Alternative Methods of extracting metals

• What should you be able to describe by the end of the video?

  How phyto mining and bio leaching extract copper
• Why are most metals found in the Earth's crust already reacted with other elements?

  They are often combined with elements like oxygen
• What is a vital metal mentioned in the material?

  Copper
• What is copper primarily used for?

  In electronic equipment such as phones
• What is the term for the amount of metal in ore that makes extraction economical?

  Economical
• What is the problem with copper ores mentioned in the material?

  Copper ores are becoming scarce
• What do low-grade ores contain?

  A very small amount of copper
• What is the first method of extracting copper discussed?

  Phyto mining
• How do plants contribute to phyto mining?

  They absorb metal compounds and concentrate them
• What happens to the plants after they absorb metal compounds in phyto mining?

  They are harvested and burned
• What does the ash from burned plants contain in phyto mining?

  A relatively high concentration of metal compounds
• What is the second method of extracting metals mentioned?

  Bio leaching
• What role do bacteria play in bio leaching?

  They carry out chemical reactions to produce leachate
• What is the solution produced in bio leaching called?

  Leachate
• What does leachate contain?

  A metal compound that we want
• How can copper be extracted from its compounds?

  By displacing it using iron
• Why is scrap iron used for displacing copper?

  Because it is cheap and more reactive
• What is another method to extract copper besides displacement?

  Electrolysis
• What are the key points about phyto mining and bio leaching?

  • Economically extract metals from low-grade ores
  • Do not involve large-scale digging or transporting rock
• What is the significance of phyto mining and bio leaching methods?

  They allow extraction from limited resources
• What is the environmental benefit of phyto mining and bio leaching?

  They minimize rock disposal and transport
• Where can you find more questions on phyto mining and bio leaching?

  In motivation work for