Using Resources

Question 1

Bioleaching and phytomining

Answer 1

Bioleaching
Bacteria is used to covert copper compounds in the ore to soluble copper compounds separting copper from the ore in processes,the leachate can then be electrolysed
Phytomining
Growing plants in soil that contains copper ,copper builds up in leaves ,the plants are then harvested dried and then burnt ,the compound is then electrolysed

Question 2

How can you test copper surface for water

Answer 2

Add water to anhydrous copper surface the coil or shoudl change from white to blue

Question 3

Why is replying materials inportant

Answer 3

Mining and extracting takes a lot of energy which comes from combustion of fossil fuels
Recycling materials uses less energy ,this cutting down on waste getting Sent to landfill

Question 4

How can glass be recycled

Answer 4

Glass is crushed and the melted to be reshaped into products

Question 5

LCA :getting raw material

Answer 5

Extracting raw material can damage local environment and pollution
Raw materials need to be processed to extract materials and this requires large amount of energy

Question 6

LCA manufacturing

Answer 6

Manufacturing products can use a lot of energy and caus pollution
Also you need to take waste products and how to dispose of them into mind

Question 7

LCA using product

Answer 7

burning fules releases greenhouse gasses and other harmful substances ,fertilisers can leach into streams and cause damage to ecosystems

Question 8

LCA product disposal

Answer 8

Products are disposed of in a landfill ,this pollutes the land
And energy is used to transport waste to landfill

Question 9

Problems with life cycle assessments

Answer 9

Certain types of waste produced over a lifetime can be quantified however with pollutants it’s harder to gives numerical value

Question 10

Properties of potable water

Answer 10

Safe to drink
has ph of 6.5-8.5
Levels of discord salts arnt too high

Question 11

Waste water sources

Answer 11

Agricultural systems and industrial processes

Question 12

Sewage treatment stages

Answer 12

Sewage is screened removing large material
Then undergoes sedimentation,heavier suspended solids fall to bottom and form sludge and effluent floats to the top
Effluent is removed and treated by aerobic digestion
Aerobic respiration releases methane which can be used as energy and digested waste is used in fertiliser
For any remaining toxic substances ,the water is treated with chlorine and uv radiation