Hydrocarbons Flashcards
What countries have the greatest demand for oil?
USA, China and Europe
How are hydrocarbons formed?
Marine deposits are compressed under heat and anaerobic decay. Oil pockets are formed when earth plates move
Where has the greatest oil reserves?
Canada, Saudi Arabia, Iran and Iraq
FPSO
Floating production, storage and offloading vessel
Major oil spills via transportation?
Torrey Canyon, Exxon Valdez and Milford Sound
How can we predict where the oil spill us and where it might go?
- Energy from space radars, resolution (10-25 metres), no affected by clouds, can also be used to track icebergs and fishing vessels.
- GNOME - advanced modelling that predicts movement using software, wind and current data.
How is oil contained?
Booms, skimmers, aerial dispersants, burning, scraping and pressure hosing it back to sea where it’s contained by booms and skimmers
How to dispersants work and what are the disadvantages of using them?
Break oil down faster but are often full of harsh chemicals or oil based products
What is PAH?
Polycyclic Aromatic Hydrocarbons, extremely cytoctoxic compounds released in dispersants
How do oil spills physical impacts wildlife?
Modifies breathing behaviour Impairs respiration Changes preening and causes heat loss, hypothermia and weight loss Failure to react to predators Displacement from habitats
How to oil spills physiologically impact wildlife?
Lethal toxicity - disruption of endocrine and immune systems
Carcinogenic problems linked with PAHs
Down stream effects on progeny, effect cell division and chromosome
Bio accumulation
Damage to oiled seabirds includes…
Matted feathers, loss of waterproofing and thermoregulation
Loss of buoyancy and failure of internal organs and then weigjt loss
How are turtle eggs effected by oil?
Development, acute deformities and fewer hatchlings
How does exposure to oil effect adult turtles?
Salt glands fail, epithelium breaks down which allows infections to occurs
What are the four mentioned affected habitats?
Rocky shores, mangroves, open ocean and beaches