Biological Methods

  • Extraction by reduction and electrolysis are really only beneficial when the ore contains sufficiently high proportions of the useful metal.
  • For low grade ores (ores with lower quantities of metals) other techniques are being developed to meet global demand.
  • This is happening in particular with copper as copper ores are becoming more and more scarce.
  • Phytoextraction and bioleaching (bacterial) are two relatively new methods of extracting metals that rely on biological phenomenon.
  • Both of these methods avoid the significant environmental damage caused by the more traditional methods.
  • They are however very slow and also do require either displacement or electrolysis to make the final product.

AQA GCSE Chemistry Notes

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Morgan Curtin Chemistry

Author: Morgan

Morgan’s passion for the Periodic Table begun on his 10th birthday when he received his first Chemistry set. After studying the subject at university he went on to become a fully fledged Chemistry teacher, and now works in an international school in Madrid! In his spare time he helps create our fantastic resources to help you ace your exams.