Phytomining of noble metals – A review

Dinh, Truong; Dobó, Zsolt; Kovács, Helga

doi:10.1016/j.chemosphere.2021.131805

Cited by 40 publications

(22 citation statements)

References 77 publications

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“…Meanwhile, the costly noble metals and unsteady metal exports and supply would inevitably impede their long-term application. 199,200 In principle, the development of advanced catalysts is highly dependent on the mechanical understanding of hydrogen and oxygen electrocatalysis chemistry. [201][202][203] Unfortunately, an accurate understanding of the reaction kinetics of the HER/HOR and OER/ORR, together with the specific role of cations and ions in these reactions, poses a great challenge for researchers.…”

Section: 3mentioning

confidence: 99%

Anion-exchange membrane water electrolyzers and fuel cells

et al. 2022

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Section: 3mentioning

confidence: 99%

Anion-exchange membrane water electrolyzers and fuel cells

et al. 2022

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“…An interesting field for the mining of rare earth and precious metals − and for the decontamination of heavy metal-contaminated soils is phytomining . This young branch of metallurgy involves cultivating a group of special plants which act as metallic hyper-accumulators.…”

Section: Sustainability Aspects In Extractive Metallurgical Processingmentioning

confidence: 99%

The Materials Science behind Sustainable Metals and Alloys

Raabe

2023

Chem. Rev.

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Production of metals stands for 40% of all industrial greenhouse gas emissions, 10% of the global energy consumption, 3.2 billion tonnes of minerals mined, and several billion tonnes of by-products every year. Therefore, metals must become more sustainable. A circular economy model does not work, because market demand exceeds the available scrap currently by about two-thirds. Even under optimal conditions, at least one-third of the metals will also in the future come from primary production, creating huge emissions. Although the influence of metals on global warming has been discussed with respect to mitigation strategies and socio-economic factors, the fundamental materials science to make the metallurgical sector more sustainable has been less addressed. This may be attributed to the fact that the field of sustainable metals describes a global challenge, but not yet a homogeneous research field. However, the sheer magnitude of this challenge and its huge environmental effects, caused by more than 2 billion tonnes of metals produced every year, make its sustainability an essential research topic not only from a technological point of view but also from a basic materials research perspective. Therefore, this paper aims to identify and discuss the most pressing scientific bottleneck questions and key mechanisms, considering metal synthesis from primary (minerals), secondary (scrap), and tertiary (re-mined) sources as well as the energy-intensive downstream processing. Focus is placed on materials science aspects, particularly on those that help reduce CO2 emissions, and less on process engineering or economy. The paper does not describe the devastating influence of metal-related greenhouse gas emissions on climate, but scientific approaches how to solve this problem, through research that can render metallurgy fossil-free. The content is considering only direct measures to metallurgical sustainability (production) and not indirect measures that materials leverage through their properties (strength, weight, longevity, functionality).

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“…Metals may be harvested from the plant biomass through smelting to produce bio‐ores (Novo et al ., 2017). Phytomining to capture metals from wastes is considered to be a strategy of growing importance to transitioning to a circular economy (Dinh et al ., 2022). A growing number of studies are emerging that assess the potential of different plant species to contribute to phytomining.…”

Section: Strategies For Molecular Membrane Separation and Their Biolo...mentioning

confidence: 99%

Molecular membrane separation: plants inspire new technologies

et al. 2023

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Plants draw up their surrounding soil solution to gain water and nutrients required for growth, development and reproduction. Obtaining adequate water and nutrients involves taking up both desired and undesired elements from the soil solution and separating resources from waste. Desirable and undesirable elements in the soil solution can share similar chemical properties, such as size and charge. Plants use membrane separation mechanisms to distinguish between different molecules that have similar chemical properties. Membrane separation enables distribution or retention of resources and efflux or compartmentation of waste. Plants use specialised membrane separation mechanisms to adapt to challenging soil solution compositions and distinguish between resources and waste. Coordination and regulation of these mechanisms between different tissues, cell types and subcellular membranes supports plant nutrition, environmental stress tolerance and energy management. This review considers membrane separation mechanisms in plants that contribute to specialised separation processes and highlights mechanisms of interest for engineering plants with enhanced performance in challenging conditions and for inspiring the development of novel industrial membrane separation technologies. Knowledge gained from studying plant membrane separation mechanisms can be applied to developing precision separation technologies. Separation technologies are needed for harvesting resources from industrial wastes and transitioning to a circular green economy.

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Phytomining of noble metals – A review

Cited by 40 publications

References 77 publications

Anion-exchange membrane water electrolyzers and fuel cells

Anion-exchange membrane water electrolyzers and fuel cells

The Materials Science behind Sustainable Metals and Alloys

Molecular membrane separation: plants inspire new technologies

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