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Related Concept Videos

Acid Mine Drainage01:19

Acid Mine Drainage

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Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten...
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Microbial Leaching01:27

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Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
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Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
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Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella,...
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Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
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Toward Decarbonized Metal Mining and Shifting Environmental Impacts: A Quantitative Comparative Assessment.

Riccardo Sprocati1,2,3, Johan Berg Pettersen4, Henning Prommer2,5

  • 1Department of Environmental and Resource Engineering, Technical University of Denmark, Bygningstorvet, Building 115, Kgs. Lyngby 2800, Denmark.

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|March 24, 2026
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Summary

Sustainable mining requires new methods to meet metal demands for electrification. Electrokinetic in-situ recovery (EK-ISR) mining significantly reduces greenhouse gas emissions and avoids solid waste, unlike electrified conventional mining.

Keywords:
electrokinetic in situ recoveryenvironmental impactlife cycle assessmentmetal miningsustainable mining systems

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Area of Science:

  • Environmental Science
  • Materials Science
  • Sustainable Engineering

Background:

  • The global demand for metals like copper, cobalt, gold, and rare-earth elements is rapidly increasing due to societal electrification.
  • Conventional mining practices contribute significantly to greenhouse gas emissions and generate vast amounts of solid waste (tailings and overburden).

Purpose of the Study:

  • To conduct a comparative life cycle assessment of two decarbonized mining routes: fully electrified conventional mining and electrokinetic in-situ recovery (EK-ISR).
  • To evaluate the environmental impact, focusing on greenhouse gas emissions and solid waste generation, for the extraction of key metals.

Main Methods:

  • Comparative life cycle assessment (LCA) was employed to analyze the environmental footprint of different mining techniques.
  • The study focused on the extraction of copper, cobalt, gold, and rare-earth elements under two scenarios: electrified conventional mining and EK-ISR.

Main Results:

  • Electrifying conventional mining can decrease carbon emissions by over tenfold but does not solve the issue of solid waste production.
  • Electrokinetic in-situ recovery (EK-ISR) offers a transformative solution by eliminating the need for waste storage, potentially avoiding over 100 Gt of waste for copper extraction alone in 30 years.
  • While EK-ISR's energy intensity may match conventional mining, its primary environmental benefit lies in waste reduction.

Conclusions:

  • The future of sustainable mining involves transitioning environmental burdens from permanent waste storage to temporary land use for renewable energy infrastructure.
  • EK-ISR presents a viable pathway for significantly reducing the environmental impact of metal extraction, particularly concerning waste generation.