phytomining and bioleaching (C1)

Question 1

how does phytomining work?

Answer 1

1. plants absorb copper ions from low grade copper ores in the soil as they grow
2. plants are burned
3. ash dissolved in sulphuric acid
4. copper sulphate produced
5. waste discarded on slag heap

Question 2

advantages of phytomining

Answer 2

• relatively cheap way of extraction of metal

- helps extract LOW GRADE copper

Question 3

disadvantages of phytomining

Answer 3

• small scale

- takes a long time

Question 4

how does bioleaching work?

Answer 4

1. bacteria feed on low grade ores
2. by biological and chemical process’s a solution of copper ores is formed
3. copper ore called a leachate
4. scrap iron used to displace copper from solution
5. copper purified via. electrolysis

Question 5

advantages of bioleaching

Answer 5

• helps extract low grade copper

- relatively cheap

Question 6

disadvantages of bioleaching

Answer 6

• takes a long time (years)

- only 50% of metal extracted