water pollution: causes

Water Pollution:CAUSES

Pictures taken from: www.indiamart.com | www.neftagaz.ru | www2.macleans.ca

Contamination

Pollutants

Poisonous

Rivers, Lakes & Seas

Detrimental

Marine Life | People

LDCs

Locals queuing for water in AfricaPicture taken from: www.design21sdn.com

Sewage

Households | Industries

Human Waste | Detergent | Chemicals

Treatment Plants

Case Study: Molex - $2 Mil Investment to build Plant

Remove wasteNon-biodegradable substances

Expensive

Algae growth Aquatic

plants below

Animals

Remain

Illegal Dumping

Case Study: Schoeller

HoldingsCyprus Shipping / Hotel Holding

Avoid Costs

Oil-tainted bilge water

4 Occasions[May 2012 – March 2013]

Falsifying Records

$10.4 million FINE

21 March 2013

Industrial

TOXI

COils

Sulfur Nitrates |

Phosphates

Asbestos

Lead | Mercury

Manufacturing Process

Ocean & Marine Dumping Paper |

Food WastePlasticRubberMetallic | Aluminium WasteRU

BBIS

HAluminium = 200

yrs

TIME Paper = 6 wks

Atmospheric DepositionDiagram taken

from: aritech.tnau.ac.in

An oil spill is another form of water pollution.

Occurs when hull is damaged or collision happens.

Difficult to clean up: 1) Non-biodegradable 2) Spreads over large areas easily

Endangers animal and plants which may cause negative impact on human health.

Cleaning up requires huge efforts and is very costly.

Exxon Valdez Oil Spill

One of the most devastating human-caused environmental disasters.

Approximately 55 million US gallons spilled into Prince William Sound.

Cleaning up process involved an estimated 10 000 workers and US$2.1 billion was spent.

Other examples of large oil spills include:

1) Gulf War Oil Spill- Persian Gulf

2) Deepwater Horizon- US, Gulf of Mexico

3) Ixtoc I Oil Spill- Mexico, Gulf of Mexico

4) Fergana Valley- Uzbekistan

5) ABT Summer- Angola

6) Castillo de Bellver- Africa

7) Amoco Cadiz- France, Brittany

Consequence /impacts of Water PollutionEnvironmental impactEconomic impactSocial impact

Endangering Plant & Animal Species Oil SpillsI. Sticks to feathersII. Air trapped between layers of fur/feathers

removedIII. Birds therefore unable to fly thus drowningIV. Birds and animals freeze to death

Impact on ecosystem as many animals/birds perish, disrupting the food chain etc.

Endangering Plant & Animal Species Improper disposal of waste materialI. Detergents/Chemicals improperly disposedII. Leads to growth of algaeIII. Plants dieIV. Animals do not have food - they die

Impact on ecosystem as many animals/birds perish, disrupting the food chain etc.

Negative Impact on humans Indirect effect on usI. Chemicals are disposed of improperly

(China)II. Fishes that consume these plants affectedIII. When we eat them, we may get poisoningIV. People may also suffer from cholera and

typhoid when they drink water that is contaminated.

Economic impacts Impacts Fishermen

Cleaning up oil spills can be extremely costly and requires huge effort

I. Exxon Valdez II. 2.1 billion to clean upIII. 10000 workers

Oil spills

Contaminated Water