A Potential Alternative for Precious Metal Recovery from E-waste: Iodine Leaching

Sahin, Merve; Akçıl, Ata; Erüst, Ceren; Altynbek, Shinar; Gahan, Chandra Sekhar; Tuncuk, Ayşenur

doi:10.1080/01496395.2015.1061005

Cited by 34 publications

(38 citation statements)

References 24 publications

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“…Research is centred around optimising the use of leaching agents that meet these criteria [147]. Numerous studies have focused on the application of hydrometallurgy for the recovery of base and precious metals from e-wastes [148][149][150][151][152][153][154][155][156][157][158].…”

Section: Hydrometallurgymentioning

confidence: 99%

E-Waste Recycling and Resource Recovery: A Review on Technologies, Barriers and Enablers with a Focus on Oceania

Yken

Boxall

Cheng

et al. 2021

Metals

107

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Electronic e-waste (e-waste) is a growing problem worldwide. In 2019, total global production reached 53.6 million tons, and is estimated to increase to 74.7 million tons by 2030. This rapid increase is largely fuelled by higher consumption rates of electrical and electronic goods, shorter life cycles and fewer repair options. E-waste is classed as a hazardous substance, and if not collected and recycled properly, can have adverse environmental impacts. The recoverable material in e-waste represents significant economic value, with the total value of e-waste generated in 2019 estimated to be US $57 billion. Despite the inherent value of this waste, only 17.4% of e-waste was recycled globally in 2019, which highlights the need to establish proper recycling processes at a regional level. This review provides an overview of global e-waste production and current technologies for recycling e-waste and recovery of valuable material such as glass, plastic and metals. The paper also discusses the barriers and enablers influencing e-waste recycling with a specific focus on Oceania.

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Section: Hydrometallurgymentioning

confidence: 99%

E-Waste Recycling and Resource Recovery: A Review on Technologies, Barriers and Enablers with a Focus on Oceania

Yken

Boxall

Cheng

et al. 2021

Metals

107

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“…The stable gold-diiodo and tetraiodo complexes are stable up to pH 14 [26]. Xu et al reported that the gold extraction reached approximately 95% under the optimum conditions: an iodide concentration of 1.0-1.2%, H 2 O 2 concentration of 1-2%, leaching time of 4 h, solid/liquid ratio of 1/10, pH 7 and 25 • C [27]. Batnasan et al [28] demonstrated an iodine-iodide leaching process to recover valuable metals from waste printed circuit boards.…”

Section: Cyanidementioning

confidence: 99%

Hydrometallurgical Treatment of Waste Printed Circuit Boards: Bromine Leaching

Cui¹,

Anderson

2020

Metals

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This paper demonstrates the recovery of valuable metals from shredded Waste Printed Circuit Boards (WPCBs) by bromine leaching. Effects of sodium bromide concentration, bromine concentration, leaching time and inorganic acids were investigated. The most critical factors are sodium concentration and bromine concentration. It was found that more than 95% of copper, silver, lead, gold and nickel could be dissolved simultaneously under the optimal conditions: 50 g/L solid/liquid ratio, 1.17 M NaBr, 0.77 M Br2, 2 M HCl, 400 RPM agitation speed and 23.5 °C for 10 hours. The study shows that the dissolution of gold from waste printed circuit boards in a Br2-NaBr system is controlled by film diffusion and chemical reaction.

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“…Some countries such as the United States have progressed more than others, especially when compared to developing countries [11,22,[70][71][72][73]. However, EEE production and the challenges it brings are a worldwide phenomenon.…”

Section: Crt Mass Flowmentioning

confidence: 99%

“…E-waste growth presents equally a problem, due to the toxicity of its parts, and an opportunity, as valuable minerals contained in the waste are recoverable [11]. Several studies have shown that The EPA drafted the Plug-In to eCycling Guidelines for Materials Management in 2004.…”

Section: Introductionmentioning

confidence: 99%

Cathode Ray Tube Recycling in South Africa

Ledwaba

Sosibo

2017

Recycling

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Households and businesses produce high levels of electrical and electronic waste (e-waste), fueled by modernization and rapid obsolescence. While the challenges imposed by e-waste are similar everywhere in the world, disparities in progress to deal with it exist, with developing nations lagging. The increase in e-waste generation highlights the need to develop ways to manage it. This paper reviews global and South African e-waste management practices with a specific case study on Cathode Ray Tube (CRT) waste. CRTs present the biggest problem for recyclers and policy makers because they contain lead and antimony. Common disposal practices have been either landfilling or incineration. Research into South African CRT waste management practices showed there is still more to do to manage this waste stream effectively. However, recent developments have placed e-waste into a priority waste stream, which should lead to intensified efforts in dealing with it. Overall, these efforts aim to increase diversion from landfill and create value-adding opportunities, leading to social and environmental benefits.

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A Potential Alternative for Precious Metal Recovery from E-waste: Iodine Leaching

Cited by 34 publications

References 24 publications

E-Waste Recycling and Resource Recovery: A Review on Technologies, Barriers and Enablers with a Focus on Oceania

E-Waste Recycling and Resource Recovery: A Review on Technologies, Barriers and Enablers with a Focus on Oceania

Hydrometallurgical Treatment of Waste Printed Circuit Boards: Bromine Leaching

Cathode Ray Tube Recycling in South Africa

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