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Using resources
Extracting Metals
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Cards (9)
Limited or unlimited : The Earth's resource of metal ores?
Limited
Renewable
or
non-renewable
: Metal ores on the earth ?
What is happening to copper ores?
Becoming
scarce
Ways of extracting low-grade ores
Phytomining
Bioleaching
Advantages of using bioleaching and phytomining
Avoids
traditional mining methods :
digging
moving
+
disposing
large amounts of rock
Describe the process of phytomining
Uses
plants
to
absorb
metal compounds
Plants are
harvested
and then
burned
To produce
ash
containing metal compounds
Describe the process of bioleaching
Uses
bacteria
to produce
leachate
solutions
leachate
solutions contain
metal
compounds
What happens to the metal compounds?
Processed to obtain the
metal
Example of obtaining
copper
Obtained from solutions of copper compounds by
displacement
using
scrap
iron.
Electrolysis