1. Two methods of waste disposal are landfill and incineration.
(a) Outline each of the above methods
Incineration is the process of burning a material so that only ashes remain, and landfill is method of solid waste disposal in which refuse is buried between layers of dirt so as to fill in or reclaim low-lying ground.
(b) Compare these two methods of waste disposal
Landfill is surely easier to manage than incineration, as it also produces less harmful pollution, where as incineration creates large amount of air pollutant as ash is generated, and there is also a loss in recycling things. But it is a long term security of waste handling. Landfill release high concentration of methane and water pollution and can also create a bad smell.
2(a) Describe the recycling of metal products
Aluminum is one of the easiest metals to recycle, in this process the metal is broken down into pieces and is shipped off to be reused in aluminum products and cans. As Aluminum cans are reduced this also reduces the pollution around the world.
(b) Outline the benefits of recycling
The benefits of recycling are that we can reuse products that are used before by broken down the pieces are producing more cans or products that need to be used. Also, this is a way of reducing pollution in the air. Some people even get paid for recycling items.
Describe the characteristics and sources of low level and high level radioactive waste.
High level waste has a longer half life, it is vitrified, as it is made into glass and buried underground, like in granite, in deep mines, under water, in steel containers.
Low level waste has a shorter half life and is stored under water, in steel containers, and is discharged directly into sea.
(b) Compare the disposal methods for these two types of radioactive waste.
There are many types of radioactive waste, for example the low level waste is stored in cooling ponds until a certain activity is fast. This passes through ions and removes isotops for each activity. The waste is then washed away into the sea. The other type of waste is High level waste which takes thousands of years to lose the activity. The fuel in this is used to be reused. This tends to be a liquid rather than a solid and its dried up and fed into melting parts which then leads to sand. These are stored in salt.
This link is an article with a video of how Bill Gates talks about how we should reduce the nuclear waste around the world.