Electrochemical reduction of Eu(III) using a flow-through porous graphite electrode

Hung, T.; Lee, C. J.

doi:10.1007/bf01023731

Cited by 10 publications

(3 citation statements)

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“…Electrochemical processes have been extensively explored for metal recovery since the 1970s, [12][13][14] including the proposed use of porous flow-through electrodes for recycling silver from photographic fixing solutions. 15 Selective ion recovery from a complex mixture, and/or at low concentrations, has remained the underlying challenge for metal recovery.…”

Section: Electrochemical Separations For Metal Recycling By Xiao Sumentioning

confidence: 99%

Electrochemical Separations for Metal Recycling

Su¹

2020

Electrochem. Soc. Interface

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Recycling of waste is critical for sustainability. Modern industrialization has caused a rapid decline in natural resources, and a dramatic rise in hazardous pollutants released into the environment. A recent study reported that global resource usage rose from 23.7 billion tons in 1970 to 70.1 billion tons in 2010. Global consumption of metals has increased at a significant pace, placing severe environmental and economic pressure for recycling. Electrochemical processes are particularly well suited for metal recovery. Due to the ionic nature of the metals after leaching, both Faradaic and non-Faradaic electrochemical processes can play an important role in separating and purifying these elements. Here, an overview of electrochemical approaches for chemical recycling will be presented, with a focus on metal recovery from electronic waste, battery components, as well as methods for selective recycling specialty metals and rare earth elements. This article discusses emerging recycling methods for value-added compounds beyond metals, including organic compounds, which may point to new directions in chemical recycling. In sum, electrochemical separation processes are expected to play a significant role in waste recycling and contribute towards a sustainable circular economy.

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Section: Electrochemical Separations For Metal Recycling By Xiao Sumentioning

confidence: 99%

Electrochemical Separations for Metal Recycling

Su¹

2020

Electrochem. Soc. Interface

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“…The current efficiency of electrochemical reduction of Eu(III) in aqueous solutions is low due to the evolution of hydrogen gas. 44 In this paper, photochemical reduction is used, since less toxic and harmful chemicals are consumed and the best selectivity is obtained. [45][46][47][48][49] This technique introduces photons to the medium, emitted by a light source, that assist in the electron transfer of an electron from the solvent to the europium ion, causing the reduction of Eu(III) to Eu(II).…”

Section: Introductionmentioning

confidence: 99%

Photochemical recycling of europium from Eu/Y mixtures in red lamp phosphor waste streams

et al. 2015

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“…In this case, electro-reduction in hydrochloric acid media is a better alternative. It has been thoroughly studied at different cathode materials including platinum [3], titanium [4] graphite [5][6][7] and glassy-carbon [8,9]. At carbon electrodes, Eu(III) reduction proceeds selectively [6] at potentials of −0.6 to −0.8 V (versus Ag/AgCl).…”

Section: Introductionmentioning

confidence: 99%