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COMBINED SCIENCE EDXCEL
CHEMISTRY
Hard round extraction
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Cards (17)
What can you use to
contract
metal
from ores

Phytoexttaction
,
bacterial extraction
,
biological extraction
What is phytoextraction?
Phytoextraction is a process where plants absorb
mineral ions
to extract
metals
.
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What are the benefits of phytoextraction?
It reduces the need for
mining
new ore and conserves valuable
ores
with higher metal content.
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What are the steps involved in phytoextraction?
Plants are grown on
low-grade ore
.
Plants absorb
metal ions
through their roots.
Metal ions are concentrated in the
plant cells
.
Plants are harvested and burnt.
Ash contains a higher
concentration
of metal than the
original
ore.
Ash is
processed
to obtain the metal.
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What is the first step in the phytoextraction process?
Plants are grown on a
low-grade
ore that
contains
lower amounts of
metal
.
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How do plants contribute to the phytoextraction process?
Plants absorb
metal ions
through their roots and
concentrate
these ions in their cells.
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What happens to the plants after they absorb metal ions in phytoextraction?
The plants are
harvested
and burnt.
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What is left behind after the plants are burnt in the phytoextraction process?
The ash left behind contains a higher concentration of the
metal
than the original
ore
.
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What is done with the ash after the phytoextraction process?
The ash is processed to obtain the
metal
.
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What is bioleaching?
Bioleaching is a process where certain
bacteria
break down low-grade ores to produce an acidic solution containing
metal ions
.
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What is the solution produced during bioleaching called?
The solution is called leachate.
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What metal can be extracted using bioleaching?
Copper
metal can be extracted using bioleaching.
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What are the environmental impacts of bioleaching?
Bioleaching produces
toxic substances
, including
sulfuric acid
, which can damage the environment.
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Does bioleaching require high temperatures?
No
, bioleaching does
not
need
high
temperatures.
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Is phytoextraction a fast or slow process?
Phytoextraction is
slow.
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What do plants do with the mineral ions they absorb during phytoextraction?
They concentrate these ions in their
cells
.
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What type of ores can bioleaching be used on?
Bioleaching can be used on
low-grade
ores.
View source
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