Disposal of addition polymers
4 marks · NormalExplain what is meant by the term 'non-biodegradable' in the context of addition polymers.
Describe two different methods used for disposing of waste addition polymers.
For one of the methods you described in (b), give one environmental problem it can cause.
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(a) It means the polymer cannot be broken down by bacteria or other living organisms.
(b) Methods: Burying in landfill; incineration/burning; recycling.
(c) Incineration produces carbon dioxide, contributing to global warming. (Or: landfill means polymers remain unchanged for thousands of years; takes up space.)
Common mistakes: Misdefining 'non-biodegradable' as non-recyclable; Giving incorrect examples of disposal (e.g., composting); Omitting mention of bacteria or microorganisms
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Marking points
B1 (a) · 1 mark · Gives a correct definition of 'non-biodegradable' linked to inability to be decomposed by microorganisms.
B2 (b) · 1 mark · Identifies landfill/burial as a disposal method.
B3 (b) · 1 mark · Identifies incineration/burning or recycling as a disposal method.
B4 (c) · 1 mark · States an environmental issue from one method (e.g., CO2 from incineration, or landfill space used).
Worked solution
a) Non-biodegradable means the polymer cannot be broken down by bacteria or other living things, so it does not decompose naturally.
b) Two methods to dispose of addition polymers are: - Burying them in landfill sites - Incineration (burning them to produce heat energy)
c) Incineration releases carbon dioxide into the atmosphere, contributing to climate change.