GCSE Combined Science (AQA)

622 videos | 38 hours

Phytomining and Bioleaching

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Using resources Using the Earth's resources and obtaining potable water

Phytomining and Bioleaching

10:05 Resource Use and Sustainable Extraction
Spec 4.10.1.4 4.10.2.2
Previous Electrolysis of Molten Ionic Compounds Next Waste Water Treatment
  • Earth's metal ore resources are limited and not being replaced.
  • High-grade copper ores are becoming harder to find and mine.
  • High-grade ores have a high percentage of copper, while low-grade ores have a low percentage.
  • New methods using plants and bacteria can extract metals from low-grade copper ores.
  • These methods avoid traditional mining, which is destructive and environmentally damaging.
  • Traditional mining involves digging and moving large amounts of rock, causing noise, dust, and habitat destruction.
  • Phyto mining uses plants to absorb metal compounds from soil, which are then harvested and burned to produce ash containing metal compounds.
  • Bio leaching uses bacteria to produce leachate solutions containing metal compounds.
  • Copper can be extracted from leachate solutions using displacement reactions with scrap iron or through electrolysis.
  • Traditional mining is the quickest method but causes environmental damage.
  • Phyto mining and bio leaching reduce environmental damage and preserve high-grade ore supplies but are slower processes.
  • Phyto mining requires land for plant growth, potentially clearing habitats.
  • Bio leaching produces toxic byproducts like sulfuric acid.
  • Many companies still prefer traditional mining due to the availability of high-grade ores.

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