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Chemistry revision Topic 4: Life Cycle Assessment (Recycling (Using waste…
Chemistry revision Topic 4: Life Cycle Assessment
Assesses the environmental impact of the lifetime of a product
Recycling
Using waste materials to make new products
Conserving resources
Don't need so many mines
Less space taken up on landfill so less pollution
Cheaper and less energy used
Created jobs
1.Getting the raw material
Mining metal damages area
Extraction can cause pollution due to energy needed
Transportation to manufacturer causes greenhouse gas emission
Raw materials are processed, using large amounts of energy (extracting metals, fractional distillation)
Large amounts of waste are disposed of
2.Manufacturing and Packaging
Uses lots of energy and other resources
Cause pollution (harmful fumes such as carbon monoxide and hydrogen chloride)
Chemical reactions used to make compounds from raw materials can produce waste products, some of which can b recycled so less waste pollutes the environment.
Water used in this process can't be given back to environment as it would be polluted
3.Using the product
Can damage the environment:
Burning fuels releases greenhouse gasses
Fertilisers can leach intro streams an rivers, damaging ecosystems
Paint gives off toxic fumes
LCA
(how a new product/process may affect the environment)
How long it is used for)
4.Product disposal
Energy used to transport waste to landfill, causing pollutants to be released
Biodegradable materials are in landfills temporarily, non biodegradable materials take time to degrade
Landfill takes up space and pollutes land and water(e.g. paint peeling off)
Incineration
Waste in burnt at high temperature, causes air pollution
Reduces space taken up at landfill
Recycling or reusing materials reduces amount of waste in landfill