Direct leach approaches to Platinum Group Metal (PGM) ores and concentrates: A review

Mpinga, Cleophace Ngoie; Eksteen, Jacques; Aldrich, Chris; Dyer, Laurence

doi:10.1016/j.mineng.2015.04.015

Cited by 94 publications

(43 citation statements)

References 91 publications

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“…Among PGMs, the major economic importance has Pt, Pd and Au [22]. Paladium has been obtained using diverse microorganisms and biofilms [23].…”

Section: Why Bio-processes?mentioning

confidence: 99%

Considerations about recovery of critical metals using bio-metallurgy

Gherghe

2017

E3S Web Conf.

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Abstract. The increased requirement of critical metals due to green technologies needs, together with the geopolitical environment to ensure these metals, has entailed decisive measures to avoid current supply insecurities in each country. These metals are essential to the products and services made and used daily, and contribute to sustaining and growing the economy. Thus, sustainable approaches from technological, environmental, economic and social point of view are needed to recover these metals from different resources. By using resources more efficiently, innovating in the concept of circular economy, it can be assure re-using, re-manufacturing or recycling of valuable materials. In this paper are presented some considerations related to using the waste dumps as potential resources to obtain critical metals by biometallurgical processes.

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“…Among PGMs, the major economic importance has Pt, Pd and Au [22]. Paladium has been obtained using diverse microorganisms and biofilms [23].…”

Section: Why Bio-processes?mentioning

confidence: 99%

Considerations about recovery of critical metals using bio-metallurgy

Gherghe

2017

E3S Web Conf.

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“…28 kPa at 35 o C) [21]. Contrarily, other researchers indicate that the use of the adequate complexing agents like bromide or organic ammonium perhalides can resolve this problem [22].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical recycling of waste printed circuit boards in bromide media. Part I: preliminary leaching and dismantling tests

Dorneanu¹

2017

Studia UBB Chemia

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ABSTRACT. In the context of the large and increasing interest for an efficient and ecological recycling of the Waste Electrical and Electronic Equipments (WEEEs), we decide to evaluate the feasibility of an electrochemical recycling process for waste printed circuit boards (WPCBs) based on bromine-bromide leaching system. For this preliminary study, a perforated rotating drum chemical reactor (RDCR), interconnected with a divided electrochemical reactor (DER) in a closed hydraulic loop, was successfully used to dismantle consecutively three computer motherboards (CMB) after a minimal mechanical pre-treatment. Essentially, the base metals were leached at the RDCR level and the bromine-bromide system was regenerated at the DER level, simultaneously with the partial electrodeposition of dissolved metals. Even if the operating parameters were not optimized, each CMB was completely dismantled in around 18 h, with cathodic and anodic mean current efficiencies of 43.6% and 58.4%, respectively. Notably, grace to the proposed process, the remaining undissolved parts (fiberglass reinforced epoxy boards, electronic components, plastics, etc.) preserve their original shape and structure, allowing an easier consequent separation-classification and a more efficient and profitable recycling.

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“…Osmium is rarely used [38]. Natural deposits of platinum and PGMs can be found in Russia, North America, Canada, and South Africa.…”

Section: Introductionmentioning

confidence: 99%

“…Usually, PGMs are recovered as byproduct or co-product depending on their abundance in the ore [42]. PGMs have distinguishing characteristics such as high melting point, chemically inert to different substances (even at high temperatures), corrosion resistant, electrical resistivity, catalytic properties, and brilliant color that have been exploited in various industrial applications [38,43,44]. These excellent chemical and physical properties propelled the huge demand and increasing number of applications for PGMs in various fields.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Adsorbents for the Recovery of Precious Metals from Leach Solutions and Wastewater

Aghaei

Alorro

Encila

et al. 2017

Metals

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Precious metals which include the platinum group, gold, and silver, play indispensable roles in high technology industries of the modern world due to their outstanding physical and chemical properties. As a result of diminishing availability of mineral sources, increasing demand, and environmental concerns, the recovery of precious metals from both leaching and industrial waste solutions is becoming a very important technology. Magnetic solid phase extraction (MSPE) is a technique that has received substantial consideration in the separation and recovery of precious metals because of the many advantages it offers compared to conventional methods. This technique is based on the extraction of different analytes from solutions using solid adsorbents with magnetic properties. This review focuses on different types of magnetic adsorbents, the main procedures used for synthesis, characterization and their application in precious metals recovery based on recently published literatures.

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Direct leach approaches to Platinum Group Metal (PGM) ores and concentrates: A review

Cited by 94 publications

References 91 publications

Considerations about recovery of critical metals using bio-metallurgy

Considerations about recovery of critical metals using bio-metallurgy

Electrochemical recycling of waste printed circuit boards in bromide media. Part I: preliminary leaching and dismantling tests

Magnetic Adsorbents for the Recovery of Precious Metals from Leach Solutions and Wastewater

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