning

confidence: 99%

Recovery and Separation of Metal Ions from Aqueous Solutions by Solvent‐Impregnated Resins

et al. 2016

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The recovery and separation of metals from aqueous solutions is one of the research hotspots in hydrometallurgy, environment protection, analytical chemistry, etc. Much attention has been paid to solvent-impregnated resins (SIRs) since these were firstly proposed for the extraction of metals. SIRs are characterized by high efficiency and selectivity, convenient preparation, and easy operation because they combine the unique advantages of solvent extraction and ion exchange. The preparation and features of SIRs are summarized and their applications in the extraction of various metals from solutions are reviewed. In addition, the equilibrium, thermodynamics, and sorption kinetics of the metals onto SIRs are elucidated in detail.

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Solvent Extraction, Membranes, and Ion Exchange in Hydrometallurgical Dilute Metals Separation

Cited by 176 publications

References 48 publications

Removal of copper and zinc from aqueous solutions and industrial effluents using emulsion liquid membrane technique

Removal of copper and zinc from aqueous solutions and industrial effluents using emulsion liquid membrane technique

Removal of zinc from a base‐metal solution using ion exchange at Rustenburg Base Metal Refiners

Recovery and Separation of Metal Ions from Aqueous Solutions by Solvent‐Impregnated Resins

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